Alteryx Inc - Ordinary Shares (AYX) 10-K 12 Feb 21 2020 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2020	Feb. 05, 2021	Jun. 30, 2020
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-38034
Entity Registrant Name	Alteryx, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	90-0673106
Entity Address, Address Line One	3345 Michelson Drive,
Entity Address, Address Line Two	Suite 400,
Entity Address, City or Town	Irvine,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92612
City Area Code	888
Local Phone Number	836-4274
Title of 12(b) Security	Class A Common Stock, $0.0001 par value per share
Trading Symbol	AYX
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 7.9
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement for its 2021 Annual Meeting of Stockholders, or Proxy Statement, to be filed within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K, are incorporated by reference in Parts II and III. Except with respect to information specifically incorporated by reference in this Annual Report, the Proxy Statement shall not be deemed to be filed as part hereof.
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Central Index Key	0001689923
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		58,860,094
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		8,003,746

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue:
Total revenue	$ 495,308	$ 417,910	$ 253,570
Cost of revenue:
Total cost of revenue	43,839	39,151	22,800
Gross profit	451,469	378,759	230,770
Operating expenses:
Research and development	101,117	69,100	43,449
Sales and marketing	252,820	191,735	109,284
General and administrative	101,439	79,943	48,267
Total operating expenses	455,376	340,778	201,000
Income (loss) from operations	(3,907)	37,981	29,770
Interest expense	(38,119)	(21,844)	(7,378)
Other income, net	14,382	10,434	3,042
Loss on induced conversion and debt extinguishment	(1)	(20,507)	0
Income (loss) before benefit of income taxes	(27,645)	6,064	25,434
Benefit of income taxes	(3,271)	(21,079)	(2,586)
Net income (loss)	$ (24,374)	$ 27,143	$ 28,020
Net Income (loss) per share attributable to common stockholders, basic (in dollars per share)	$ (0.37)	$ 0.43	$ 0.46
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)	$ (0.37)	$ 0.40	$ 0.43
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, basic (in shares)	66,058	63,424	60,829
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, diluted (in shares)	66,058	68,661	64,744
Other comprehensive income (loss), net of tax:
Net unrealized holding gain (loss) on investments, net of tax	$ 925	$ 714	$ (22)
Foreign currency translation adjustments, net of tax	(892)	(1,669)	(195)
Other comprehensive income (loss), net of tax	33	(955)	(217)
Total comprehensive income (loss)	(24,341)	26,188	27,803
Subscription-based software license
Revenue:
Total revenue	237,035	229,194	124,669
Cost of revenue:
Total cost of revenue	5,125	3,923	1,505
PCS and services
Revenue:
Total revenue	258,273	188,716	128,901
Cost of revenue:
Total cost of revenue	$ 38,714	$ 35,228	$ 21,295

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 171,891	$ 409,949
Short-term investments	584,445	376,995
Accounts receivable, net	136,985	129,912
Prepaid expenses and other current assets	79,144	55,129
Total current assets	972,465	971,985
Property and equipment, net	40,645	20,296
Operating lease right-of-use assets	62,508	33,600
Long-term investments	265,800	187,921
Goodwill	37,070	36,910
Intangible assets, net	16,191	22,083
Other assets	70,616	69,543
Total assets	1,465,295	1,342,338
Current liabilities:
Accounts payable	5,340	9,383
Accrued payroll and payroll related liabilities	46,569	53,683
Accrued expenses and other current liabilities	34,987	31,715
Deferred revenue	108,664	83,895
Convertible senior notes, net	72,619	68,154
Total current liabilities	268,179	246,830
Convertible senior notes, net	657,501	630,321
Deferred revenue	3,806	2,733
Operating lease liabilities	53,860	29,293
Other liabilities	5,158	2,660
Deferred income tax, net	0	5,594
Total liabilities	988,504	917,431
Commitments and contingencies (Note 15)
Stockholders’ equity:
Preferred stock, $0.0001 par value: 10,000 shares authorized as of December 31, 2020 and December 31, 2019, respectively; no shares issued and outstanding as of December 31, 2020 and December 31, 2019, respectively	0	0
Common stock, $0.0001 par value: 500,000 Class A shares authorized, 58,634 and 52,056 shares issued and outstanding, as of December 31, 2020 and December 31, 2019, respectively; 500,000 Class B shares authorized, 8,108 and 13,204 shares issued and outstanding as of December 31, 2020 and December 31, 2019, respectively	7	7
Additional paid-in capital	489,025	412,191
Retained earnings (accumulated deficit)	(10,748)	14,235
Accumulated other comprehensive loss	(1,493)	(1,526)
Total stockholders’ equity	476,791	424,907
Total liabilities and stockholders’ equity	$ 1,465,295	$ 1,342,338

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A Common Stock
Common stock par value per share (in dollars per share)	$ 0.0001
Common stock shares authorized (in shares)	500,000,000	500,000,000
Common Stock shares issued (in shares)	58,634,000	52,056,000
Common stock shares outstanding (in shares)	58,634,000	52,056,000
Class B Common Stock
Common stock par value per share (in dollars per share)	$ 0.0001	$ 0.0001
Common stock shares authorized (in shares)	500,000,000	500,000,000
Common Stock shares issued (in shares)	8,108,000	13,204,000
Common stock shares outstanding (in shares)	8,108,000	13,204,000

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Additional Paid-in CapitalCumulative Effect, Period of Adoption, Adjustment	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit)Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2017			59,635
Beginning Balance at Dec. 31, 2017	$ 153,504		$ 5	$ 257,399		$ (103,546)		$ (354)
Beginning Balance (Accounting Standards Update 2014-09) at Dec. 31, 2017		$ 64,197					$ 64,197
Beginning Balance (Accounting Standards Update, All Other) at Dec. 31, 2017		(1,438)			$ 141		(1,579)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued pursuant to stock awards, net of tax withholdings related to vesting of restricted stock units (in shares)			1,925
Shares issued pursuant to stock awards, net of tax withholdings related to vesting of restricted stock units	11,425		$ 1	11,424
Stock-based compensation	16,647			16,647
Equity settled contingent consideration (in shares)			19
Equity settled contingent consideration	656			656
Equity component of Notes, net of issuance costs and tax	43,569			43,569
Purchase of capped calls, net of tax	(14,545)			(14,545)
Cumulative translation adjustment	(195)							(195)
Unrealized gain (loss) on investments	(22)							(22)
Net income (loss)	28,020					28,020
Ending balance (in shares) at Dec. 31, 2018			61,579
Ending Balance at Dec. 31, 2018	$ 301,818		$ 6	315,291		(12,908)		(571)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Receipt of Section 16(b) disgorgement, net of tax effect	$ 3,743			3,743
Shares issued pursuant to stock awards, net of tax withholdings related to vesting of restricted stock units (in shares)			1,755
Shares issued pursuant to stock awards, net of tax withholdings related to vesting of restricted stock units	9,513			9,513
Induced conversion on 2023 Notes, net of tax (in shares)			2,190
Induced conversion on 2023 Notes, net of tax	(7,904)		$ 1	(7,905)
Extinguishment of capped calls (in shares)			(285)
Extinguishment of capped calls	0
Stock-based compensation	33,125			33,125
Equity settled contingent consideration (in shares)			21
Equity settled contingent consideration	750			750
Equity component of Notes, net of issuance costs and tax	124,173			124,173
Purchase of capped calls, net of tax	(66,499)			(66,499)
Cumulative translation adjustment	(1,669)							(1,669)
Unrealized gain (loss) on investments	714							714
Net income (loss)	27,143					27,143
Ending balance (in shares) at Dec. 31, 2019			65,260
Ending Balance at Dec. 31, 2019	424,907	$ (609)	$ 7	412,191		14,235	$ (609)	(1,526)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued pursuant to stock awards, net of tax withholdings related to vesting of restricted stock units (in shares)			1,482
Shares issued pursuant to stock awards, net of tax withholdings related to vesting of restricted stock units	1,919			1,919
Induced conversion on 2023 Notes, net of tax	(1)			(1)
Stock-based compensation	74,916			74,916
Cumulative translation adjustment	(892)							(892)
Unrealized gain (loss) on investments	925							925
Net income (loss)	(24,374)					(24,374)
Ending balance (in shares) at Dec. 31, 2020			66,742
Ending Balance at Dec. 31, 2020	$ 476,791		$ 7	$ 489,025		$ (10,748)		$ (1,493)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ (24,374)	$ 27,143	$ 28,020
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	12,101	8,292	5,218
Non-cash operating lease cost	8,424	5,088	0
Stock-based compensation	74,916	33,125	16,647
Amortization (accretion) of discounts and premiums on investments, net	1,085	(3,030)	(1,382)
Amortization of debt discount and issuance costs	31,654	18,625	6,652
Deferred income taxes	(4,945)	(22,844)	(3,434)
Loss on induced conversion and debt extinguishment	1	20,507	0
Other non-cash operating activities, net	618	(1,328)	1,024
Changes in operating assets and liabilities, net of effect of business acquisitions:
Accounts receivable	(7,368)	(35,325)	(45,640)
Deferred commissions	(7,323)	(20,461)	(12,741)
Prepaid expenses and other current assets and other assets	(16,502)	(34,971)	(16,077)
Accounts payable	(2,746)	2,319	4,530
Accrued payroll and payroll related liabilities	(7,547)	28,651	12,898
Accrued expenses, other current liabilities, operating lease liabilities, and other liabilities	(9,406)	8,091	1,315
