Avalara (AVLR) 10-K 24 Feb 22 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Feb. 17, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Trading Symbol	AVLR
Entity Registrant Name	AVALARA, INC.
Entity Central Index Key	0001348036
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		87,486,573
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-38525
Entity Tax Identification Number	91-1995935
Entity Address, Address Line One	255 South King Street
Entity Address, Address Line Two	Suite 1800
Entity Address, City or Town	Seattle
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98104
City Area Code	206
Local Phone Number	826-4900
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, Par Value $0.0001 Per Share
Security Exchange Name	NYSE
Entity Incorporation, State or Country Code	WA
Document Annual Report	true
Document Transition Report	false
ICFR Auditor Attestation Flag	true
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Public Float			$ 13,670
Auditor Firm ID	34
Auditor Location	Seattle, Washington
Auditor Name	Deloitte & Touche, LLP
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Portions of the Registrant’s Definitive Proxy Statement relating to the 2022 Annual Meeting of Shareholders, are incorporated by reference into Part III of this report. The Definitive Proxy Statement will be filed with the Securities and Exchange Commission within 120 days after the end of the 2021 fiscal year.

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,514,064	$ 673,593
Restricted cash	37,700	19,953
Trade accounts receivable—net of allowance for doubtful accounts of $5,803 and $3,983, respectively	114,248	75,857
Deferred commissions	16,364	12,245
Prepaid expenses and other current assets	29,267	20,098
Total current assets before customer fund assets	1,711,643	801,746
Funds held from customers	62,509	30,598
Receivable from customers—net of allowance of $439 and $593, respectively	1,472	563
Total current assets	1,775,624	832,907
Noncurrent assets:
Restricted cash	0	37,700
Deferred commissions	52,155	38,625
Operating lease right-of-use assets—net	44,385	52,320
Property and equipment—net	46,464	34,713
Intangible assets—net	96,818	86,513
Goodwill	672,381	513,234
Other noncurrent assets	10,704	6,321
Total assets	2,698,531	1,602,333
Current liabilities:
Trade payables	16,683	20,280
Accrued expenses	109,792	84,532
Deferred revenue	280,816	208,026
Accrued purchase price related to acquisitions	51,476	22,473
Accrued earnout liabilities	33,151	749
Operating lease liabilities	11,453	11,339
Total current liabilities before customer fund obligations	503,371	347,399
Customer fund obligations	64,302	31,549
Total current liabilities	567,673	378,948
Noncurrent liabilities:
Convertible senior notes—net	961,259	0
Deferred revenue	2,139	1,664
Accrued purchase price related to acquisitions	7,988	49,057
Accrued earnout liabilities	81,485	34,468
Operating lease liabilities	45,614	56,625
Deferred tax liability	5,158	1,031
Other noncurrent liabilities	761	380
Total liabilities	1,672,077	522,173
Commitments and contingencies	0	0
Shareholders' equity:
Preferred stock, $0.0001 par value – no shares issued and outstanding at December 31, 2021, and December 31, 2020, and 20,000 shares authorized as of December 31, 2021, and December 31, 2020	0	0
Common stock, $0.0001 par value – 87,087 and 85,058 shares issued and outstanding at December 31, 2021, and December 31, 2020, respectively, and 600,000 shares authorized as of December 31, 2021, and December 31, 2020	9	9
Additional paid-in capital	1,714,483	1,640,867
Accumulated other comprehensive loss	(3,428)	(1,339)
Accumulated deficit	(684,610)	(559,377)
Total shareholders’ equity	1,026,454	1,080,160
Total liabilities and shareholders' equity	$ 2,698,531	$ 1,602,333

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Trade accounts receivable, allowance for doubtful accounts	$ 5,803	$ 3,983
Receivable from customers, allowance	$ 439	$ 593
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Preferred stock, shares authorized	20,000,000	20,000,000
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares, issued	87,087,000	85,058,000
Common stock, shares, outstanding	87,087,000	85,058,000
Common stock, shares authorized	600,000,000	600,000,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue:
Revenues	$ 698,977	$ 500,569	$ 382,421
Cost of revenue:
Cost of revenues	204,832	143,095	115,299
Gross profit	494,145	357,474	267,122
Operating expenses:
Research and development	167,391	119,710	82,442
Sales and marketing	296,006	204,490	168,634
General and administrative	137,301	95,242	71,918
Total operating expenses	600,698	419,442	322,994
Operating loss	(106,553)	(61,968)	(55,872)
Other income (expense):
Fair value changes in earnout liabilities	(12,231)	2,325	1,043
Interest income	108	1,678	6,037
Interest expense	(2,311)		(289)
Other income (expense), net	(938)	473	(178)
Total other income (expense), net	(15,372)	4,476	6,613
Loss before income taxes	(121,925)	(57,492)	(49,259)
(Provision for) benefit from income taxes	(3,308)	8,309	(955)
Net loss	$ (125,233)	$ (49,183)	$ (50,214)
Net loss per share attributable to common shareholders, basic and diluted	$ (1.45)	$ (0.61)	$ (0.68)
Weighted average shares of common stock outstanding, basic and diluted	86,263	80,985	73,345
Subscription and Returns
Revenue:
Revenues	$ 633,091	$ 465,825	$ 355,181
Cost of revenue:
Cost of revenues	173,414	124,333	97,824
Professional Services
Revenue:
Revenues	65,886	34,744	27,240
Cost of revenue:
Cost of revenues	$ 31,418	$ 18,762	$ 17,475

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (125,233)	$ (49,183)	$ (50,214)
Other comprehensive (loss) income — Foreign currency translation	(2,089)	1,380	(374)
Total comprehensive loss	$ (127,322)	$ (47,803)	$ (50,588)

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Portway International, Inc	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Common StockPortway International, Inc	Additional Paid-In Capital	Additional Paid-In CapitalPortway International, Inc	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated DeficitCumulative Effect, Period of Adoption, Adjustment
Balance at Dec. 31, 2018	$ 109,553			$ 7		$ 599,493		$ (2,345)	$ (487,602)
Balance (ASC 606) at Dec. 31, 2018			$ 27,622							$ 27,622
Balance, shares at Dec. 31, 2018				66,768,563
Proceeds from common stock offering, net of underwriting discounts	274,705					274,705
Proceeds from common stock offering, net of underwriting discounts, shares				4,133,984
Public offering costs	(1,198)					(1,198)
Exercise of stock options	58,020			$ 1		58,019
Exercise of stock options, shares				5,924,142
Shares tendered for cashless redemption of stock-based awards	(1,183)					(1,183)
Shares tendered for cashless redemption of stock-based awards, shares				(16,517)
Vesting of restricted stock units, shares				52,827
Stock-based compensation expense	34,400					34,400
Shares issued under employee stock purchase plan	12,293					12,293
Shares issued under employee stock purchase plan, shares				506,897
Shares issued to purchase intangible assets	98					98
Shares issued to purchase intangible assets, shares				77,724
Gain (Loss) on translation adjustment	(374)							(374)
Net loss	(50,214)								(50,214)
Balance at Dec. 31, 2019	463,722			$ 8		976,627		(2,719)	(510,194)
Balance, shares at Dec. 31, 2019				77,447,620
Proceeds from common stock offering, net of underwriting discounts	556,312			$ 1		556,311
Proceeds from common stock offering, net of underwriting discounts, shares				4,527,558
Public offering costs	(701)					(701)
Exercise of stock options	39,946					39,946
Exercise of stock options, shares				2,518,572
Vesting of restricted stock units, shares				308,754
Stock-based compensation expense	48,570					48,570
Shares issued under employee stock purchase plan	11,337					11,337
Shares issued under employee stock purchase plan, shares				157,705
Shares issued related to business combination earnouts		$ 7,500					$ 7,500
Shares issued related to business combination earnouts, Shares					89,318
Shares issued to purchase intangible assets	87					87
Shares issued to purchase intangible assets, shares				1,191
Shares issued for acquisitions of businesses	1,190					1,190
Shares issued for acquisitions of businesses, shares				7,009
Gain (Loss) on translation adjustment	1,380							1,380
Net loss	(49,183)								(49,183)
Balance at Dec. 31, 2020	$ 1,080,160			$ 9		1,640,867		(1,339)	(559,377)
Balance, shares at Dec. 31, 2020	85,058,000			85,057,727
Exercise of stock options	$ 21,779					21,779
Exercise of stock options, shares	1,223,395			1,223,395
Vesting of restricted stock units, shares				524,246
Stock-based compensation expense	$ 89,688					89,688
Shares issued under employee stock purchase plan	14,446					14,446
Shares issued under employee stock purchase plan, shares				116,881
Shares issued to purchase intangible assets	0
Shares issued for acquisitions of businesses	22,971					22,971
Shares issued for acquisitions of businesses, shares				164,416
Purchase of capped calls	(75,268)					(75,268)
Gain (Loss) on translation adjustment	(2,089)							(2,089)
Net loss	(125,233)								(125,233)
Balance at Dec. 31, 2021	$ 1,026,454			$ 9		$ 1,714,483		$ (3,428)	$ (684,610)
Balance, shares at Dec. 31, 2021	87,087,000			87,086,665

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net loss	$ (125,233)	$ (49,183)	$ (50,214)
Adjustments to reconcile net loss to net cash provided by operating activities:
Stock-based compensation	88,097	48,170	34,349
Depreciation and amortization	36,526	20,233	15,807
Amortization of debt issuance costs	1,367
Asset impairments		794
Impairment of capitalized cloud computing costs	667
Deferred income tax expense (benefit)	1,128	(9,419)	(223)
Non-cash operating lease costs	9,549	8,111	5,000
Fair value changes in earnout liabilities	12,231	(2,325)	(1,043)
Non-cash bad debt expense	1,801	2,063	1,367
Other	(783)	(230)	104
Changes in operating assets and liabilities:
Trade accounts receivable	(36,053)	(17,921)	(12,862)
Prepaid expenses and other current assets	(10,986)	(3,333)	(3,544)
Deferred commissions	(17,648)	(12,454)	(19,149)
Other noncurrent assets	(4,362)	(2,843)	(1,265)
Trade payables	(4,240)	8,026	5,783
Accrued expenses	22,646	23,979	16,246
Deferred revenue	71,406	39,254	37,558
Operating lease liabilities	(11,995)	(10,304)	(5,764)
Net cash provided by operating activities	34,118	42,618	22,150
Cash flows from investing activities:
Purchase of property and equipment	(7,659)	(4,501)	(7,885)
Capitalized software development costs	(13,764)	(4,159)	(2,295)
Cash paid for acquisitions of businesses, net of cash and restricted cash equivalents acquired	(76,646)	(368,198)	(30,310)
Cash paid for acquired intangible assets	(1,900)	(1,200)	(139)
Cash paid for purchases of customer fund available-for-sale securities	(381)
Net cash used in investing activities	(100,350)	(378,058)	(40,629)
Cash flows from financing activities:
Proceeds from common stock offering, net of underwriting discounts		556,312	274,705
Payments of deferred financing costs		(686)	(555)
Proceeds from convertible senior notes	977,500
Payments of debt issuance costs	(17,609)
Purchase of capped calls	(75,268)
Proceeds from exercise of stock options	21,779	39,946	58,019
Proceeds from purchases of stock under employee stock purchase plan	14,446	11,337	12,293
Taxes paid related to net share settlement of stock-based awards			(1,183)
Acquisition-related post-closing payments	(20,821)	(2,763)
Payments related to business combination earnouts	(33)	(3,760)	(375)
Payments related to asset acquisition earnouts	(1,266)	(65)
Payments on financed asset purchases	(104)
Net increase in customer fund obligations	20,288	5,738	11,506
Net cash provided by financing activities	918,912	606,059	354,410
Foreign currency effect	(621)	(108)	(33)
Net change in cash, cash equivalents, restricted cash, and restricted cash equivalents	852,059	270,511	335,898
Cash, cash equivalents, restricted cash, and restricted cash equivalents—Beginning of period	761,844	491,333	155,435
Cash, cash equivalents, restricted cash, and restricted cash equivalents—End of period	1,613,903	761,844	491,333
Reconciliation of cash, cash equivalents, restricted cash, and restricted cash equivalents to the Consolidated Balance Sheets, end of period:
Cash and cash equivalents	1,514,064	673,593	466,950
Restricted cash	37,700	57,653
Restricted cash equivalents—funds held from customers	62,139	30,598	24,383
Supplemental cash flow disclosures:
Cash paid for interest expense	0	0	122
Cash paid for operating lease liabilities	15,563	14,492	9,784
Cash paid for income taxes	1,582	1,155	1,121
Non-cash investing and financing activities:
Stock issued related to business combinations	22,971	8,690	0
Accrued purchase price related to acquisitions	10,055	69,600	4,902
Accrued value of earnout related to acquisitions of businesses	67,280	34,468	15,351
Accrued purchase of intangible assets	1,197	716	147
Fair value of common stock issued to purchase intangible assets	0	87	98
Customer fund obligations assumed in business combinations	12,464	0	0
Property and equipment additions in accounts payable and accrued expenses	1,011	837	768
Capitalized internally developed software costs included in accounts payable and accrued expenses	1,449	0	0
Stock-based compensation costs capitalized to internally developed software	1,397	430	51
Operating lease right-of-use assets in exchange for lease obligations	$ 1,614	$ 11,835	$ 15,861

Nature of Operations

Nature of Operations	12 Months Ended
	Dec. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Operations	1. Nature of Operations Avalara, Inc. (the “Company”) provides software solutions that help businesses of all types and sizes comply with transaction tax requirements worldwide. The Company offers a broad and growing suite of compliance solutions for transaction taxes and other product-related taxes such as sales and use tax, value-added tax (“VAT”), fuel excise tax, beverage alcohol, cross-border taxes (including tariffs and duties), lodging tax, communications tax, and insurance premium tax. These solutions enable customers to automate the process of determining taxability, identifying applicable tax rates, determining and collecting taxes, preparing and filing returns, remitting taxes, maintaining tax records, and managing compliance documents. The Company, a Washington corporation, was originally incorporated in 1999 and is headquartered in Seattle, Washington. The Company has wholly owned subsidiaries outside of the U.S. in Brazil, Canada, Europe, and India which conduct sales and operations and provide business development, software development, and support services.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Significant Accounting Policies	2. Significant Accounting Policies Accounting Principles The consolidated financial statements and accompanying notes were prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). Reclassifications Certain prior period Principles of Consolidation The accompanying consolidated financial statements include those of the Company and its subsidiaries after elimination of all intercompany accounts and transactions. Segments The Company operates its business as one operating segment. Operating segments are defined as components of an enterprise about which separate financial information is evaluated regularly by the chief operating decision maker, the Company’s Chief Executive Officer, in deciding how to allocate resources and assess performance. The Company’s chief operating decision maker allocates resources and assesses performance based upon discrete financial information at the consolidated level. In 2021, approximately 8%, and in each of 2020 and 2019, approximately 6%, of the Company’s revenue was generated outside of the United States, respectively. As of December 31, 2021, and 2020, approximately 25% and 27%, respectively, of the Company’s long-lived assets were held outside of the United States. As of December 31, 2021, and 2020, approximately 12% and 15% of the Company’s long-lived assets were held in India, respectively. As of both December 31, 2021, and 2020, approximately 9% of the Company’s long-lived assets were held in the United Kingdom. Use of Estimates The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Significant estimates and judgments related to revenue are described below in the Revenue Recognition Accounting Policy. Significant estimates impacting expenses include: expected credit losses associated with the allowance for doubtful accounts; the measurement of fair values of stock-based compensation award grants; the expected payout level of performance share unit grants; the expected earnout obligations in connection with acquisitions; the expected term of the customer relationship for capitalized contract cost amortization; the valuation and useful lives of acquired intangible assets; the valuation of the fair value of reporting units for analyzing goodwill ; and the capitalization and useful life of capitalized software development costs . Actual results could materially differ from those estimates. Risks and Uncertainties The Company has incurred significant operating losses since its inception, including net losses of $125.2 million, $49.2 million, and $50.2 million for the years ended December 31, 2021, 2020, and 2019, respectively. The Company had an accumulated deficit of $684.6 million and $559.4 million as of December 31, 2021, and 2020, respectively. The Company believes that its cash and cash equivalents of $1.5 billion as of December 31, 2021, is adequate to satisfy its current obligations. Cash and Cash Equivalents Cash and cash equivalents include highly liquid investments with original maturities of three months or less. The carrying value of our cash and cash equivalents approximates fair value given their short-term nature. Restricted Cash Restricted cash represents cash that is segregated from the Company’s operating funds and is held to satisfy holdback liabilities related to acquisitions (see Note 5). Fair Value of Financial Instruments Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A three-level fair value hierarchy prioritizes the inputs used to measure fair value. The hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows: • Level 1 • Level 2 • Level 3 The Company’s assessment of the significance of an input to the fair value measurement requires judgment, which may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels. The carrying amounts reported in the consolidated financial statements approximate the fair value for cash equivalents, restricted cash equivalents, trade accounts receivable, trade payables, and accrued expenses, due to their short-term nature. The Company has measured the fair value of money market funds and available-for-sale securities based on quoted prices in active markets for identical assets and liabilities. T Trade Accounts Receivable Trade accounts receivable represent amounts due from customers when the Company has invoiced the customer and has not yet received payment. An invoice is issued when the customer is contractually obligated to pay for software subscriptions and/or services. Trade accounts receivable are presented net of an allowance for doubtful accounts. The allowance for doubtful accounts is the Company’s best estimate of the amount of expected credit losses in existing trade accounts receivable. The allowance for doubtful accounts is based on the assessment of collectability. The Company regularly reviews the adequacy of the allowance for doubtful accounts by considering several factors, including the age of each outstanding invoice, the collection history of customers, current economic conditions, and forecasted economic conditions. Additions to the allowance are charged to expense to the extent that revenue has been recognized for a contract. Amounts not yet recognized in revenue are charged to deferred revenue. The table below details the allowance for doubtful accounts (in thousands): December 31, 2021 2020 2019 Balance at the beginning of the year $ 3,983 $ 1,179 $ 521 Additions 4,587 4,412 1,201 Write-offs (2,767 ) (1,608 ) (543 ) Balance at the end of the year $ 5,803 $ 3,983 $ 1,179 Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk are primarily cash, cash equivalents, restricted cash, accounts receivable, and funds held from customers. Cash, cash equivalents, restricted cash, and funds held from customers are held in financial institutions management believes have a high credit standing. To manage credit risk related to accounts receivable, the Company evaluates customers’ financial condition and generally collateral is not required. As of December 31, 2021, and 2020, there were no customers that represented more than 10% of the Company’s net trade accounts receivable or more than 10% of the Company’s revenue in any of the periods presented. Customer Funds Assets and Obligations Funds Held from Customers The Company has established a Delaware statutory trust (the “Customer Trust”) and appointed a federally insured bank as trustee, and the Customer Trust holds certain funds provided by its customers pending remittance to tax authorities. The Company is the sole beneficial owner of the Customer Trust. The Customer Trust is intended to be a bankruptcy-remote legal entity and meets the criteria in Accounting Standards Codification (“ASC”) Topic 810, Consolidation to be characterized as a variable interest entity (“VIE”). The Customer Trust is included in the Company’s consolidated financial statements because the Company determined it has a controlling financial interest in the Customer Trust as it has both (1) the power to direct the activities that most significantly impact the economic performance of the Customer Trust (including the power to make investment decisions for the trust) and (2) the right to receive benefits in the form of investment returns that could potentially be significant to the Customer Trust. In 2021, the Company began having certain customers remit tax payments to the Customer Trust with the intention that all customer funds will eventually be held by the Customer Trust. Funds held from customers represent restricted cash equivalents and available - for - sale securities that, based upon the Company’s intent, are restricted solely for satisfying the obligations to remit funds relating to the Company’s tax remittance services. Customer fund obligations represent the Company ’ s contractual obligations to remit funds to satisfy customers ’ tax obligations and are recorded on the consolidated balance sheets at the time that the Company or the Customer Trust collects funds from customers. December 31, December 31, 2021 2020 Funds held from customers (current assets): Restricted cash equivalents – Company $ 13 $ 30,598 Restricted cash equivalents – Customer Trust 62,126 — Available-for-sale securities – Customer Trust 370 — Funds held from customers $ 62,509 $ 30,598 Customer fund obligations (current liabilities): Customer fund obligations – Company $ 64,302 $ 31,549 Customer fund obligations $ 64,302 $ 31,549 Receivables from Customers Occasionally, the Company will pay a tax obligation to taxing authorities on behalf of its customer, prior to receiving funds from the customer or prior to receiving the refund due to the customer from the taxing authority. Accounts receivable from customers represent amounts the customer is contractually obligated to repay to the Company. The future economic benefit to the Company is restricted solely for the repayment of customer funds and taxing authority obligations. Receivables from customers deemed uncollectible are charged against a separate allowance for doubtful accounts. The allowance against receivables from customers is a result of the Company assuming credit risk associated with its customers’ tax remittance obligations. The table below details the allowance against receivables from customers (in thousands): December 31, 2021 2020 2019 Balance at the beginning of the year $ 593 $ 270 $ 198 Charged to expense 290 693 166 Write-offs (444 ) (370 ) (94 ) Balance at the end of the year $ 439 $ 593 $ 270 Customer Funds Obligations Customer funds obligations represent the Company’s contractual obligations to remit collected funds to satisfy customer tax payments. Customer funds obligations are reported as a current liability on the consolidated balance sheets, as the obligations are expected to be settled within one year. Changes in customer funds obligations liability are presented as cash flows from financing activities. Marketable Securities The Company invests a portion of its funds held from customers in marketable securities classified as available-for-sale. Available-for-sale securities are recorded at fair value on the consolidated balance sheets. If the fair value of an available-for-sale security is below its amortized cost, the Company assesses whether it intends to sell the security or if it is more likely than not the Company will be required to sell the security before recovery. If either of those two conditions is met, the Company would recognize a charge in earnings equal to the entire difference between the security’s amortized cost basis and its fair value. If the Company does not intend to sell a security or if it is more likely than not that it will be required to sell the security before recovery, the unrealized loss is separated into an amount representing the credit loss, which is recognized in earnings, and the amount related to all other factors, which is recognized in accumulated other comprehensive loss. The Company did not recognize any credit impairment losses during the year ended December 31, 2021, or 2020. Cloud Computing Arrangements Implementation costs incurred in a cloud computing arrangement that is a service contract are capitalized and recorded in prepaid expenses and other current assets and other noncurrent assets on the consolidated balance sheets. Capitalized implementation costs include external professional service costs and internal personnel costs related to technical development. Post-implementation training and maintenance costs are expensed as incurred. For the years ended December 31, 2021, and 2020, $4.2 million and $3.1 million of cloud computing implementation costs were capitalized, respectively. Capitalized cloud computing implementation costs are amortized on a straight-line basis over the expected term of the arrangement. Cloud computing arrangements are tested for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. During 2021, the Company recorded a $0.7 million impairment charge related to cloud computing arrangements that were abandoned. The impairment charge is recorded in general and administrative and research and development expenses in the consolidated statement of operations for the year ended December 31, 2021. Capitalized Software Software development costs for internal-use software (i.e., cloud-based software solutions) are capitalized once the project is in the application development stage in accordance with the accounting guidance for internal-use software. These capitalized costs include external direct costs of services consumed in developing or obtaining the software and personnel expenses for employees who are directly associated with the development. Capitalization of these costs concludes once the project is substantially complete, and the software is ready for its intended purpose. Post-configuration training and maintenance costs are expensed as incurred. For the years ended December 31, 2021, 2020, and 2019, $16.6 million, $4.2 million, and $2.3 million of software development costs were capitalized, respectively. Capitalized software development costs are amortized on a straight-line basis over the estimated useful life, generally 3 to 6 years. Software development costs are tested for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. In circumstances where software is developed for both cloud-based software solutions and for the purpose of being sold, leased, or otherwise marketed (i.e., customer hosted software), capitalization of development costs occurs after technological feasibility of the software is established and continues until the product is available for general release to customers. Since the Company’s developed software is available for general release concurrent with the establishment of technological feasibility, development costs are not capitalized in these circumstances. Property and Equipment Property and equipment are stated at cost less accumulated depreciation. Depreciation on property and equipment is computed on the straight-line method over the estimated useful life of the asset or the lease term (for leasehold improvements), whichever is shorter. Upon retirement or sale, the cost of the disposed asset and the related accumulated depreciation are removed, and any resulting gain or loss is recorded in the consolidated statements of operations. Maintenance and repairs that do not improve or extend the lives of the respective assets are charged to expense in the period incurred. Long-Lived Assets The Company evaluates long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. An impairment is recognized in the event the carrying value of such assets is not recoverable. If the carrying value is not recoverable, the fair value is determined, and an impairment is recognized for the amount by which the carrying value exceeds the fair value. An impairment of the Company’s operating lease right-of-use assets and related property and equipment of $0.8 million was recorded in 2020 (see Note 3). The impairment charge is recorded in general and administrative expenses in the consolidated statements of operations for the year ended December 31, 2020. Leases Leases arise from contracts that convey the right to control the use of identified property or equipment for a period of time in exchange for consideration. The Company’s leasing arrangements are primarily for office space used to conduct operations. Additionally, the Company has leases for vehicles, office equipment and servers. The Company determines whether an arrangement is or contains a lease at the inception date, based on whether there is an identified asset and whether the Company controls the use of the identified asset throughout the period of use. Leases commence when the lessor makes the asset available for use. Leases are classified at commencement as either operating or finance leases. All the Company’s leases are classified as operating leases. Rent expense for operating leases is recognized on the straight-line method over the term of the agreement beginning on the lease commencement date. At commencement, the Company records an operating lease liability at the present value of future lease payments, net of any future lease incentives to be received. Lease agreements may include cancellable future periods subject to termination or extension options, which are not included in the future lease payments unless it is reasonably certain the Company will continue to utilize the asset for those periods. The discount rate used to determine the present value is the Company’s incremental borrowing rate (“IBR”) unless the interest rate implicit in the lease is readily determinable. Since the Company’s leases do not have an implicit interest rate that is readily determinable, the Company used the IBR as the discount rate for all leases. The IBR is an estimate of the Company’s collateralized borrowing rate and is estimated based on information available at the lease commencement date, including the lease term and the currency in which the arrangement is denominated. At commencement, a corresponding right-of-use asset is recorded, which is calculated based on the amount of the operating lease liability, adjusted for any advance lease payments paid, initial direct costs incurred, or lease incentives received prior to commencement. Right-of-use assets are subject to evaluation for impairment or disposal on a basis consistent with other long-lived assets (see Note 3). The Company does not record right-of-use assets or operating lease liabilities for leases with initial terms of 12 months or less and does not separate nonlease components from the associated lease components for real estate leases. The primary impact of this policy election is that included in the calculation of operating lease liabilities are any fixed and noncancelable future payments due under the contract for items such as common area maintenance, utilities, parking, and other costs. Lease-related costs, which are variable rather than fixed, are expensed in the period incurred. Variable lease costs consist primarily of common area maintenance and utilities costs for the Company’s office spaces that are due based on the actual costs incurred by the landlord. Lease payments that depend on an index or a rate are measured using the index or rate at the commencement date and are included in operating lease costs. Subsequent increases to lease payments due to a change in the index or rate are expensed as a variable lease cost. The Company accounts for subleases from the perspective of a lessor and evaluates the duration of subleases based on the reasonable certainty of any sublessor termination and extension options, as well as the lease term for the underlying asset. The Company has one sublease classified as an operating lease. For subleases classified as operating leases, the Company records sublease income as a reduction of lease expense on the straight-line method over the term of the sublease. Business Combinations and Goodwill The Company’s identifiable assets acquired and liabilities assumed in a business combination are recorded at their acquisition date fair values, which may be considered preliminary and subject to adjustment during the measurement period, which is up to one year from the acquisition date. The valuation requires management to make significant estimates and assumptions, especially with respect to intangible assets. Critical estimates in valuing intangible assets include, but are not limited to: • future expected cash flows from customer agreements, customer lists, distribution agreements, non-compete agreements, and proprietary content and technology; • assumptions about the length of time the brand will continue to be used in the Company’s suite of solutions; • royalty rates used to estimate the fees that could be charged to license the proprietary content and technology; and • discount rates used to determine the present value of recognized assets and liabilities. The Company’s estimates of fair value are based upon assumptions it believes to be reasonable, but that are inherently uncertain and unpredictable. Assumptions may be incomplete or inaccurate, and unanticipated events and circumstances may occur. Goodwill is calculated as the excess of the purchase price over the fair value of net assets acquired, including the amount assigned to identifiable intangible assets. Acquisition-related costs, including advisory, legal, accounting, valuation, and other costs, are expensed in the periods in which these costs are incurred. The results of operations of an acquired business are included in the consolidated financial statements beginning at the acquisition date. Goodwill is tested for impairment annually on October 31, or in the event of certain occurrences. There was no goodwill impairment recorded for the years ended December 31, 2021, 2020 or 2019. The Company estimates the fair value of the earnout liabilities related to business combinations using various valuation approaches, as well as significant unobservable inputs, reflecting the Company’s assessment of the assumptions market participants would use to value these liabilities. Following final determination of the acquisition date fair value, the fair value of the earnout is remeasured each reporting period, with any change in the value recorded as fair value changes in earnout liabilities in the consolidated statements of operation. The Company recorded Acquired Intangible Assets Acquired intangible assets consist of developed technology, including in-process research and development (“IPR&D”), customer relationships, backlog, database content, noncompetition agreements, and tradenames and trademarks, resulting from the Company’s acquisitions. Acquired intangible assets are recorded at fair value on the date of acquisition and amortized over their estimated useful lives. IPR&D is initially capitalized at fair value as a developed technology intangible asset with an indefinite life and assessed for impairment thereafter. When an IPR&D project is completed, it is amortized over the asset’s estimated useful life. The Company recognizes an earnout liability for acquisitions of intangible assets that are accounted for as an asset acquisition when the liability is earned and the amount is known. The earnout liability is capitalized as part of the cost of the assets acquired and amortized over the remaining useful life of the asset. Asset acquisition-related costs, primarily legal fees, are capitalized and included in the cost basis of the intangible asset when incurred. Convertible Senior Notes In August 2021, the Company completed a private offering of $977.5 million principal amount of 0.25% convertible senior notes due 2026 (the “2026 Notes”). As discussed below, the Company early adopted ASU No. 2020-06 as of January 1, 2021, and concluded that the 2026 Notes will be accounted for as debt, with no bifurcation of the embedded conversion feature. Debt issuance costs related to the Company’s issuance of the 2026 Notes consist primarily of purchaser’s discounts, commissions, and related costs. The debt issuance costs were recorded as a direct deduction from the liability associated with the 2026 Notes on the consolidated balance sheet and are amortized to interest expense over the term of the 2026 Notes. In connection with the offering of the 2026 Notes, the Company purchased capped calls from certain financial institutions with respect to its common stock. As the capped calls are both legally detachable and separately exercisable from the 2026 Notes, the Company accounts for the capped calls separately from the 2026 Notes. The capped calls are indexed to the Company’s own common stock and classified in stockholder’s equity. As such, the premiums paid for the capped calls have been included as a net reduction to additional paid-in capital in the consolidated balance sheet as of December 31, 2021. Income Taxes The Company’s deferred tax assets and liabilities are determined based on temporary differences between the financial reporting and income tax basis of assets and liabilities and are measured using the tax rates that will be in effect when the differences are expected to reverse. A valuation allowance is recorded when it is more likely than not that some of the deferred tax assets will not be realized. The Company assesses its income tax positions and records tax benefits or expense based upon management’s evaluation of the facts, circumstances, and information available at the reporting date. The objectives of accounting for income taxes are to recognize the amount of taxes payable or refundable for the current year and deferred tax liabilities and assets for the future tax consequences of events that have been recognized in an entity’s financial statements or tax returns. The Company will recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. Judgment is required in assessing the future tax consequences of events that have been recognized in the Company’s consolidated financial statements or tax returns. Variations in the actual outcome of these future tax consequences could materially impact the consolidated financial statements. Revenue Recognition The Company primarily generates revenue from fees paid for subscriptions to tax compliance solutions and fees paid for services performed in preparing and filing tax returns on behalf of its customers. Amounts that have been invoiced are recorded in trade accounts receivable and deferred revenue, contract liabilities, or revenue, depending upon whether the revenue recognition criteria have been met. Revenue is recognized once the customer is provisioned and as services are provided in an amount that reflects the consideration the Company expects to be entitled to in exchange for those services. The Company determines revenue recognition through the following five-step framework: • Identification of the contract, or contracts, with a customer; • Identification of the performance obligations in the contract; • Determination of the transaction price; • Allocation of the transaction price to the performance obligations in the contract; and • Recognition of revenue when, or as, the Company satisfies a performance obligation. The Company identifies performance obligations in its contracts with customers, which primarily include subscription services and professional services. The transaction price is determined based on the amount which the Company expects to be entitled to in exchange for providing the promised services to the customer. The transaction price in the contract is allocated to each distinct performance obligation on a relative standalone selling price basis. Revenue is recognized when performance obligations are satisfied. Contract payment terms are typically net 30 days. Collectability is assessed based on a number of factors including collection history and creditworthiness of the customer, and the Company may mitigate exposure to credit risk by requiring payments in advance. If collectability of substantially all consideration to which the Company is entitled under the contract is determined to be not probable, revenue is not recorded until collectability becomes probable at a later date. Revenue is recorded based on the transaction price excluding amounts collected on behalf of third parties, such as sales taxes collected and remitted to governmental authorities. Subscription and Returns Revenue Subscription and returns revenue primarily consist of contractually agreed upon fees paid for using the Company’s cloud-based solutions, which include tax calculation, preparing and filing transaction tax returns, compliance document management, and tax content subscription services. Under the Company’s subscription agreements, customers select a price plan that includes an allotted maximum number of transactions or number of jurisdictions over the subscription term. Unused transactions are not carried over to the customer’s next subscription term, and customers are not entitled to refunds of fees paid or relief from fees due in the event they do not use the allotted number of transactions. If customers exceed the maximum transaction level within their price plan, the Company will generally upgrade the customer to a higher transaction price plan or, in some cases, charge overage fees on a per transaction basis. Fees paid for subscription services to tax content vary depending on the volume of tax information accessible to the customer. The Company’s subscription arrangements do not provide the customer with the right to take possession of the software supporting the cloud-based application services. The Company’s standard subscription contracts are non-cancelable except where contract terms provide rights to cancel in the first 60 days of the contract term. Cancellations under the Company’s standard subscription contracts are not material, and do not have a significant impact on revenue recognized. Tax returns processing services include collection of tax data and amounts, preparation of compliance forms, and submission to taxing authorities. Returns processing services are primarily charged on a subscription basis for an allotted number of returns to process within a given time period. We earn SST revenue from participating state and local governments based on a percentage of the sales tax reported and paid. Revenue is recognized ratably over the contractual term of the arrangement, beginning on the date that the service is made available to the customer. The Company invoices its subscription customers for the initial term at contract signing and at each subscription renewal. Initial terms generally range from 12 to 18 months, and renewal periods are typically one year. Amounts that are contractually billable and have been invoiced, or which have been collected as cash, are initially recorded as deferred revenue or contract liabilities. While most of the Company’s customers are invoiced once at the beginning of the term, a portion of customers are invoiced semi-annually, quarterly, or monthly. Included in the total subscription fee for cloud-based solutions are non-refundable upfront fees that are typically charged to new customers. These fees are associated with work performed to set up a customer with the Company’s services, and do not represent a distinct good or service. Instead, the fees are included within the transaction price and allocated to the remaining performance obligations in the contract. The Company recognizes revenue for these fees in accordance with the revenue recognition for those performance obligations. Also included in subscription and returns revenue is interest income on funds held for customers. The Company uses trust accounts at FDIC-insured institutions to provide tax remittance services to customers and collect funds from customers in advance of remittance to tax authorities. After collection and prior to remittance, the Company earns interest on these funds. Professional Services Revenue The Company generates professional services revenue from providing tax analysis and services, including tax registrations, voluntary disclosure agreements, nexus studies, and backfiling services. Additionally, the Company provides configurations, data migrations, integration, and training for its subscriptions and returns products. The 2020 acquisitions of TTR and Business Licenses (see Note 5) expanded the scope of professional