Deferred revenue	26,194	310	29,059
Net cash provided by operating activities	74,782	34,192	26,089
Cash flows from investing activities:
Purchases of property and equipment	(26,358)	(11,453)	(6,728)
Cash paid in business acquisitions, net of cash acquired	0	(40,949)	(3,537)
Purchases of investments	(1,141,598)	(602,703)	(445,705)
Sales and maturities of investments	856,110	377,974	185,112
Net cash used in investing activities	(311,846)	(277,131)	(270,858)
Cash flows from financing activities:
Proceeds from issuance of Notes, net of issuance costs	0	783,321	224,246
Principal payments on 2023 Notes	(11)	(145,241)	0
Purchase of capped calls	0	(87,360)	(19,113)
Proceeds from receipt of Section 16(b) disgorgement	0	4,918	0
Proceeds from exercise of stock options	23,125	20,156	14,154
Minimum tax withholding paid on behalf of employees for restricted stock units	(21,206)	(10,643)	(2,730)
Other financing activity	(3,404)	(1,305)	(577)
Net cash provided by (used in) financing activities	(1,496)	563,846	215,980
Effect of exchange rate changes on cash and cash equivalents	801	(444)	(166)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(237,759)	320,463	(28,955)
Cash, cash equivalents, and restricted cash—beginning of year	411,424	90,961	119,916
Cash, cash equivalents, and restricted cash—end of year	173,665	411,424	90,961
Supplemental disclosure of cash flow information:
Cash paid for interest	6,240	930	617
Cash paid for income taxes	2,198	1,630	1,782
Cash paid for amounts included in the measurement of operating lease liabilities	10,310	6,040	0
Supplemental disclosure of noncash investing and financing activities:
Right-of-use assets obtained in exchange for new operating lease liabilities	43,568	13,312	0
Property and equipment recorded in accounts payable	3,983	2,002	720
Reduction of right-of-use assets due to remeasurement	(5,948)	0	0
Consideration for business acquisition included in accrued expenses and other current liabilities and other liabilities	0	3,000	1,200
Contingent consideration settled through issuance of common stock	$ 0	$ 750	$ 656

Organization and Nature of Oper

Organization and Nature of Operations	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Nature of Operations	1. Organization and Nature of Operations Alteryx, Inc. was initially organized in California in March 1997 as SRC, LLC, commenced principal operations in November 1997, changed its name to Alteryx, LLC in March 2010, and converted into a Delaware corporation in March 2011 under the name Alteryx, Inc. Alteryx, Inc. and its subsidiaries, or we, our, or us, are headquartered in Irvine, California. The Alteryx Analytic Process Automation, or APA, software platform unifies analytics, data science and business process automation in one self-service platform to accelerate digital transformation, deliver high-impact business outcomes, accelerate the democratization of data and rapidly upskill modern workforces. Data workers, regardless of technical acumen, are empowered to be curious and solve problems. With the Alteryx APA software platform, users can automate the full range of analytics, data science and processes, embed intelligent decision-making and actions, and empower their organization to enable top and bottom line impact, efficiency gains, and rapid upskilling.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Significant Accounting Policies	2. Significant Accounting Policies Principles of Consolidation and Basis of Presentation Our consolidated financial statements are presented in accordance with accounting standards generally accepted in the United States of America, or U.S. GAAP, and include the accounts of Alteryx, Inc. and its wholly owned subsidiaries after elimination of intercompany transactions and balances. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities at the date of the consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates and assumptions. On an ongoing basis, our management evaluates estimates and assumptions, including those related to determination of standalone selling prices of our products and services, income tax valuations, stock-based compensation, and goodwill and intangible assets valuations and recoverability. We base our estimates on historical data and experience, as well as various other factors that our management believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities. Concentration of Risk Financial instruments, which subject us to concentrations of credit risk, consist primarily of cash and cash equivalents, investments, and trade accounts receivable. We maintain our cash and cash equivalents and investments with three major financial institutions and a portion of such balances exceed or are not subject to Federal Deposit Insurance Corporation, or FDIC, insurance limits. We extend differing levels of credit to customers, do not require collateral deposits, and, when necessary, maintain reserves for potential credit losses based upon the expected collectability of accounts receivable. We manage credit risk related to our customers by following credit approval processes, establishing credit limits, performing periodic evaluations of credit worthiness and applying other credit risk monitoring procedures. Accounts receivable include amounts due from customers with principal operations primarily in the United States. As of December 31, 2019, one of our distributors accounted for 10.6% of our total accounts receivable balance. No other customers accounted for 10% or more of our accounts receivable balance or 10% or more of our revenue in any years presented. Fair Value of Financial Instruments We utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. We determine fair value based on assumptions that market participants would use in pricing an asset or liability in the principal or most advantageous market. When considering market participant assumptions in fair value measurements, the following fair value hierarchy distinguishes between observable and unobservable inputs, which are categorized in one of the following levels: Level 1 Unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date. Level 2 Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active near the measurement date; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The fair value of our money market funds was determined based on “Level 1” inputs. The fair values of our certificates of deposit, commercial paper, U.S. Treasury and agency bonds, and corporate bonds were determined based on “Level 2” inputs. The valuation techniques used to measure the fair values of certificates of deposit and commercial paper included observable market-based inputs for similar assets, which primarily include yield curves and time-to-maturity factors. The valuation techniques used to measure the fair values of U.S. Treasury and agency bonds and corporate bonds included standard observable inputs, including reported trades, quoted market prices, matrix pricing, benchmark yields, broker/dealer quotes, issuer spreads, two-sided markets or benchmark securities and data provided by third parties as many of the bonds are not actively traded. There were no marketable securities measured on a recurring basis in the “Level 3” category. We have not elected the fair value option as prescribed by ASC 825, The Fair Value Option for Financial Assets and Financial Liabilities , for our financial assets and liabilities that are not otherwise required to be carried at fair value. Under ASC 820, Fair Value Measurements and Disclosures, or ASC 820, material financial assets and liabilities not carried at fair value, such as our Notes and accounts receivable and payable, are reported at their carrying values. Cash and Cash Equivalents and Restricted Cash We consider cash and cash equivalents to include short-term, highly liquid investments that are readily convertible to known amounts of cash and so near their maturity that they present an insignificant risk of changes in the value, including investments that mature within three months from the date of original purchase. Amounts receivable from a credit card processor of approximately $2.2 million and $0.6 million as of December 31, 2020 and 2019, respectively, are considered cash equivalents because they were both short-term and highly liquid in nature and are typically converted to cash within three days of the sales transaction. We had restricted cash of $1.8 million and $1.5 million as of December 31, 2020 and 2019, respectively. This balance, presented in other assets on the consolidated balance sheet, relates to amounts required to be restricted as to use by our letters of credit associated with our leases and by our credit card processor. Investments in Marketable Securities Our investments consist of available-for-sale marketable securities, which are composed of fixed income securities, certificates of deposit, and money market funds. Our fixed income securities are predominantly high-grade corporate bonds, U.S. Treasury bonds, and U.S. Agency bonds. The classification of investments is determined at the time of purchase and reevaluated at each balance sheet date. Investments are stated at fair value and are classified as current or non-current based on the nature of the securities as well as their stated maturities. Unrealized gains and losses that are not associated with a credit loss are recognized in other comprehensive income in our consolidated balance sheets. At each balance sheet date, we assess available-for-sale securities in an unrealized loss position to assess whether a decline in the fair value below the amortized cost basis (i.e., impairment) of an available-for-sale debt security is due to credit-related factors or noncredit-related factors. If it is determined that the unrealized losses are credit-related, we record the credit-related impairment as an allowance on the balance sheet with a corresponding adjustment in our consolidated statement of operations and comprehensive income (loss). Credit losses are limited to the amount by which the security’s amortized cost basis exceeds its fair value and both the allowance and the adjustment to net income can be reversed if conditions change. If the unrealized loss is determined not to be credit-related, the corresponding adjustment is made in accumulated other comprehensive income (loss) in our consolidated balance sheets. Accounts Receivable, Allowance for Doubtful Accounts, and Sales Reserves Our accounts receivable consists of amounts due from customers and are typically unsecured. Accounts receivable are recorded at the invoiced amount and are non-interest bearing. The allowance for doubtful accounts is estimated and established by assessing individual accounts receivable over a specific age and dollar value, pooling all other receivables by similar risk characteristics, considering historical loss rates, adjusted for asset-specific characteristics, current conditions, or forecasts, and applying a loss rate to the amortized cost of the asset. Additions to the allowance are charged to general and administrative expenses or revenue in the consolidated statements of operations and comprehensive income (loss), or against deferred revenue in the consolidated balance sheets depending on the timing of the addition in relation to the contract term. Accounts receivable are written off against the allowance when an account balance is deemed uncollectible. We estimate a sales reserve based upon the historical adjustments made to customer billings. Such reserve is recorded as a reduction of revenue and deferred revenue in the consolidated statements of operations and comprehensive income (loss) and balance sheets, respectively. Assets Recognized from the Costs to Obtain a Contract with a Customer We record an asset for the incremental costs of obtaining a contract with a customer, which primarily consists of sales commissions and partner referral fees that are earned upon execution of contracts. We pay commissions for new product sales as well as for renewals of existing contracts, and partner referral fees only for new product sales. For customer contracts in which the commissions paid on new business and renewals are commensurate, we generally amortize these costs over the contractual term of the contract, consistent with the pattern of revenue recognition for each performance obligation. For customer contracts in which the commissions paid on new business and renewals are not commensurate and for partner referral fees, we amortize the costs on new business over an expected period of benefit, which we have determined to be approximately four years. The expected period of benefit was determined by taking into consideration our customer contracts, the duration of our relationships with our customers and the useful life of our technology. In capitalizing and amortizing deferred commissions and partner referral fees, we have elected to apply a portfolio approach. We include amortization of this asset in sales and marketing expense in our consolidated statements of operations and comprehensive income (loss). Royalties We pay royalties associated with licensed third-party syndicated data sold with our platform and we recognize royalty expense to cost of revenue in our consolidated statements of operations and comprehensive income (loss) when incurred. For the years ended December 31, 2020, 2019, and 2018, we recognized royalty expense of approximately $12.4 million, $12.2 million, and $7.2 million respectively. Property and Equipment Property and equipment are stated at historical cost, less accumulated depreciation and amortization. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized on a straight-line basis over the shorter of their estimated useful lives or lease terms. Useful lives by asset category are as follows: Computer equipment 3 years Furniture and fixtures 3 to 7 years Leasehold improvement Shorter of useful life or lease term Repairs and maintenance costs are charged to expense as incurred. Upon the sale or retirement of property and equipment, the cost and the related accumulated depreciation or amortization are removed from the accounts, with any resulting gain or loss included in our consolidated statements of operations and comprehensive income (loss). Intangible Assets Intangible assets consist primarily of acquired developed technology. We determine the appropriate useful life of our intangible assets by performing an analysis of expected cash flows of the acquired assets. Intangible assets are amortized over their estimated useful lives of two Impairment of Long-Lived Assets We review our long-lived assets for impairment whenever events or changes in circumstances indicate the carrying amount of such assets may not be fully recoverable. Recoverability of these assets is determined by comparing the forecasted undiscounted cash flows attributable to such assets to their carrying value. If the carrying value of the assets exceeds the forecasted undiscounted cash flows, then the assets are written down to their fair value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the assets. Business Combinations The results of businesses acquired in a business combination are included in our consolidated financial statements from the date of the acquisition. We allocate the purchase price, including the fair value of any non-cash and contingent consideration, to the identifiable assets and liabilities of the relevant acquired business at their acquisition date fair values. Any excess consideration over the fair value of assets acquired and liabilities assumed is recognized as goodwill. Contingent consideration payable in cash or a fixed dollar amount settleable in a variable number of shares is classified as a liability and recorded at fair value, with changes in fair value recorded in general and administrative expenses each period. Transaction costs associated with business combinations are expensed as incurred, and are included in general and administrative expense in the consolidated statements of operations and comprehensive income (loss). We perform valuations of assets acquired, liabilities assumed, and contingent consideration and allocate the purchase price to its respective assets and liabilities. Determining the fair value of assets acquired, liabilities assumed, and contingent consideration requires us to use significant judgment and estimates, including the selection of valuation methodologies, estimates of future revenue, costs and cash flows, discount rates, the probability of achievement of specified milestones, and selection of comparable companies. We engage the assistance of valuation specialists in concluding on fair value measurements in connection with determining fair values of assets acquired, liabilities assumed, and contingent consideration in a business combination. Goodwill Goodwill represents the excess of the purchase price over the fair value of net assets acquired in a business combination. We test goodwill for impairment in accordance with the provisions of ASC 350, Intangibles – Goodwill and Other, or ASC 350. Goodwill is tested for impairment at least annually at the reporting unit level or whenever events or changes in circumstances indicate that goodwill might be impaired. Events or changes in circumstances which could trigger an impairment review include a significant adverse change in legal factors or in the business climate, unanticipated competition, loss of key personnel, significant changes in the use of the acquired assets or our strategy, significant negative industry or economic trends, or significant underperformance relative to expected historical or projected future results of operations. ASC 350 provides that an entity has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then additional impairment testing is not required. However, if an entity concludes otherwise, then it is required to perform an impairment test. The impairment test involves comparing the estimated fair value of a reporting unit with its book value, including goodwill. If the estimated fair value exceeds book value, goodwill is considered not to be impaired. If, however, the fair value of the reporting unit is less than book value, then an impairment loss is recognized in an amount equal to the amount that the book value of the reporting unit exceeds its fair value, not to exceed the total amount of goodwill allocated to the reporting unit. We have one reporting unit and we test for goodwill impairment annually during the fourth quarter of each calendar year using a quantitative assessment. At each of December 31, 2020 and 2019, we determined our goodwill was not impaired as our fair value significantly exceeded the carrying value of our net assets. Revenue Recognition Our revenue is derived from the licensing of subscription-based software, data subscription services, and professional services, including training and consulting services. The subscription-based license generally includes access to hosted services and software and post-contract support, or PCS, which provides the customer the right to receive when-and-if-available unspecified future updates, upgrades and enhancements, and technical product support. The core principle of ASC 606, Revenue from Contracts with Customers , or ASC 606, is to recognize revenue upon the transfer of goods or services to our customers in an amount that reflects the consideration to which we expect to be entitled. In order to adhere to this core principle, we apply the following five-step approach: • identify the contract with a customer; • identify the performance obligations in the contract; • determine the transaction price; • allocate the transaction price to the performance obligations in the contract; and • recognize revenue when (or as) we satisfy a performance obligation. We only apply the five-step model to contracts when it is probable that we will collect the consideration we are entitled to in exchange for goods or services we transfer to the customer. Revenue is measured based on consideration specified in a contract with a customer, and excludes any taxes we collect concurrent with revenue-producing activities. Most of our contracts contain a fixed transaction price. Our subscription agreements typically range from one to three years and are billed annually in advance with net payment terms of 60 days or less. The primary purpose of our payment and invoicing terms is to provide customers with predictable ways to purchase our software and services, and not to provide customers with financing. Our contracts with customers typically contain multiple performance obligations. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. All of our licenses are sold as subscription-based, on-premise, licenses and are bundled with maintenance and support, or PCS, and cloud-based offerings. In addition to our on-premise licenses, we sell subscriptions to third-party syndicated data and provide professional service offerings primarily related to trainings for our customers. We allocate the transaction price of the contract to each performance obligation using the relative standalone selling price, or SSP, of each distinct good or service in the contract. We determine estimates of SSP based on sales of goods and services sold on a standalone basis, our overall pricing strategies, market conditions, including the geographic locations in which the products are sold, the useful life of our products, and market data. We review the SSP for each of our performance obligations at least every financial reporting period and update it when appropriate to ensure that the practices employed reflect our recent pricing experience and maximize the use of observable data. We recognize revenue when we satisfy a performance obligation by transferring control of a good or service to a customer. Revenue related to our subscription-based licenses is recognized at a point in time when the platform is first made available to the customer, or the beginning of the subscription term, if later. Revenue related to PCS, cloud-based offerings, and data subscriptions is recognized ratably over the subscription terms. Professional services revenue is recognized when the services are provided to the customer, or when they expire. Contract Assets and Contract Liabilities Timing may differ between the satisfaction of performance obligations and the invoicing and collection of amounts related to our contracts with customers. Contract assets primarily relate to unbilled amounts for contracts with customers for which the amount of revenue recognized exceeds the amount billed to the customer. Contract assets are transferred to accounts receivable when the right to invoice becomes unconditional. Contract assets are recorded as current if the invoice will be delivered to the customer within the succeeding 12-month period with the remaining recorded as long-term. Current contract assets are included in prepaid expenses and other current assets and long-term contract assets are included in other assets on our consolidated balance sheets. Contract liabilities, or deferred revenue, are recorded for amounts that are collected in advance of the satisfaction of performance obligations. These liabilities are classified as current if the performance obligation will be satisfied during the succeeding 12-month period and the remaining portion is recorded as non-current deferred revenue in our consolidated balance sheet. Cost of Revenue Cost of revenue is accounted for in accordance with ASC 705, Cost of Sales and Services , and consists of employee-related costs, including salaries and bonuses, stock-based compensation expense, and employee benefit costs associated with our customer support and professional services organizations, expenses related to hosting and operating our cloud infrastructure in a third-party data center, licenses of third-party syndicated data, amortization and impairment of acquired completed technology intangible assets, and related overhead expenses. Out-of-pocket travel costs related to the delivery of professional services are typically reimbursed by the customers and are accounted for as both revenue and cost of revenue in the period in which the cost is incurred. Research and Development Research and development expense consists primarily of employee-related costs, including salaries and bonuses, stock-based compensation expense, and employee benefits costs, depreciation of equipment used in research and development for our research and development employees, third-party contractor costs, and related allocated overhead costs. Product development expenses, other than software development costs qualifying for capitalization, are expensed as incurred. Software Development Costs Costs incurred in the development of new software products and enhancements to existing software products to be accounted for under software revenue recognition guidance are accounted for in accordance with ASC 985-20, Costs of Software to be Sold, Leased, or Marketed, or ASC 985-20. These costs, consisting primarily of salaries and related payroll costs, are expensed as incurred until technological feasibility has been established. After technological feasibility is established, costs are capitalized in accordance with ASC 985-20. Because our process for developing software is completed concurrently with the establishment of technological feasibility, no internally generated software development costs have been capitalized as of December 31, 2020 and 2019. We account for costs to develop or obtain internal-use software and implementation costs incurred in hosting arrangements in accordance with ASC 350-40, Internal-Use Software, or ASC 350-40. We also account for costs of significant upgrades and enhancements resulting in additional functionality under ASC 350-40. These costs are primarily software purchased for internal-use, purchased software licenses, implementation costs, and development costs related to our hosted product, which is accessed by customers on a subscription basis. Costs incurred for maintenance, training, and minor modifications or enhancements are expensed as incurred. Internal-use software is amortized on a straight-line basis over its estimated useful life, which is generally three years. Management evaluates the useful lives of these assets on an annual basis and tests for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. Development costs related to internal-use software were insignificant during each of the years ended December 31, 2020 and 2019, and immaterial costs related to the implementation of cloud computing arrangements were included in prepaid expenses and other current assets on our consolidated balance sheets as of December 31, 2020. Convertible Senior Notes Our Notes (as defined in Note 9, Convertible Senior Notes , of these notes to our consolidated financial statements) are accounted for in accordance with ASC 470‑20, Debt with Conversion and Other Options , or ASC 470-20. Pursuant to ASC 470‑20, issuers of certain convertible debt instruments that have a net settlement feature and may be settled wholly or partially in cash upon conversion are required to separately account for the liability (debt) and equity (conversion option) components of the instrument. The carrying amount of the debt component for each series of our Notes was calculated by estimating the fair value of similar liabilities that do not have associated convertible features. The carrying amount of the equity component for each series of our Notes was determined by deducting the fair value of the debt component from their respective principal amounts. The difference between the principal amount of each series of our Notes and its respective fair value of debt component are amortized to interest expense over its respective terms using the effective interest method. The equity component, net of issuance costs and deferred tax effects, of each series of our Notes is presented within additional paid-in-capital in our consolidated balance sheet, and will not be remeasured as long as it continues to meet the requirements for equity classification. In accounting for the issuance costs related to our Notes, the allocation of issuance costs incurred between the debt and equity components was based on their relative values. Leases Through December 31, 2018, we recognized rent expense related to operating leases on a straight-line basis over the lease term and, accordingly, recorded the difference between rent payments and rent expense as a deferred rent liability. Effective January 1, 2019, we adopted ASU 2016-02, Leases , or ASC 842. Under ASC 842, we determine if an arrangement is a lease at contract inception. Operating leases are included in operating lease right-of-use assets, accrued expenses and other current liabilities and operating lease liabilities in our consolidated balance sheets. Operating lease charges are recorded in cost of revenue and operating expenses in our consolidated statements of operations and comprehensive income (loss). Operating lease right-of-use assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. We do not separate lease and non-lease components for all underlying asset classes. As most of our leases do not provide a