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	3. Fair Value Measurements Assets and liabilities measured at fair value on a recurring basis T he following financial assets and liabilities are measured at fair value on a recurring basis. The fair values recognized in the accompanying consolidated balance sheets and the level within the fair value hierarchy in which the fair value measurements fall is as follows (in thousands): Fair Value Measurements Using Quoted Prices Significant in Active Other Significant Markets for Observable Unobservable Fair Identical Assets Inputs Inputs December 31, 2021 Value (Level 1) (Level 2) (Level 3) Money market funds $ 1,439,522 $ 1,439,522 $ — $ — Available-for-sale securities: U.S. treasury securities 370 370 — — Earnouts related to business combinations 113,978 — — 113,978 Fair Value Measurements Using Quoted Prices Significant in Active Other Significant Markets for Observable Unobservable Fair Identical Assets Inputs Inputs December 31, 2020 Value (Level 1) (Level 2) (Level 3) Money market funds $ 649,603 $ 649,603 $ — $ — Earnouts related to business combinations 34,501 — — 34,501 Earnout Liability Earnout liabilities recorded in connection with an acquisition accounted for as a business combination under ASC 805 are recorded at estimated fair value on a recurring basis. Business combinations included in the earnout liabilities table below are discussed in Note 5. Earnouts recorded in connection with asset acquisitions are recorded as earnout payments become known and are not remeasured on a recurring basis. As such, earnouts related to asset acquisitions, which are discussed in Note 7, are not included in these fair value disclosures. Earnout liabilities related to business combinations are classified as Level 3 liabilities because the Company uses unobservable inputs to value them, reflecting its assessment of the assumptions market participants would use to value these liabilities. Changes in the fair value of earnout liabilities related to business combinations are recorded in fair value changes in earnout liabilities and included in total other income (expense), net in the consolidated statements of operations. The Company estimates the fair value of earnout liabilities for business combinations using either probability-weighted discounted cash flows and Monte Carlo simulations or a scenario-based approach. The following table provides summary information of our assumptions used to calculate the estimated earnout liabilities related to 2021 and 2020 acquisitions (in thousands): Balance as of Balance as of Acquisition Year of Acquisition Earnout Target Method Earnout Period Discount Rate December 31, 2021 December 31, 2020 CrowdReason 2021 Specific revenue growth thresholds through October 2024, a cap of $30.0 million is available; to be settled in cash. Probability-weighted discounted cash flows and Monte Carlo simulation October 2024 3.5 % (a) $ 26,320 $ — Track1099 2021 Specific revenue growth thresholds through April 2023, with a cap of $12.5 million; to be settled in cash. Probability-weighted discounted cash flows and Monte Carlo simulation April 2023 4.0 % (a) 7,880 — Davo 2021 Specific revenue growth thresholds through March 2023, with no cap; to be settled in cash. Probability-weighted discounted cash flows and Monte Carlo simulation March 2023 7.0 % (a) 35,885 — TTR 2020 Specific revenue growth thresholds through December 2022, with cap of $26.4 million; to be settled in cash. Probability-weighted discounted cash flows and Monte Carlo simulation December 2022 15.0 % (a) 24,830 15,740 Business Licenses 2020 Achievement of certain performance metrics through November 2024, with cap of $20.7 million; to be settled in common stock. Scenario-based approach November 2024 4.8 % (b) 19,063 18,728 Balance end of period $ 113,978 $ 34,468 (a) The discount rate was calculated using the build-up method with a risk-free rate commensurate with the term of the earnout based on the equity, asset and revenue betas, size premium, and the Company’s specific risk premium, as well as the market risk premium using a bottom-up approach. (b) The discount rate was based on the Company's estimated credit yield. The Business Licenses earnout was assumed by management to have a high probability of achievement. The earnout liability as of December 31, 2020, also included a small balance related to 2019 acquisitions. The earnout period related to the acquisition of Indix ended in 2020 and the final payment was made in 2021. The earnout period associated with the acquisition of Portway International Inc. ended as of January 31, 2021, and did not result in any additional earnout payments due to not meeting the revenue targets. The Indix earnout liability is excluded from the balance as of December 31, 2020, in the table above. A reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the accompanying consolidated balance sheets using significant unobservable (Level 3) inputs, is as follows (in thousands): For the Year Ended December 31, 2021 2020 Earnout liabilities related to business combinations: Balance beginning of period $ 34,501 $ 13,808 Fair value recorded at acquisition 64,486 34,468 Measurement period adjustments 2,793 — Payments of earnout liabilities (33 ) (11,450 ) Fair value changes included in other expense (income), net 12,231 (2,325 ) Balance end of period $ 113,978 $ 34,501 Assets and liabilities measured at fair value on a non-recurring basis The Company’s non-financial assets and liabilities, which include goodwill, intangible assets, long-lived assets and deferred revenue, and the Company’s liabilities for the accrued purchase price related to acquisitions, are not required to be measured at fair value on a recurring basis. The estimation of fair value for these assets and liabilities requires the use of significant unobservable inputs, and as a result, the Company classifies these assets and liabilities as Level 3 within the fair value hierarchy. During the year ended December 31, 2021, assets acquired and liabilities assumed in business combinations, including trade accounts receivable, property and equipment, intangible assets, and deferred revenue, were measured at fair value on the date of the acquisition. In addition, certain operating lease right-of-use assets were measured at fair value on the date of acquisition or the date of lease commencement or modification, as applicable. There were no additional fair value measurements of these assets during 2021 or 2020, except as discussed in Note 5. In 2020, the Company vacated certain leased offices in the U.S. and Canada and did not expect to derive future economic benefits from the operating lease right-of-use assets and associated property and equipment. The associated carrying value of the U.S. leases was reduced to zero in accordance with ASC 360, resulting in a combined $0.5 million impairment in the year ended December 31, 2020. The Company intended to sublease its office in Toronto, Canada and recognized an additional impairment charge of $0.3 million in the year ended December 31, 2020, to write the carrying value of the operating lease right-of-use asset and associated property and equipment down to an estimated fair value. The fair value of the operating lease right-of-use asset and associated property and equipment was estimated using an income approach to convert market expectations of future sublease cash inflows and outflows to a single present value, which is a Level 3 measurement. The discount rate applied to the estimated future cash flows for the Toronto, Canada lease was 8.0%. The impairment charges are included in general and administrative expenses in the consolidated statements of operations. The vacated U.S. office leases were terminated in 2020 and the Canada lease was terminated during the second quarter of 2021, with no additional charge for impairment. Fair Value of Other Financial Instruments The Company has $977.5 million in principal amount of the 2026 Notes. See Note 10 for further details. The Company carries the 2026 Notes at par value less unamortized debt issuance costs on its consolidated balance sheet as of December 31, 2021, and presents the fair value for disclosure purposes only. The estimated fair value of the 2026 Notes, based on a market approach as of December 31, 2021, was approximately $909 million, which represents a Level 2 valuation estimate. The estimated fair value was determined based on the actual bids and offers of the 2026 Notes in an over-the-counter market on the last trading day of the year.

Balance Sheet Detail

Balance Sheet Detail	12 Months Ended
	Dec. 31, 2021
Balance Sheet Related Disclosures [Abstract]
Balance Sheet Detail	4. Balance Sheet Detail Property and equipment, net consisted of the following (in thousands): Useful December 31, December 31, Life (Years) 2021 2020 Computer equipment and software 3 to 5 $ 19,923 $ 15,749 Internally developed software 3 to 6 27,099 10,438 Furniture and fixtures 5 6,425 6,651 Office equipment 3 to 5 1,275 1,006 Leasehold improvements 1 to 10 30,046 29,928 84,768 63,772 Accumulated depreciation (38,304 ) (29,059 ) Property and equipment—net $ 46,464 $ 34,713 Depreciation expense was $12.4 million, $9.6 million, and $8.7 million, for the years ended December 31, 2021, 2020, and 2019, respectively. Prepaid expenses and other current assets consisted of the following (in thousands): December 31, December 31, 2021 2020 Licenses and subscriptions $ 14,511 $ 6,348 Prepaid and other current taxes 3,132 2,308 Deposits 3,746 4,570 Prepaid employee related expenses 2,780 1,516 Prepaid cloud computing implementation costs 1,708 340 Other 3,390 5,016 Total $ 29,267 $ 20,098 Accrued expenses consisted of the following (in thousands): December 31, December 31, 2021 2020 Accrued bonus $ 40,853 $ 29,518 Accrued partner commissions 13,088 9,173 Accrued payroll and related taxes 10,208 7,903 Employee stock purchase plan contributions 7,113 5,927 Accrued sales commissions 7,007 5,563 Contract liabilities 6,918 10,134 Accrued federal, state, local, and foreign taxes 3,926 4,338 Self-insurance reserves 2,401 1,563 Accrued interest payable 944 — Other 17,334 10,413 Total $ 109,792 $ 84,532

Acquisitions of Businesses

Acquisitions of Businesses	12 Months Ended
	Dec. 31, 2021
Business Combinations [Abstract]
Acquisitions of Businesses	5. Acquisitions of Businesses April 2021 Acquisition of Inposia On April 1, 2021, the Company acquired the outstanding equity of Inposia under a Share Purchase Agreement (the “Inposia Purchase”). Inposia is a German software company that delivers e-invoicing, digital tax reporting, and system and data integration to support digital transformation efforts and address real-time compliance requirements for businesses. Inposia will build upon Avalara’s existing e-invoicing capabilities in Brazil and India to support customers worldwide with real-time compliance. The Company accounted for the Inposia Purchase as a business combination. Acquisition-related costs of $1.5 million were primarily for legal and due-diligence related fees and were recorded in general and administrative expense, of which $1.0 million was incurred in the second half of 2020 and $0.5 million was incurred in 2021. The total consideration transferred related to this transaction was €31.8 million (or approximately $37.4 million using the exchange rate on April 1, 2021), consisting of net cash consideration of $14.5 million and 164,416 shares of the Company’s common stock paid at closing with an acquisition date fair value of $23.0 million. Net cash consideration consists of $12.2 million cash paid at closing, and a million cash deposit paid in the fourth quarter of 2020, offset by $0.2 million cash received by the Company in the third quarter of 2021 as a result of net working capital adjustments. A portion of shares issued are held in escrow as of December 31, 2021, and will be released to the Inposia shareholders during the nine and 18 months following the acquisition, subject to reduction for certain indemnification and other potential obligations of the Inposia shareholders. The shares held in escrow are considered issued and outstanding and are recorded in shareholders’ equity on the consolidated balance sheet as of December 31, 2021. Measurement period adjustments recognized during 2021 related primarily to updated estimated fair values for acquired intangible assets, deferred tax liabilities, and a net working capital adjustment. As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Cash paid at closing (net of amounts returned) $ 14,671 $ (215 ) $ 14,456 Fair value of common stock issued at closing 22,971 — 22,971 Total consideration $ 37,642 $ (215 ) $ 37,427 Fair values of the assets acquired and the liabilities assumed in the Inposia Purchase as of the acquisition date are provided in the following table (in thousands): As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Assets acquired: Cash and cash equivalents $ 1,264 $ — $ 1,264 Trade accounts receivable 1,767 — 1,767 Other current assets 268 — 268 Operating lease right-of-use assets 928 — 928 Property and equipment 98 — 98 Developed technology, customer relationships, and other intangibles 12,684 1,585 14,269 Goodwill 27,702 (1,182 ) 26,520 Other noncurrent assets 35 — 35 Total assets acquired 44,746 403 45,149 Liabilities assumed: Trade payables and accrued expenses 1,340 138 1,478 Deferred revenue 811 (1 ) 810 Other liabilities, noncurrent 106 — 106 Operating lease liabilities 928 — 928 Deferred tax liability 3,919 481 4,400 Total liabilities assumed 7,104 618 7,722 Net assets acquired $ 37,642 $ (215 ) $ 37,427 The carrying amount of trade accounts receivable acquired in the Inposia Purchase approximates the fair value. The fair value of deferred revenue was estimated utilizing a discount rate of 4.0% based on the Company’s estimated pre-tax cost of debt. The Company utilizes different valuation approaches and methodologies to determine the fair value of acquired intangible assets. The weighted-average amortization period for all intangibles acquired in the Inposia Purchase is 6.2 years. A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the Inposia Purchase are provided in the table below (in thousands): Intangible As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 1,585 $ 1,703 $ 3,288 Multi-period excess earnings-income approach 18.5 % 8 years Developed technology 9,572 — 9,572 Relief from royalty-income approach 18.5 % 6 years Noncompetition agreements 1,292 (118 ) 1,174 With-and-without valuation-income approach 21.0 % 3 years Tradename 235 — 235 Relief from royalty-income approach 18.5 % 3 years The excess of the purchase price over the net identified tangible and intangible assets is $26.5 million and has been recorded as goodwill, which includes synergies expected from the combined service offerings and the value of the assembled workforce. The goodwill is not expected to be deductible for tax purposes. For the period from the date of the Inposia Purchase through December 31, 2021, revenue was $6.0 million and pre-tax loss was $2.4 million from the Inposia business. April 2021 Acquisition of Davo On April 20, 2021, the Company acquired substantially all the assets of Davo under an Asset Purchase Agreement (the “Davo Purchase”). Davo helps emerging small businesses automate the daily and ongoing requirements for sales tax. As a result of the acquisition, Davo extends Avalara’s ability to provide integrated sales tax compliance processes to alleviate the burden of compliance on small businesses. The Company accounted for the Davo Purchase as a business combination. Acquisition-related costs of $0.1 million were primarily for legal and due-diligence related fees and were recorded in general and administrative expense. The total consideration transferred related to this transaction was $56.7 million, consisting of $23.5 million cash paid at close, a $0.3 million cash deposit paid in the first quarter of 2021, an acquisition holdback with a fair value upon acquisition of $2.6 million, and an earnout provision with a fair value upon acquisition of $30.3 million. The acquisition holdback represents an additional $2.6 million of cash to be paid Davo shareholders during the 18 months following the acquisition date, subject to reduction for certain indemnifications and other potential obligations of Davo shareholders. The earnout will be calculated as a multiple of certain performance metrics during the 12-month measurement periods ending March 31, 2022, and 2023, and there is not a stated minimum or maximum payment required under the earnout. Measurement period adjustments recognized during 2021 related primarily to updated estimated fair values for acquired intangible assets, the earnout liability, and working capital adjustments. As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Cash paid through closing $ 23,818 $ — $ 23,818 Fair value of earnout provision 28,620 1,718 30,338 Fair value of holdbacks 2,600 (9 ) 2,591 Total consideration $ 55,038 $ 1,709 $ 56,747 Fair values of the assets acquired and the liabilities assumed in the Davo Purchase as of the acquisition date are provided in the following table (in thousands): As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Assets acquired: Cash and cash equivalents $ 198 $ — $ 198 Funds held from customers 12,464 — 12,464 Trade accounts receivable 119 — 119 Other current assets 58 — 58 Operating lease right-of-use assets 46 — 46 Developed technology, customer relationships, and other intangibles 6,427 (1,776 ) 4,651 Goodwill 48,426 3,485 51,911 Other noncurrent assets 2 — 2 Total assets acquired 67,740 1,709 69,449 Liabilities assumed: Accrued expenses 117 — 117 Deferred revenue 75 — 75 Operating lease liabilities 46 — 46 Customer fund obligations 12,464 — 12,464 Total liabilities assumed 12,702 — 12,702 Net assets acquired $ 55,038 $ 1,709 $ 56,747 The carrying amount of trade accounts receivable and deferred revenue acquired in the Davo Purchase approximates the fair value. The Company utilizes different valuation approaches and methodologies to determine the fair value of acquired intangible assets. The weighted-average amortization period for all intangibles acquired in the Davo Purchase is 5.4 years. Intangible As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 4,350 $ (2,300 ) $ 2,050 Multi-period excess earnings-income approach and replacement cost method-cost approach 13.5 % 6 years Developed technology 1,800 150 1,950 Relief from royalty-income approach 13.5 % 5 years Noncompetition agreements 191 373 564 With-and-without valuation-income approach 15.5 % 5 years Tradename 86 1 87 Relief from royalty-income approach 13.5 % 1 year The excess of the purchase price over the net identified tangible and intangible assets is $51.9 million and has been recorded as goodwill, which includes synergies expected from the combined service offerings and the value of the assembled workforce. The goodwill is expected to be deductible for tax purposes. For the period from the date of the Davo Purchase through December 31, 2021, revenue was $2.2 million and pre-tax loss was $2.0 million from the Davo business. September 2021 Acquisition of 3CE On September 7, 2021, the company acquired substantially all the assets of 3CE under an Asset Purchase Agreement (the “3CE Purchase”). 3CE is a Canadian company that provides software and services for Harmonized System code classifications and verifications, primarily to government entities and logistics services providers. The acquisition will expand and improve Avalara’s Harmonized System classification content and provide a new self-service model to sell to the Company’s customers. The Company accounted for the 3CE purchase as a business combination. The total consideration related to this transaction is $ fair values of the assets acquired and the liabilities assumed in the 3CE Purchase as of the acquisition date include intangible assets of $3.7 million, primarily attributable to developed technology and customer relationships and goodwill of $7.1 million. October 2021 Acquisition of Track1099 On October 1, 2021, the Company acquired substantially all the assets of Track1099 under an Asset Purchase Agreement (the “Track1099 Purchase”). Track1099 provides online software and services for cost-effectively managing, e-filing, and e-delivering Internal Revenue Service forms, including Forms 1099, W-2, and W-9. Acquisition related costs of $0.1 million were primarily for legal and due-diligence related fees and were recorded in general and administrative expense. The total consideration related to this transaction was $48.8 million, consisting of $35.0 million cash paid at close, an acquisition holdback with a fair value upon acquisition of $5.0 million, and an earnout provision with a fair value upon acquisition of $8.8 million. The acquisition holdback represents an additional $5.0 million of cash to be paid to the sellers 27 months following the acquisition date, subject to reduction for certain indemnifications and other potential obligations of the sellers. The earnout for Track1099 is calculated based on certain billing performance metrics during the 12-month measurement periods ending April 30, 2022 and April 30, 2023, not to exceed $12.5 million in total or $6.25 million in each earnout period. Preliminary total consideration as of December 31, 2021, is presented below (in thousands): As of December 31, 2021 Cash paid through closing $ 35,000 Fair value of earnout provision 8,820 Fair value of holdbacks 4,984 Total consideration $ 48,804 Preliminary estimated fair values of the assets acquired and the liabilities assumed in the Track1099 Purchase as of the acquisition date are provided in the following table (in thousands): As of December 31, 2021 Assets acquired: Prepaid and other current assets $ 2 Developed technology, customer relationships, and other intangibles 5,850 Goodwill 42,962 Total assets acquired 48,814 Liabilities assumed: Current liabilities 1 Deferred revenue 9 Total liabilities assumed 10 Net assets acquired $ 48,804 The estimated fair values for acquired intangible assets are preliminary in nature. The estimated fair values for certain acquired intangibles, the earnout, and holdback are preliminary in nature and subject to adjustment when the necessary information is available to complete the valuation. The Company utilizes different valuation approaches and methodologies to determine the fair value of acquired intangible assets. A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the Track1099 Purchase are provided in the table below (in thousands): Intangible Assigned Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 3,200 Multi-period excess earnings-income approach 28.0 % 5 years Developed technology 1,250 Relief from royalty-income approach 28.0 % 2 years Noncompetition agreement 1,300 With-and-without valuation-income approach 30.0 % 5 years Tradename 100 Relief from royalty-income approach 28.0 % 2 years The excess of the purchase price over the net identified tangible and intangible assets is $43.0 million and has been recorded as goodwill, which includes synergies expected from the combined service offerings and the value of the assembled workforce. The goodwill is expected to be deductible for tax purposes. October 2021 Acquisition of CrowdReason and CorrelationAdvisors On October 18, 2021, the Company acquired substantially all the assets of CrowdReason, Limited Liability Company and CorrelationAdvisors, LLC under an Asset Purchase Agreement (the “CrowdReason Purchase”). CrowdReason is a technology services company that provides software applications, solutions, and services for property tax compliance. CorrelationAdvisors provides consulting services related to property valuation and property tax compliance. The Company accounted for the CrowdReason Purchase as a business combination. Acquisition-related costs of $0.2 million were primarily for legal and due-diligence related fees and were recorded in general and administrative expense. The total consideration transferred related to this transaction was $36.4 million, consisting of $8.3 million cash paid at close, acquisition holdbacks with a fair value upon acquisition of $1.7 million, and an earnout provision with a fair value upon acquisition of $26.3 million. The acquisition holdback represents an additional $1.7 million of cash to be paid to the sellers during the 18 months following the acquisition date, subject to reduction for certain indemnifications and other potential obligations of the sellers. The earnout is calculated as a multiple of revenue growth thresholds during the 12-month measurement periods ending October 31, 2022, 2023, and 2024, with the total purchase price, inclusive of earnouts, not to exceed $40.0 million. Preliminary total consideration as of December 31, 2021, is presented below (in thousands): As of December 31, 2021 Cash paid through closing $ 8,317 Fair value of earnout provision 26,320 Fair value of holdbacks 1,727 Total consideration $ 36,364 Preliminary estimated fair values of the assets acquired and the liabilities assumed in the CrowdReason As of December 31, 2021 Assets acquired: Current assets $ 1,426 Developed technology, customer relationships, and other intangibles 10,300 Goodwill 25,415 Total assets acquired 37,141 Liabilities assumed: Current liabilities 101 Deferred revenue and contract liabilities 676 Total liabilities assumed 777 Net assets acquired $ 36,364 The estimated fair values for acquired intangible assets are preliminary in nature. The estimated fair values for certain acquired intangibles, the earnout, and holdback are preliminary in nature and subject to adjustment when the necessary information is available to complete the valuation. The Company utilizes different valuation approaches and methodologies to determine the fair value of acquired intangible assets. A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the CrowdReason Purchase are provided in the table below (in thousands): Intangible Assigned Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 5,700 Multi-period excess earnings-income approach 18.0 % 5 to 8 years Developed technology 3,900 Relief from royalty-income approach 18.0 % 5 years Backlog 450 Multi-period excess earnings-income approach 15.0 % 1 year Noncompetition agreements 100 With-and-without valuation-income approach 20.0 % 5 years Tradename 150 Relief from royalty-income approach 18.0 % 2 years The excess of the purchase price over the net identified tangible and intangible assets is $25.4 million and has been recorded as goodwill, which includes synergies expected from the combined service offerings and the value of the assembled workforce. The goodwill is expected to be deductible for tax purposes. October 2020 Acquisition of Transaction Tax Resources On October 5, 2020, the Company acquired the outstanding equity of TTR under a Merger Agreement (the “TTR Merger”). TTR is a leading provider of tax content, research, consulting, and automation tools in the U.S., with products that include software solutions for companies and governments. As a result of the acquisition, the Company expanded its tax content, added new product offerings, and reached new customer segments. Acquisition-related costs of $1.0 million for the year ended December 31, 2020, were primarily for legal and due-diligence related fees and were recorded in general and administrative expense The total consideration related to this transaction was $370.1 million, consisting of $294.0 million in cash paid at closing, acquisition holdbacks with a fair value upon acquisition of $57.3 million, and an earnout provision with a fair value upon acquisition of $18.9 million. The acquisition holdbacks represent the present value of an additional $57.3 million of cash to be paid up to three years following the acquisition, subject to reduction for certain indemnifications and other potential obligations of the TTR shareholders, discounted utilizing a risk-free discount rate of 0.13%. The earnout is payable to TTR’s founder and shareholder no later than February 2023. The maximum earnout payment is $26.4 Measurement period adjustments recognized during 2021 related to the finalization of the estimated fair values for customer relationships, contract backlog, and earnout liability, and a net working capital adjustment. As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Cash paid at closing $ 294,017 $ — $ 294,017 Fair value of holdbacks 57,477 (217 ) 57,260 Fair value of earnout provision 15,740 3,131 18,871 Total consideration $ 367,234 $ 2,914 $ 370,148 Estimated fair values of the assets acquired and the liabilities assumed in the TTR Merger as of the acquisition date and including measurement period adjustments are provided in the following table (in thousands): As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Assets acquired: Cash and cash equivalents $ 2,294 $ — $ 2,294 Trade accounts receivable 5,966 — 5,966 Other current assets 93 — 93 Operating lease right-of-use assets 1,760 — 1,760 Property and equipment 848 — 848 Developed technology, customer relationships, and other intangibles 49,000 (7,500 ) 41,500 Goodwill 327,039 8,526 335,565 Total assets acquired 387,000 1,026 388,026 Liabilities assumed: Trade payables and accrued expenses 731 — 731 Deferred revenue 8,500 — 8,500 Operating lease liabilities 1,760 — 1,760 Deferred tax liability 8,775 (1,888 ) 6,887 Total liabilities assumed 19,766 (1,888 ) 17,878 Net assets acquired $ 367,234 $ 2,914 $ 370,148 The carrying amount of trade accounts receivable acquired in the TTR Merger was $7.2 million and was recorded at $6.0 million on the date of acquisition to approximate the fair value. The fair value of deferred revenue was estimated using the income approach, utilizing a bottom-up method that estimated the costs required to support the remaining obligations plus an assumed profit margin, and discounted to present value utilizing a risk-adjusted discount rate of 3.5%. The Company utilizes different valuation approaches and methodologies to determine the fair value of acquired intangible assets. The weighted-average amortization period for all intangibles acquired in the TTR Merger is 4.7 years. The weighted-average amortization period for developed technology intangibles acquired in the TTR Merger is 4.0 years. A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the TTR Merger are provided in the table below (in thousands): Intangible As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 26,000 $ (5,000 ) $ 21,000 Multi-period excess earnings-income approach 18% 6 years Developed technology 9,600 — 9,600 Relief from royalty-income approach and replacement cost method-cost approach 17% to 18% 3 to 6 years Tradename 5,800 — 5,800 Relief from royalty-income approach 17% 2 years Contract backlog 5,800 (2,500 ) 3,300 Multi-period excess earnings-income approach 17% 3 years Noncompetition agreements 1,800 — 1,800 With-and-without valuation-income approach 19% 5 years The excess of the purchase price over the net identified tangible and intangible assets is $335.6 million and has been recorded as goodwill, which includes synergies expected from the combined service offerings and the value of the assembled workforce. The goodwill is not expected to be deductible for tax purposes. A portion of the acquisition holdback liability in the amount of $19.9 million was settled in 2021, comprised of $0.8 million in the first quarter and $18.8 million paid in the second quarter. For the period from the date of the TTR acquisition through December 31, 2020, revenue was $4.5 million and pre-tax loss was $3.2 million from the TTR business. The pre-tax loss includes $3.5 million of amortization expense from the intangible assets acquired. TTR business activity is included in the consolidated financial statements of Avalara and are immaterial to our operations. November 2020 Acquisition of Business Licenses On November 5, 2020, the Company acquired substantially all of the assets of Business Licenses under an Asset Purchase Agreement (“the Business Licenses Purchase”). Business Licenses is a leading provider of license content, software, management, and services that automate and streamline business license compliance for companies of all sizes. As a result of the acquisition, the Company expanded its product offerings to include complementary compliance solutions beyond tax, such as business licenses and registrations. The Company accounted for the Business Licenses Purchase as a business combination. The total consideration transferred related to this transaction was $93.3 million, consisting of $64.8 million paid in cash at closing, an acquisition holdback with a fair value upon acquisition of $11.1 million, and an earnout provision with a fair value upon acquisition of $17.4 million. The acquisition holdback represents the present value of an additional $11.1 million of cash to be paid after 18 months to Business Licenses’ shareholders, subject to reduction for certain indemnification obligations, discounted utilizing a risk-free discount rate of 0.13%. The maximum earnout payment of up to $20.7 million will be paid, in shares of the Company’s common stock, to Business Licenses’ shareholders following the achievement of certain Business Licenses operating performance metrics during the four years following the acquisition. The potential amount of all future payments that could be required under the earnout is between $0 and $20.7 million. The earnout was originally recognized at fair value at the date of the business combination and is adjusted to fair value quarterly (see Note 3). Measurement period adjustments recognized during 2021 related to the finalization of the estimated fair value of the earnout liability and a net working capital adjustment. As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Cash paid at closing $ 64,812 $ — $ 64,812 Fair value of holdbacks 11,415 (306 ) 11,109 Fair value of earnout provision 18,728 (1,328 ) 17,400 Total consideration $ 94,955 $ (1,634 ) $ 93,321 Estimated fair values of the assets acquired and the liabilities assumed in the Business Licenses Purchase as of the acquisition date are provided in the following table (in thousands): As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Assets acquired: Cash and cash equivalents $ 120 $ — $ 120 Trade accounts receivable 1,326 — 1,326 Customer fund assets 1,074 — 1,074 Other current assets 101 — 101 Operating lease right-of-use assets 1,644 — 1,644 Property and equipment 87 — 87 Developed technology, customer relationships, and other intangibles 19,525 — 19,525 Goodwill 73,775 (1,634 ) 72,141 Other noncurrent assets 31 — 31 Total assets acquired 97,683 (1,634 ) 96,049 Liabilities assumed: Accrued expenses 56 — 56 Customer fund obligations 1,028 — 1,028 Operating lease liabilities 1,644 — 1,644 Total liabilities assumed 2,728 — 2,728 Net assets acquired $ 94,955 $ (1,634 ) $ 93,321 The carrying amount of trade accounts receivable acquired in the Business Licenses Purchase approximates the fair value. The Company utilizes different valuation approaches and methodologies to determine the fair value of acquired intangible assets. The weighted-average amortization period for all intangibles acquired in the Business Licenses Purchase is 5.3 years. The weighted-average amortization period for developed technology intangibles acquired in the Business Licenses Purchase is 3.1 years. A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the Business Licenses Purchase are provided in the table below (in thousands): Intangible Assigned Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 15,000 Multi-period excess earnings-income approach 19.5% 6 years Developed technology 3,625 Relief from royalty-income approach and replacement cost method-cost approach 19.5% 1 to 5 years Noncompetition agreements 500 With-and-without valuation-income approach 19.5% 5 years Tradename 400 Relief from royalty-income approach 19.5% 1 year The excess of the purchase price over the net identified tangible and intangible assets is $72.1 million and has been recorded as goodwill, which includes synergies expected from the combined service offerings and the value of the assembled workforce. The goodwill is expected to be deductible for tax purposes. For the period from the date of the Business Licenses acquisition through December 31, 2020, revenue was $1.8 million and pre-tax loss was $0.6 million from the Business Licenses business. The pre-tax loss includes $0.7 million of amortization expense from the intangible assets acquired. Business Licenses business activity is included in the consolidated financial statements of Avalara and are immaterial to our operations. December 2020 Acquisition of Impendulo On December 1, 2020, the Company acquired the shares of Impendulo (“the Impendulo Purchase”). Impendulo is a London-based provider of insurance tax compliance solutions and offers insurance tax compliance management technology and services, specializing in support for multi-national insurance companies. With the acquisition of Impendulo, the Company expands its product offerings to include insurance premium tax compliance. The Company accounted for the Impendulo Purchase as a business combination. The total consideration transferred related to this transaction was $14.0 million, consisting of $11.7 million paid in cash at closing, $1.2 million paid in the Company’s common stock, and an additional $1.1 million that was paid in the first quarter of 2021 based on final revenue metrics achieved up to the date of acquisition. Measurement period adjustments of $0.4 million were recognized in the first quarter of 2021 relate to the finalization of the net working capital adjustment. Fair values of the assets acquired and the liabilities assumed in the Impendulo Purchase as of the acquisition date are provided in the following table (in thousands): As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Assets acquired: Cash and cash equivalents $ 1,347 $ — $ 1,347 Trade accounts receivable 371 — 371 Other assets 147 — 147 Developed technology, customer relationships, and other intangibles 3,617 — 3,617 Goodwill 10,217 425 10,642 Total assets acquired 15,699 425 16,124 Liabilities assumed: Trade payables and accrued expenses 663 — 663 Deferred revenue and contract liabilities 694 — 694 Deferred tax liability 745 — 745 Total liabilities assumed 2,102 — 2,102 Net assets acquired $ 13,597 $ 425 $ 14,022 The carrying amount of trade accounts receivable acquired in the Impendulo Purchase approximates the fair value. The Company utilizes different valuation approaches and methodologies to determine the fair value of acquired intangible assets. The weighted-average amortization period for all intangibles acquired in the Impendulo Purchase is 5.9 years. A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the Impendulo Purchase are provided in the table below (in thousands): Intangible Assigned Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationship $ 2,964 Multi-period excess earnings-income approach 20% 6 years Developed technology 616 Relief from royalty-income approach 20% 6 years Tradename 37 Relief from royalty-income approach 20% 1 year The excess of the purchase price over the net identified tangible and intangible assets is $10.6 million and has been recorded as goodwill, which includes synergies expected from the combined service offerings and the value of the assembled workforce. The goodwill is not expected to be deductible for tax purposes. For the period from the date of the Impendulo acquisition through December 31, 2020, revenue was $0.2 million and pre-tax loss was $0.1 million from the Impendulo business. The pre-tax loss includes $0.1 million of amortization expense from the intangible assets acquired. Business Licenses business activity is included in the consolidated financial statements of Avalara and is immaterial to our operations. January 2019 Acquisition of Compli On January 22, 2019, the Company completed the acquisition of substantially all the assets of Compli under an Asset Purchase Agreement (the “Compli Purchase”). Compli is a provider of compliance services, technology, and software to producers, distributors, and importers of beverage alcohol in the United States. The Company accounted for the Compli Purchase as a business combination. As a result of the acquisition, the Company expanded its ability to provide transaction tax solutions and content for the beverage alcohol industry. The transaction costs associated with the acquisition were not material. The total consideration transferred related to this transaction was $17.1 million, consisting of $11.8 million paid in cash at closing, an additional $1.6 million of cash to be paid out after 12-months, and an earnout provision fair valued upon acquisition at $3.8 million. The earnout provision is for a one-time payment and has a maximum payout of $4.0 million based on revenue recognized by the Company from the acquired operating assets for the 12 month period ending January 31, 2020. The earnout was originally recognized at fair value at the date of the business combination and $4.0 million was paid in the first quarter of 2020. The excess of the purchase price over the net identified tangible and intangible assets of $12.8 million has been recorded as goodwill, which includes synergies expected from the combined service offerings and the value of the assembled workforce. The goodwill is expected to be deductible for tax purposes. February 2019 Acquisition of Indix On February 6, 2019, the Company completed the acquisition of substantially all the assets of Indix under an Asset Purchase Agreement (the “Indix Purchase”). Indix is an artificial intelligence company providing comprehensive product descriptions for more than o