readily determinable implicit rate, we estimate our incremental borrowing rate to discount the lease payments based on information available at lease commencement. We determine our incremental borrowing rate for each lease based primarily on the lease term and the economic environment of the applicable country or region. The operating lease right-of-use asset also includes any lease payments made and excludes lease incentives. The lease term includes options to extend or terminate when we are reasonably certain the option will be exercised. In general, we are not reasonably certain to exercise such options. We recognize lease expense for minimum lease payments on a straight-line basis over the lease term, while variable lease payments, such as common area maintenance, are recognized as incurred. We elected the practical expedient to not recognize operating lease right-of-use assets and operating lease liabilities that arise from short-term leases (i.e., leases with a term of 12 months or less). Advertising Costs Advertising costs are expensed as incurred. We incurred advertising costs of approximately $16.3 million, $17.8 million, and $9.1 million for the years ended December 31, 2020, 2019, and 2018, respectively. Such costs primarily relate to our annual user conferences, online and print advertising as well as sponsorship of public marketing events, and are reflected in sales and marketing expense in our consolidated statements of operations and comprehensive income (loss). Stock-Based Compensation We recognize stock-based compensation expense in accordance with the provisions of ASC 718, Compensation—Stock Compensation, or ASC 718. ASC 718 requires the measurement and recognition of compensation expense for all stock-based payment awards made to employees and directors based on the grant date fair values of the awards. We use the Black-Scholes option-pricing method for valuing stock options and shares granted under the employee stock purchase plan. Restricted stock units, or RSUs, are valued based on the fair value of our common stock on the date of grant, less our expected dividend yield. For awards that vest solely based on continued service, the fair value of an award is recognized as an expense over the requisite service period on a straight-line basis. For awards that contain performance conditions, the fair value of an award is recognized based on the probability of the performance condition being met using the graded vesting method. Stock-based compensation expense is included in cost of revenue and operating expenses within our consolidated statements of operations and comprehensive income (loss) based on the classification of the individual earning the award. The determination of the grant date fair value of stock-based awards is affected by the estimated fair value per share of our common stock as well as other highly subjective assumptions, including, but not limited to, the expected term of the stock-based awards, expected stock price volatility, risk-free interest rates, and expected dividends yields, which are estimated as follows: • Expected term . We determine the expected term of the awards using the simplified method, which estimates the expected term based on the average of the vesting period and contractual term of the stock option. • Expected volatility . We estimate the expected volatility based on our own historical volatility as well as the volatility of similar publicly held entities (referred to as “guideline companies”) over a period equivalent to the expected term of the awards. In evaluating the similarity of guideline companies to us, we considered factors such as industry, stage of life cycle, size, and financial leverage. We intend to continue to consistently apply this process using the same or similar guideline companies to estimate the expected volatility until sufficient historical information regarding the volatility of the share price of our common stock becomes available. • Risk-free interest rate . The risk-free interest rate used to value our stock-based awards is based on the U.S. Treasury yield in effect at the time of grant for a period consistent with the expected term of the award. • Estimated dividend yield . The expected dividend is assumed to be zero as we have never declared or paid any cash dividends and do not currently intend to declare dividends in the foreseeable future. The assumptions used in calculating the fair value of stock-based awards represent our best estimates, but these estimates involve inherent uncertainties and the application of judgment. As a result, if factors change or we use different assumptions, stock-based compensation expense could be materially different in the future. Foreign Currency Remeasurement, Translation, and Transactions The functional currency of our wholly owned subsidiaries is the currency of the primary economic environment in which the entity operates. Assets and liabilities denominated in currencies other than the functional currency are remeasured using the current exchange rate for monetary accounts

Revenue

Revenue	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue	3. Revenue Disaggregation of Revenue The disaggregation of revenue by region was as follows (in thousands): Year Ended December 31, Revenue by region: 2020 2019 2018 United States $ 338,190 $ 296,108 $ 178,774 International 157,118 121,802 74,796 Total $ 495,308 $ 417,910 $ 253,570 No countries outside of the United States comprised more than 10% of revenue during the year ended December 31, 2020. Revenue attributable to the United Kingdom comprised 10.7% and 10.2% of total revenue for the years ended December 31, 2019 and 2018, respectively. Other than the United Kingdom for the years ended December 31, 2019 and 2018, no other country outside the United States comprised more than 10% of revenue for any of the periods presented. Our operations outside the United States include sales offices in Australia, Canada, France, Germany, Japan, Singapore, the United Arab Emirates and the United Kingdom, and a research and development center in Ukraine and the Czech Republic. Revenue by location is determined by the billing address of the customer. Revenue related to our subscription-based software licenses is recognized at a point in time when the platform is first made available to the customer, or the beginning of the subscription term, if later. Revenue recognized related to post contract support, or PCS, service, and hosted services is recognized ratably over the subscription term, with the exception of professional services related to training services. Revenue related to professional services is recognized at a point in time as the services are performed, and represents less than 5% of total revenue for all periods presented. Contract Assets and Contract Liabilities As of December 31, 2020 and 2019, our contract assets are expected to be transferred to receivables within the next 12 to 24 months and, with respect to these contract assets, $25.4 million and $18.5 million, respectively, is included in prepaid expenses and other current assets, and $37.2 million and $39.3 million, respectively, are included in other assets on our consolidated balance sheets. There were no impairments of contract assets during each of the years ended December 31, 2020 and 2019. During the years ended December 31, 2020 and 2019, we recognized $83.9 million and $84.0 million, respectively, of revenue related to amounts that were included in deferred revenue as of January 1, 2020 and 2019, respectively. Assets Recognized from the Costs to Obtain our Contracts with Customers We recognize an asset for the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. This primarily consists of sales commissions and partner referral fees that are earned upon execution of the related contracts. We amortize these deferred commissions, which include partner referral fees, proportionate with related revenues over the benefit period. A summary of the activity impacting our deferred commissions during the years ended December 31, 2020 and 2019 are presented below (in thousands): Year Ended December 31, 2020 2019 Beginning balance $ 43,035 $ 22,391 Additional deferred commissions 46,109 55,024 Amortization of deferred commissions and other adjustments (37,958) (34,380) Ending balance $ 51,186 $ 43,035 As of December 31, 2020 and 2019, $24.8 million and $17.5 million, respectively, of our deferred commissions are expected to be amortized within the next 12 months, and therefore are included in prepaid assets and other current assets on our consolidated balance sheets. The remaining amount of our deferred commissions are included in other long-term assets. There were no impairments of assets related to deferred commissions during each of the years ended December 31, 2020 and 2019. There were no assets recognized related to the costs to fulfill contracts during each of the years ended December 31, 2020 and 2019 as these costs were not material. Remaining Performance Obligations Transaction price allocated to the remaining performance obligations represents contracted revenue that has not yet been recognized, which includes deferred revenue on our consolidated balance sheets and unbilled amounts that will be recognized as revenue in future periods. As of December 31, 2020 and 2019, we had an aggregate transaction price of $484.3 million and $407.0 million, respectively, allocated to unsatisfied performance obligations related primarily to PCS, cloud-based offerings, and subscriptions to third-party syndicated data. As of December 31, 2020 and 2019, we expect to recognize $434.9 million and $340.1 million, respectively, as revenue over the next 24 months with the remaining amount recognized thereafter.

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Business Combinations	4. Business Combinations Goodwill represents the excess of the purchase price consideration over the fair value of the underlying intangible assets and net liabilities assumed. We believe the amount of goodwill resulting from acquisitions during the years ended December 31, 2019 and 2018 are primarily attributable to expected synergies from an assembled workforce, increased development capabilities, offerings to customers, and enhanced opportunities for growth and innovation. Pro forma information and revenue and operating results of the companies acquired during the years ended December 31, 2019 and 2018 have not been presented as the impacts are not significant to our consolidated financial statements. The consolidated financial statements include the results of operations of each acquisition commencing as of the acquisition date of the respective acquisition. Acquisition-related costs associated with the below acquisitions were not material, and are recorded in general and administrative expense in the consolidated statements of operations and comprehensive income (loss). 2019 Acquisitions Feature Labs, Inc. On October 3, 2019, we acquired 100% of the outstanding equity of Feature Labs, Inc., a Delaware corporation, or Feature Labs, pursuant to an Agreement and Plan of Merger, or the Feature Labs Merger Agreement, dated as of October 2, 2019. The acquisition was made to augment our machine learning capabilities and establish an engineering hub on the East Coast of the U.S. The aggregate consideration payable in exchange for all of the outstanding equity interests of Feature Labs was $25.2 million in cash, subject to customary adjustments set forth in the Feature Labs Merger Agreement. In connection with the acquisition, we entered into employment agreements with certain employees from Feature Labs, which include up to $12.5 million in equity incentive awards based on continued employment over a period of 48 months with respect to certain time-based equity incentive awards and continued employment and the achievement of certain milestones over a period of 36 months with respect to certain performance-based equity incentive awards. As the awards are subject to the continued employment of the employees, they were excluded from the purchase consideration, and will be recognized as post-acquisition compensation. The purchase consideration for the acquisition of $25.2 million consisted of $7.9 million in developed technology, $18.0 million of goodwill, which was not tax deductible, and $0.7 million of net liabilities assumed. We determined the fair value of the developed technology acquired using the multi-period excess earnings model, which is a variation of the income approach that estimates the value of the assets based on the present value of the incremental after-tax cash flow attributable only to the intangible assets. This model utilizes certain unobservable inputs classified as Level 3 measurements as defined by ASC 820, Fair Value Measurements and Disclosures , or ASC 820. Key inputs utilized in the models include a discount rate of 40.0% and estimated revenue and expense forecasts. Based on the valuation model, we determined the fair value of the developed technology to be $7.9 million with an amortization period of 7.0 years. ClearStory Data Inc. On April 4, 2019, we acquired 100% of the outstanding equity of ClearStory Data Inc., a Delaware corporation, or ClearStory Data, pursuant to an Agreement and Plan of Merger, or the ClearStory Merger Agreement, dated as of March 28, 2019. The acquisition was made to augment our research and development team and acquire certain developed technology. The aggregate consideration payable in exchange for all of the outstanding equity interests of ClearStory Data was $19.6 million in cash, subject to customary adjustments set forth in the ClearStory Merger Agreement. The acquisition of ClearStory Data included $3.0 million of cash consideration held back for customary indemnification matters for a period of 18 months following the acquisition date. As of December 31, 2020, cash held back for customary indemnification matters had been released. In connection with the acquisition, we entered into employment agreements with certain employees from ClearStory Data, which include up to $6.0 million in aggregate cash payments based on the achievement of certain milestones over a period of 24 months. As the awards are subject to the continued employment of the employees, they were excluded from the purchase consideration, and will be recognized as post-acquisition compensation. The purchase consideration for the acquisition of $19.6 million consisted of $10.7 million in developed technology, $9.5 million of goodwill, which is tax deductible, and $0.6 million of net liabilities assumed. We determined the fair value of the developed technology acquired using the replacement cost model which uses estimated costs to recreate the technology. This model utilizes certain unobservable inputs classified as Level 3 measurements as defined by ASC 820. Key inputs utilized in the models include a discount rate of 20% and estimated costs to recreate the technology. Based on the valuation model, we determined the fair value of the developed technology to be $10.7 million with an amortization period of 4.0 years. 2018 Acquisition Alteryx ANZ Pty Limited In February 2018, we acquired 100% of the outstanding equity of Alteryx ANZ Pty Limited, or Alteryx ANZ, in Sydney, Australia, our exclusive master distributor in Australia and New Zealand. The total purchase consideration for the acquisition was approximately $5.7 million consisting of (i) $3.3 million in cash consideration, (ii) $1.2 million in contingent consideration payable in cash, and (iii) $1.2 million for the settlement of preexisting relationships. The allocation of the total purchase price for this acquisition was $3.2 million of net tangible assets, $1.6 million of identifiable intangible assets, consisting of customer contracts and relationships, and $0.9 million of residual goodwill, which was not tax deductible. We determined the fair value of the customer contracts and relationships acquired in the acquisition using the multi-period excess earnings model. This model utilizes certain unobservable inputs, including discounted cash flows, historical and projected financial information, and customer attrition rates, classified as Level 3 measurements as defined by ASC 820. Based on the valuation models, we determined the fair value of the customer contracts and relationships to be $1.6 million with a weighted-average amortization period of 7.0 years.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	5. Fair Value Measurements Instruments Measured at Fair Value on a Recurring Basis. The following tables present our cash and cash equivalents and investments’ costs, gross unrealized gains (losses), and fair value by major security type recorded as cash and cash equivalents or short-term or long-term investments (in thousands): As of December 31, 2020 Cost Net Fair Value Cash and Short-term Long-term Cash $ 88,991 $ — $ 88,991 $ 88,991 $ — $ — Level 1: Money market funds 35,010 — 35,010 35,010 — — Subtotal 35,010 — 35,010 35,010 — — Level 2: Commercial paper 161,124 (8) 161,116 46,491 114,625 — Certificates of deposit 2,800 — 2,800 — 2,800 — U.S. Treasury and agency bonds 554,860 1,220 556,080 1,399 358,822 195,859 Corporate bonds 177,790 349 178,139 — 108,198 69,941 Subtotal 896,574 1,561 898,135 47,890 584,445 265,800 Level 3 — — — — — — Total $ 1,020,575 $ 1,561 $ 1,022,136 $ 171,891 $ 584,445 $ 265,800 As of December 31, 2019 Cost Net Fair Value Cash and Short-term Long-term Cash $ 53,039 $ — $ 53,039 $ 53,039 $ — $ — Level 1: Money market funds 223,580 — 223,580 223,580 — — Subtotal 223,580 — 223,580 223,580 — — Level 2: Commercial paper 217,140 (6) 217,134 98,325 118,809 — Certificates of deposit 1,000 — 1,000 — — 1,000 U.S. Treasury and agency bonds 294,953 199 295,152 35,005 161,767 98,380 Corporate bonds 184,516 444 184,960 — 96,419 88,541 Subtotal 697,609 637 698,246 133,330 376,995 187,921 Level 3 — — — — — — Total $ 974,228 $ 637 $ 974,865 $ 409,949 $ 376,995 $ 187,921 There were no transfers between Level 1, Level 2, or Level 3 securities during each of the years ended December 31, 2020 and 2019. All long-term investments had maturities between one We review our marketable securities on a regular basis to evaluate whether or not any security has experienced an other-than-temporary decline in fair value. We consider factors such as the length of time and extent to which the market value has been less than