Revenues

Revenues	12 Months Ended
	Dec. 31, 2021
Revenue From Contract With Customer [Abstract]
Revenues	6. Revenues The Company’s revenue recognition accounting policy follows guidance from ASC 606, Revenue from Contracts with Customers (“ASC 606”), see Note 2 for further discussion Disaggregation of Revenue The following table disaggregates revenue generated within the United States (“U.S.”) from revenue generated from customers outside of the U.S. Revenue for transaction tax compliance in the U.S. is further disaggregated based on the solutions or services purchased by customers. Total revenues consisted of the following (in thousands): For the Year Ended December 31, 2021 2020 2019 Revenue (U.S.): Subscription and returns Tax calculations $ 349,430 $ 257,680 $ 203,584 Tax returns and compliance management 233,420 178,318 127,815 Interest income on funds held from customers 769 829 3,213 Total subscription and returns 583,619 436,827 334,612 Professional services 59,514 32,474 24,399 Total revenue (U.S.) 643,133 469,301 359,011 Total revenue (non-U.S.) 55,844 31,268 23,410 Total revenue $ 698,977 $ 500,569 $ 382,421 Disclosures Related to Contracts with Customers Timing may differ between the satisfaction of performance obligations and the invoicing and collection of amounts related to contracts with customers. Liabilities are recorded for amounts that are collected in advance of the satisfaction of performance obligations. To the extent a contract exists, as defined by ASC 606, these liabilities are classified by the Company as current and non-current deferred revenue. To the extent that a contract does not exist, as defined by ASC 606 (e.g., customer agreements with non-standard termination rights), these liabilities are classified as contract liabilities. Contract liabilities are transferred to deferred revenue at the point in time when the criteria that establish the existence of a contract are met. Contract Liabilities A summary of the activity impacting the contract liabilities during the years ended December 31, 2021, and 2020 is presented below (in thousands): For the Year Ended December 31, 2021 2020 Contract liabilities: Balance beginning of period $ 10,134 $ 5,197 Contract liabilities transferred to deferred revenue (21,255 ) (11,151 ) Addition to contract liabilities 18,039 16,088 Balance end of period $ 6,918 $ 10,134 As of December 31, 2021, contract liabilities are expected to be transferred to deferred revenue within the next 12 months and therefore are included in accrued expenses on the consolidated balance sheets. Deferred Revenue A summary of the activity impacting deferred revenue balances during the years ended December 31, 2021, and 2020 is presented below (in thousands): For the Year Ended December 31, 2021 2020 Deferred revenue: Balance beginning of period $ 209,690 $ 161,241 Revenue recognized (698,977 ) (500,569 ) Additional amounts deferred 772,242 549,018 Balance end of period $ 282,955 $ 209,690 As of December 31, 2021, $280.8 million of deferred revenue is expected to be recognized within the next 12 months and is included in current liabilities on the consolidated balance sheets. The remaining amount of deferred revenue is included in noncurrent liabilities and is expected to be recognized within the next 18 months. Assets Recognized from the Costs to Obtain Contracts with Customers Assets are recognized for the incremental costs of obtaining a contract with a customer if the benefit of those costs is expected to be longer than one year. These deferred commissions are amortized over an expected period of benefit of generally six years. A summary of the activity impacting the deferred commissions during the years ended December 31, 2021, and 2020 is presented below (in thousands): For the Year Ended December 31, 2021 2020 Deferred commissions: Balance beginning of period $ 50,870 $ 38,416 Additional commissions deferred 32,721 23,935 Amortization of deferred commissions (15,072 ) (11,481 ) Balance end of period $ 68,519 $ 50,870 As of December 31, 2021, $16.4 million of deferred commissions are expected to be amortized within the next 12 months and therefore are included in current assets on the consolidated balance sheets. The remaining amount of deferred commissions are included in noncurrent assets. There were no impairments of assets related to deferred commissions during the year ended December 31, 2021 , or 2020 . There were no assets recognized related to the costs to fulfill contracts during the year ended December 31, 2021 , or 2020 as these costs were not material. Remaining Performance Obligations Contracts with customers include amounts allocated to performance obligations that will be satisfied at a later date. These amounts include deferred revenue that has been invoiced and non-cancellable amounts that will be invoiced and recognized as revenue in future periods. the remaining performance obligations to which enforceable rights exist are $369.2 million, of which $348.4 million is expected to be recognized as revenue over the next 12 months with the remaining amount thereafter. Of the remaining performance obligations as of December 31, 2021, $86.2 million relates to non-cancellable amounts that have not yet been invoiced, of which $67.6 million is expected to be recognized as revenue over the next 12 months with the remaining amount thereafter.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	7. Intangible Assets Intangible assets consisted of the following (in thousands): December 31, 2021 Average Useful Life (Years) Gross Accumulated Amortization Net Backlog 3 $ 4,500 $ (1,816 ) $ 2,684 Customer relationships 3 to 10 75,188 (23,795 ) 51,393 Developed technology (1) 3 to 8 72,723 (37,333 ) 35,390 Noncompetition agreements 3 to 5 6,452 (1,725 ) 4,727 Tradename and trademarks 1 to 4 7,267 (4,643 ) 2,624 $ 166,130 $ (69,312 ) $ 96,818 (1 ) Developed technology intangible assets include IPR&D of $0.4M as of December 31, 2021, which is not subject to amortization. December 31, 2020 Average Useful Life (Years) Gross Accumulated Amortization Net Backlog 3 $ 5,800 $ (937 ) $ 4,863 Customer relationships 3 to 10 64,302 (14,890 ) 49,412 Developed technology (1) 3 to 8 52,144 (27,646 ) 24,498 Noncompetition agreements 3 to 5 3,062 (766 ) 2,296 Tradename and trademarks 1 to 4 6,679 (1,235 ) 5,444 $ 131,987 $ (45,474 ) $ 86,513 (1 ) Developed technology intangible assets include IPR&D of $0.6M as of December 31, 2020, which is not subject to amortization. Finite-lived intangible assets are amortized over their estimated useful life. Finite-lived intangible assets amortization expense was $24.1 million, $10.7 million, and $7.1 million for the years ended December 31, 2021, 2020, and 2019, respectively. Future amortization expense as of December 31, 2021, related to these finite-lived intangible assets subject to amortization is expected to be as follows (in thousands): Years Ending December 31 2022 $ 27,230 2023 22,026 2024 17,285 2025 14,319 2026 10,959 Thereafter 4,599 $ 96,418 Acquisitions of finite-lived intangible assets In May 2018, the Company acquired developed technology to facilitate cross-border transactions (e.g., tariffs and duties), from Tradestream Technologies Inc. and Wise 24 Inc. (the “Sellers”) for cash and common stock. This acquisition was accounted for as an asset acquisition. Total consideration for the purchase includes an earnout computed on future billings recognized by the Company over the six years Through December 31, 2021, the sellers have earned approximately $2.2 million under the earnout provision since the acquisition date. An earnout liability of $0.6 million was recorded within the current portion of accrued earnout liabilities as of December 31, 2021, for the earnout period ending December 31, 2021, and is expected to be paid in cash to the sellers in the first quarter of 2022. Goodwill Changes in the carrying amount of goodwill are summarized as follows (in thousands): Balance—December 31, 2019 $ 101,224 Additions - 2020 acquisitions (1) 411,031 Cumulative translation adjustments 979 Balance—December 31, 2020 513,234 Measurement period adjustment - 2020 acquisitions (1) 7,317 Additions - 2021 acquisitions (1) 153,876 Cumulative translation adjustments (2,046 ) Balance—December 31, 2021 $ 672,381 (1) See Note 5 for measurement period adjustment and additions details Goodwill is tested for impairment annually on October 31 at the reporting unit level or whenever circumstances occur indicating goodwill might be impaired. The impairment test involves comparing the fair value of each reporting unit to its carrying value, including goodwill. Fair value reflects the price a market participant would be willing to pay in a potential sale of the reporting unit. If the fair value exceeds the carrying value, the Company will conclude that no goodwill impairment has occurred. If the carrying value of the reporting unit exceeds its fair value, the Company will recognize an impairment loss in an amount equal to the excess, not to exceed the carrying value. The Company has three reporting units for goodwill impairment testing consisting of its U.S., European, and Brazilian operations. As part of the Company’s annual impairment test, a qualitative impairment test was performed for the Company’s U.S. reporting unit. The Company concluded it is more likely than not that the fair value of the reporting unit exceeds its carrying value. A quantitative impairment test was performed for the Company’s European reporting unit. Upon completion, the fair value of the European reporting unit was in excess of the carrying value. When following a quantitative approach, the Company measures the fair value of its reporting units using a combination of a discounted cash flow approach and the market valuation approach using publicly traded company multiples in similar businesses, which are Level 3 measurements. This analysis requires significant judgments, including estimation of future cash flows, which is dependent on internal forecasts, determination of the Company’s discount rate, which is risk-adjusted to reflect the specific risk profile of the reporting unit being tested, and determination of revenue multiples, which are based on guideline public company multiples and adjusted for the specific size and risk profile of the reporting unit. The discount rate used in the Company’s most recent annual impairment test was 25%. The Company had no goodwill associated with the Brazilian reporting unit in 2021, 2020, and 2019. The Company had $17.6 million of accumulated goodwill impairment as of December 31, 2021, and 2020, which is associated with the Brazilian reporting unit and was recognized in the years ended December 31, 2017, and 2018.

Leases

Leases	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Leases	8. Leases The Company has non-cancelable operating leases primarily for office facilities in the United States, Brazil, Europe, and India that expire through 2029. The remaining operating leases are primarily comprised of leases of vehicles, office equipment, and servers. As of December 31, 2021, the leases have remaining terms of 0.2 to 7.8 years An impairment of the Company’s operating lease right-of-use assets and property and equipment of $0.8 million was recorded in 2020 (see Note 3). The following table presents future lease payments for long-term operating leases as of December 31, 2021 (in thousands): Period Operating Lease Commitments 2022 $ 14,824 2023 14,121 2024 12,767 2025 10,117 2026 6,789 Thereafter 8,288 Total 66,906 Less: Imputed interest (9,839 ) Total operating lease liabilities (1) $ 57,067 (1) Future lease payments have not been reduced by future sublease receipts of $0.8 million due under noncancelable subleases. As of December 31, 2021, the Company had two operating leases for additional office space that had not yet commenced. Future non-cancelable lease payments associated with these agreements total $6.3 million, beginning in the first quarter of 2022 and are payable over lease terms of 2.5 and 5.9 years. The following table presents supplemental balance sheet information related to operating leases recorded as of December 31, 2021, and 2020: December 31, 2021 December 31, 2020 Weighted average remaining lease term (in years) 5.0 5.8 Weighted average discount rate 6.5 % 6.6 % The components of lease expense for the years ended December 31, 2021, 2020 and 2019 were as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Operating lease costs $ 13,501 $ 12,766 $ 9,329 Variable lease costs 3,617 2,948 2,562 Short-term lease costs 846 1,722 1,065 Sublease income (1,541 ) (1,534 ) (1,448 ) Total lease cost, net $ 16,423 $ 15,902 $ 11,508

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	9. Commitments and Contingencies Commitments The Company has purchase commitments primarily related to network infrastructure, hosting services, and software licenses that extend up to four years beyond December 31, 2021. The Company’s obligation for future payments under these contracts is $45.6 million, $32.2 million, $26.0 million, and $10.6 million for the years ending December 31, 2022, 2023, 2024, and 2025, respectively. Contingencies Loss contingencies may arise in connection with the ordinary conduct of the Company’s business activities. The Company considers all loss contingencies on a quarterly basis and based on known facts assesses whether potential losses are considered reasonably possible, probable, and estimable. The Company establishes an accrual for loss contingencies when the loss is both probable and reasonably estimable. If the estimated loss is a range of potential outcomes and there is no better estimate within the range, management accrues the amount at the low end of the range. These accruals represent management’s estimate of probable losses and, in such cases, there may be an exposure to loss in excess of the amounts accrued. Significant judgment is required to determine both likelihood of there being a probable loss and the estimated amount of a loss. If a loss contingency is not both probable and reasonably estimable, the Company does not establish an accrual, but will evaluate other disclosure requirements and continue to monitor the matter for developments that would make the loss contingency both probable and reasonably estimable. The ultimate outcome of any litigation relating to a loss contingency is uncertain and, regardless of outcome, litigation can have an adverse impact on the Company because of defense costs, negative publicity, diversion of management resources and other factors. In its standard subscription agreements, the Company has agreed to indemnification provisions with respect to certain matters. Further, from time to time, the Company has also assumed indemnification obligations through its acquisition activity. These indemnification provisions can create a liability to the Company if its services do not appropriately calculate taxes due to tax jurisdictions, or if the Company is delinquent in the filing of returns on behalf of its customers. Although the Company’s agreements have disclaimers of warranties that limit its liability (beyond the amounts the Company agrees to pay pursuant to its indemnification obligations and guarantees, as applicable), a court could determine that such disclaimers and limitations are unenforceable as a matter of law and hold the Company liable for certain errors. Further, in some instances the Company has negotiated agreements with specific customers or assumed agreements in connection with the Company’s acquisitions that do not limit this liability or disclaim these warranties. It is not possible to reasonably estimate the potential loss under these indemnification arrangements.

Debt

Debt	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Debt	10. Debt Convertible Senior Notes In August 2021, the Company completed a private offering of $977.5 million principal amount of 0.25% convertible senior notes due 2026. The 2026 Notes are unsecured obligations and bear interest at a fixed rate of 0.25% per annum, payable semi-annually in arrears on February 1 and August 1 of each year, commencing on February 1, 2022. The 2026 Notes will mature on August 1, 2026, unless earlier converted, redeemed, or repurchased. The Company incurred $17.6 million of debt issuance costs in connection with the offering of the 2026 Notes, consisting of the initial purchasers’ commissions and legal, accounting, and other direct costs of the offering. The total proceeds from the offering, net of the debt issuance costs, were $959.9 million. The Company used $75.3 million of the net proceeds from the sale of the 2026 Notes to pay the premiums of the capped call options described further below. The Company may not redeem the 2026 Notes prior to August 6, 2024. The Company may redeem all or any portion of the 2026 Notes, at the Company’s option, on or after August 6, 2024, through the 41st scheduled trading day immediately prior to the maturity date, if the common stock price is at least 130% of the conversion price then in effect for at least 20 of any 30 consecutive trading day period. The Company may redeem all or part of the 2026 Notes at a redemption price equal to the principal amount plus accrued and unpaid interest to, but excluding, the redemption date, with not less than 50 nor more than 60 scheduled trading days’ notice to holders. The 2026 Notes are convertible at an initial conversion rate of 4.1940 shares of common stock per $1,000 principal amount of 2026 Notes, which is equivalent to an initial conversion price of approximately $238.44 per share of common stock. The conversion rate is subject to customary adjustments for certain events as described in the indenture governing the 2026 Notes. The Company may settle the conversion option obligation with cash, shares of the Company’s common stock, or any combination of cash and shares of the Company’s common stock. On or after February 1, 2026, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders of the 2026 Notes may convert their notes at their option. Prior to the close of business on the business day immediately preceding February 1, 2026, the 2026 Notes are convertible at the option of the holders of such notes only under the following circumstances: • during any calendar quarter commencing after the quarter ending on December 31, 2021 (and only during such calendar quarter), if the Company’s common stock price exceeds 130% of the conversion price for at least 20 trading days during the 30 consecutive trading days at the end of the prior calendar quarter; • during the five business days after any five consecutive trading days in which the trading price per $1,000 Notes was less than 98% of the product of the closing sale price of the Company’s common stock and the then current conversion rate; • upon the occurrence of specified corporate events; or • if the Company calls any or all 2026 Notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date, but only with respect to the notes called for redemption. Upon the occurrence of a make‑whole fundamental change or the exercise of the Company’s redemption option, the Company will, under certain circumstances, increase the applicable conversion rate for a holder that elects to convert its 2026 Notes. As of December 31, 2021 , none of the conditions of the 2026 Notes to early convert have been met. As discussed in Note 2, the Company early adopted ASU No. 2020‑06 as of January 1, 2021, and concluded that the 2026 Notes will be accounted for as debt, with no bifurcation of the embedded conversion feature. Debt issuance costs were recorded as a direct deduction from the related liability in the consolidated balance sheet and are amortized to interest expense over the term of the 2026 Notes. The effective interest rate for the 2026 Notes is 0.62%. The net carrying amount of the 2026 Notes was as follows: December 31, 2021 (in thousands) Principal $ 977,500 Unamortized debt issuance costs (16,241 ) Net carrying amount $ 961,259 The following table sets forth the interest expense recognized related to the 2026 Notes: For the Year Ended December 31, 2021 (in thousands) Contractual interest expense $ 944 Amortization of debt issuance costs 1,367 Total interest expense related to 2026 Notes $ 2,311 Capped Call Transactions In connection with the offering of the 2026 Notes, the Company purchased capped calls from certain financial institutions with respect to its common stock. The capped calls each have an initial strike price of $238.44 per share of the Company’s common stock, which corresponds to the initial conversion price of the 2026 Notes. The capped calls each have an initial cap price of $323.30 per share and expire in incremental components on each trading date beginning on June 4, 2026, and ending on July 30, 2026. The capped calls are intended to offset potential dilution to the Company’s common stock or offset any cash payments the Company is required to make in excess of the principal amount, as the case may be, with such reduction or offset subject to the cap price. The capped calls are subject to adjustments for certain corporate events and standard anti-dilution provisions. The Company paid an aggregate amount of $75.3 million for the capped calls, covering approximately 4.1 million shares of the Company’s common stock. As the capped calls are both legally detachable and separately exercisable from the 2026 Notes, the Company accounts for the capped call s separately from the 2026 Notes. The capped call s are indexed to the Company’s own common stock and classified in stockholders’ equity. As such, the premiums paid for the capped call s have been included as a net reduction to additional paid-in capital in the consolidated balance sheet.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2021
Stockholders Equity Note [Abstract]
Shareholders' Equity	11. Shareholders’ Equity Authorized Capital—Common Stock and Preferred Stock The Company is authorized to issue two classes of stock designated as common stock and preferred stock. The Company’s total authorized capital stock is 620,000,000 shares, consisting of 600,000,000 shares of common stock, $0.0001 par value per share, and 20,000,000 shares of undesignated preferred stock, $0.0001 par value per share. In June 2018, the Company completed an initial public offering (“IPO”), in which the Company sold 8,625,000 shares of its common stock, including the full exercise of the underwriters’ option to purchase 1,125,000 additional shares of common stock, at the initial price to the public of $24.00 per share. The Company received net proceeds of $192.5 million, after deducting underwriting discounts and commissions and before deducting offering expenses paid and payable by the Company of $3.4 million. In June 2019, the Company completed a public offering, in which the Company sold 4,133,984 shares of its common stock, including the full exercise of the underwriters’ option to purchase 539,215 additional shares of common stock, at a price of $69.40 per share. The Company received net proceeds of $274.7 million, after deducting underwriting discounts and commissions and before deducting offering expenses paid and payable by the Company of $1.2 million. In August 2020, the Company completed a public offering, in which the Company sold 4,527,558 shares of its common stock, including the full exercise of the underwriters’ option to purchase 590,551 additional shares of common stock, at a price of $127.00 per share. The Company received net proceeds of $556.3 million, after deducting underwriting discounts and commissions and before deducting offering expenses paid and payable by the Company of $0.7 million.