the cost, the financial condition and near-term prospects of the issuer and our intent to sell, and whether it is more likely than not we will be required to sell the investment before recovery of the investment’s amortized cost basis. We have determined that the gross unrealized losses of less than $0.1 million with respect to our available-for-sale securities as of both December 31, 2020 and 2019 were due to changes in market rates, and we have determined the losses are temporary in nature. These gross unrealized losses were classified in accumulated other comprehensive income (loss) in our consolidated balance sheets as of December 31, 2020 and 2019. Interest income from our marketable securities was $10.5 million, $9.2 million, and $5.4 million for the years ended December 31, 2020, 2019, and 2018, respectively. Instruments Not Recorded at Fair Value on a Recurring Basis. We estimate the fair value of our Notes carried at face value less unamortized discount and issuance costs quarterly for disclosure purposes. The estimated fair value of our Notes is determined by Level 2 inputs and is based on observable market data including prices for similar instruments. As of December 31, 2020 and 2019, the fair value of our Notes were $1.1 billion and $956.8 million, respectively. The carrying amounts of our financial instruments, including cash, accounts receivable, prepaid expenses and other current assets, accounts payable, and accrued liabilities, approximate their current fair value because of their nature and relatively short maturity dates or durations. Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis. See Note 4, Business Combinations , and Note 8, Goodwill and Intangible Assets

Allowance for Doubtful Accounts

Allowance for Doubtful Accounts and Sales Reserves	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Allowance for Doubtful Accounts and Sales Reserves	6. Allowance for Doubtful Accounts and Sales Reserves The following table summarizes the changes in the allowance for doubtful accounts and sales reserve included in accounts receivable in our consolidated balance sheets (in thousands): Year Ended December 31, 2020 2019 2018 Beginning balance $ 2,662 $ 2,297 $ 1,714 Provision 2,544 1,513 2,160 Recoveries (1,225) (600) (693) Charge-offs (867) (548) (884) Ending balance $ 3,114 $ 2,662 $ 2,297 The following table summarizes the changes in the allowance applied to our contract assets in our consolidated balance sheets (in thousands): Year Ended December 31, 2020 2019 2018 Beginning balance $ 205 $ 180 $ 62 Adoption of new accounting standard - ASC 326 609 — — Provision 1,818 197 197 Recoveries (110) (172) (79) Charge-offs (84) — — Ending balance $ 2,438 $ 205 $ 180 During the twelve months ended December 31, 2020, we analyzed the risk associated with each portfolio segment within our accounts receivables and contract assets balances. As a result of the economic uncertainties caused by the impact of the COVID-19 pandemic, we aggregated our portfolio into pools using different risk profiles. We increased our expected credit loss rates for customers in industries that we expect will be more adversely impacted by the economic downturn caused by the COVID-19 pandemic, resulting in a total increase of $0.6 million included in our provisions for expected credit losses during the twelve months ended December 31, 2020.

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Property and Equipment	7. Property and Equipment Property and equipment, net consisted of the following (in thousands): Year Ended December 31, 2020 2019 Computer equipment & software $ 14,627 $ 10,521 Furniture and fixtures 9,941 4,972 Leasehold improvements 22,006 10,438 Construction in process 8,618 3,771 $ 55,192 $ 29,702 Less: Accumulated depreciation and amortization (14,547) (9,406) Total property and equipment, net $ 40,645 $ 20,296 Depreciation and amortization expense for the years ended December 31, 2020, 2019, and 2018 was approximately $8.1 million, $4.3 million, and $3.2 million, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	8. Goodwill and Intangible Assets The change in carrying amount of goodwill was as follows (in thousands): Goodwill as of December 31, 2018 $ 9,494 Goodwill recorded in connection with acquisition 27,437 Effects of foreign currency translation (21) Goodwill as of December 31, 2019 $ 36,910 Effects of foreign currency translation 160 Goodwill as of December 31, 2020 $ 37,070 Intangible assets consisted of the following (in thousands, except years): As of December 31, 2020 Weighted-Average Gross Carrying Accumulated Net Carrying Customer Relationships 7.0 $ 1,652 $ (678) $ 974 Completed Technology 5.7 21,780 (6,563) 15,217 $ 23,432 $ (7,241) $ 16,191 As of December 31, 2019 Weighted-Average Gross Carrying Accumulated Net Carrying Customer Relationships 7.0 $ 1,503 $ (402) $ 1,101 Completed Technology 5.4 27,821 (6,839) 20,982 $ 29,324 $ (7,241) $ 22,083 During the twelve months ended December 31, 2020, we recorded an impairment charge of $2.0 million, related to certain developed technology assets, due to our strategic decision to discontinue further investment and enhancements in the standalone existing technology. We classified intangible asset amortization expense in the accompanying consolidated statements of operations and comprehensive income (loss) as follows (in thousands): Year Ended December 31, 2020 2019 2018 Cost of revenue $ 3,758 $ 3,801 $ 1,809 Sales and marketing 212 221 220 Total $ 3,970 $ 4,022 $ 2,029 The following table presents our estimates of remaining amortization expense for each of the five succeeding fiscal years and thereafter for intangible assets at December 31, 2020 (in thousands): 2021 $ 4,622 2022 4,622 2023 2,630 2024 1,954 2025 1,377 Thereafter 986 Total amortization expense $ 16,191

Convertible Senior Notes

Convertible Senior Notes	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Convertible Senior Notes	9. Convertible Senior Notes The following table presents details of our convertible senior notes, which are further discussed below (original principal in thousands): Month Issued Maturity Date Original Principal (including over-allotment) Coupon Interest Rate Effective Interest Rate Conversion Rate Initial Conversion Price 2023 Notes May and June 2018 June 1, 2023 $ 230,000 0.5 % 7.00 % $ 22.5572 $ 44.33 2024 Notes August 2019 August 1, 2024 $ 400,000 0.5 % 4.96 % $ 5.2809 $ 189.36 2026 Notes August 2019 August 1, 2026 $ 400,000 1.0 % 5.41 % $ 5.2809 $ 189.36 As further defined and described below, the 2024 Notes and the 2026 Notes are together referred to as the 2024 & 2026 Notes, and the 2023 Notes and the 2024 & 2026 Notes are collectively referred to as the Notes. In May and June 2018, we sold $230.0 million aggregate principal amount of our 0.50% Convertible Senior Notes due 2023, or the 2023 Notes, including the initial purchasers’ exercise in full of their option to purchase an additional $30.0 million of the 2023 Notes, in a private offering to qualified institutional buyers pursuant to Rule 144A promulgated under the Securities Act of 1933, as amended, or the Act. The 2023 Notes are our senior, unsecured obligations, and interest is payable semi-annually in arrears on June 1 and December 1 of each year beginning December 1, 2018. In August 2019, we sold $400.0 million aggregate principal amount of our 0.50% Convertible Senior Notes due 2024, or the 2024 Notes, and $400.0 million aggregate principal amount of our 1.00% Convertible Senior Notes due 2026, or the 2026 Notes, including the initial purchasers’ exercise in full of their options to purchase an additional $50.0 million of the 2024 Notes and an additional $50.0 million of the 2026 Notes, in a private offering to qualified institutional buyers pursuant to Rule 144A promulgated under the Act. The 2024 & 2026 Notes are our senior, unsecured obligations, and interest is payable semi-annually in arrears on February 1 and August 1 of each year beginning February 1, 2020. Prior to the close of business on the business day immediately preceding March 1, 2023, or the 2023 Conversion Date, in the case of the 2023 Notes, or May 1, 2024, or the 2024 Conversion Date, in the case of the 2024 Notes, or May 1, 2026, or the 2026 Conversion Date, in the case of the 2026 Notes, the respective Notes are convertible at the option of holders only upon satisfaction of certain conditions and during certain periods, and thereafter, at any time until the close of business on the second scheduled trading day immediately preceding the relevant maturity date. The applicable conversion rate is subject to customary adjustments for certain events as described in the applicable