Equity Incentive Plans

Equity Incentive Plans	12 Months Ended
	Dec. 31, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity Incentive Plans	12. Equity Incentive Plans The Company has stock-based compensation plans that provide for the award of equity incentives, including stock options, stock awards, RSUs, PSUs, and purchase rights. As of December 31, 2021 The total number of shares of common stock reserved for issuance under the 2018 Plan is equal to (1) 5,315,780 shares plus (2) any shares subject to outstanding awards under the 2006 Plan as of June 14, 2018 that subsequently cease to be subject to such awards. The available shares automatically increase each January 1, beginning January 1, 2019, by the lesser of (i) 5% of the aggregate number of shares of common stock outstanding on December 31st of the immediately preceding calendar year (rounded up to the nearest whole share) and (ii) an amount determined by the Company’s Board of Directors. As of December 31, 2021 As of December 31, 2021 In 2019, the Company amended its Outside Director Compensation Policy to modify the vesting provisions for nonemployee director awards in the event of certain terminations of service. The modification resulted in an acceleration of share-based compensation expense for nonemployee director awards in the third quarter of 2019. Stock-Based Compensation The Company recognized total stock-based compensation cost related to equity incentive awards as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Stock-based compensation cost: Stock options $ 11,966 $ 15,402 $ 16,489 Restricted stock units 57,116 29,181 14,585 Performance share units 16,011 — — Employee stock purchase plan 4,595 3,987 3,326 Total stock-based compensation cost $ 89,688 $ 48,570 $ 34,400 The amount of stock-based compensation cost above capitalized to internally developed software and cloud computing arrangements in accordance with the accounting guidance for internal-use software was $1.6 million , $0.4 million, and $0.1 million for the years ended December 31, 2021, 2020, and 2019 respectively Stock Options The following table summarizes stock option activity for the Company’s stock-based compensation plans for 2021: Weighted Weighted Average Aggregate Average Remaining Intrinsic Exercise Contractual Value Shares Price Life (in Years) (in thousands) Options outstanding as of January 1, 2021 3,537,014 $ 28.17 6.89 $ 483,577 Options granted — $ — Options exercised (1,223,395 ) $ 17.80 Options cancelled or expired (34,830 ) $ 42.24 Options outstanding as of December 31, 2021 2,278,789 $ 33.52 6.30 $ 217,824 Options exercisable as of December 31, 2021 1,753,067 $ 27.80 5.97 $ 177,609 A summary of options outstanding and vested as of December 31, 2021 Options Outstanding Options Vested and Exercisable Exercise Number Weighted Average Number Vested Weighted Average Prices Outstanding Life (in Years) and Exercisable Life (in Years) $1.90 to $6.40 18,612 1.1 18,612 1.1 $8.04 to $11.72 72,717 2.3 72,717 2.3 $12.20 to $15.06 380,304 4.7 380,304 4.7 $16.06 to $24.00 706,791 6.1 639,948 6.1 $31.99 to $42.21 655,237 7.0 441,953 7.0 $55.10 to $99.65 410,736 7.8 185,749 7.8 $124.35 to $151.76 34,392 7.8 13,784 6.5 2,278,789 1,753,067 The total intrinsic value of options exercised during 2021, 2020, and 2019 was $173.2 There were no options granted during the year ended December 31, 2021. The weighted average grant date fair value of options granted during the years ended December 31, 2020, and 2019 was $34.00 and $19.80 per share, respectively. During the year ended , 1,051,226 options vested. There were 525,722 options unvested as of . As of December 31, 2021 All options granted to participants, including employees and non-employee directors, are measured based on the grant date fair value of the awards and recognized in the consolidated statements of operations over the period during which the participant is required to perform services in exchange for the award. The vesting period is generally employees and one year for non For the options granted during the periods presented, the fair value was estimated using the Black-Scholes option-pricing model with the following assumptions: For the Year Ended December 31, 2021 2020 2019 Fair market value of common stock — $66.26 - $151.76 $39.76 - $79.25 Volatility — 43% - 44% 40% Expected term — 5-6 years 5-6 years Expected dividend yield — n/a n/a Risk-free interest rate — 0.33% - 1.25% 1.68% - 2.65% Options are granted with an exercise price per share not less than the per share fair market value of the Company’s common stock on the grant date. The fair market value per share of the Company’s common stock for purposes of determining stock-based compensation is the closing price of the Company’s common stock as reported on the applicable grant date. Expected volatility for stock options is based on a combination of annualized daily historical volatility of the Company’s stock price and the historical and implied volatility of comparable publicly traded companies over a similar expected term. The expected term represents the period that the Company’s stock-based awards are expected to be outstanding. Given the Company’s relative inexperience of significant exercise activity, the expected term assumptions were determined based on application of the simplified method of expected term calculation by averaging the contractual life of option grants and the vesting period of such grants. This application, when coupled with the contractual life of ten years and average vesting term of four years for employees and one year for non-employee directors, creates an expected term of six years and five years, respectively. The Company has not paid and does not expect to pay dividends. The risk-free interest rate was based on the rate for a U.S. Treasury zero-coupon issue with a term that closely approximates the expected life of the option grant at the date nearest the option grant date. Restricted Stock Units The following table summarizes RSU activity for the Company’s stock-based compensation plans for 2021: Weighted Average Grant Date Fair Restricted Stock Units Value Per Share RSUs outstanding as of January 1, 2021 2,359,063 $ 70.17 RSUs granted 1,282,177 $ 138.79 RSUs vested (524,246 ) $ 68.36 RSUs cancelled (255,031 ) $ 90.66 RSUs outstanding as of December 31, 2021 2,861,963 $ 99.41 Stock-based compensation cost for RSUs is recognized on a straight-line basis in the consolidated statements of operations over the period during which the participant is required to perform services in exchange for the award, based on the fair value of the Company’s underlying common stock on the grant date. The vesting period of each RSU grant is generally four years for employees and one year for non-employee directors. December 31, 2021 Performance Share Units The following table summarizes PSU activity for the Company’s stock-based compensation plans for 2021: Weighted Average Performance Share Grant Date Fair Units Value Per Share PSUs outstanding as of January 1, 2021 — $ — PSUs granted 120,632 $ 147.39 PSUs vested — $ — PSUs cancelled (5,742 ) $ 150.00 PSUs outstanding as of December 31, 2021 114,890 $ 147.26 During the first quarter of 2021, PSUs were granted for the first time. Stock-based compensation cost for PSUs is recognized on a graded vesting basis in the consolidated statements of operations over the period during which the participant is required to perform services in exchange for the award, based on the fair value of the Company’s underlying common stock on the grant date and the number of PSUs expected to be earned over the service period. Each PSU grant will vest in annual tranches over a three-year three-year As of December 31, 2021, $19.9 million of total unrecognized compensation cost related to PSUs was expected to be recognized over a weighted average period of approximately 1.9 years. Employee Stock Purchase Plan The ESPP is intended to qualify as an employee stock purchase plan under Section 423 of the Internal Revenue Code of 1986, as amended. Under the ESPP, employee purchases occur at the end of discrete offering periods. Offering periods begin on August 1 and February 1 each year (or such other date determined by our Board of Directors or our Compensation and Leadership Development Committee). Under the ESPP, eligible employees can acquire shares of the Company’s common stock by accumulating funds through payroll deductions. Employees generally are eligible to participate in the ESPP if they are a U.S. employee and are employed for at least 20 hours per week. The Company may impose additional restrictions on eligibility. Eligible employees can select a rate of payroll deduction between 1% and 15% of their compensation. The purchase price for shares of common stock purchased under the ESPP is 85% of the lesser of the fair market value of the Company’s common stock on (i) the first day of the applicable offering period or (ii) the last day of the purchase period in the applicable offering period. An employee’s participation automatically ends upon termination of employment for any reason. The Company initially reserved 996,709 shares of common stock for sale under the ESPP. The aggregate number of shares reserved for sale under the ESPP increases automatically on each January 1, beginning January 1, 2019, by the number of shares equal to the least of (i) 1,000,000 shares of common stock, (ii) 1% of the aggregate number of shares of common stock outstanding on December 31st of the immediately preceding calendar year (rounded up to the nearest whole share), and (iii) an amount determined by the Board of Directors. No more than an aggregate of 10,102,525 shares of common stock may be issued over the ten-year As of December 31, 2021 shares of common stock remain available for issuance under the ESPP. As of December 31, 2021 For the years ended December 31, 2021 For the Year Ended December 31, 2021 2020 2019 Fair market value of common stock $152.35 to $166.84 $87.23 to $138.83 $40.60 to $82.12 Volatility 31% to 34% 32% to 49% 40% Expected term 0.5 years 0.5 years 0.5 years Expected dividend yield n/a n/a n/a Risk-free interest rate 0.06% to 0.08% 0.11% to 1.54% 2.04% to 2.59%

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes Domestic and foreign components of loss before income tax are as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Domestic $ (93,556 ) $ (34,483 ) $ (30,272 ) Foreign (28,369 ) (23,009 ) (18,987 ) Total $ (121,925 ) $ (57,492 ) $ (49,259 ) Major components of the income tax (provision) benefit are as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Current: Federal $ — $ — $ — State — — — Foreign (2,180 ) (1,110 ) (1,178 ) Total current income tax provision (2,180 ) (1,110 ) (1,178 ) Deferred: Federal (1,746 ) 6,790 (90 ) State (526 ) 1,657 (53 ) Foreign 1,144 972 366 Total deferred income tax (provision) benefit (1,128 ) 9,419 223 Total $ (3,308 ) $ 8,309 $ (955 ) In connection with the TTR and Impendulo acquisitions, the Company recorded net deferred tax liabilities which provide an additional source of taxable income to support the realization of pre-existing deferred tax assets. Accordingly, during the year ended December 31, 2020, the Company released $9.5 million of its valuation allowance resulting in a deferred tax benefit for the same amount. Measurement period adjustments made to TTR purchase price accounting during the year ended December 31, 2021, reduced the net deferred tax liabilities recorded to goodwill. As a result, during the year ended December 31, 2021, the Company increased its valuation allowance by $1.9 million resulting in a deferred tax expense for the same amount. It is the Company’s intention to reinvest the earnings of non-U.S. subsidiaries in those operations. As of December 31, 2021, the Company has not made a provision for U.S. or additional foreign withholding taxes for any outside basis differences inherent in its investments in foreign subsidiaries that are indefinitely reinvested. It is not practicable to estimate the amount of deferred tax liability related to investments in these foreign subsidiaries. Reconciliation of (Provision for) Benefit from Income Taxes Major differences between the U.S. statutory rate of 21% and the effective tax rate are as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Tax at statutory rate $ 25,601 $ 12,073 $ 10,345 State taxes 4,462 1,349 1,941 Research and development credits 3,993 2,960 2,285 Stock-based compensation 47,602 56,766 67,718 Impact of foreign operations 2,740 342 (1,373 ) Change in valuation allowance (85,842 ) (65,485 ) (80,284 ) Other (1,864 ) 304 (1,587 ) Total $ (3,308 ) $ 8,309 $ (955 ) Deferred Tax Assets and Liabilities Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred tax assets and liabilities are as follows (in thousands): December 31, 2021 2020 Deferred tax assets: Net operating loss carryforward $ 315,482 $ 240,048 Stock-based compensation 18,400 10,484 Deferred revenue 682 — Research and development credit, net of uncertain tax position reserve 13,543 9,284 Operating lease liabilities 14,498 16,237 Other 14,191 11,016 Total deferred tax assets 376,796 287,069 Deferred tax liabilities: Deferred commissions (17,208 ) (12,288 ) Operating lease right-of-use assets (11,331 ) (12,243 ) Property and equipment (6,625 ) (4,458 ) Definite-lived intangibles (5,073 ) (8,278 ) Indefinite-lived intangibles (4,433 ) (3,127 ) Deferred revenue — (322 ) Other (86 ) (193 ) Total deferred tax liabilities (44,756 ) (40,909 ) Net deferred tax assets before valuation allowance 332,040 246,160 Valuation allowance (335,952 ) (246,598 ) Net deferred tax liability $ (3,912 ) $ (438 ) The following tables summarizes the Company's net operating loss and research credit carryforwards (dollars in thousands): December 31, 2021 Year Expiration Begins (if not utilized) Federal net operating loss carryforwards generated 2017 and prior $ 288,052 2025 Federal net operating loss carryforwards generated after 2017 857,522 Non-expiring Total Federal net operating loss carryforwards 1,145,574 State net operating loss carryforwards 790,264 2022 Foreign net operating loss carryforwards 110,463 Non-expiring Federal research & development credits 21,890 2030 State research & development credits 1,191 2040 Foreign research & development credits 378 2039 The future utilization of federal net operating loss carryforwards generated after 2017 is limited to 80% of taxable income. An additional limitation applies to the use of federal net operating loss and credit carryforwards, under Section 382 of the Internal Revenue Code of 1986, as amended, that is applicable if the Company experiences an “ ” “ ” Accounting for Uncertainty in Income Taxes The Company has assessed its ability to realize its deferred tax assets and has recorded a valuation allowance against such assets to the extent that, based on the weight of all available evidence, it is more likely than not that all or a portion of the deferred tax assets will not be realized. In assessing the likelihood of future realization of its deferred tax assets, the Company placed a significant amount of weight on its history of generating tax losses in the U.S., U.K., and Brazil, including in the current year. The increase in the valuation allowance each period was primarily related to U.S. federal and state tax losses incurred during the period. The Company has established an accrual for uncertain tax positions related to its U.S. research and development credits and for the valuation of intellectual property transferred between international entities. As of December 31, 2021 and 2020, the Company has $9.1 million and $7.0 million of unrecognized tax benefits, of which the total amount that would impact the effective tax rate, if recognized, is $0.2 million. As of December 31, 2021, the Company has recorded an immaterial amount of interest and penalties related to its unrecognized tax benefits, which are classified as a component of income tax expense. The Company does not believe it is reasonably possible that its unrecognized tax benefits will significantly change in the next 12 months. A reconciliation of the beginning and ending balances for unrecognized tax benefits is as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Balance at January 1 $ 7,029 $ 5,210 $ 4,118 Additions for tax positions related to the current year 2,081 1,799 1,435 Additions for tax positions related to prior years 23 20 — Reductions for tax positions related to prior years — — (343 ) Reductions related to settlements — — — Reductions related to a lapse of statute — — — Balance at December 31 $ 9,133 $ 7,029 $ 5,210 The Company files income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. With limited exceptions, all tax years for which the Company has filed a tax return remain open due to the existence of NOLs.

Net Loss Per Share Attributable

Net Loss Per Share Attributable to Common Shareholders	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Net Loss Per Share Attributable to Common Shareholders	14. Net Loss Per Share Attributable to Common Shareholders The Company calculates basic and diluted net loss per share attributable to common shareholders in conformity with the two-class method required for companies with participating securities. The diluted net loss per share attributable to common shareholders is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. This includes using the if-converted method for calculating any potential dilutive effect of the convertible senior notes. For purposes of this calculation, all common stock equivalents have been excluded from the calculation of diluted net loss per share attributable to common shareholders as their effect is antidilutive. As a result, basic and diluted net loss per common share was the same for each period presented. The following table sets forth the computation of basic and diluted net loss per common share (in thousands, except per share data): For the Year Ended December 31, 2021 2020 2019 Numerator: Net loss attributable to common shareholders $ (125,233 ) $ (49,183 ) $ (50,214 ) Denominator: Weighted-average common shares outstanding-basic 86,263 80,985 73,345 Dilutive effect of share equivalents resulting from stock options, RSUs, PSUs, ESPP shares, and convertible senior notes (if converted) — — — Weighted-average common shares outstanding-diluted 86,263 80,985 73,345 Net loss per common share, basic and diluted $ (1.45 ) $ (0.61 ) $ (0.68 ) The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to common shareholders for the periods presented because the impact of including them would have been antidilutive (in thousands): Year Ended December 31, 2021 2020 2019 Options to purchase common shares 2,905 4,653 7,987 Unvested RSUs 2,635 2,091 1,157 Unvested PSUs 108 — — ESPP shares 10 10 13 Convertible senior notes (if converted) 1,584 — — Total 7,242 6,754 9,157

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Accounting Principles	Accounting Principles The consolidated financial statements and accompanying notes were prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”).
Reclassifications	Reclassifications Certain prior period
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements include those of the Company and its subsidiaries after elimination of all intercompany accounts and transactions.
Segments	Segments The Company operates its business as one operating segment. Operating segments are defined as components of an enterprise about which separate financial information is evaluated regularly by the chief operating decision maker, the Company’s Chief Executive Officer, in deciding how to allocate resources and assess performance. The Company’s chief operating decision maker allocates resources and assesses performance based upon discrete financial information at the consolidated level. In 2021, approximately 8%, and in each of 2020 and 2019, approximately 6%, of the Company’s revenue was generated outside of the United States, respectively. As of December 31, 2021, and 2020, approximately 25% and 27%, respectively, of the Company’s long-lived assets were held outside of the United States. As of December 31, 2021, and 2020, approximately 12% and 15% of the Company’s long-lived assets were held in India, respectively. As of both December 31, 2021, and 2020, approximately 9% of the Company’s long-lived assets were held in the United Kingdom.
Use of Estimates	Use of Estimates The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Significant estimates and judgments related to revenue are described below in the Revenue Recognition Accounting Policy. Significant estimates impacting expenses include: expected credit losses associated with the allowance for doubtful accounts; the measurement of fair values of stock-based compensation award grants; the expected payout level of performance share unit grants; the expected earnout obligations in connection with acquisitions; the expected term of the customer relationship for capitalized contract cost amortization; the valuation and useful lives of acquired intangible assets; the valuation of the fair value of reporting units for analyzing goodwill ; and the capitalization and useful life of capitalized software development costs . Actual results could materially differ from those estimates.
Risks and Uncertainties	Risks and Uncertainties The Company has incurred significant operating losses since its inception, including net losses of $125.2 million, $49.2 million, and $50.2 million for the years ended December 31, 2021, 2020, and 2019, respectively. The Company had an accumulated deficit of $684.6 million and $559.4 million as of December 31, 2021, and 2020, respectively. The Company believes that its cash and cash equivalents of $1.5 billion as of December 31, 2021, is adequate to satisfy its current obligations.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include highly liquid investments with original maturities of three months or less. The carrying value of our cash and cash equivalents approximates fair value given their short-term nature.
Restricted Cash	Restricted Cash Restricted cash represents cash that is segregated from the Company’s operating funds and is held to satisfy holdback liabilities related to acquisitions (see Note 5).
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A three-level fair value hierarchy prioritizes the inputs used to measure fair value. The hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows: • Level 1 • Level 2 • Level 3 The Company’s assessment of the significance of an input to the fair value measurement requires judgment, which may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels. The carrying amounts reported in the consolidated financial statements approximate the fair value for cash equivalents, restricted cash equivalents, trade accounts receivable, trade payables, and accrued expenses, due to their short-term nature. The Company has measured the fair value of money market funds and available-for-sale securities based on quoted prices in active markets for identical assets and liabilities. T
Trade Accounts Receivable	Trade Accounts Receivable Trade accounts receivable represent amounts due from customers when the Company has invoiced the customer and has not yet received payment. An invoice is issued when the customer is contractually obligated to pay for software subscriptions and/or services. Trade accounts receivable are presented net of an allowance for doubtful accounts. The allowance for doubtful accounts is the Company’s best estimate of the amount of expected credit losses in existing trade accounts receivable. The allowance for doubtful accounts is based on the assessment of collectability. The Company regularly reviews the adequacy of the allowance for doubtful accounts by considering several factors, including the age of each outstanding invoice, the collection history of customers, current economic conditions, and forecasted economic conditions. Additions to the allowance are charged to expense to the extent that revenue has been recognized for a contract. Amounts not yet recognized in revenue are charged to deferred revenue. The table below details the allowance for doubtful accounts (in thousands): December 31, 2021 2020 2019 Balance at the beginning of the year $ 3,983 $ 1,179 $ 521 Additions 4,587 4,412 1,201 Write-offs (2,767 ) (1,608 ) (543 ) Balance at the end of the year $ 5,803 $ 3,983 $ 1,179
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk are primarily cash, cash equivalents, restricted cash, accounts receivable, and funds held from customers. Cash, cash equivalents, restricted cash, and funds held from customers are held in financial institutions management believes have a high credit standing. To manage credit risk related to accounts receivable, the Company evaluates customers’ financial condition and generally collateral is not required. As of December 31, 2021, and 2020, there were no customers that represented more than 10% of the Company’s net trade accounts receivable or more than 10% of the Company’s revenue in any of the periods presented.
Customer Funds Assets and Obligations	Customer Funds Assets and Obligations Funds Held from Customers The Company has established a Delaware statutory trust (the “Customer Trust”) and appointed a federally insured bank as trustee, and the Customer Trust holds certain funds provided by its customers pending remittance to tax authorities. The Company is the sole beneficial owner of the Customer Trust. The Customer Trust is intended to be a bankruptcy-remote legal entity and meets the criteria in Accounting Standards Codification (“ASC”) Topic 810, Consolidation to be characterized as a variable interest entity (“VIE”). The Customer Trust is included in the Company’s consolidated financial statements because the Company determined it has a controlling financial interest in the Customer Trust as it has both (1) the power to direct the activities that most significantly impact the economic performance of the Customer Trust (including the power to make investment decisions for the trust) and (2) the right to receive benefits in the form of investment returns that could potentially be significant to the Customer Trust. In 2021, the Company began having certain customers remit tax payments to the Customer Trust with the intention that all customer funds will eventually be held by the Customer Trust. Funds held from customers represent restricted cash equivalents and available - for - sale securities that, based upon the Company’s intent, are restricted solely for satisfying the obligations to remit funds relating to the Company’s tax remittance services. Customer fund obligations represent the Company ’ s contractual obligations to remit funds to satisfy customers ’ tax obligations and are recorded on the consolidated balance sheets at the time that the Company or the Customer Trust collects funds from customers. December 31, December 31, 2021 2020 Funds held from customers (current assets): Restricted cash equivalents – Company $ 13 $ 30,598 Restricted cash equivalents – Customer Trust 62,126 — Available-for-sale securities – Customer Trust 370 — Funds held from customers $ 62,509 $ 30,598 Customer fund obligations (current liabilities): Customer fund obligations – Company $ 64,302 $ 31,549 Customer fund obligations $ 64,302 $ 31,549 Receivables from Customers Occasionally, the Company will pay a tax obligation to taxing authorities on behalf of its customer, prior to receiving funds from the customer or prior to receiving the refund due to the customer from the taxing authority. Accounts receivable from customers represent amounts the customer is contractually obligated to repay to the Company. The future economic benefit to the Company is restricted solely for the repayment of customer funds and taxing authority obligations. Receivables from customers deemed uncollectible are charged against a separate allowance for doubtful accounts. The allowance against receivables from customers is a result of the Company assuming credit risk associated with its customers’ tax remittance obligations. The table below details the allowance against receivables from customers (in thousands): December 31, 2021 2020 2019 Balance at the beginning of the year $ 593 $ 270 $ 198 Charged to expense 290 693 166 Write-offs (444 ) (370 ) (94 ) Balance at the end of the year $ 439 $ 593 $ 270 Customer Funds Obligations Customer funds obligations represent the Company’s contractual obligations to remit collected funds to satisfy customer tax payments. Customer funds obligations are reported as a current liability on the consolidated balance sheets, as the obligations are expected to be settled within one year. Changes in customer funds obligations liability are presented as cash flows from financing activities.
Marketable Securities	Marketable Securities The Company invests a portion of its funds held from customers in marketable securities classified as available-for-sale. Available-for-sale securities are recorded at fair value on the consolidated balance sheets. If the fair value of an available-for-sale security is below its amortized cost, the Company assesses whether it intends to sell the security or if it is more likely than not the Company will be required to sell the security before recovery. If either of those two conditions is met, the Company would recognize a charge in earnings equal to the entire difference between the security’s amortized cost basis and its fair value. If the Company does not intend to sell a security or if it is more likely than not that it will be required to sell the security before recovery, the unrealized loss is separated into an amount representing the credit loss, which is recognized in earnings, and the amount related to all other factors, which is recognized in accumulated other comprehensive loss. The Company did not recognize any credit impairment losses during the year ended December 31, 2021, or 2020.
Cloud Computing Arrangements	Cloud Computing Arrangements Implementation costs incurred in a cloud computing arrangement that is a service contract are capitalized and recorded in prepaid expenses and other current assets and other noncurrent assets on the consolidated balance sheets. Capitalized implementation costs include external professional service costs and internal personnel costs related to technical development. Post-implementation training and maintenance costs are expensed as incurred. For the years ended December 31, 2021, and 2020, $4.2 million and $3.1 million of cloud computing implementation costs were capitalized, respectively. Capitalized cloud computing implementation costs are amortized on a straight-line basis over the expected term of the arrangement. Cloud computing arrangements are tested for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. During 2021, the Company recorded a $0.7 million impairment charge related to cloud computing arrangements that were abandoned. The impairment charge is recorded in general and administrative and research and development expenses in the consolidated statement of operations for the year ended December 31, 2021.
Capitalized Software	Capitalized Software Software development costs for internal-use software (i.e., cloud-based software solutions) are capitalized once the project is in the application development stage in accordance with the accounting guidance for internal-use software. These capitalized costs include external direct costs of services consumed in developing or obtaining the software and personnel expenses for employees who are directly associated with the development. Capitalization of these costs concludes once the project is substantially complete, and the software is ready for its intended purpose. Post-configuration training and maintenance costs are expensed as incurred. For the years ended December 31, 2021, 2020, and 2019, $16.6 million, $4.2 million, and $2.3 million of software development costs were capitalized, respectively. Capitalized software development costs are amortized on a straight-line basis over the estimated useful life, generally 3 to 6 years. Software development costs are tested for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. In circumstances where software is developed for both cloud-based software solutions and for the purpose of being sold, leased, or otherwise marketed (i.e., customer hosted software), capitalization of development costs occurs after technological feasibility of the software is established and continues until the product is available for general release to customers. Since the Company’s developed software is available for general release concurrent with the establishment of technological feasibility, development costs are not capitalized in these circumstances.
Property and Equipment	Property and Equipment Property and equipment are stated at cost less accumulated depreciation. Depreciation on property and equipment is computed on the straight-line method over the estimated useful life of the asset or the lease term (for leasehold improvements), whichever is shorter. Upon retirement or sale, the cost of the disposed asset and the related accumulated depreciation are removed, and any resulting gain or loss is recorded in the consolidated statements of operations. Maintenance and repairs that do not improve or extend the lives of the respective assets are charged to expense in the period incurred.
Long-Lived Assets	Long-Lived Assets The Company evaluates long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. An impairment is recognized in the event the carrying value of such assets is not recoverable. If the carrying value is not recoverable, the fair value is determined, and an impairment is recognized for the amount by which the carrying value exceeds the fair value. An impairment of the Company’s operating lease right-of-use assets and related property and equipment of $0.8 million was recorded in 2020 (see Note 3). The impairment charge is recorded in general and administrative expenses in the consolidated statements of operations for the year ended December 31, 2020.
Leases	Leases Leases arise from contracts that convey the right to control the use of identified property or equipment for a period of time in exchange for consideration. The Company’s leasing arrangements are primarily for office space used to conduct operations. Additionally, the Company has leases for vehicles, office equipment and servers. The Company determines whether an arrangement is or contains a lease at the inception date, based on whether there is an identified asset and whether the Company controls the use of the identified asset throughout the period of use. Leases commence when the lessor makes the asset available for use. Leases are classified at commencement as either operating or finance leases. All the Company’s leases are classified as operating leases. Rent expense for operating leases is recognized on the straight-line method over the term of the agreement beginning on the lease commencement date. At commencement, the Company records an operating lease liability at the present value of future lease payments, net of any future lease incentives to be received. Lease agreements may include cancellable future periods subject to termination or extension options, which are not included in the future lease payments unless it is reasonably certain the Company will continue to utilize the asset for those periods. The discount rate used to determine the present value is the Company’s incremental borrowing rate (“IBR”) unless the interest rate implicit in the lease is readily determinable. Since the Company’s leases do not have an implicit interest rate that is readily determinable, the Company used the IBR as the discount rate for all leases. The IBR is an estimate of the Company’s collateralized borrowing rate and is estimated based on information available at the lease commencement date, including the lease term and the currency in which the arrangement is denominated. At commencement, a corresponding right-of-use asset is recorded, which is calculated based on the amount of the operating lease liability, adjusted for any advance lease payments paid, initial direct costs incurred, or lease incentives received prior to commencement. Right-of-use assets are subject to evaluation for impairment or disposal on a basis consistent with other long-lived assets (see Note 3). The Company does not record right-of-use assets or operating lease liabilities for leases with initial terms of 12 months or less and does not separate nonlease components from the associated lease components for real estate leases. The primary impact of this policy election is that included in the calculation of operating lease liabilities are any fixed and noncancelable future payments due under the contract for items such as common area maintenance, utilities, parking, and other costs. Lease-related costs, which are variable rather than fixed, are expensed in the period incurred. Variable lease costs consist primarily of common area maintenance and utilities costs for the Company’s office spaces that are due based on the actual costs incurred by the landlord. Lease payments that depend on an index or a rate are measured using the index or rate at the commencement date and are included in operating lease costs. Subsequent increases to lease payments due to a change in the index or rate are expensed as a variable lease cost. The Company accounts for subleases from the perspective of a lessor and evaluates the duration of subleases based on the reasonable certainty of any sublessor termination and extension options, as well as the lease term for the underlying asset. The Company has one sublease classified as an operating lease. For subleases classified as operating leases, the Company records sublease income as a reduction of lease expense on the straight-line method over the term of the sublease.
Business Combinations and Goodwill	Business Combinations and Goodwill The Company’s identifiable assets acquired and liabilities assumed in a business combination are recorded at their acquisition date fair values, which may be considered preliminary and subject to adjustment during the measurement period, which is up to one year from the acquisition date. The valuation requires management to make significant estimates and assumptions, especially with respect to intangible assets. Critical estimates in valuing intangible assets include, but are not limited to: • future expected cash flows from customer agreements, customer lists, distribution agreements, non-compete agreements, and proprietary content and technology; • assumptions about the length of time the brand will continue to be used in the Company’s suite of solutions; • royalty rates used to estimate the fees that could be charged to license the proprietary content and technology; and • discount rates used to determine the present value of recognized assets and liabilities. The Company’s estimates of fair value are based upon assumptions it believes to be reasonable, but that are inherently uncertain and unpredictable. Assumptions may be incomplete or inaccurate, and unanticipated events and circumstances may occur. Goodwill is calculated as the excess of the purchase price over the fair value of net assets acquired, including the amount assigned to identifiable intangible assets. Acquisition-related costs, including advisory, legal, accounting, valuation, and other costs, are expensed in the periods in which these costs are incurred. The results of operations of an acquired business are included in the consolidated financial statements beginning at the acquisition date. Goodwill is tested for impairment annually on October 31, or in the event of certain occurrences. There was no goodwill impairment recorded for the years ended December 31, 2021, 2020 or 2019. The Company estimates the fair value of the earnout liabilities related to business combinations using various valuation approaches, as well as significant unobservable inputs, reflecting the Company’s assessment of the assumptions market participants would use to value these liabilities. Following final determination of the acquisition date fair value, the fair value of the earnout is remeasured each reporting period, with any change in the value recorded as fair value changes in earnout liabilities in the consolidated statements of operation. The Company recorded
Acquired Intangible Assets	Acquired Intangible Assets Acquired intangible assets consist of developed technology, including in-process research and development (“IPR&D”), customer relationships, backlog, database content, noncompetition agreements, and tradenames and trademarks, resulting from the Company’s acquisitions. Acquired intangible assets are recorded at fair value on the date of acquisition and amortized over their estimated useful lives. IPR&D is initially capitalized at fair value as a developed technology intangible asset with an indefinite life and assessed for impairment thereafter. When an IPR&D project is completed, it is amortized over the asset’s estimated useful life. The Company recognizes an earnout liability for acquisitions of intangible assets that are accounted for as an asset acquisition when the liability is earned and the amount is known. The earnout liability is capitalized as part of the cost of the assets acquired and amortized over the remaining useful life of the asset. Asset acquisition-related costs, primarily legal fees, are capitalized and included in the cost basis of the intangible asset when incurred.
Convertible Senior Notes	Convertible Senior Notes In August 2021, the Company completed a private offering of $977.5 million principal amount of 0.25% convertible senior notes due 2026 (the “2026 Notes”). As discussed below, the Company early adopted ASU No. 2020-06 as of January 1, 2021, and concluded that the 2026 Notes will be accounted for as debt, with no bifurcation of the embedded conversion feature. Debt issuance costs related to the Company’s issuance of the 2026 Notes consist primarily of purchaser’s discounts, commissions, and related costs. The debt issuance costs were recorded as a direct deduction from the liability associated with the 2026 Notes on the consolidated balance sheet and are amortized to interest expense over the term of the 2026 Notes. In connection with the offering of the 2026 Notes, the Company purchased capped calls from certain financial institutions with respect to its common stock. As the capped calls are both legally detachable and separately exercisable from the 2026 Notes, the Company accounts for the capped calls separately from the 2026 Notes. The capped calls are indexed to the Company’s own common stock and classified in stockholder’s equity. As such, the premiums paid for the capped calls have been included as a net reduction to additional paid-in capital in the consolidated balance sheet as of December 31, 2021.
Income Taxes	Income Taxes The Company’s deferred tax assets and liabilities are determined based on temporary differences between the financial reporting and income tax basis of assets and liabilities and are measured using the tax rates that will be in effect when the differences are expected to reverse. A valuation allowance is recorded when it is more likely than not that some of the deferred tax assets will not be realized. The Company assesses its income tax positions and records tax benefits or expense based upon management’s evaluation of the facts, circumstances, and information available at the reporting date. The objectives of accounting for income taxes are to recognize the amount of taxes payable or refundable for the current year and deferred tax liabilities and assets for the future tax consequences of events that have been recognized in an entity’s financial statements or tax returns. The Company will recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. Judgment is required in assessing the future tax consequences of events that have been recognized in the Company’s consolidated financial statements or tax returns. Variations in the actual outcome of these future tax consequences could materially impact the consolidated financial statements.
Revenue Recognition	Revenue Recognition The Company primarily generates revenue from fees paid for subscriptions to tax compliance solutions and fees paid for services performed in preparing and filing tax returns on behalf of its customers. Amounts that have been invoiced are recorded in trade accounts receivable and deferred revenue, contract liabilities, or revenue, depending upon whether the revenue recognition criteria have been met. Revenue is recognized once the customer is provisioned and as services are provided in an amount that reflects the consideration the Company expects to be entitled to in exchange for those services. The Company determines revenue recognition through the following five-step framework: • Identification of the contract, or contracts, with a customer; • Identification of the performance obligations in the contract; • Determination of the transaction price; • Allocation of the transaction price to the performance obligations in the contract; and • Recognition of revenue when, or as, the Company satisfies a performance obligation. The Company identifies performance obligations in its contracts with customers, which primarily include subscription services and professional services. The transaction price is determined based on the amount which the Company expects to be entitled to in exchange for providing the promised services to the customer. The transaction price in the contract is allocated to each distinct performance obligation on a relative standalone selling price basis. Revenue is recognized when performance obligations are satisfied. Contract payment terms are typically net 30 days. Collectability is assessed based on a number of factors including collection history and creditworthiness of the customer, and the Company may mitigate exposure to credit risk by requiring payments in advance. If collectability of substantially all consideration to which the Company is entitled under the contract is determined to be not probable, revenue is not recorded until collectability becomes probable at a later date. Revenue is recorded based on the transaction price excluding amounts collected on behalf of third parties, such as sales taxes collected and remitted to governmental authorities. Subscription and Returns Revenue Subscription and returns revenue primarily consist of contractually agreed upon fees paid for using the Company’s cloud-based solutions, which include tax calculation, preparing and filing transaction tax returns, compliance document management, and tax content subscription services. Under the Company’s subscription agreements, customers select a price plan that includes an allotted maximum number of transactions or number of jurisdictions over the subscription term. Unused transactions are not carried over to the customer’s next subscription term, and customers are not entitled to refunds of fees paid or relief from fees due in the event they do not use the allotted number of transactions. If customers exceed the maximum transaction level within their price plan, the Company will generally upgrade the customer to a higher transaction price plan or, in some cases, charge overage fees on a per transaction basis. Fees paid for subscription services to tax content vary depending on the volume of tax information accessible to the customer. The Company’s subscription arrangements do not provide the customer with the right to take possession of the software supporting the cloud-based application services. The Company’s standard subscription contracts are non-cancelable except where contract terms provide rights to cancel in the first 60 days of the contract term. Cancellations under the Company’s standard subscription contracts are not material, and do not have a significant impact on revenue recognized. Tax returns processing services include collection of tax data and amounts, preparation of compliance forms, and submission to taxing authorities. Returns processing services are primarily charged on a subscription basis for an allotted number of returns to process within a given time period. We earn SST revenue from participating state and local governments based on a percentage of the sales tax reported and paid. Revenue is recognized ratably over the contractual term of the arrangement, beginning on the date that the service is made available to the customer. The Company invoices its subscription customers for the initial term at contract signing and at each subscription renewal. Initial terms generally range from 12 to 18 months, and renewal periods are typically one year. Amounts that are contractually billable and have been invoiced, or which have been collected as cash, are initially recorded as deferred revenue or contract liabilities. While most of the Company’s customers are invoiced once at the beginning of the term, a portion of customers are invoiced semi-annually, quarterly, or monthly. Included in the total subscription fee for cloud-based solutions are non-refundable upfront fees that are typically charged to new customers. These fees are associated with work performed to set up a customer with the Company’s services, and do not represent a distinct good or service. Instead, the fees are included within the transaction price and allocated to the remaining performance obligations in the contract. The Company recognizes revenue for these fees in accordance with the revenue recognition for those performance obligations. Also included in subscription and returns revenue is interest income on funds held for customers. The Company uses trust accounts at FDIC-insured institutions to provide tax remittance services to customers and collect funds from customers in advance of remittance to tax authorities. After collection and prior to remittance, the Company earns interest on these funds. Professional Services Revenue The Company generates professional services revenue from providing tax analysis and services, including tax registrations, voluntary disclosure agreements, nexus studies, and backfiling services. Additionally, the Company provides configurations, data migrations, integration, and training for its subscriptions and returns products. The 2020 acquisitions of TTR and Business Licenses (see Note 5) expanded the scope of professional services to include business licenses and tax refund claims and recovery assistance. The Company invoices for professional service arrangements on a fixed fee, milestone, or time and materials basis. The transaction price allocated to professional services performance obligations is recognized as revenue as services are performed or upon completion of work. Judgments and Estimates The Company’s contracts with customers often include obligations to provide multiple services to a customer. Determining whether services are considered distinct performance obligations that should be accounted for separately from one another requires judgment. Subscription services and professional services are both distinct performance obligations that are accounted for separately. Judgment is required to determine the standalone selling price (“SSP”) for each distinct performance obligation. The Company allocates revenue to each performance obligation based on the relative SSP. The Company determines SSP for performance obligations based on overall pricing objectives, which take into consideration observable prices, market conditions and entity-specific factors. This includes a review of historical data related to the services being sold and customer demographics. The Company uses a range of amounts to estimate SSP for performance obligations. There is typically more than one SSP for individual services due to the stratification of those services by information, such as size and type of customer.
Deferred Revenue	Deferred Revenue Deferred revenue consists of customer billings and payments in advance of revenue being recognized from the Company’s contracts. The Company typically invoices its customers annually in advance for its subscription-based contracts. Deferred revenue and accounts receivable are recorded at the beginning of the new subscription term. For some customers, the Company invoices in monthly, quarterly, or multi-year installments and, therefore, the deferred revenue balance does not necessarily represent the total contract value of all non-cancelable subscription agreements. Deferred revenue anticipated to be recognized during the succeeding 12-month period is recorded as current deferred revenue and the remaining portion is recorded as noncurrent deferred revenue.
Integration and Referral Partner Commissions	Integration and Referral Partner Commissions The Company utilizes independent partners to build and maintain integrations for a broad range of business applications, such as accounting, ERP, ecommerce, marketplace, POS, recurring billing, and CRM systems. These integrations link the business application to the Company’s cloud-based software solutions. Integration partners are paid a commission based on a percentage of the sales that use the integration. In general, integration partners are paid a higher commission for the initial sale to a new customer and a lower commission for renewal sales. Referral partners bring new customers to the Company and earn a commission that is based on a percentage of the first-year sales. Some of the Company’s integration partners also refer customers that have purchased the partner’s business application. The Company recognizes commissions related to integration and referral partners when a binding customer order is placed. The Company defers the portion of partner commissions costs that are considered a cost of obtaining a new contract with a customer and amortizes these deferred costs over the period of benefit. The period of benefit is separately determined for each partner and is either six years or corresponds with the contract term. The Company expenses the remaining partner commissions as incurred. The Company classifies these costs as sales and marketing expenses. For 2021, 2020 and 2019, partner commission expense totaled $40.0 million, $30.2 A portion of the Company’s revenue is generated from sales made directly by integration partners, rather than through the Company. For these transactions, the Company evaluates whether revenue should be presented on a gross basis, which is the amount that a customer pays for the Company’s solution, or on a net basis, which is the customer payment less partner commissions. The Company has determined that a gross presentation is appropriate for revenue generated through these integration partners, because the Company is the primary provider of services to the end customers and is the primary obligor in these relationships. In addition, the Company has customer credit risk for non-payment and the Company has latitude in establishing and negotiating prices on transactions from these sources.
Assets Recognized from the Costs to Obtain a Contract with a Customer	Assets Recognized from the Costs to Obtain a Contract with a Customer The Company recognizes an asset for the incremental costs of obtaining a contract with a customer if it expects the benefit of those costs to be longer than one year. The Company has determined that certain costs related to employee sales incentive programs (sales commissions) and partner commission programs represent incremental costs of obtaining a contract and therefore should be capitalized. Capitalized costs are included in deferred commissions on the consolidated balance sheets. These deferred commissions are amortized over an estimated period of benefit, generally six years. The Company determines the period of benefit by taking into consideration past experience with customers, the expected life of acquired technology that generates revenue, industry peers, and other available information. The period of benefit is generally longer than the term of the initial contract because of anticipated renewals. The Company elected to apply the practical expedient to recognize the incremental costs of obtaining a contract as an expense if the amortization period of the asset would have been one year or less.
Cost of Revenue	Cost of Revenue Cost of revenue consists of personnel and related expenses for providing the Company’s solutions and supporting its customers, including salaries, benefits, bonuses, and stock-based compensation, tax content, depreciation of capitalized software development costs, amortization of acquired developed technology intangible assets, direct costs and allocated costs associated with information technology such as software hosting costs, tax content maintenance, and certain services provided by third parties. Cost of revenue also includes allocated rent and overhead.
Research and Development	Research and Development Research and development expenses consist primarily of personnel and related expenses for the Company’s software engineering, product development, and quality assurance, including salaries, benefits, bonuses and stock-based compensation, third-party contractors, and allocated overhead for certain information technology and facility expenses, along with depreciation of equipment. Expenditures for research and development are expensed as incurred.
Advertising Costs	Advertising Costs The Company expenses all advertising costs as incurred and classifies these costs as sales and marketing expenses. Advertising expenses were $35.5 million, $24.3 million, and $20.2 million for the years ended December 31, 2021, 2020, and 2019, respectively.
Foreign Currency Translation	Foreign Currency Translation Assets and liabilities of each of the Company’s foreign subsidiaries are translated at the exchange rate in effect at each period-end. Consolidated statement of operations amounts are translated at the average rate of exchange prevailing during the period. Translation adjustments arising from differing exchange rates from period to period are included in accumulated other comprehensive loss within shareholders’ equity.
Employee Benefit Plan	Employee Benefit Plan The Company offers a salary deferral 401(k) plan for its U.S. employees. The plan allows employees to contribute a percentage of their annual compensation, subject to limitations imposed by the Internal Revenue Service. The plan also allows the Company to make matching contributions, subject to certain limitations. The Company contributed $5.4 million, $3.6 million, and $3.8 million to the plan in 2021, 2020, and 2019, respectively.
Self-Insurance	Self-Insurance The Company maintains a self-insured healthcare plan for eligible U.S. employees. Under the plan, the Company pays healthcare claims and fees to the plan administrator. Total claim payments are limited by stop loss insurance policies. As there generally is a lag between the time a claim is incurred by a participant and the time the claim is submitted for payment, the Company has recorded a self-insurance reserve for estimated outstanding claims within accrued expenses in the consolidated balance sheets.
Stock-Based Compensation	Stock-Based Compensation The Company accounts for stock-based compensation by calculating the fair value of each option, restricted stock unit (“RSU”) or performance share unit (“PSU”) issued under the 2018 Equity Incentive Plan (the “2018 Plan”)
Deferred Financing Costs	Deferred Financing Costs Deferred financing costs, consisting primarily of legal, accounting, printing, and filing services, and other direct fees and costs related to public offerings of common stock, are capitalized. The deferred financing costs related to the Company’s public offerings of common stock were offset against proceeds from those offerings upon the closing of each offering.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Recently Adopted Accounting Standards ASU 2019-12 In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which amends the existing guidance relating to the accounting for income taxes. This ASU is intended to simplify the accounting for income taxes by removing certain exceptions to the general principles of accounting for income taxes and to improve the consistent application of U.S. GAAP for other areas of accounting for income taxes by clarifying and amending existing guidance. This ASU is effective for fiscal years beginning after December 15, 2020, with early adoption permitted. The Company adopted the guidance on January 1, 2021 , and the adoption of this new guidance does not have a material effect on its consolidated financial statements. ASU 2020-06 In August 2020, the FASB issued ASU No. 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which amends the accounting standards for convertible debt instruments that may be settled entirely or partially in cash upon conversion. ASU No. 2020-06 eliminates requirements to separately account for liability and equity components of such convertible debt instruments and eliminates the ability to use the treasury stock method for calculating diluted earnings per share for convertible instruments whose principal amount may be settled using shares. Instead, ASU No. 2020-06 requires (i) the entire amount of the security to be presented as a liability on the balance sheet and (ii) application of the “if-converted” method for calculating diluted earnings per share. The required use of the “if-converted” method will not impact the Company’s diluted earnings per share as long as the Company is in a net loss position. The guidance in ASU No. 2020-06 is required for annual reporting periods, including interim periods within those annual periods, beginning after December 15, 2021, for public business entities. Early adoption is permitted, but no earlier than annual reporting periods beginning after December 15, 2020, including interim periods within those annual reporting periods. The Company early adopted this guidance for the fiscal year beginning January 1, 2021, and did so on a modified retrospective basis, without requiring any adjustments. The adoption of ASU No. 2020-06 impacted the accounting for the offering of the 2026 Notes issued by the Company in August 2021, see Note 10 for further discussion.
New Accounting Standards Not Yet Adopted	New Accounting Standards Not Yet Adopted ASU 2021-08 In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which amends the accounting related to contract assets and liabilities acquired in business combinations. Under current GAAP, an entity generally recognizes assets and liabilities acquired in a business combination, including contract assets and contract liabilities arising from revenue contracts with customers, at fair value on the acquisition date. ASU 2021-08 requires that entities recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with ASC Topic 606, Revenue from Contracts with Customers. ASU 2021-08 is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, and should be applied prospectively to businesses combinations occurring on or after the effective date of the amendment. Early adoption is permitted, including adoption in an interim period. The Company plans to adopt this new guidance in the first quarter of 2023 and is currently evaluating the impact of this new guidance on the consolidated financial statements.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Allowance For Doubtful Accounts	The table below details the allowance for doubtful accounts (in thousands): December 31, 2021 2020 2019 Balance at the beginning of the year $ 3,983 $ 1,179 $ 521 Additions 4,587 4,412 1,201 Write-offs (2,767 ) (1,608 ) (543 ) Balance at the end of the year $ 5,803 $ 3,983 $ 1,179 December 31, 2021 2020 2019 Balance at the beginning of the year $ 593 $ 270 $ 198 Charged to expense 290 693 166 Write-offs (444 ) (370 ) (94 ) Balance at the end of the year $ 439 $ 593 $ 270
Summary of Funds Held from Customers and Customer Fund Obligations Held by Company and by Customer Trust	Customer fund obligations represent the Company ’ s contractual obligations to remit funds to satisfy customers ’ tax obligations and are recorded on the consolidated balance sheets at the time that the Company or the Customer Trust collects funds from customers. December 31, December 31, 2021 2020 Funds held from customers (current assets): Restricted cash equivalents – Company $ 13 $ 30,598 Restricted cash equivalents – Customer Trust 62,126 — Available-for-sale securities – Customer Trust 370 — Funds held from customers $ 62,509 $ 30,598 Customer fund obligations (current liabilities): Customer fund obligations – Company $ 64,302 $ 31,549 Customer fund obligations $ 64,302 $ 31,549

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis	T he following financial assets and liabilities are measured at fair value on a recurring basis. The fair values recognized in the accompanying consolidated balance sheets and the level within the fair value hierarchy in which the fair value measurements fall is as follows (in thousands): Fair Value Measurements Using Quoted Prices Significant in Active Other Significant Markets for Observable Unobservable Fair Identical Assets Inputs Inputs December 31, 2021 Value (Level 1) (Level 2) (Level 3) Money market funds $ 1,439,522 $ 1,439,522 $ — $ — Available-for-sale securities: U.S. treasury securities 370 370 — — Earnouts related to business combinations 113,978 — — 113,978 Fair Value Measurements Using Quoted Prices Significant in Active Other Significant Markets for Observable Unobservable Fair Identical Assets Inputs Inputs December 31, 2020 Value (Level 1) (Level 2) (Level 3) Money market funds $ 649,603 $ 649,603 $ — $ — Earnouts related to business combinations 34,501 — — 34,501
Summary of Assumptions Used to Calculate the Estimated Earnout Liabilities	The following table provides summary information of our assumptions used to calculate the estimated earnout liabilities related to 2021 and 2020 acquisitions (in thousands): Balance as of Balance as of Acquisition Year of Acquisition Earnout Target Method Earnout Period Discount Rate December 31, 2021 December 31, 2020 CrowdReason 2021 Specific revenue growth thresholds through October 2024, a cap of $30.0 million is available; to be settled in cash. Probability-weighted discounted cash flows and Monte Carlo simulation October 2024 3.5 % (a) $ 26,320 $ — Track1099 2021 Specific revenue growth thresholds through April 2023, with a cap of $12.5 million; to be settled in cash. Probability-weighted discounted cash flows and Monte Carlo simulation April 2023 4.0 % (a) 7,880 — Davo 2021 Specific revenue growth thresholds through March 2023, with no cap; to be settled in cash. Probability-weighted discounted cash flows and Monte Carlo simulation March 2023 7.0 % (a) 35,885 — TTR 2020 Specific revenue growth thresholds through December 2022, with cap of $26.4 million; to be settled in cash. Probability-weighted discounted cash flows and Monte Carlo simulation December 2022 15.0 % (a) 24,830 15,740 Business Licenses 2020 Achievement of certain performance metrics through November 2024, with cap of $20.7 million; to be settled in common stock. Scenario-based approach November 2024 4.8 % (b) 19,063 18,728 Balance end of period $ 113,978 $ 34,468 (a) The discount rate was calculated using the build-up method with a risk-free rate commensurate with the term of the earnout based on the equity, asset and revenue betas, size premium, and the Company’s specific risk premium, as well as the market risk premium using a bottom-up approach. (b) The discount rate was based on the Company's estimated credit yield. The Business Licenses earnout was assumed by management to have a high probability of achievement.
Summary of Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements	A reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the accompanying consolidated balance sheets using significant unobservable (Level 3) inputs, is as follows (in thousands): For the Year Ended December 31, 2021 2020 Earnout liabilities related to business combinations: Balance beginning of period $ 34,501 $ 13,808 Fair value recorded at acquisition 64,486 34,468 Measurement period adjustments 2,793 — Payments of earnout liabilities (33 ) (11,450 ) Fair value changes included in other expense (income), net 12,231 (2,325 ) Balance end of period $ 113,978 $ 34,501

Balance Sheet Detail (Tables)

Balance Sheet Detail (Tables)	12 Months Ended
	Dec. 31, 2021
Balance Sheet Related Disclosures [Abstract]
Schedule of Property and Equipment, Net	Property and equipment, net consisted of the following (in thousands): Useful December 31, December 31, Life (Years) 2021 2020 Computer equipment and software 3 to 5 $ 19,923 $ 15,749 Internally developed software 3 to 6 27,099 10,438 Furniture and fixtures 5 6,425 6,651 Office equipment 3 to 5 1,275 1,006 Leasehold improvements 1 to 10 30,046 29,928 84,768 63,772 Accumulated depreciation (38,304 ) (29,059 ) Property and equipment—net $ 46,464 $ 34,713
Schedule of Prepaid Expense And Other Current Assets	Prepaid expenses and other current assets consisted of the following (in thousands): December 31, December 31, 2021 2020 Licenses and subscriptions $ 14,511 $ 6,348 Prepaid and other current taxes 3,132 2,308 Deposits 3,746 4,570 Prepaid employee related expenses 2,780 1,516 Prepaid cloud computing implementation costs 1,708 340 Other 3,390 5,016 Total $ 29,267 $ 20,098
Schedule of Accrued Expenses	Accrued expenses consisted of the following (in thousands): December 31, December 31, 2021 2020 Accrued bonus $ 40,853 $ 29,518 Accrued partner commissions 13,088 9,173 Accrued payroll and related taxes 10,208 7,903 Employee stock purchase plan contributions 7,113 5,927 Accrued sales commissions 7,007 5,563 Contract liabilities 6,918 10,134 Accrued federal, state, local, and foreign taxes 3,926 4,338 Self-insurance reserves 2,401 1,563 Accrued interest payable 944 — Other 17,334 10,413 Total $ 109,792 $ 84,532

Acquisitions of Businesses (Tab

Acquisitions of Businesses (Tables)	12 Months Ended
	Dec. 31, 2021
Business Acquisition [Line Items]
Schedule of Pro Forma Financial Information (Unaudited)	The unaudited pro forma financial information as presented below is for informational purposes only and is not necessarily indicative of the results of operations that would have been achieved if the acquisitions had occurred on the dates indicated. For the Year Ended December 31, 2021 2020 Total revenue $ 711,047 $ 552,886 Pre-tax loss (124,428 ) (64,320 )
Inposia | Fair Value
Business Acquisition [Line Items]
Summary of Reconciliation of Preliminary Total Consideration	Measurement period adjustments recognized during 2021 related primarily to updated estimated fair values for acquired intangible assets, deferred tax liabilities, and a net working capital adjustment. As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Cash paid at closing (net of amounts returned) $ 14,671 $ (215 ) $ 14,456 Fair value of common stock issued at closing 22,971 — 22,971 Total consideration $ 37,642 $ (215 ) $ 37,427
Schedule of Estimated Fair Value of Assets Acquired and Liabilities Assumed	Fair values of the assets acquired and the liabilities assumed in the Inposia Purchase as of the acquisition date are provided in the following table (in thousands): As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Assets acquired: Cash and cash equivalents $ 1,264 $ — $ 1,264 Trade accounts receivable 1,767 — 1,767 Other current assets 268 — 268 Operating lease right-of-use assets 928 — 928 Property and equipment 98 — 98 Developed technology, customer relationships, and other intangibles 12,684 1,585 14,269 Goodwill 27,702 (1,182 ) 26,520 Other noncurrent assets 35 — 35 Total assets acquired 44,746 403 45,149 Liabilities assumed: Trade payables and accrued expenses 1,340 138 1,478 Deferred revenue 811 (1 ) 810 Other liabilities, noncurrent 106 — 106 Operating lease liabilities 928 — 928 Deferred tax liability 3,919 481 4,400 Total liabilities assumed 7,104 618 7,722 Net assets acquired $ 37,642 $ (215 ) $ 37,427
Summary of Valuation Methodologies, Significant Assumptions and Estimated Useful Lives	A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the Inposia Purchase are provided in the table below (in thousands): Intangible As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 1,585 $ 1,703 $ 3,288 Multi-period excess earnings-income approach 18.5 % 8 years Developed technology 9,572 — 9,572 Relief from royalty-income approach 18.5 % 6 years Noncompetition agreements 1,292 (118 ) 1,174 With-and-without valuation-income approach 21.0 % 3 years Tradename 235 — 235 Relief from royalty-income approach 18.5 % 3 years
Davo | Fair Value
Business Acquisition [Line Items]
Summary of Reconciliation of Preliminary Total Consideration	Measurement period adjustments recognized during 2021 related primarily to updated estimated fair values for acquired intangible assets, the earnout liability, and working capital adjustments. As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Cash paid through closing $ 23,818 $ — $ 23,818 Fair value of earnout provision 28,620 1,718 30,338 Fair value of holdbacks 2,600 (9 ) 2,591 Total consideration $ 55,038 $ 1,709 $ 56,747
Schedule of Estimated Fair Value of Assets Acquired and Liabilities Assumed	Fair values of the assets acquired and the liabilities assumed in the Davo Purchase as of the acquisition date are provided in the following table (in thousands): As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Assets acquired: Cash and cash equivalents $ 198 $ — $ 198 Funds held from customers 12,464 — 12,464 Trade accounts receivable 119 — 119 Other current assets 58 — 58 Operating lease right-of-use assets 46 — 46 Developed technology, customer relationships, and other intangibles 6,427 (1,776 ) 4,651 Goodwill 48,426 3,485 51,911 Other noncurrent assets 2 — 2 Total assets acquired 67,740 1,709 69,449 Liabilities assumed: Accrued expenses 117 — 117 Deferred revenue 75 — 75 Operating lease liabilities 46 — 46 Customer fund obligations 12,464 — 12,464 Total liabilities assumed 12,702 — 12,702 Net assets acquired $ 55,038 $ 1,709 $ 56,747
Summary of Valuation Methodologies, Significant Assumptions and Estimated Useful Lives	. Intangible As Reported June 30, 2021 Measurement Period Adjustment As Adjusted Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 4,350 $ (2,300 ) $ 2,050 Multi-period excess earnings-income approach and replacement cost method-cost approach 13.5 % 6 years Developed technology 1,800 150 1,950 Relief from royalty-income approach 13.5 % 5 years Noncompetition agreements 191 373 564 With-and-without valuation-income approach 15.5 % 5 years Tradename 86 1 87 Relief from royalty-income approach 13.5 % 1 year
Track1099 LLC | Fair Value
Business Acquisition [Line Items]
Summary of Reconciliation of Preliminary Total Consideration	Preliminary total consideration as of December 31, 2021, is presented below (in thousands): As of December 31, 2021 Cash paid through closing $ 35,000 Fair value of earnout provision 8,820 Fair value of holdbacks 4,984 Total consideration $ 48,804
Schedule of Estimated Fair Value of Assets Acquired and Liabilities Assumed	Purchase as of the acquisition date are provided in the following table (in thousands): As of December 31, 2021 Assets acquired: Prepaid and other current assets $ 2 Developed technology, customer relationships, and other intangibles 5,850 Goodwill 42,962 Total assets acquired 48,814 Liabilities assumed: Current liabilities 1 Deferred revenue 9 Total liabilities assumed 10 Net assets acquired $ 48,804
Summary of Valuation Methodologies, Significant Assumptions and Estimated Useful Lives	A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the Track1099 Purchase are provided in the table below (in thousands): Intangible Assigned Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 3,200 Multi-period excess earnings-income approach 28.0 % 5 years Developed technology 1,250 Relief from royalty-income approach 28.0 % 2 years Noncompetition agreement 1,300 With-and-without valuation-income approach 30.0 % 5 years Tradename 100 Relief from royalty-income approach 28.0 % 2 years
CrowdReason LLC and CorrelationAdvisors | Fair Value
Business Acquisition [Line Items]
Summary of Reconciliation of Preliminary Total Consideration	Preliminary total consideration as of December 31, 2021, is presented below (in thousands): As of December 31, 2021 Cash paid through closing $ 8,317 Fair value of earnout provision 26,320 Fair value of holdbacks 1,727 Total consideration $ 36,364
Schedule of Estimated Fair Value of Assets Acquired and Liabilities Assumed	Preliminary estimated fair values of the assets acquired and the liabilities assumed in the CrowdReason As of December 31, 2021 Assets acquired: Current assets $ 1,426 Developed technology, customer relationships, and other intangibles 10,300 Goodwill 25,415 Total assets acquired 37,141 Liabilities assumed: Current liabilities 101 Deferred revenue and contract liabilities 676 Total liabilities assumed 777 Net assets acquired $ 36,364
Summary of Valuation Methodologies, Significant Assumptions and Estimated Useful Lives	A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the CrowdReason Purchase are provided in the table below (in thousands): Intangible Assigned Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 5,700 Multi-period excess earnings-income approach 18.0 % 5 to 8 years Developed technology 3,900 Relief from royalty-income approach 18.0 % 5 years Backlog 450 Multi-period excess earnings-income approach 15.0 % 1 year Noncompetition agreements 100 With-and-without valuation-income approach 20.0 % 5 years Tradename 150 Relief from royalty-income approach 18.0 % 2 years
Transaction Tax Resources, Inc. | Fair Value
Business Acquisition [Line Items]
Summary of Reconciliation of Preliminary Total Consideration	A reconciliation of preliminary total consideration as of December 31, 2020, and total consideration as of December 31, 2021, is presented below (in thousands): As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Cash paid at closing $ 294,017 $ — $ 294,017 Fair value of holdbacks 57,477 (217 ) 57,260 Fair value of earnout provision 15,740 3,131 18,871 Total consideration $ 367,234 $ 2,914 $ 370,148
Schedule of Estimated Fair Value of Assets Acquired and Liabilities Assumed	Estimated fair values of the assets acquired and the liabilities assumed in the TTR Merger as of the acquisition date and including measurement period adjustments are provided in the following table (in thousands): As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Assets acquired: Cash and cash equivalents $ 2,294 $ — $ 2,294 Trade accounts receivable 5,966 — 5,966 Other current assets 93 — 93 Operating lease right-of-use assets 1,760 — 1,760 Property and equipment 848 — 848 Developed technology, customer relationships, and other intangibles 49,000 (7,500 ) 41,500 Goodwill 327,039 8,526 335,565 Total assets acquired 387,000 1,026 388,026 Liabilities assumed: Trade payables and accrued expenses 731 — 731 Deferred revenue 8,500 — 8,500 Operating lease liabilities 1,760 — 1,760 Deferred tax liability 8,775 (1,888 ) 6,887 Total liabilities assumed 19,766 (1,888 ) 17,878 Net assets acquired $ 367,234 $ 2,914 $ 370,148
Summary of Valuation Methodologies, Significant Assumptions and Estimated Useful Lives	A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the TTR Merger are provided in the table below (in thousands): Intangible As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 26,000 $ (5,000 ) $ 21,000 Multi-period excess earnings-income approach 18% 6 years Developed technology 9,600 — 9,600 Relief from royalty-income approach and replacement cost method-cost approach 17% to 18% 3 to 6 years Tradename 5,800 — 5,800 Relief from royalty-income approach 17% 2 years Contract backlog 5,800 (2,500 ) 3,300 Multi-period excess earnings-income approach 17% 3 years Noncompetition agreements 1,800 — 1,800 With-and-without valuation-income approach 19% 5 years
Business Licenses
Business Acquisition [Line Items]
Summary of Reconciliation of Preliminary Total Consideration	Measurement period adjustments recognized during 2021 related to the finalization of the estimated fair value of the earnout liability and a net working capital adjustment. As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Cash paid at closing $ 64,812 $ — $ 64,812 Fair value of holdbacks 11,415 (306 ) 11,109 Fair value of earnout provision 18,728 (1,328 ) 17,400 Total consideration $ 94,955 $ (1,634 ) $ 93,321
Schedule of Estimated Fair Value of Assets Acquired and Liabilities Assumed	Estimated fair values of the assets acquired and the liabilities assumed in the Business Licenses Purchase as of the acquisition date are provided in the following table (in thousands): As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Assets acquired: Cash and cash equivalents $ 120 $ — $ 120 Trade accounts receivable 1,326 — 1,326 Customer fund assets 1,074 — 1,074 Other current assets 101 — 101 Operating lease right-of-use assets 1,644 — 1,644 Property and equipment 87 — 87 Developed technology, customer relationships, and other intangibles 19,525 — 19,525 Goodwill 73,775 (1,634 ) 72,141 Other noncurrent assets 31 — 31 Total assets acquired 97,683 (1,634 ) 96,049 Liabilities assumed: Accrued expenses 56 — 56 Customer fund obligations 1,028 — 1,028 Operating lease liabilities 1,644 — 1,644 Total liabilities assumed 2,728 — 2,728 Net assets acquired $ 94,955 $ (1,634 ) $ 93,321
Summary of Valuation Methodologies, Significant Assumptions and Estimated Useful Lives	A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the Business Licenses Purchase are provided in the table below (in thousands): Intangible Assigned Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationships $ 15,000 Multi-period excess earnings-income approach 19.5% 6 years Developed technology 3,625 Relief from royalty-income approach and replacement cost method-cost approach 19.5% 1 to 5 years Noncompetition agreements 500 With-and-without valuation-income approach 19.5% 5 years Tradename 400 Relief from royalty-income approach 19.5% 1 year
Impendulo | Fair Value
Business Acquisition [Line Items]
Schedule of Estimated Fair Value of Assets Acquired and Liabilities Assumed	Fair values of the assets acquired and the liabilities assumed in the Impendulo Purchase as of the acquisition date are provided in the following table (in thousands): As Reported December 31, 2020 Measurement Period Adjustment As Adjusted Value Assets acquired: Cash and cash equivalents $ 1,347 $ — $ 1,347 Trade accounts receivable 371 — 371 Other assets 147 — 147 Developed technology, customer relationships, and other intangibles 3,617 — 3,617 Goodwill 10,217 425 10,642 Total assets acquired 15,699 425 16,124 Liabilities assumed: Trade payables and accrued expenses 663 — 663 Deferred revenue and contract liabilities 694 — 694 Deferred tax liability 745 — 745 Total liabilities assumed 2,102 — 2,102 Net assets acquired $ 13,597 $ 425 $ 14,022
Summary of Valuation Methodologies, Significant Assumptions and Estimated Useful Lives	A summary of the valuation methodologies, significant assumptions, and estimated useful lives of acquired intangible assets in the Impendulo Purchase are provided in the table below (in thousands): Intangible Assigned Value Valuation Methodology Discount Rate Estimated Useful Life Customer relationship $ 2,964 Multi-period excess earnings-income approach 20% 6 years Developed technology 616 Relief from royalty-income approach 20% 6 years Tradename 37 Relief from royalty-income approach 20% 1 year

Revenues (Tables)

Revenues (Tables)	12 Months Ended
	Dec. 31, 2021
Revenue From Contract With Customer [Abstract]
Summary of Total Revenues	The following table disaggregates revenue generated within the United States (“U.S.”) from revenue generated from customers outside of the U.S. Revenue for transaction tax compliance in the U.S. is further disaggregated based on the solutions or services purchased by customers. Total revenues consisted of the following (in thousands): For the Year Ended December 31, 2021 2020 2019 Revenue (U.S.): Subscription and returns Tax calculations $ 349,430 $ 257,680 $ 203,584 Tax returns and compliance management 233,420 178,318 127,815 Interest income on funds held from customers 769 829 3,213 Total subscription and returns 583,619 436,827 334,612 Professional services 59,514 32,474 24,399 Total revenue (U.S.) 643,133 469,301 359,011 Total revenue (non-U.S.) 55,844 31,268 23,410 Total revenue $ 698,977 $ 500,569 $ 382,421
Summary of Activity Impacting Contract Liabilities	A summary of the activity impacting the contract liabilities during the years ended December 31, 2021, and 2020 is presented below (in thousands): For the Year Ended December 31, 2021 2020 Contract liabilities: Balance beginning of period $ 10,134 $ 5,197 Contract liabilities transferred to deferred revenue (21,255 ) (11,151 ) Addition to contract liabilities 18,039 16,088 Balance end of period $ 6,918 $ 10,134
Summary of Activity Impacting Deferred Revenue	A summary of the activity impacting deferred revenue balances during the years ended December 31, 2021, and 2020 is presented below (in thousands): For the Year Ended December 31, 2021 2020 Deferred revenue: Balance beginning of period $ 209,690 $ 161,241 Revenue recognized (698,977 ) (500,569 ) Additional amounts deferred 772,242 549,018 Balance end of period $ 282,955 $ 209,690
Summary of Activity Impacting Deferred Commissions	A summary of the activity impacting the deferred commissions during the years ended December 31, 2021, and 2020 is presented below (in thousands): For the Year Ended December 31, 2021 2020 Deferred commissions: Balance beginning of period $ 50,870 $ 38,416 Additional commissions deferred 32,721 23,935 Amortization of deferred commissions (15,072 ) (11,481 ) Balance end of period $ 68,519 $ 50,870

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Finite-lived Intangible Assets	Intangible assets consisted of the following (in thousands) December 31, 2021 Average Useful Life (Years) Gross Accumulated Amortization Net Backlog 3 $ 4,500 $ (1,816 ) $ 2,684 Customer relationships 3 to 10 75,188 (23,795 ) 51,393 Developed technology (1) 3 to 8 72,723 (37,333 ) 35,390 Noncompetition agreements 3 to 5 6,452 (1,725 ) 4,727 Tradename and trademarks 1 to 4 7,267 (4,643 ) 2,624 $ 166,130 $ (69,312 ) $ 96,818 (1 ) Developed technology intangible assets include IPR&D of $0.4M as of December 31, 2021, which is not subject to amortization. December 31, 2020 Average Useful Life (Years) Gross Accumulated Amortization Net Backlog 3 $ 5,800 $ (937 ) $ 4,863 Customer relationships 3 to 10 64,302 (14,890 ) 49,412 Developed technology (1) 3 to 8 52,144 (27,646 ) 24,498 Noncompetition agreements 3 to 5 3,062 (766 ) 2,296 Tradename and trademarks 1 to 4 6,679 (1,235 ) 5,444 $ 131,987 $ (45,474 ) $ 86,513 (1 ) Developed technology intangible assets include IPR&D of $0.6M as of December 31, 2020, which is not subject to amortization.
Schedule of Future Amortization Expense Related to Finite-lived Intangible Assets	Future amortization expense as of December 31, 2021, related to these finite-lived intangible assets subject to amortization is expected to be as follows (in thousands): Years Ending December 31 2022 $ 27,230 2023 22,026 2024 17,285 2025 14,319 2026 10,959 Thereafter 4,599 $ 96,418
Schedule of Changes in Carrying Amount of Goodwill	Changes in the carrying amount of goodwill are summarized as follows (in thousands): Balance—December 31, 2019 $ 101,224 Additions - 2020 acquisitions (1) 411,031 Cumulative translation adjustments 979 Balance—December 31, 2020 513,234 Measurement period adjustment - 2020 acquisitions (1) 7,317 Additions - 2021 acquisitions (1) 153,876 Cumulative translation adjustments (2,046 ) Balance—December 31, 2021 $ 672,381 (1) See Note 5 for measurement period adjustment and additions details

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Summary of Future Lease Payments for Long-Term Operating Leases	The following table presents future lease payments for long-term operating leases as of December 31, 2021 (in thousands): Period Operating Lease Commitments 2022 $ 14,824 2023 14,121 2024 12,767 2025 10,117 2026 6,789 Thereafter 8,288 Total 66,906 Less: Imputed interest (9,839 ) Total operating lease liabilities (1) $ 57,067 (1) Future lease payments have not been reduced by future sublease receipts of $0.8 million due under noncancelable subleases.
Summary of Supplemental Balance Sheet Information	The following table presents supplemental balance sheet information related to operating leases recorded as of December 31, 2021, and 2020: December 31, 2021 December 31, 2020 Weighted average remaining lease term (in years) 5.0 5.8 Weighted average discount rate 6.5 % 6.6 %
Summary of the Components of Lease Expense	The components of lease expense for the years ended December 31, 2021, 2020 and 2019 were as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Operating lease costs $ 13,501 $ 12,766 $ 9,329 Variable lease costs 3,617 2,948 2,562 Short-term lease costs 846 1,722 1,065 Sublease income (1,541 ) (1,534 ) (1,448 ) Total lease cost, net $ 16,423 $ 15,902 $ 11,508

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Summary of Net Carrying Amount of Notes	The net carrying amount of the 2026 Notes was as follows: December 31, 2021 (in thousands) Principal $ 977,500 Unamortized debt issuance costs (16,241 ) Net carrying amount $ 961,259
Summary of Interest Expense Recognized	The following table sets forth the interest expense recognized related to the 2026 Notes: For the Year Ended December 31, 2021 (in thousands) Contractual interest expense $ 944 Amortization of debt issuance costs 1,367 Total interest expense related to 2026 Notes $ 2,311

Equity Incentive Plans (Tables)

Equity Incentive Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Summary of Stock-Based Compensation Expense Related to Equity Incentive Rewards	The Company recognized total stock-based compensation cost related to equity incentive awards as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Stock-based compensation cost: Stock options $ 11,966 $ 15,402 $ 16,489 Restricted stock units 57,116 29,181 14,585 Performance share units 16,011 — — Employee stock purchase plan 4,595 3,987 3,326 Total stock-based compensation cost $ 89,688 $ 48,570 $ 34,400
Summary of Stock Option Activity	The following table summarizes stock option activity for the Company’s stock-based compensation plans for 2021: Weighted Weighted Average Aggregate Average Remaining Intrinsic Exercise Contractual Value Shares Price Life (in Years) (in thousands) Options outstanding as of January 1, 2021 3,537,014 $ 28.17 6.89 $ 483,577 Options granted — $ — Options exercised (1,223,395 ) $ 17.80 Options cancelled or expired (34,830 ) $ 42.24 Options outstanding as of December 31, 2021 2,278,789 $ 33.52 6.30 $ 217,824 Options exercisable as of December 31, 2021 1,753,067 $ 27.80 5.97 $ 177,609
Summary of Options Outstanding and Vested by Range of Exercise Prices	A summary of options outstanding and vested as of December 31, 2021 Options Outstanding Options Vested and Exercisable Exercise Number Weighted Average Number Vested Weighted Average Prices Outstanding Life (in Years) and Exercisable Life (in Years) $1.90 to $6.40 18,612 1.1 18,612 1.1 $8.04 to $11.72 72,717 2.3 72,717 2.3 $12.20 to $15.06 380,304 4.7 380,304 4.7 $16.06 to $24.00 706,791 6.1 639,948 6.1 $31.99 to $42.21 655,237 7.0 441,953 7.0 $55.10 to $99.65 410,736 7.8 185,749 7.8 $124.35 to $151.76 34,392 7.8 13,784 6.5 2,278,789 1,753,067
Summary of Fair Value Estimated Using Black-Scholes Option Pricing Model Assumptions	For the options granted during the periods presented, the fair value was estimated using the Black-Scholes option-pricing model with the following assumptions: For the Year Ended December 31, 2021 2020 2019 Fair market value of common stock — $66.26 - $151.76 $39.76 - $79.25 Volatility — 43% - 44% 40% Expected term — 5-6 years 5-6 years Expected dividend yield — n/a n/a Risk-free interest rate — 0.33% - 1.25% 1.68% - 2.65%
Summary of RSU Activity	The following table summarizes RSU activity for the Company’s stock-based compensation plans for 2021: Weighted Average Grant Date Fair Restricted Stock Units Value Per Share RSUs outstanding as of January 1, 2021 2,359,063 $ 70.17 RSUs granted 1,282,177 $ 138.79 RSUs vested (524,246 ) $ 68.36 RSUs cancelled (255,031 ) $ 90.66 RSUs outstanding as of December 31, 2021 2,861,963 $ 99.41
Summary of PSU Activity	The following table summarizes PSU activity for the Company’s stock-based compensation plans for 2021: Weighted Average Performance Share Grant Date Fair Units Value Per Share PSUs outstanding as of January 1, 2021 — $ — PSUs granted 120,632 $ 147.39 PSUs vested — $ — PSUs cancelled (5,742 ) $ 150.00 PSUs outstanding as of December 31, 2021 114,890 $ 147.26
2018 Employee Stock Purchase Plan
Summary of Fair Value Estimated Using Black-Scholes Option Pricing Model Assumptions	For the years ended December 31, 2021 For the Year Ended December 31, 2021 2020 2019 Fair market value of common stock $152.35 to $166.84 $87.23 to $138.83 $40.60 to $82.12 Volatility 31% to 34% 32% to 49% 40% Expected term 0.5 years 0.5 years 0.5 years Expected dividend yield n/a n/a n/a Risk-free interest rate 0.06% to 0.08% 0.11% to 1.54% 2.04% to 2.59%

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of Domestic and Foreign Components of Loss Before Income Tax	Domestic and foreign components of loss before income tax are as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Domestic $ (93,556 ) $ (34,483 ) $ (30,272 ) Foreign (28,369 ) (23,009 ) (18,987 ) Total $ (121,925 ) $ (57,492 ) $ (49,259 )
Schedule of Components of the Income Tax (Provision) Benefit	Major components of the income tax (provision) benefit are as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Current: Federal $ — $ — $ — State — — — Foreign (2,180 ) (1,110 ) (1,178 ) Total current income tax provision (2,180 ) (1,110 ) (1,178 ) Deferred: Federal (1,746 ) 6,790 (90 ) State (526 ) 1,657 (53 ) Foreign 1,144 972 366 Total deferred income tax (provision) benefit (1,128 ) 9,419 223 Total $ (3,308 ) $ 8,309 $ (955 )
Schedule of Major Differences Between U.S Statutory Rate and Effective Tax Rate	Major differences between the U.S. statutory rate of 21% and the effective tax rate are as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Tax at statutory rate $ 25,601 $ 12,073 $ 10,345 State taxes 4,462 1,349 1,941 Research and development credits 3,993 2,960 2,285 Stock-based compensation 47,602 56,766 67,718 Impact of foreign operations 2,740 342 (1,373 ) Change in valuation allowance (85,842 ) (65,485 ) (80,284 ) Other (1,864 ) 304 (1,587 ) Total $ (3,308 ) $ 8,309 $ (955 )
Schedule of Significant Components of Deferred Tax Assets and Liabilities	Significant components of the Company’s deferred tax assets and liabilities are as follows (in thousands): December 31, 2021 2020 Deferred tax assets: Net operating loss carryforward $ 315,482 $ 240,048 Stock-based compensation 18,400 10,484 Deferred revenue 682 — Research and development credit, net of uncertain tax position reserve 13,543 9,284 Operating lease liabilities 14,498 16,237 Other 14,191 11,016 Total deferred tax assets 376,796 287,069 Deferred tax liabilities: Deferred commissions (17,208 ) (12,288 ) Operating lease right-of-use assets (11,331 ) (12,243 ) Property and equipment (6,625 ) (4,458 ) Definite-lived intangibles (5,073 ) (8,278 ) Indefinite-lived intangibles (4,433 ) (3,127 ) Deferred revenue — (322 ) Other (86 ) (193 ) Total deferred tax liabilities (44,756 ) (40,909 ) Net deferred tax assets before valuation allowance 332,040 246,160 Valuation allowance (335,952 ) (246,598 ) Net deferred tax liability $ (3,912 ) $ (438 )
Schedule of Net Operating Loss and Research Credit Carryforwards	The following tables summarizes the Company's net operating loss and research credit carryforwards (dollars in thousands): December 31, 2021 Year Expiration Begins (if not utilized) Federal net operating loss carryforwards generated 2017 and prior $ 288,052 2025 Federal net operating loss carryforwards generated after 2017 857,522 Non-expiring Total Federal net operating loss carryforwards 1,145,574 State net operating loss carryforwards 790,264 2022 Foreign net operating loss carryforwards 110,463 Non-expiring Federal research & development credits 21,890 2030 State research & development credits 1,191 2040 Foreign research & development credits 378 2039
Schedule of Reconciliation of Unrecognized Tax Benefits	A reconciliation of the beginning and ending balances for unrecognized tax benefits is as follows (in thousands): For the Year Ended December 31, 2021 2020 2019 Balance at January 1 $ 7,029 $ 5,210 $ 4,118 Additions for tax positions related to the current year 2,081 1,799 1,435 Additions for tax positions related to prior years 23 20 — Reductions for tax positions related to prior years — — (343 ) Reductions related to settlements — — — Reductions related to a lapse of statute — — — Balance at December 31 $ 9,133 $ 7,029 $ 5,210

Net Loss Per Share Attributab_2

Net Loss Per Share Attributable to Common Shareholders (Tables)	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Schedule of Computation of Basic and Diluted Net Loss Per Common Share	The following table sets forth the computation of basic and diluted net loss per common share (in thousands, except per share data): For the Year Ended December 31, 2021 2020 2019 Numerator: Net loss attributable to common shareholders $ (125,233 ) $ (49,183 ) $ (50,214 ) Denominator: Weighted-average common shares outstanding-basic 86,263 80,985 73,345 Dilutive effect of share equivalents resulting from stock options, RSUs, PSUs, ESPP shares, and convertible senior notes (if converted) — — — Weighted-average common shares outstanding-diluted 86,263 80,985 73,345 Net loss per common share, basic and diluted $ (1.45 ) $ (0.61 ) $ (0.68 )
Schedule of Potential Shares Not Included in the Computation of Diluted Earnings Per Share	The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to common shareholders for the periods presented because the impact of including them would have been antidilutive (in thousands): Year Ended December 31, 2021 2020 2019 Options to purchase common shares 2,905 4,653 7,987 Unvested RSUs 2,635 2,091 1,157 Unvested PSUs 108 — — ESPP shares 10 10 13 Convertible senior notes (if converted) 1,584 — — Total 7,242 6,754 9,157

Significant Accounting Polici_4

Significant Accounting Policies - Additional Information (Details)	Oct. 31, 2018USD ($)	Dec. 31, 2021USD ($)Segment	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Aug. 31, 2021USD ($)
Accounting Policies [Line Items]
Number of operating segment | Segment		1
Net loss		$ (125,233,000)	$ (49,183,000)	$ (50,214,000)
Accumulated deficit		(684,610,000)	(559,377,000)
Cash and cash equivalents		1,514,064,000	673,593,000	466,950,000
Credit impairment losses recognized		0	0
Implementation cost capitalized		4,200,000	3,100,000
Implementation cost, impairment charge		700,000	0
Capitalized software development Costs		16,600,000	4,200,000	2,300,000
Impairment of operating lease right-of-use assets and related property and equipment			794,000
Impairment of long-lived assets		0
Goodwill impairment	$ 0	0	0	0
Income/expenses from increases decreases in fair value of earnout liabilities related to business combinations		$ 12,200,000	(2,300,000)	(1,000,000)
Tax position likely of being realized upon ultimate settlement		greater than 50%
Percentage of likelihood of realization of tax position upon ultimate settlement, minimum		50.00%
Contract payment net terms		30 days
Concessions and cancellations period allowed for standard subscription contract prior to adoption		60 days
Revenue recognition, contractual renewal period		1 year
Partner commissions expense		$ 40,000,000	30,200,000	22,000,000
Advertising expenses		35,500,000	24,300,000	20,200,000
Contribution to 401(k) plan		5,400,000	$ 3,600,000	$ 3,800,000
2026 Notes
Accounting Policies [Line Items]
Principal amount		$ 977,500,000			$ 977,500,000
Fixed interest rate					0.25%
Minimum
Accounting Policies [Line Items]
Revenue recognition initial contractual term		12 months
Minimum | Internally Developed Software
Accounting Policies [Line Items]
Property and equipment, Useful Life		3 years
Maximum
Accounting Policies [Line Items]
Revenue recognition initial contractual term		18 months
Maximum | Internally Developed Software
Accounting Policies [Line Items]
Property and equipment, Useful Life		6 years
Geographic Concentration Risk | Non-US | Revenue
Accounting Policies [Line Items]
Concentration risk		8.00%	6.00%	6.00%
Geographic Concentration Risk | Non-US | Long-lived Assets
Accounting Policies [Line Items]
Concentration risk		25.00%	27.00%
Geographic Concentration Risk | United Kingdom | Long-lived Assets
Accounting Policies [Line Items]
Concentration risk		9.00%	9.00%
Geographic Concentration Risk | India | Long-lived Assets
Accounting Policies [Line Items]
Concentration risk		12.00%	15.00%
Customer Concentration Risk | Revenue | Maximum
Accounting Policies [Line Items]
Concentration risk		10.00%	10.00%
Customer Concentration Risk | Accounts Receivable | Maximum
Accounting Policies [Line Items]
Concentration risk		10.00%	10.00%

Significant Accounting Polici_5

Significant Accounting Policies - Allowance For Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for Doubtful Accounts [Roll Forward]
Balance at the beginning of the year	$ 3,983
Balance at the end of the year	5,803	$ 3,983
Balance at the beginning of the year	593
Balance at the end of the year	439	593
Trade Accounts Receivable
Allowance for Doubtful Accounts [Roll Forward]
Balance at the beginning of the year	3,983	1,179	$ 521
Additions	4,587	4,412	1,201
Write-offs	(2,767)	(1,608)	(543)
Balance at the end of the year	5,803	3,983	1,179
Receivables From Customers
Allowance for Doubtful Accounts [Roll Forward]
Balance at the beginning of the year	593	270	198
Charged to expense	290	693	166
Write-offs	(444)	(370)	(94)
Balance at the end of the year	$ 439	$ 593	$ 270

Significant Accounting Polici_6

Significant Accounting Policies - Summary of Funds Held from Customers and Customer Fund Obligations Held by Company and by Customer Trust (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Funds held from customers (current assets):
Funds held from customers	$ 62,509	$ 30,598
Customer fund obligations (current liabilities):
Customer fund obligations	64,302	31,549
Restricted Cash Equivalents
Funds held from customers (current assets):
Funds held from customers	13	$ 30,598
Restricted Cash Equivalents | Customer Trust
Funds held from customers (current assets):
Funds held from customers	62,126
Available-for-sale Securities | Customer Trust
Funds held from customers (current assets):
Funds held from customers	$ 370

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring Basis - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Earnouts Related to Business Combinations
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value, Liabilities	$ 113,978	$ 34,501
Significant Unobservable Inputs (Level 3) | Earnouts Related to Business Combinations
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value, Liabilities	113,978	34,501
Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value, Assets	1,439,522	649,603
Money Market Funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value, Assets	1,439,522	$ 649,603
U.S. Treasury Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value, Available-for-sale securities	370
U.S. Treasury Securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value, Available-for-sale securities	$ 370

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Assumptions Used to Calculate the Estimated Earnout Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Estimated earnout liabilities	$ 113,978	$ 34,468
CrowdReason LLC and CorrelationAdvisors
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Year of Acquisition	2021
Earnout Target	Specific revenue growth thresholds through October 2024, a cap of $30.0 million is available; to be settled in cash.
Method	Probability-weighted discounted cash flows and Monte Carlo simulation
Earnout Period	2024
Discount Rate	3.50%
Estimated earnout liabilities	$ 26,320
Track1099 LLC
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Year of Acquisition	2021
Earnout Target	Specific revenue growth thresholds through April 2023, with a cap of $12.5 million; to be settled in cash.
Method	Probability-weighted discounted cash flows and Monte Carlo simulation
Earnout Period	2023
Discount Rate	4.00%
Estimated earnout liabilities	$ 7,880
Davo Technologies LLC
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Year of Acquisition	2021
Earnout Target	Specific revenue growth thresholds through March 2023, with no cap; to be settled in cash.
Method	Probability-weighted discounted cash flows and Monte Carlo simulation
Earnout Period	2023
Discount Rate	7.00%
Estimated earnout liabilities	$ 35,885
Transaction Tax Resources, Inc.
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Year of Acquisition	2020
Earnout Target	Specific revenue growth thresholds through December 2022, with cap of $26.4 million; to be settled in cash.
Method	Probability-weighted discounted cash flows and Monte Carlo simulation
Earnout Period	2022
Discount Rate	15.00%
Estimated earnout liabilities	$ 24,830	15,740
Business Licenses
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Year of Acquisition	2020
Earnout Target	Achievement of certain performance metrics through November 2024, with cap of $20.7 million; to be settled in common stock.
Method	Scenario-based approach
Earnout Period	2024
Discount Rate	4.80%
Estimated earnout liabilities	$ 19,063	$ 18,728

Fair Value Measurements - Sum_2

Fair Value Measurements - Summary of Assumptions Used to Calculate the Estimated Earnout Liabilities (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2021USD ($)
CrowdReason LLC and CorrelationAdvisors
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout target, capital available to be settled in cash	$ 30,000,000
Earnout target, specific revenue growth thresholds period	2024-10
Track1099 LLC
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout target, capital available to be settled in cash	$ 12,500,000
Earnout target, specific revenue growth thresholds period	2023-04
Davo Technologies LLC
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout target, capital available to be settled in cash	$ 0
Earnout target, specific revenue growth thresholds period	2023-03
Transaction Tax Resources, Inc.
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout target, capital available to be settled in cash	$ 26,400,000
Earnout target, specific revenue growth thresholds period	2022-12
Business Licenses
Summary Of Assumptions Used To Calculate Estimated Earnout Liabilities [Line Items]
Earnout target, capital available to be settled in cash	$ 20,700,000
Earnout target, specific revenue growth thresholds period	2024-11

Fair Value Measurements - Sum_3

Fair Value Measurements - Summary of Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnout liabilities related to business combinations:
Fair value changes included in other expense (income), net	$ (12,200)	$ 2,300	$ 1,000
Recurring Basis | Significant Unobservable Inputs (Level 3) | Earnout Related to Acquisitions
Earnout liabilities related to business combinations:
Balance beginning of period	34,501	13,808
Fair value recorded at acquisition	64,486	34,468
Measurement period adjustments	2,793	0
Payments of earnout liabilities	(33)	(11,450)
Fair value changes included in other expense (income), net	12,231	(2,325)
Balance end of period	$ 113,978	$ 34,501	$ 13,808

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021
2026 Notes | Significant Other Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Principal amount		$ 977,500,000
Estimated fair value		$ 909,000,000
Fair Value, Measurements, Non-Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Operating lease right-of-use assets, associated carrying value reduced	$ 0
Fair Value, Measurements, Non-Recurring | United States
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Operating lease, impairment loss	500,000
Fair Value, Measurements, Non-Recurring | Canada
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Operating lease, impairment loss	$ 300,000
Estimated future cash flows discount rate	8.00%

Balance Sheet Detail - Property

Balance Sheet Detail - Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 84,768	$ 63,772
Accumulated depreciation	(38,304)	(29,059)
Property and equipment—net	46,464	34,713
Computer Equipment and Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 19,923	15,749
Computer Equipment and Software | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	3 years
Computer Equipment and Software | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	5 years
Internally Developed Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 27,099	10,438
Internally Developed Software | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	3 years
Internally Developed Software | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	6 years
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 6,425	6,651
Property and equipment, Useful Life	5 years
Office Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1,275	1,006
Office Equipment | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	3 years
Office Equipment | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	5 years
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 30,046	$ 29,928
Leasehold Improvements | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	1 year
Leasehold Improvements | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Useful Life	10 years

Balance Sheet Detail - Addition

Balance Sheet Detail - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]
Depreciation expense	$ 12.4	$ 9.6	$ 8.7

Balance Sheet Detail - Prepaid

Balance Sheet Detail - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Prepaid Expense And Other Assets Current [Abstract]
Licenses and subscriptions	$ 14,511	$ 6,348
Prepaid and other current taxes	3,132	2,308
Deposits	3,746	4,570
Prepaid employee related expenses	2,780	1,516
Prepaid cloud computing implementation costs	1,708	340
Other	3,390	5,016
Total	$ 29,267	$ 20,098

Balance Sheet Detail - Accrued

Balance Sheet Detail - Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accrued Liabilities Current [Abstract]
Accrued bonus	$ 40,853	$ 29,518
Accrued partner commissions	13,088	9,173
Accrued payroll and related taxes	10,208	7,903
Employee stock purchase plan contributions	7,113	5,927
Accrued sales commissions	7,007	5,563
Contract liabilities	6,918	10,134	$ 5,197
Accrued federal, state, local, and foreign taxes	3,926	4,338
Self-insurance reserves	2,401	1,563
Accrued interest payable	944	0
Other	17,334	10,413
Total	$ 109,792	$ 84,532

Acquisitions of Businesses - Ad

Acquisitions of Businesses - Additional Information (Details) $ / shares in Units, € in Millions	Oct. 18, 2021USD ($)	Oct. 01, 2021USD ($)	Sep. 07, 2021USD ($)	Jun. 30, 2021USD ($)	Apr. 20, 2021USD ($)	Apr. 01, 2021USD ($)shares	Apr. 01, 2021EUR (€)shares	Dec. 31, 2020USD ($)	Dec. 01, 2020USD ($)	Nov. 05, 2020USD ($)	Oct. 05, 2020USD ($)	Jul. 31, 2019USD ($)OperatingMetric$ / sharesshares	Feb. 06, 2019USD ($)	Jan. 22, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2020USD ($)	Sep. 30, 2021USD ($)	Jun. 30, 2021USD ($)	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)shares	Jan. 22, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2022USD ($)	Jan. 10, 2019USD ($)
Business Acquisition [Line Items]
Goodwill								$ 513,234,000							$ 513,234,000	$ 513,234,000				$ 513,234,000	$ 513,234,000		$ 672,381,000	$ 513,234,000	$ 672,381,000	$ 672,381,000	$ 513,234,000		$ 101,224,000
Revenues																										698,977,000	500,569,000		382,421,000
Loss before income taxes																										(121,925,000)	(57,492,000)		(49,259,000)
Accrued value of earnout related to acquisition								34,468,000							34,468,000	34,468,000				34,468,000	34,468,000		67,280,000	34,468,000	67,280,000	67,280,000	34,468,000		15,351,000
Amortization of Intangible Assets																										24,100,000	10,700,000		$ 7,100,000
Earnout liability								749,000							749,000	749,000				749,000	749,000		33,151,000	749,000	33,151,000	33,151,000	749,000
Inposia
Business Acquisition [Line Items]
Acquisition-related costs						$ 1,500,000																		1,000,000		$ 500,000
Total consideration transferred				$ 37,642,000		37,400,000	€ 31.8																37,427,000
Cash received on net working capital adjustments																	$ 200,000
Consideration in cash				14,671,000		$ 12,200,000											$ 14,500,000				2,400,000		14,456,000
Common stock paid at acquisition closing | shares						164,416	164,416
Common stock consideration						$ 23,000
Term of releasing shares issued are held in escrow																										18 months
Fair value discount rate based on estimated pre-tax cost of debt						4.00%	4.00%
Weighted average amortization period for intangibles						6 years 2 months 12 days	6 years 2 months 12 days
Goodwill						$ 26,500,000
Revenues																										$ 6,000,000
Loss before income taxes																										$ (2,400,000)
Inposia | Developed Technology
Business Acquisition [Line Items]
Developed technology, customer relationships, and other intangibles						$ 9,572,000
Inposia | Minimum
Business Acquisition [Line Items]
Term of releasing shares issued are held in escrow																										9 months
Davo Technologies LLC
Business Acquisition [Line Items]
Acquisition-related costs					$ 100,000
Total consideration transferred				55,038,000	56,700,000																		56,747,000
Consideration in cash				23,818,000	$ 23,500,000														$ 300,000				23,818,000
Weighted average amortization period for intangibles					5 years 4 months 24 days
Goodwill					$ 51,900,000
Revenues																									2,200,000
Loss before income taxes																									(2,000,000)
Acquisition holdbacks with a fair value upon acquisition				2,600,000	2,600,000													$ 2,600,000					2,591,000		2,591,000	$ 2,591,000
Accrued value of earnout related to acquisition				28,620,000	30,300,000													28,620,000					30,338,000		30,338,000	$ 30,338,000
Business combination, additional cash to be paid, as consideration, during eighteen months following acquisition date					2,600,000
Davo Technologies LLC | Developed Technology
Business Acquisition [Line Items]
Developed technology, customer relationships, and other intangibles				$ 1,800,000	$ 1,950,000													1,800,000
3CE Technologies, Inc.
Business Acquisition [Line Items]
Total consideration transferred			$ 11,200,000
Consideration in cash			9,900,000
Goodwill			3,700,000
Acquisition holdbacks with a fair value upon acquisition			1,300,000
Business acquisition, effective date of acquisition																										Sep. 7, 2021
Developed technology, customer relationships, and other intangibles			$ 7,100,000
Track1099 LLC
Business Acquisition [Line Items]
Acquisition-related costs		$ 100,000
Total consideration transferred		48,800,000																								$ 48,804,000
Consideration in cash		35,000,000																								35,000,000
Goodwill		43,000,000
Acquisition holdbacks with a fair value upon acquisition		5,000,000																					4,984,000		4,984,000	4,984,000
Accrued value of earnout related to acquisition		8,800,000																					8,820,000		8,820,000	8,820,000
Additional cash to be paid, as consideration, in twenty seven months		5,000,000
Maximum payout earned		12,500,000
Minimum payout earned		$ 6,250,000
Earnout arrangement term		12 months
Track1099 LLC | Developed Technology
Business Acquisition [Line Items]
Developed technology, customer relationships, and other intangibles		$ 1,250,000
CrowdReason LLC and CorrelationAdvisors
Business Acquisition [Line Items]
Acquisition-related costs	$ 200,000
Total consideration transferred	36,400,000																									36,364,000
Consideration in cash	8,300,000																									8,317,000
Goodwill	25,400,000
Acquisition holdbacks with a fair value upon acquisition	1,700,000																						1,727,000		1,727,000	1,727,000
Accrued value of earnout related to acquisition	26,300,000																						26,320,000		26,320,000	26,320,000
Maximum payout earned	40,000,000
Additional cash to be paid, as consideration, in eighteen months	1,700,000
CrowdReason LLC and CorrelationAdvisors | Developed Technology
Business Acquisition [Line Items]
Developed technology, customer relationships, and other intangibles	$ 3,900,000
Transaction Tax Resources, Inc.
Business Acquisition [Line Items]
Acquisition-related costs											$ 1,000,000
Total consideration transferred								367,234,000			370,100,000															370,148,000
Consideration in cash								294,017,000			$ 294,000,000															294,017,000
Weighted average amortization period for intangibles											4 years 8 months 12 days
Goodwill											$ 335,600,000
Revenues																				4,500,000
Loss before income taxes																				(3,200,000)
Acquisition holdbacks with a fair value upon acquisition								57,477,000			57,300,000				57,477,000	57,477,000				57,477,000	57,477,000		57,260,000	57,477,000	57,260,000	57,260,000	57,477,000
Accrued value of earnout related to acquisition								15,740,000			18,900,000				15,740,000	15,740,000				15,740,000	15,740,000		18,871,000	15,740,000	18,871,000	18,871,000	15,740,000
Maximum payout earned											26,400,000
Minimum payout earned											$ 0
Risk-free discount rate											0.13%
Earnout payable period											2023-02
Carrying amount of trade accounts receivable											$ 7,200,000
Recorded fair value of acquisition											$ 6,000,000
Risk adjusted discount rate											3.50%
Acquisition holdback liability																							19,900,000		19,900,000	19,900,000
Additional accrued cash payable to sellers																		$ 18,800,000	800,000
Amortization of Intangible Assets																				3,500,000
Transaction Tax Resources, Inc. | Developed Technology
Business Acquisition [Line Items]
Weighted average amortization period for intangibles											4 years
Transaction Tax Resources, Inc. | Revenue Growth Performance Metrics
Business Acquisition [Line Items]
Maximum payout earned																							26,400,000		26,400,000	26,400,000
Transaction Tax Resources, Inc. | Forecast | Revenue Growth Performance Metrics
Business Acquisition [Line Items]
Maximum payout earned																														$ 26,400,000
Transaction Tax Resources, Inc. | Cash to be Paid Up to Three Years Following Acquisition
Business Acquisition [Line Items]
Acquisition holdbacks with a fair value upon acquisition											$ 57,300,000
Business Licenses
Business Acquisition [Line Items]
Acquisition-related costs																											500,000
Total consideration transferred										$ 93,300,000																93,321,000	94,955,000
Consideration in cash										$ 64,800,000																64,812,000	64,812,000
Weighted average amortization period for intangibles										5 years 3 months 18 days
Goodwill								73,775,000		$ 72,141,000					73,775,000	73,775,000				73,775,000	73,775,000			73,775,000			73,775,000
Revenues																1,800,000
Loss before income taxes																(600,000)
Acquisition holdbacks with a fair value upon acquisition								11,415,000		11,100,000					11,415,000	11,415,000				11,415,000	11,415,000		11,109,000	11,415,000	11,109,000	11,109,000	11,415,000
Accrued value of earnout related to acquisition								18,728,000		17,400,000					18,728,000	18,728,000				18,728,000	18,728,000		$ 17,400,000	18,728,000	$ 17,400,000	$ 17,400,000	18,728,000
Developed technology, customer relationships, and other intangibles								19,525,000		19,525,000					19,525,000	19,525,000				19,525,000	19,525,000			19,525,000			19,525,000
Maximum payout earned										20,700,000
Minimum payout earned										$ 0
Risk-free discount rate										0.13%
Amortization of Intangible Assets																700,000
Business Licenses | Developed Technology
Business Acquisition [Line Items]
Weighted average amortization period for intangibles										3 years 1 month 6 days
Developed technology, customer relationships, and other intangibles										$ 3,625,000
Business Licenses | Operating Performance Metrics | Common Stock
Business Acquisition [Line Items]
Maximum payout earned										20,700,000
Business Licenses | After Eighteen Months from Closing of Acquisition
Business Acquisition [Line Items]
Acquisition holdbacks with a fair value upon acquisition										$ 11,100,000
Impendulo
Business Acquisition [Line Items]
Acquisition-related costs									$ 600,000
Total consideration transferred									14,000,000
Consideration in cash									$ 11,700,000
Weighted average amortization period for intangibles									5 years 10 months 24 days
Goodwill									$ 10,600,000
Revenues															200,000
Loss before income taxes															(100,000)
Amortization of Intangible Assets															100,000
Impendulo | Measurement Period [Member]
Business Acquisition [Line Items]
Working capital adjustment																			400,000
Impendulo | Common Stock
Business Acquisition [Line Items]
Common stock consideration									$ 1,200,000
Impendulo | Final Revenue Metrics
Business Acquisition [Line Items]
Additional accrued cash payable to sellers																			$ 1,100,000
Compli, Inc.
Business Acquisition [Line Items]
Total consideration transferred														$ 17,100,000
Consideration in cash														11,800,000														$ 1,600,000
Goodwill																															$ 12,800,000
Accrued value of earnout related to acquisition														3,800,000
Maximum payout earned														$ 4,000,000
Earnout recognized at fair value paid																						$ 4,000,000
Indix Corporation
Business Acquisition [Line Items]
Total consideration transferred													$ 9,100,000
Consideration in cash													5,500,000
Goodwill													5,000,000
Accrued value of earnout related to acquisition													2,200,000
Maximum payout earned													3,000,000
Additional cash to be paid, as consideration, after eighteen months													1,400,000
Indix Corporation | Within Three Months from Closing Date of Acquisition
Business Acquisition [Line Items]
Maximum payout earned													500,000
Indix Corporation | Within Seven Months from Closing Date of Acquisition
Business Acquisition [Line Items]
Maximum payout earned													650,000
Indix Corporation | Within 8 Months from Closing Date of Acquisition
Business Acquisition [Line Items]
Maximum payout earned													650,000
Indix Corporation | Within 12 Months from Closing Date of Acquisition
Business Acquisition [Line Items]
Maximum payout earned													$ 1,200,000
Portway International, Inc
Business Acquisition [Line Items]
Acquisition-related costs																											200,000
Total consideration transferred												$ 24,300,000
Consideration in cash												13,000,000
Common stock consideration																											7,500,000
Goodwill												22,400,000
Accrued value of earnout related to acquisition												9,400,000
Maximum payout earned												10,000,000
Additional cash to be paid, as consideration, after eighteen months												2,000,000
Acquisition date fair value of cash consideration												$ 1,900,000
Share price of common shares that could be earned and transferred to seller | $ / shares												$ 83.97
Business combination number of operating metric targets used in earnout payment | OperatingMetric												2
Earnout liability								$ 0							$ 0	$ 0				$ 0	$ 0			$ 0			$ 0
Portway International, Inc | Operating Metrics Targets
Business Acquisition [Line Items]
Maximum payout earned												$ 7,500,000
Portway International, Inc | Revenue Targets
Business Acquisition [Line Items]
Maximum payout earned												$ 2,500,000
Portway International, Inc | Operating Metrics Targets One
Business Acquisition [Line Items]
Common stock transferred, shares | shares																											89,318
Common stock transferred, value																											$ 7,500,000
Portway International, Inc | Maximum | Common Stock
Business Acquisition [Line Items]
Common stock paid at acquisition closing | shares												119,090

Acquisitions of Businesses - Su

Acquisitions of Businesses - Summary of Reconciliation of Preliminary Total Consideration (Details) $ in Thousands, € in Millions	Oct. 18, 2021USD ($)	Oct. 01, 2021USD ($)	Jun. 30, 2021USD ($)	Apr. 20, 2021USD ($)	Apr. 01, 2021USD ($)	Apr. 01, 2021EUR (€)	Dec. 31, 2020USD ($)	Nov. 05, 2020USD ($)	Oct. 05, 2020USD ($)	Sep. 30, 2021USD ($)	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Business Acquisition [Line Items]
Accrued value of earnout related to acquisition							$ 34,468					$ 34,468	$ 67,280	$ 67,280	$ 34,468	$ 15,351
Inposia
Business Acquisition [Line Items]
Consideration in cash			$ 14,671		$ 12,200					$ 14,500		2,400	14,456
Fair value of common stock issued at closing			22,971										22,971
Total consideration			37,642		$ 37,400	€ 31.8							37,427
Inposia | Restatement Adjustment
Business Acquisition [Line Items]
Consideration in cash													(215)
Total consideration													(215)
Davo Technologies LLC
Business Acquisition [Line Items]
Consideration in cash			23,818	$ 23,500							$ 300		23,818
Acquisition holdbacks with a fair value upon acquisition			2,600	2,600									2,591	2,591
Accrued value of earnout related to acquisition			28,620	30,300									30,338	30,338
Total consideration			$ 55,038	$ 56,700									56,747
Davo Technologies LLC | Restatement Adjustment
Business Acquisition [Line Items]
Acquisition holdbacks with a fair value upon acquisition													(9)	(9)
Accrued value of earnout related to acquisition													1,718	1,718
Total consideration													1,709
Track1099 LLC
Business Acquisition [Line Items]
Consideration in cash		$ 35,000												35,000
Acquisition holdbacks with a fair value upon acquisition		5,000											4,984	4,984
Accrued value of earnout related to acquisition		8,800											8,820	8,820
Total consideration		$ 48,800												48,804
CrowdReason LLC and CorrelationAdvisors
Business Acquisition [Line Items]
Consideration in cash	$ 8,300													8,317
Acquisition holdbacks with a fair value upon acquisition	1,700												1,727	1,727
Accrued value of earnout related to acquisition	26,300												26,320	26,320
Total consideration	$ 36,400													36,364
Transaction Tax Resources, Inc.
Business Acquisition [Line Items]
Consideration in cash							294,017		$ 294,000					294,017
Acquisition holdbacks with a fair value upon acquisition							57,477		57,300			57,477	57,260	57,260	57,477
Accrued value of earnout related to acquisition							15,740		18,900			15,740	18,871	18,871	15,740
Total consideration							367,234		$ 370,100					370,148
Transaction Tax Resources, Inc. | Restatement Adjustment
Business Acquisition [Line Items]
Acquisition holdbacks with a fair value upon acquisition													(217)	(217)
Accrued value of earnout related to acquisition													3,131	3,131
Total consideration														2,914
Business Licenses
Business Acquisition [Line Items]
Consideration in cash								$ 64,800						64,812	64,812
Acquisition holdbacks with a fair value upon acquisition							11,415	11,100				11,415	11,109	11,109	11,415
Accrued value of earnout related to acquisition							$ 18,728	17,400				$ 18,728	17,400	17,400	18,728
Total consideration								$ 93,300						93,321	$ 94,955
Business Licenses | Restatement Adjustment
Business Acquisition [Line Items]
Acquisition holdbacks with a fair value upon acquisition													(306)	(306)
Accrued value of earnout related to acquisition													$ (1,328)	(1,328)
Total consideration														$ (1,634)

Acquisitions of Businesses - Sc

Acquisitions of Businesses - Schedule of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Oct. 18, 2021	Oct. 01, 2021	Jun. 30, 2021	Apr. 20, 2021	Apr. 01, 2021	Dec. 31, 2020	Dec. 01, 2020	Nov. 05, 2020	Oct. 05, 2020	Dec. 31, 2019
Assets acquired:
Goodwill	$ 672,381						$ 513,234				$ 101,224
Inposia
Assets acquired:
Goodwill						$ 26,500
Inposia | Fair Value
Assets acquired:
Cash and cash equivalents				$ 1,264		1,264
Trade accounts receivable				1,767		1,767
Other current assets				268		268
Operating lease right-of-use assets				928		928
Property and equipment				98		98
Developed technology, customer relationships, and other intangibles				12,684		14,269
Goodwill				27,702		26,520
Other noncurrent assets				35		35
Total assets acquired				44,746		45,149
Liabilities assumed:
Trade payables and accrued expenses				1,340		1,478
Deferred revenue				811		810
Other liabilities, noncurrent				106		106
Operating lease liabilities				928		928
Deferred tax liability				3,919		4,400
Total liabilities assumed				7,104		7,722
Net assets acquired				37,642		37,427
Inposia | Fair Value | Restatement Adjustment
Assets acquired:
Developed technology, customer relationships, and other intangibles						1,585
Goodwill						(1,182)
Total assets acquired						403
Liabilities assumed:
Trade payables and accrued expenses						138
Deferred revenue						(1)
Deferred tax liability						481
Total liabilities assumed						618
Net assets acquired						$ (215)
Davo Technologies LLC
Assets acquired:
Goodwill					$ 51,900
Davo Technologies LLC | Fair Value
Assets acquired:
Cash and cash equivalents	198			198
Funds held from customers	12,464			12,464
Trade accounts receivable	119			119
Other current assets	58			58
Operating lease right-of-use assets	46			46
Developed technology, customer relationships, and other intangibles	4,651			6,427
Goodwill	51,911			48,426
Other noncurrent assets	2			2
Total assets acquired	69,449			67,740
Liabilities assumed:
Accrued expenses	117			117
Deferred revenue	75			75
Operating lease liabilities	46			46
Customer fund obligations	12,464			12,464
Total liabilities assumed	12,702			12,702
Net assets acquired	56,747			$ 55,038
Davo Technologies LLC | Fair Value | Restatement Adjustment
Assets acquired:
Developed technology, customer relationships, and other intangibles	(1,776)
Goodwill	3,485
Total assets acquired	1,709
Liabilities assumed:
Net assets acquired	1,709
Track1099 LLC
Assets acquired:
Goodwill			$ 43,000
Track1099 LLC | Fair Value
Assets acquired:
Prepaid and other current Assets	2
Developed technology, customer relationships, and other intangibles	5,850
Goodwill	42,962
Total assets acquired	48,814
Liabilities assumed:
Current liabilities	1
Deferred revenue	9
Total liabilities assumed	10
Net assets acquired	48,804
CrowdReason LLC and CorrelationAdvisors
Assets acquired:
Goodwill		$ 25,400
CrowdReason LLC and CorrelationAdvisors | Fair Value
Assets acquired:
Current assets	1,426
Developed technology, customer relationships, and other intangibles	10,300
Goodwill	25,415
Total assets acquired	37,141
Liabilities assumed:
Current liabilities	101
Deferred revenue & contract liabilities	676
Total liabilities assumed	777
Net assets acquired	$ 36,364
Transaction Tax Resources, Inc.
Assets acquired:
Goodwill										$ 335,600
Transaction Tax Resources, Inc. | Fair Value
Assets acquired:
Cash and cash equivalents							2,294			2,294
Trade accounts receivable							5,966			5,966
Other current assets							93			93
Operating lease right-of-use assets							1,760			1,760
Property and equipment							848			848
Developed technology, customer relationships, and other intangibles							49,000			41,500
Goodwill							327,039			335,565
Total assets acquired							387,000			388,026
Liabilities assumed:
Trade payables and accrued expenses							731			731
Deferred revenue							8,500			8,500
Operating lease liabilities							1,760			1,760
Deferred tax liability							8,775			6,887
Total liabilities assumed							19,766			17,878
Net assets acquired							367,234			370,148
Transaction Tax Resources, Inc. | Fair Value | Restatement Adjustment
Assets acquired:
Developed technology, customer relationships, and other intangibles										(7,500)
Goodwill										8,526
Total assets acquired										1,026
Liabilities assumed:
Deferred tax liability										(1,888)
Total liabilities assumed										(1,888)
Net assets acquired										$ 2,914
Business Licenses
Assets acquired:
Cash and cash equivalents							120		$ 120
Trade accounts receivable							1,326		1,326
Customer fund assets							1,074		1,074
Other current assets							101		101
Operating lease right-of-use assets							1,644		1,644
Property and equipment							87		87
Developed technology, customer relationships, and other intangibles							19,525		19,525
Goodwill							73,775		72,141
Other noncurrent assets							31		31
Total assets acquired							97,683		96,049
Liabilities assumed:
Accrued expenses							56		56
Operating lease liabilities							1,644		1,644
Customer fund obligations							1,028		1,028
Total liabilities assumed							2,728		2,728
Net assets acquired							94,955		93,321
Business Licenses | Restatement Adjustment
Assets acquired:
Goodwill									(1,634)
Total assets acquired									(1,634)
Liabilities assumed:
Net assets acquired									$ (1,634)
Impendulo
Assets acquired:
Goodwill								$ 10,600
Impendulo | Fair Value
Assets acquired:
Cash and cash equivalents							1,347	1,347
Trade accounts receivable							371	371
Other assets							147	147
Developed technology, customer relationships, and other intangibles							3,617	3,617
Goodwill							10,217	10,642
Total assets acquired							15,699	16,124
Liabilities assumed:
Trade payables and accrued expenses							663	663
Deferred revenue & contract liabilities							694	694
Deferred tax liability							745	745
Total liabilities assumed							2,102	2,102
Net assets acquired							$ 13,597	14,022
Impendulo | Fair Value | Restatement Adjustment
Assets acquired:
Goodwill								425
Total assets acquired								425
Liabilities assumed:
Net assets acquired								$ 425

Acquisitions of Businesses - _2

Acquisitions of Businesses - Summary of the Valuation Methodologies Significant Assumptions, and Estimated Useful Lives of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 18, 2021	Oct. 01, 2021	Apr. 20, 2021	Apr. 01, 2021	Dec. 01, 2020	Nov. 05, 2020	Oct. 05, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Inposia | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value				$ 14,269						$ 12,684
Inposia | Restatement Adjustment | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value				1,585
Davo Technologies LLC | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value								$ 4,651		6,427
Davo Technologies LLC | Restatement Adjustment | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value								(1,776)
Track1099 LLC | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value								5,850
CrowdReason LLC and CorrelationAdvisors | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value								$ 10,300
Transaction Tax Resources, Inc. | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value							$ 41,500		$ 49,000
Transaction Tax Resources, Inc. | Restatement Adjustment | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value							$ (7,500)
Business Licenses
Business Acquisition [Line Items]
Intangible assets Assigned value						$ 19,525			19,525
Impendulo | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value					$ 3,617				$ 3,617
Customer Relationships | Minimum
Business Acquisition [Line Items]
Estimated Useful Life								3 years	3 years
Customer Relationships | Maximum
Business Acquisition [Line Items]
Estimated Useful Life								10 years	10 years
Customer Relationships | Inposia
Business Acquisition [Line Items]
Intangible assets Assigned value				$ 3,288
Valuation Methodology				Multi-period excess earnings-income approach
Discount Rate				18.50%
Estimated Useful Life				8 years
Customer Relationships | Inposia | Previously Reported
Business Acquisition [Line Items]
Intangible assets Assigned value										1,585
Customer Relationships | Inposia | Restatement Adjustment
Business Acquisition [Line Items]
Intangible assets Assigned value				$ 1,703
Customer Relationships | Davo Technologies LLC
Business Acquisition [Line Items]
Intangible assets Assigned value			$ 2,050							4,350
Valuation Methodology			Multi-period excess earnings-income approach and replacement cost method-cost approach
Discount Rate			13.50%
Estimated Useful Life			6 years
Customer Relationships | Davo Technologies LLC | Restatement Adjustment
Business Acquisition [Line Items]
Intangible assets Assigned value			$ (2,300)
Customer Relationships | Track1099 LLC
Business Acquisition [Line Items]
Intangible assets Assigned value		$ 3,200
Valuation Methodology		Multi-period excess earnings-income approach
Discount Rate		28.00%
Estimated Useful Life		5 years
Customer Relationships | CrowdReason LLC and CorrelationAdvisors
Business Acquisition [Line Items]
Intangible assets Assigned value	$ 5,700
Valuation Methodology	Multi-period excess earnings-income approach
Discount Rate	18.00%
Customer Relationships | CrowdReason LLC and CorrelationAdvisors | Minimum
Business Acquisition [Line Items]
Estimated Useful Life	5 years
Customer Relationships | CrowdReason LLC and CorrelationAdvisors | Maximum
Business Acquisition [Line Items]
Estimated Useful Life	8 years
Customer Relationships | Transaction Tax Resources, Inc.
Business Acquisition [Line Items]
Valuation Methodology							Multi-period excess earnings-income approach
Discount Rate							18.00%
Estimated Useful Life							6 years
Customer Relationships | Transaction Tax Resources, Inc. | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value							$ 21,000
Customer Relationships | Transaction Tax Resources, Inc. | Previously Reported | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value									$ 26,000
Customer Relationships | Transaction Tax Resources, Inc. | Restatement Adjustment | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value							$ (5,000)
Customer Relationships | Business Licenses
Business Acquisition [Line Items]
Intangible assets Assigned value						$ 15,000
Valuation Methodology						Multi-period excess earnings-income approach
Discount Rate						19.50%
Estimated Useful Life						6 years
Customer Relationships | Impendulo
Business Acquisition [Line Items]
Valuation Methodology					Multi-period excess earnings-income approach
Discount Rate					20.00%
Estimated Useful Life					6 years
Customer Relationships | Impendulo | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value					$ 2,964
Developed Technology | Minimum
Business Acquisition [Line Items]
Estimated Useful Life								3 years	3 years
Developed Technology | Maximum
Business Acquisition [Line Items]
Estimated Useful Life								8 years	8 years
Developed Technology | Inposia
Business Acquisition [Line Items]
Intangible assets Assigned value				$ 9,572
Valuation Methodology				Relief from royalty-income approach
Discount Rate				18.50%
Estimated Useful Life				6 years
Developed Technology | Inposia | Previously Reported
Business Acquisition [Line Items]
Intangible assets Assigned value										9,572
Developed Technology | Davo Technologies LLC
Business Acquisition [Line Items]
Intangible assets Assigned value			$ 1,950							1,800
Valuation Methodology			Relief from royalty-income approach
Discount Rate			13.50%
Estimated Useful Life			5 years
Developed Technology | Davo Technologies LLC | Restatement Adjustment
Business Acquisition [Line Items]
Intangible assets Assigned value			$ 150
Developed Technology | Track1099 LLC
Business Acquisition [Line Items]
Intangible assets Assigned value		$ 1,250
Valuation Methodology		Relief from royalty-income approach
Discount Rate		28.00%
Estimated Useful Life		2 years
Developed Technology | CrowdReason LLC and CorrelationAdvisors
Business Acquisition [Line Items]
Intangible assets Assigned value	$ 3,900
Valuation Methodology	Relief from royalty-income approach
Discount Rate	18.00%
Estimated Useful Life	5 years
Developed Technology | Transaction Tax Resources, Inc.
Business Acquisition [Line Items]
Valuation Methodology							Relief from royalty-income approach and replacement cost method-cost approach
Developed Technology | Transaction Tax Resources, Inc. | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value							$ 9,600
Developed Technology | Transaction Tax Resources, Inc. | Minimum
Business Acquisition [Line Items]
Discount Rate							17.00%
Estimated Useful Life							3 years
Developed Technology | Transaction Tax Resources, Inc. | Maximum
Business Acquisition [Line Items]
Discount Rate							18.00%
Estimated Useful Life							6 years
Developed Technology | Transaction Tax Resources, Inc. | Previously Reported | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value									$ 9,600
Developed Technology | Business Licenses
Business Acquisition [Line Items]
Intangible assets Assigned value						$ 3,625
Valuation Methodology						Relief from royalty-income approach and replacement cost method-cost approach
Discount Rate						19.50%
Developed Technology | Business Licenses | Minimum
Business Acquisition [Line Items]
Estimated Useful Life						1 year
Developed Technology | Business Licenses | Maximum
Business Acquisition [Line Items]
Estimated Useful Life						5 years
Developed Technology | Impendulo
Business Acquisition [Line Items]
Valuation Methodology					Relief from royalty-income approach
Discount Rate					20.00%
Estimated Useful Life					6 years
Developed Technology | Impendulo | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value					$ 616
Noncompete Agreements | Minimum
Business Acquisition [Line Items]
Estimated Useful Life								3 years	3 years
Noncompete Agreements | Maximum
Business Acquisition [Line Items]
Estimated Useful Life								5 years	5 years
Noncompete Agreements | Inposia
Business Acquisition [Line Items]
Intangible assets Assigned value				$ 1,174
Valuation Methodology				With-and-without valuation-income approach
Discount Rate				21.00%
Estimated Useful Life				3 years
Noncompete Agreements | Inposia | Previously Reported
Business Acquisition [Line Items]
Intangible assets Assigned value										1,292
Noncompete Agreements | Inposia | Restatement Adjustment
Business Acquisition [Line Items]
Intangible assets Assigned value				$ (118)
Noncompete Agreements | Davo Technologies LLC
Business Acquisition [Line Items]
Intangible assets Assigned value			$ 564							191
Valuation Methodology			With-and-without valuation-income approach
Discount Rate			15.50%
Estimated Useful Life			5 years
Noncompete Agreements | Davo Technologies LLC | Restatement Adjustment
Business Acquisition [Line Items]
Intangible assets Assigned value			$ 373
Noncompete Agreements | Track1099 LLC
Business Acquisition [Line Items]
Intangible assets Assigned value		$ 1,300
Valuation Methodology		With-and-without valuation-income approach
Discount Rate		30.00%
Estimated Useful Life		5 years
Noncompete Agreements | CrowdReason LLC and CorrelationAdvisors
Business Acquisition [Line Items]
Intangible assets Assigned value	$ 100
Valuation Methodology	With-and-without valuation-income approach
Discount Rate	20.00%
Estimated Useful Life	5 years
Noncompete Agreements | Transaction Tax Resources, Inc.
Business Acquisition [Line Items]
Valuation Methodology							With-and-without valuation-income approach
Discount Rate							19.00%
Estimated Useful Life							5 years
Noncompete Agreements | Transaction Tax Resources, Inc. | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value							$ 1,800
Noncompete Agreements | Transaction Tax Resources, Inc. | Previously Reported | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value									$ 1,800
Noncompete Agreements | Business Licenses
Business Acquisition [Line Items]
Intangible assets Assigned value						$ 500
Valuation Methodology						With-and-without valuation-income approach
Discount Rate						19.50%
Estimated Useful Life						5 years
Tradename and Trademarks | Minimum
Business Acquisition [Line Items]
Estimated Useful Life								1 year	1 year
Tradename and Trademarks | Maximum
Business Acquisition [Line Items]
Estimated Useful Life								4 years	4 years
Tradename and Trademarks | Inposia
Business Acquisition [Line Items]
Intangible assets Assigned value				$ 235
Valuation Methodology				Relief from royalty-income approach
Discount Rate				18.50%
Estimated Useful Life				3 years
Tradename and Trademarks | Inposia | Previously Reported
Business Acquisition [Line Items]
Intangible assets Assigned value										235
Tradename and Trademarks | Davo Technologies LLC
Business Acquisition [Line Items]
Intangible assets Assigned value			$ 87							$ 86
Valuation Methodology			Relief from royalty-income approach
Discount Rate			13.50%
Estimated Useful Life			1 year
Tradename and Trademarks | Davo Technologies LLC | Restatement Adjustment
Business Acquisition [Line Items]
Intangible assets Assigned value			$ 1
Tradename and Trademarks | Track1099 LLC
Business Acquisition [Line Items]
Intangible assets Assigned value		$ 100
Valuation Methodology		Relief from royalty-income approach
Discount Rate		28.00%
Estimated Useful Life		2 years
Tradename and Trademarks | CrowdReason LLC and CorrelationAdvisors
Business Acquisition [Line Items]
Intangible assets Assigned value	$ 150
Valuation Methodology	Relief from royalty-income approach
Discount Rate	18.00%
Estimated Useful Life	2 years
Tradename and Trademarks | Transaction Tax Resources, Inc.
Business Acquisition [Line Items]
Valuation Methodology							Relief from royalty-income approach
Discount Rate							17.00%
Estimated Useful Life							2 years
Tradename and Trademarks | Transaction Tax Resources, Inc. | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value							$ 5,800
Tradename and Trademarks | Transaction Tax Resources, Inc. | Previously Reported | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value									$ 5,800
Tradename and Trademarks | Business Licenses
Business Acquisition [Line Items]
Intangible assets Assigned value						$ 400
Valuation Methodology						Relief from royalty-income approach
Discount Rate						19.50%
Estimated Useful Life						1 year
Tradename and Trademarks | Impendulo
Business Acquisition [Line Items]
Valuation Methodology					Relief from royalty-income approach
Discount Rate					20.00%
Estimated Useful Life					1 year
Tradename and Trademarks | Impendulo | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value					$ 37
Backlog
Business Acquisition [Line Items]
Estimated Useful Life								3 years	3 years
Backlog | CrowdReason LLC and CorrelationAdvisors
Business Acquisition [Line Items]
Intangible assets Assigned value	$ 450
Valuation Methodology	Multi-period excess earnings-income approach
Discount Rate	15.00%
Estimated Useful Life	1 year
Contract Backlog | Transaction Tax Resources, Inc.
Business Acquisition [Line Items]
Valuation Methodology							Multi-period excess earnings-income approach
Discount Rate							17.00%
Estimated Useful Life							3 years
Contract Backlog | Transaction Tax Resources, Inc. | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value							$ 3,300
Contract Backlog | Transaction Tax Resources, Inc. | Previously Reported | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value									$ 5,800
Contract Backlog | Transaction Tax Resources, Inc. | Restatement Adjustment | Fair Value
Business Acquisition [Line Items]
Intangible assets Assigned value							$ (2,500)

Acquisitions of Businesses - _3

Acquisitions of Businesses - Schedule of Pro Forma Financial Information (Unaudited) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition Pro Forma Information [Abstract]
Total revenues	$ 711,047	$ 552,886
Pre-tax loss	$ (124,428)	$ (64,320)

Revenues - Summary of Total Rev

Revenues - Summary of Total Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Revenues	$ 698,977	$ 500,569	$ 382,421
U.S.
Disaggregation Of Revenue [Line Items]
Revenues	643,133	469,301	359,011
Non-U.S.
Disaggregation Of Revenue [Line Items]
Revenues	55,844	31,268	23,410
Subscription and Returns, Tax Calculations | U.S.
Disaggregation Of Revenue [Line Items]
Revenues	349,430	257,680	203,584
Subscription and Returns, Tax Returns and Compliance Management | U.S.
Disaggregation Of Revenue [Line Items]
Revenues	233,420	178,318	127,815
Subscription and Returns, Interest Income on Funds Held from customers | U.S.
Disaggregation Of Revenue [Line Items]
Revenues	769	829	3,213
Subscription and Returns
Disaggregation Of Revenue [Line Items]
Revenues	633,091	465,825	355,181
Subscription and Returns | U.S.
Disaggregation Of Revenue [Line Items]
Revenues	583,619	436,827	334,612
Professional Services
Disaggregation Of Revenue [Line Items]
Revenues	65,886	34,744	27,240
Professional Services | U.S.
Disaggregation Of Revenue [Line Items]
Revenues	$ 59,514	$ 32,474	$ 24,399

Revenues - Summary of Activity

Revenues - Summary of Activity Impacting Contract Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Contract Liabilities [Rollforward]
Balance beginning of period	$ 10,134	$ 5,197
Contract liabilities transferred to deferred revenue	(21,255)	(11,151)
Addition to contract liabilities	18,039	16,088
Balance end of period	$ 6,918	$ 10,134

Revenues - Summary of Activit_2

Revenues - Summary of Activity Impacting Deferred Revenue (Details) - Deferred Revenue - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Deferred Revenue Rollforward
Balance beginning of period	$ 209,690	$ 161,241
Revenue recognized	(698,977)	(500,569)
Additional amounts deferred	772,242	549,018
Balance end of period	$ 282,955	$ 209,690

Revenues - Additional Informati

Revenues - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Deferred commissions amortization expected period	6 years
Deferred contract costs, expected to be amortized within next 12 Months	$ 16,364,000	$ 12,245,000
Impairments of deferred contract costs	0	0
Assets recognized related to costs to fulfill contracts	0	$ 0
Remaining performance obligations	369,200,000
Non-cancellable Amount Not Yet Invoiced
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Remaining performance obligations	86,200,000
Current Liabilities
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Deferred revenue expected to be recognized within next 12 months	280,800,000
Prepaid Expenses and Other Current Assets
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Deferred contract costs, expected to be amortized within next 12 Months	$ 16,400,000

Revenues - Summary of Activit_3

Revenues - Summary of Activity Impacting Deferred Commissions (Details) - Deferred Commissions - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Capitalized Contract Cost [Line Items]
Balance beginning of period	$ 50,870	$ 38,416
Additional commissions deferred	32,721	23,935
Amortization of deferred commissions	(15,072)	(11,481)
Balance end of period	$ 68,519	$ 50,870

Revenues - Additional Informa_2

Revenues - Additional Information (Details 1) $ in Millions	Dec. 31, 2021USD ($)
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Remaining performance obligations	$ 369.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Remaining performance obligations	$ 348.4
Revenue expected to be recognized with remaining amount	12 months
Non-cancellable Amount Not Yet Invoiced
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Remaining performance obligations	$ 86.2
Non-cancellable Amount Not Yet Invoiced | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Remaining performance obligations	$ 67.6
Revenue expected to be recognized with remaining amount	12 months

Intangible Assets - Schedule of

Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Gross	$ 166,130	$ 131,987
Accumulated Amortization	(69,312)	(45,474)
Net	$ 96,818	$ 86,513
Backlog
Finite Lived Intangible Assets [Line Items]
Average Useful Life (Years)	3 years	3 years
Gross	$ 4,500	$ 5,800
Accumulated Amortization	(1,816)	(937)
Net	2,684	4,863
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross	75,188	64,302
Accumulated Amortization	(23,795)	(14,890)
Net	$ 51,393	$ 49,412
Customer Relationships | Minimum
Finite Lived Intangible Assets [Line Items]
Average Useful Life (Years)	3 years	3 years
Customer Relationships | Maximum
Finite Lived Intangible Assets [Line Items]
Average Useful Life (Years)	10 years	10 years
Developed Technology
Finite Lived Intangible Assets [Line Items]
Gross	$ 72,723	$ 52,144
Accumulated Amortization	(37,333)	(27,646)
Net	$ 35,390	$ 24,498
Developed Technology | Minimum
Finite Lived Intangible Assets [Line Items]
Average Useful Life (Years)	3 years	3 years
Developed Technology | Maximum
Finite Lived Intangible Assets [Line Items]
Average Useful Life (Years)	8 years	8 years
Noncompete Agreements
Finite Lived Intangible Assets [Line Items]
Gross	$ 6,452	$ 3,062
Accumulated Amortization	(1,725)	(766)
Net	$ 4,727	$ 2,296
Noncompete Agreements | Minimum
Finite Lived Intangible Assets [Line Items]
Average Useful Life (Years)	3 years	3 years
Noncompete Agreements | Maximum
Finite Lived Intangible Assets [Line Items]
Average Useful Life (Years)	5 years	5 years
Tradename and Trademarks
Finite Lived Intangible Assets [Line Items]
Gross	$ 7,267	$ 6,679
Accumulated Amortization	(4,643)	(1,235)
Net	$ 2,624	$ 5,444
Tradename and Trademarks | Minimum
Finite Lived Intangible Assets [Line Items]
Average Useful Life (Years)	1 year	1 year
Tradename and Trademarks | Maximum
Finite Lived Intangible Assets [Line Items]
Average Useful Life (Years)	4 years	4 years

Intangible Assets - Schedule _2

Intangible Assets - Schedule of Intangible Assets (Parenthetical) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
IPR&D
Indefinite Lived Intangible Assets By Major Class [Line Items]
Finite-lived intangible assets, net	$ 0.4	$ 0.6

Intangible Assets - Additional

Intangible Assets - Additional Information (Details) - USD ($)	Oct. 31, 2018	May 31, 2018	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense			$ 24,100,000	$ 10,700,000	$ 7,100,000
Earnout liability			33,151,000	749,000
Goodwill impairment charge	$ 0		0	0	0
Goodwill			672,381,000	513,234,000	101,224,000
Accumulated goodwill impairment			$ 17,600,000	17,600,000
Brazilian Reporting Unit
Finite Lived Intangible Assets [Line Items]
Weighted average cost of capital			25.00%
Goodwill			$ 0	$ 0	$ 0
Accrued Expenses
Finite Lived Intangible Assets [Line Items]
Earnout liability			600,000
Tradestream Technologies Inc. and Wise 24 Inc
Finite Lived Intangible Assets [Line Items]
Future revenue recognized period		6 years
Earnout provision			$ 2,200,000
Tradestream Technologies Inc. and Wise 24 Inc | Maximum
Finite Lived Intangible Assets [Line Items]
Total consideration		$ 30,000,000

Intangible Assets - Schedule _3

Intangible Assets - Schedule of Future Amortization Expense Related to Finite-lived Intangible Assets (Details) $ in Thousands	Dec. 31, 2021USD ($)
Finite-Lived Intangible Assets, Net [Abstract]
2022	$ 27,230
2023	22,026
2024	17,285
2025	14,319
2026	10,959
Thereafter	4,599
Finite-lived intangible assets excluding in process research and development cost	$ 96,418

Intangible Assets - Schedule _4

Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Balance	$ 513,234	$ 101,224
Cumulative translation adjustments	(2,046)	979
Balance	672,381	513,234
2020 Acquisition
Goodwill [Line Items]
Measurement period adjustment, goodwill acquired during period	7,317
Additions		$ 411,031
2021 Acquisition
Goodwill [Line Items]
Additions	$ 153,876

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lessee Lease Description [Line Items]
Lessee, operating lease, description	The Company has non-cancelable operating leases primarily for office facilities in the United States, Brazil, Europe, and India that expire through 2029. The remaining operating leases are primarily comprised of leases of vehicles, office equipment, and servers.
Lessee, operating lease, option to extend	some of which include options to extend for up to 10 years
Lessee, operating lease, existence of option to extend	true
Lessee, operating lease, option to terminate	some of which include options to terminate within 2 years after the commencement date.
Lessee,operating lease, existence of option to terminate	true
Asset impairments		$ 794
Lessee, operating lease, lease not yet commenced, description	As of December 31, 2021, the Company had two operating leases for additional office space that had not yet commenced.
Lessee, operating lease, lease not yet commenced future non cancelable lease payments	$ 6,300
Maximum
Lessee Lease Description [Line Items]
Lessee, operating lease, remaining lease terms	7 years 9 months 18 days
Lessee, operating lease, options to extend lease term	10 years
Lessee, options to terminate lease term	2 years
Lessee, operating lease, lease not yet commenced, term	5 years 10 months 24 days
Minimum
Lessee Lease Description [Line Items]
Lessee, operating lease, remaining lease terms	2 months 12 days
Lessee, operating lease, lease not yet commenced, term	2 years 6 months

Leases - Summary of Future Leas

Leases - Summary of Future Lease Payments for Long-Term Operating Leases (Details) $ in Thousands	Dec. 31, 2021USD ($)
Operating Lease Commitments
2022	$ 14,824
2023	14,121
2024	12,767
2025	10,117
2026	6,789
Thereafter	8,288
Total	66,906
Less: Imputed interest	(9,839)
Total operating lease liabilities	$ 57,067

Leases - Summary of Future Le_2

Leases - Summary of Future Lease Payments for Long-Term Operating Leases (Parenthetical) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Leases [Abstract]
Future sublease under non-cancelable subleases	$ 0.8

Leases - Summary of Supplementa

Leases - Summary of Supplemental Balance Sheet Information (Details)	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Weighted average remaining lease term (in years)	5 years	5 years 9 months 18 days
Weighted average discount rate	6.50%	6.60%

Leases - Summary of the Compone

Leases - Summary of the Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lease Cost [Abstract]
Operating lease costs	$ 13,501	$ 12,766	$ 9,329
Variable lease costs	3,617	2,948	2,562
Short-term lease costs	846	1,722	1,065
Sublease income	(1,541)	(1,534)	(1,448)
Total lease cost, net	$ 16,423	$ 15,902	$ 11,508

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - Network Infrastructure, Hosting Services and Software Licenses $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)
Loss Contingencies [Line Items]
Purchase obligation due, 2022	$ 45.6
Purchase obligation due, 2023	32.2
Purchase obligation due, 2024	26
Purchase obligation due, 2025	$ 10.6
Maximum
Loss Contingencies [Line Items]
Purchase commitments period	4 years

Debt - Additional Information (

Debt - Additional Information (Details) - 2026 Notes - USD ($)	1 Months Ended	12 Months Ended
	Aug. 31, 2021	Dec. 31, 2021
Debt Instrument [Line Items]
Principal amount	$ 977,500,000	$ 977,500,000
Description of interest rate		The 2026 Notes are unsecured obligations and bear interest at a fixed rate of 0.25% per annum, payable semi-annually in arrears on February 1 and August 1 of each year, commencing on February 1, 2022.
Fixed interest rate	0.25%
Debt instrument, description of maturity date		The 2026 Notes will mature on August 1, 2026, unless earlier converted, redeemed, or repurchased.
Debt instrument, maturity date	Aug. 1, 2026
Debt issuance costs	$ 17,600,000
Proceeds from offering, net of debt issuance costs	959,900,000
Net proceeds from sale of convertible senior notes used to purchase the capped calls	$ 75,300,000
Redemption description		The Company may not redeem the 2026 Notes prior to August 6, 2024. The Company may redeem all or any portion of the 2026 Notes, at the Company’s option, on or after August 6, 2024, through the 41st scheduled trading day immediately prior to the maturity date, if the common stock price is at least 130% of the conversion price then in effect for at least 20 of any 30 consecutive trading day period. The Company may redeem all or part of the 2026 Notes at a redemption price equal to the principal amount plus accrued and unpaid interest to, but excluding, the redemption date, with not less than 50 nor more than 60 scheduled trading days’ notice to holders.
Percentage of common stock price to conversion price		130.00%
Debt conversion, description		The 2026 Notes are convertible at an initial conversion rate of 4.1940 shares of common stock per $1,000 principal amount of 2026 Notes, which is equivalent to an initial conversion price of approximately $238.44 per share of common stock. The conversion rate is subject to customary adjustments for certain events as described in the indenture governing the 2026 Notes.
Debt conversion, shares of common stock		4.1940
Principal amount		$ 1,000
Initial conversion price		$ 238.44
Percentage of trading price per $1000 notes to product of closing sale price of common stock and current conversion rate		98.00%
Effective interest rate		0.62%
Capped Call Transactions
Debt Instrument [Line Items]
Initial strike price		$ 238.44
Initial cap price		$ 323.30
Aggregate amount for capped calls		$ 75,300,000
Shares of common stock covered		4,100,000
Minimum
Debt Instrument [Line Items]
Consecutive trading day period		20 days
Scheduled trading days		50 days
Maximum
Debt Instrument [Line Items]
Consecutive trading day period		30 days
Scheduled trading days		60 days

Debt - Summary of Net Carrying

Debt - Summary of Net Carrying Amount of Notes (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Aug. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Net carrying amount	$ 961,259		$ 0
2026 Notes
Debt Instrument [Line Items]
Principal	977,500	$ 977,500
Unamortized debt issuance costs	(16,241)
Net carrying amount	$ 961,259

Debt - Summary of Interest Expe

Debt - Summary of Interest Expense Recognized (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)
Debt Instrument [Line Items]
Amortization of debt issuance costs	$ 1,367
2026 Notes
Debt Instrument [Line Items]
Contractual interest expense	944
Amortization of debt issuance costs	1,367
Total interest expense related to 2026 Notes	$ 2,311

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Details) $ / shares in Units, $ in Thousands	1 Months Ended			12 Months Ended
	Aug. 31, 2020USD ($)$ / sharesshares	Jun. 30, 2019USD ($)$ / sharesshares	Jun. 30, 2018USD ($)$ / sharesshares	Dec. 31, 2021Class$ / sharesshares	Dec. 31, 2020USD ($)$ / sharesshares	Dec. 31, 2019USD ($)shares
Class Of Stock [Line Items]
Number of classes of stock | Class				2
Capital stock, authorized shares				620,000,000
Common stock, shares authorized				600,000,000	600,000,000
Common stock, par value | $ / shares				$ 0.0001	$ 0.0001
Preferred stock, shares authorized				20,000,000	20,000,000
Preferred stock, par value | $ / shares				$ 0.0001	$ 0.0001
Offering expenses paid and payable | $					$ 701	$ 1,198
Proceeds from common stock offering, net of underwriting discounts | $					$ 556,312	$ 274,705
Common Stock
Class Of Stock [Line Items]
Public offering					4,527,558	4,133,984
Proceeds from initial public offering, net of underwriting discounts | $			$ 192,500
Common Stock | IPO
Class Of Stock [Line Items]
Public offering			8,625,000
Common stock price per share | $ / shares			$ 24
Offering expenses paid and payable | $			$ 3,400
Common Stock | Underwriters
Class Of Stock [Line Items]
Public offering	590,551	539,215	1,125,000
Common Stock | Public Offering
Class Of Stock [Line Items]
Public offering	4,527,558	4,133,984
Common stock price per share | $ / shares	$ 127	$ 69.40
Offering expenses paid and payable | $	$ 700	$ 1,200
Proceeds from common stock offering, net of underwriting discounts | $	$ 556,300	$ 274,700

Equity Incentive Plans - Additi

Equity Incentive Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares subject to outstanding awards	2,278,789	3,537,014
Stock-based compensation cost capitalized	$ 1.6	$ 0.4	$ 0.1
Total intrinsic value of options exercised	$ 173.2	$ 243.8	$ 318.5
Options granted	0
Weighted average grant date fair value of options granted		$ 34	$ 19.80
Number of shares, vested	1,051,226
Number of options unvested	525,722
Contractual life	10 years
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term		6 years	6 years
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term		5 years	5 years
Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options, average vesting term	4 years
Expected term	6 years
Non Employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options, average vesting term	1 year
Expected term	5 years
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation expense related to stock options	$ 11.1
Unrecognized compensation expense expected to be recognized over weighted average period	1 year 7 months 6 days
Stock Options | Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options vesting period	4 years
Stock Options | Non Employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options vesting period	1 year
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense expected to be recognized over weighted average period	2 years 9 months 18 days
Total unrecognized compensation expense expected to be recognized	$ 238.8
Restricted Stock Units (RSUs) | Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options vesting period	4 years
Restricted Stock Units (RSUs) | Non Employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options vesting period	1 year
Performance Share Units (PSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense expected to be recognized over weighted average period	1 year 10 months 24 days
Stock options vesting period	3 years
Total unrecognized compensation expense expected to be recognized	$ 19.9
Vesting term, description	Each PSU grant will vest in annual tranches over a three-year service period. Total units earned for grants made in 2021 may vary between 0% and 250% of the units granted based on the attainment of company-specific performance targets during the related three-year period and continued service.
Vesting percentage	250.00%
Performance Share Units (PSUs) | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	0.00%
Performance Share Units (PSUs) | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service period	3 years
2018 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares of common stock reserved for issuance	5,315,780
Automatically increase percentage of aggregate number of shares of common stock outstanding	5.00%
Shares subject to outstanding awards	4,077,218
Shares available for future issuance	12,042,976
2006 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares subject to outstanding awards	1,178,424
2018 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares of common stock reserved for issuance	996,709
Total unrecognized compensation expense related to stock options	$ 0.4
Contractual life	10 years
Expected term	6 months	6 months	6 months
Description of offering period for ESPP	Offering periods begin on August 1 and February 1 each year (or such other date determined by our Board of Directors or our Compensation and Leadership Development Committee).
Minimum weekly hours required to work for getting eligible to participate in ESPP	20 hours
Description of purchase price for shares of common stock purchased under ESPP	The purchase price for shares of common stock purchased under the ESPP is 85% of the lesser of the fair market value of the Company’s common stock on (i) the first day of the applicable offering period or (ii) the last day of the purchase period in the applicable offering period.
Percentage of purchase price for shares of common stock under fair value market	85.00%
Employee stock purchase plan number of shares initially authorized	10,102,525
2018 Employee Stock Purchase Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of payroll deduction on eligible compensation	15.00%
2018 Employee Stock Purchase Plan | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Automatically increase percentage of aggregate number of shares of common stock outstanding	1.00%
Percentage of payroll deduction on eligible compensation	1.00%
Increase of common stock capital shares reserved for future issuance in each of calendar year	1,000,000
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares of common stock reserved for issuance	2,509,441

Equity Incentive Plans - Summar

Equity Incentive Plans - Summary of Stock-Based Compensation Expense Related to Equity Incentive Rewards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation cost	$ 89,688	$ 48,570	$ 34,400
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation cost	11,966	15,402	16,489
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation cost	57,116	29,181	14,585
Performance Share Units (PSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation cost	16,011	0	0
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation cost	$ 4,595	$ 3,987	$ 3,326

Equity Incentive Plans - Summ_2

Equity Incentive Plans - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Shares
Options outstanding beginning balance	3,537,014
Options granted	0
Options exercised	(1,223,395)
Options cancelled or expired	(34,830)
Options outstanding ending balance	2,278,789	3,537,014
Options exercisable	1,753,067
Weighted Average Exercise Price
Options outstanding beginning balance	$ 28.17
Options exercised	17.80
Options cancelled or expired	42.24
Options outstanding ending balance	33.52	$ 28.17
Options exercisable	$ 27.80
Weighted Average Remaining Contractual Life (Years)
Options outstanding	6 years 3 months 18 days	6 years 10 months 20 days
Options exercisable	5 years 11 months 19 days
Aggregate Intrinsic Value
Options outstanding	$ 217,824	$ 483,577
Options exercisable	$ 177,609

Equity Incentive Plans - Summ_3

Equity Incentive Plans - Summary of Options Outstanding and Vested (Details)	12 Months Ended
	Dec. 31, 2021$ / sharesshares
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Option Outstanding, Number Outstanding	2,278,789
Options Vested and Exercisable, Number Vested and Exercisable	1,753,067
Options Vested and Exercisable, Weighted Average Life (in Years)	5 years 11 months 19 days
$1.90 to $6.40
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Prices, Low | $ / shares	$ 1.90
Exercise Prices, High | $ / shares	$ 6.40
Option Outstanding, Number Outstanding	18,612
Options Outstanding, Weighted Average Life (in Years)	1 year 1 month 6 days
Options Vested and Exercisable, Number Vested and Exercisable	18,612
Options Vested and Exercisable, Weighted Average Life (in Years)	1 year 1 month 6 days
$8.04 to $11.72
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Prices, Low | $ / shares	$ 8.04
Exercise Prices, High | $ / shares	$ 11.72
Option Outstanding, Number Outstanding	72,717
Options Outstanding, Weighted Average Life (in Years)	2 years 3 months 18 days
Options Vested and Exercisable, Number Vested and Exercisable	72,717
Options Vested and Exercisable, Weighted Average Life (in Years)	2 years 3 months 18 days
$12.20 to $15.06
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Prices, Low | $ / shares	$ 12.20
Exercise Prices, High | $ / shares	$ 15.06
Option Outstanding, Number Outstanding	380,304
Options Outstanding, Weighted Average Life (in Years)	4 years 8 months 12 days
Options Vested and Exercisable, Number Vested and Exercisable	380,304
Options Vested and Exercisable, Weighted Average Life (in Years)	4 years 8 months 12 days
$16.06 to $24.00
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Prices, Low | $ / shares	$ 16.06
Exercise Prices, High | $ / shares	$ 24
Option Outstanding, Number Outstanding	706,791
Options Outstanding, Weighted Average Life (in Years)	6 years 1 month 6 days
Options Vested and Exercisable, Number Vested and Exercisable	639,948
Options Vested and Exercisable, Weighted Average Life (in Years)	6 years 1 month 6 days
$31.99 to $42.21
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Prices, Low | $ / shares	$ 31.99
Exercise Prices, High | $ / shares	$ 42.21
Option Outstanding, Number Outstanding	655,237
Options Outstanding, Weighted Average Life (in Years)	7 years
Options Vested and Exercisable, Number Vested and Exercisable	441,953
Options Vested and Exercisable, Weighted Average Life (in Years)	7 years
$55.10 to $99.65
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Prices, Low | $ / shares	$ 55.10
Exercise Prices, High | $ / shares	$ 99.65
Option Outstanding, Number Outstanding	410,736
Options Outstanding, Weighted Average Life (in Years)	7 years 9 months 18 days
Options Vested and Exercisable, Number Vested and Exercisable	185,749
Options Vested and Exercisable, Weighted Average Life (in Years)	7 years 9 months 18 days
$124.35 to $151.76
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Prices, Low | $ / shares	$ 124.35
Exercise Prices, High | $ / shares	$ 151.76
Option Outstanding, Number Outstanding	34,392
Options Outstanding, Weighted Average Life (in Years)	7 years 9 months 18 days
Options Vested and Exercisable, Number Vested and Exercisable	13,784
Options Vested and Exercisable, Weighted Average Life (in Years)	6 years 6 months

Equity Incentive Plans - Summ_4

Equity Incentive Plans - Summary of Fair Value Estimated Using Black-Scholes Option Pricing Model Assumptions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Volatility			40.00%
Volatility, minimum		43.00%
Volatility, maximum		44.00%
Expected dividend yield	0.00%	0.00%	0.00%
Risk-free interest rate, minimum		0.33%	1.68%
Risk-free interest rate, maximum		1.25%	2.65%
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair market value of common stock		$ 66.26	$ 39.76
Expected term		5 years	5 years
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair market value of common stock		$ 151.76	$ 79.25
Expected term		6 years	6 years

Equity Incentive Plans - Summ_5

Equity Incentive Plans - Summary of RSU Activity (Details) - Restricted Stock Units (RSUs)	12 Months Ended
	Dec. 31, 2021$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs/PSUs outstanding as of January 1, 2021, Shares | shares	2,359,063
RSUs/PSUs granted, Shares | shares	1,282,177
RSUs/PSUs vested, Shares | shares	(524,246)
RSUs/PSUs cancelled, Shares | shares	(255,031)
RSUs/PSUs outstanding as of December 31, 2021, Shares | shares	2,861,963
RSUs/PSUs outstanding as of January 1, 2021, Weighted average grant date fair value per share | $ / shares	$ 70.17
RSUs/PSUs granted, Weighted average grant date fair value per share | $ / shares	138.79
RSUs/PSUs vested, Weighted average grant date fair value per share | $ / shares	68.36
RSUs/PSUs cancelled, Weighted average grant date fair value per share | $ / shares	90.66
RSUs/PSUs outstanding as of December 31, 2021, Weighted average grant date fair value per share | $ / shares	$ 99.41

Equity Incentive Plans - Summ_6

Equity Incentive Plans - Summary of PSU Activity (Details) - Performance Share Units (PSUs)	12 Months Ended
	Dec. 31, 2021$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs/PSUs granted, Shares | shares	120,632
RSUs/PSUs cancelled, Shares | shares	(5,742)
RSUs/PSUs outstanding as of December 31, 2021, Shares | shares	114,890
RSUs/PSUs granted, Weighted average grant date fair value per share | $ / shares	$ 147.39
RSUs/PSUs cancelled, Weighted average grant date fair value per share | $ / shares	150
RSUs/PSUs outstanding as of December 31, 2021, Weighted average grant date fair value per share | $ / shares	$ 147.26

Equity Incentive Plans - Summ_7

Equity Incentive Plans - Summary of Fair Value of ESPP Purchase Rights Was Estimated Using Black-Scholes Option-pricing Model Assumptions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Volatility			40.00%
Expected dividend yield	0.00%	0.00%	0.00%
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair market value of common stock		$ 151.76	$ 79.25
Expected term		6 years	6 years
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair market value of common stock		$ 66.26	$ 39.76
Expected term		5 years	5 years
2018 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Volatility			40.00%
Expected term	6 months	6 months	6 months
Expected dividend yield	0.00%	0.00%	0.00%
2018 Employee Stock Purchase Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair market value of common stock	$ 166.84	$ 138.83	$ 82.12
Volatility	34.00%	49.00%
Risk-free interest rate	0.08%	1.54%	2.59%
2018 Employee Stock Purchase Plan | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair market value of common stock	$ 152.35	$ 87.23	$ 40.60
Volatility	31.00%	32.00%
Risk-free interest rate	0.06%	0.11%	2.04%

Income Taxes - Schedule of Dome

Income Taxes - Schedule of Domestic and Foreign Components of Loss Before Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Domestic	$ (93,556)	$ (34,483)	$ (30,272)
Foreign	(28,369)	(23,009)	(18,987)
Loss before income taxes	$ (121,925)	$ (57,492)	$ (49,259)

Income Taxes - Schedule of Majo

Income Taxes - Schedule of Major Components of Income Tax (Provision) Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 0	$ 0	$ 0
State	0	0	0
Foreign	(2,180)	(1,110)	(1,178)
Total current income tax provision	(2,180)	(1,110)	(1,178)
Deferred:
Federal	(1,746)	6,790	(90)
State	(526)	1,657	(53)
Foreign	1,144	972	366
Total deferred income tax (provision) benefit	(1,128)	9,419	223
Total	$ (3,308)	$ 8,309	$ (955)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Valuation allowance	$ 335,952	$ 246,598
U.S. statutory rate	21.00%	21.00%	21.00%
Unrecognized tax benefits	$ 9,133	$ 7,029	$ 5,210	$ 4,118
Unrecognized tax benefits impact effective tax rate	$ 200
Federal Tax | After 2017
Income Taxes [Line Items]
Percentage of net operating loss carryforwards	80.00%
TTR and Impendulo Acquisitions
Income Taxes [Line Items]
Valuation allowance		$ 9,500
Increase in valuation allowance	$ 1,900

Income Taxes - Schedule of Ma_2

Income Taxes - Schedule of Major Differences Between U.S Statutory Rate and Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Tax at statutory rate	$ 25,601	$ 12,073	$ 10,345
State taxes	4,462	1,349	1,941
Research and development credits	3,993	2,960	2,285
Stock-based compensation	47,602	56,766	67,718
Impact of foreign operations	2,740	342	(1,373)
Change in valuation allowance	(85,842)	(65,485)	(80,284)
Other	(1,864)	304	(1,587)
Total	$ (3,308)	$ 8,309	$ (955)

Income Taxes - Schedule of Sign

Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carryforward	$ 315,482	$ 240,048
Stock-based compensation	18,400	10,484
Deferred revenue	682	0
Research and development credit, net of uncertain tax position reserve	13,543	9,284
Operating lease liabilities	14,498	16,237
Other	14,191	11,016
Total deferred tax assets	376,796	287,069
Deferred tax liabilities:
Deferred commissions	(17,208)	(12,288)
Operating lease right-of-use assets	(11,331)	(12,243)
Property and equipment	(6,625)	(4,458)
Definite-lived intangibles	(5,073)	(8,278)
Indefinite-lived intangibles	(4,433)	(3,127)
Deferred revenue	0	(322)
Other	(86)	(193)
Total deferred tax liabilities	(44,756)	(40,909)
Net deferred tax assets before valuation allowance	332,040	246,160
Valuation allowance	(335,952)	(246,598)
Net deferred tax liability	$ (3,912)	$ (438)

Income Taxes - Schedule of Net

Income Taxes - Schedule of Net Operating Loss and Research Credit Carryforwards (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)
Federal Tax
Income Taxes [Line Items]
Net operating loss carryforwards	$ 1,145,574
Research & development credits	$ 21,890
Research & development credits carryforwards expiration year	2030
Federal Tax | 2017 and Prior
Income Taxes [Line Items]
Net operating loss carryforwards	$ 288,052
Operating loss carryforwards expiration year	2025
Federal Tax | After 2017
Income Taxes [Line Items]
Net operating loss carryforwards	$ 857,522
Operating loss carryforwards expiration year	Non-expiring
Foreign Tax
Income Taxes [Line Items]
Net operating loss carryforwards	$ 110,463
Research & development credits	$ 378
Operating loss carryforwards expiration year	Non-expiring
Research & development credits carryforwards expiration year	2039
State Tax
Income Taxes [Line Items]
Net operating loss carryforwards	$ 790,264
Research & development credits	$ 1,191
Operating loss carryforwards expiration year	2022
Research & development credits carryforwards expiration year	2040

Income Taxes - Summary of Recon

Income Taxes - Summary of Reconciliation of Beginning and Ending Balances for Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1	$ 7,029	$ 5,210	$ 4,118
Additions for tax positions related to the current year	2,081	1,799	1,435
Additions for tax positions related to prior years	23	20	0
Reductions for tax positions related to prior years	0	0	(343)
Reductions related to settlements	0	0	0
Reductions related to a lapse of statute	0	0	0
Balance at December 31	$ 9,133	$ 7,029	$ 5,210

Net Loss Per Share Attributab_3

Net Loss Per Share Attributable to Common Shareholders - Schedule of Computation of Basic and Diluted Net Loss Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net loss attributable to common shareholders	$ (125,233)	$ (49,183)	$ (50,214)
Denominator:
Weighted-average common shares outstanding-basic	86,263	80,985	73,345
Dilutive effect of share equivalents resulting from stock options, RSUs, PSUs, ESPP shares, and convertible senior notes (if converted)	0	0	0
Weighted-average common shares outstanding-diluted	86,263	80,985	73,345
Net loss per common share, basic and diluted	$ (1.45)	$ (0.61)	$ (0.68)

Net Loss Per Share Attributab_4

Net Loss Per Share Attributable to Common Shareholders - Schedule of Potential Shares Not Included in the Computation of Diluted Earnings Per Share (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount	7,242	6,754	9,157
Options To Purchase Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount	2,905	4,653	7,987
Unvested RSUs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount	2,635	2,091	1,157
Unvested PSUs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount	108	0	0
ESPP Shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount	10	10	13
Convertible Senior Notes
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount	1,584	0	0