indenture between us and U.S. Bank National Association, as trustee, or, collectively, the Indentures. Upon conversion, the Notes may be settled in shares of our Class A common stock, cash or a combination of cash and shares of our Class A common stock, at our election. It is our current intent to settle the principal amount of the Notes with cash. During the year ended December 31, 2019, a portion of the 2023 Notes were exchanged, as further discussed below. Prior to the close of business on the business day immediately preceding the applicable Conversion Date, the applicable series of Notes is convertible at the option of the holders under the following circumstances: • during any calendar quarter commencing after the calendar quarter subsequent to the calendar quarter in which the applicable series of Notes was issued (and only during such calendar quarter), if the last reported sale price of our Class A common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the applicable conversion price of the applicable series of Notes on each applicable trading day; • during the five business day period after any five consecutive trading day period in which the trading price per $1,000 principal amount of the applicable series of Notes for each day of that five day consecutive trading day period was less than 98% of the product of the last reported sale price of our Class A common stock and the applicable conversion rate of the applicable series of Notes on such applicable trading day; or • upon the occurrence of specified corporate events described in the applicable Indenture. For at least 20 trading days during the period of 30 consecutive trading days ending December 31, 2020, the last reported sale price of our Class A common stock was greater than or equal to 130% of the conversion price of the 2023 Notes on each applicable trading day. As a result, the 2023 Notes are convertible at the option of the holders during the quarter ending March 31, 2021 and were classified as current liabilities on the consolidated balance sheet as of December 31, 2020. As of December 31, 2020, the if-converted value of the 2023 Notes exceeded its principal amount by $148.1 million. As of December 31, 2020, the 2024 & 2026 Notes were not currently convertible. We may not redeem any series of Notes prior to the relevant maturity date. Holders of any series of Notes have the right to require us to repurchase for cash all or a portion of their applicable series of Notes at 100% of its respective principal amount, plus any accrued and unpaid interest, upon the occurrence of a fundamental change as defined in the applicable Indenture for such series of Notes. We are also required to increase the conversion rate for holders who convert their Notes in connection with certain corporate events occurring prior to the relevant maturity date. The Notes are our senior unsecured obligations and rank senior in right of payment to any of our indebtedness and other liabilities that are expressly subordinated in right of payment to the Notes, equal in right of payment among all series of Notes and to any other existing and future indebtedness and other liabilities that are not subordinated, effectively junior in right of payment to any of our secured indebtedness and other liabilities to the extent of the value of the assets securing such indebtedness and other liabilities, and structurally junior in right of payment to all of our existing and future indebtedness and other liabilities (including trade payables) of our current or future subsidiaries. Capped Call Transactions In connection with the pricing of the 2023 Notes, we entered into privately negotiated capped call transactions with an affiliate of one of the initial purchasers of the 2023 Notes and other financial institutions. In connection with the pricing of the 2024 & 2026 Notes, we entered into privately negotiated capped call transactions with other financial institutions. The capped call transactions are expected generally to reduce or offset potential dilution to holders of our common stock and/or offset the potential cash payments that we could be required to make in excess of the principal amount upon any conversion of the applicable series of Notes under certain circumstances, with such reduction and/or offset subject to a cap based on the cap price. Under the capped call transactions, we purchased capped call options that in the aggregate relate to the total number of shares of our Class A common stock underlying the applicable series of Notes, with an initial strike price of approximately $44.33 per share in the case of the 2023 Notes, which corresponds to the initial conversion price of the 2023 Notes, and approximately $189.36 per share in the case of the 2024 & 2026 Notes, which corresponds to the initial conversion price of each of the 2024 & 2026 Notes. Further, the capped call options are subject to anti-dilution adjustments substantially similar to those applicable to the conversion rate of the applicable series of Notes, and have a cap price of $62.22 per share in the case of the 2023 Notes, and $315.60 per share in the case of the 2024 & 2026 Notes. The cost of the purchased capped calls of $19.1 million in the case of the 2023 Notes and $87.4 million in the case of the 2024 & 2026 Notes was recorded as a reduction to additional paid-in-capital. We elected to integrate the applicable capped call options with the applicable series of Notes for federal income tax purposes pursuant to applicable U.S. Treasury Regulations. Accordingly, the $19.1 million gross cost of the purchased capped calls in the case of the 2023 Notes and the $87.4 million gross cost of the purchased capped calls in the case of the 2024 & 2026 Notes will be deductible for income tax purposes as original discount interest over the term of the 2023 Notes and the applicable series of the 2024 & 2026 Notes, respectively. We recorded deferred tax assets of $4.6 million with respect to the 2023 Notes and $20.9 million with respect to the 2024 & 2026 Notes, which represent the tax benefit of these deductions with an offsetting entry to additional paid-in capital. In connection with the exchange agreements discussed below, we terminated a corresponding portion of the existing capped call transactions that we entered into in connection with the issuance of the 2023 Notes, which resulted in the net share settlement and our receipt and retirement of 285,466 shares of Class A common stock. Exchange and Conversion of 2023 Notes In connection with the issuance of the 2024 & 2026 Notes discussed above, we entered into exchange agreements with certain holders of our outstanding 2023 Notes and, using a portion of the net proceeds from the issuance of the 2024 & 2026 Notes, we exchanged $145.2 million principal amount, together with accrued and unpaid interest thereon, of the 2023 Notes for aggregate consideration of $145.4 million in cash, representing the principal and accrued interest of the exchanged 2023 Notes, and 2.2 million shares of Class A common stock. The exchange agreements were accounted for as an induced conversion, resulting from the issuance of shares of Class A common stock in excess of the shares that would have been issuable under the terms of the original 2023 Notes. This exchange resulted in a loss on induced conversion and debt extinguishment of $20.5 million, consisting of (i) a $8.2 million market premium representing the excess of the fair value of the total consideration delivered over the fair value of the Class A common stock issuable for the principal amount exchanged pursuant to the original conversion terms and (ii) $12.3 million representing the difference between the fair value and the carrying value, net of unamortized issuance costs, of the liability component of the exchanged 2023 Notes. In the twelve months ended December 31, 2020, we settled $11.0 thousand principal amount of the 2023 Notes upon requests for conversion, which were settled in a combination of cash and shares of our Class A common stock. As of the date of this filing, we have received no additional requests for conversion. The Notes consisted of the following (in thousands): As of December 31, 2020 As of December 31, 2019 2023 Notes 2024 Notes 2026 Notes 2023 Notes 2024 Notes 2026 Notes Liability: Principal $ 84,748 $ 400,000 $ 400,000 $ 84,759 $ 400,000 $ 400,000 Less: debt discount and issuance costs, net of amortization (12,129) (58,148) (84,351) (16,605) (72,669) (97,010) Net carrying amount $ 72,619 $ 341,852 $ 315,649 $ 68,154 $ 327,331 $ 302,990 Equity, net of issuance costs $ 46,473 $ 69,749 $ 93,380 $ 46,474 $ 69,749 $ 93,380 The following table sets forth interest expense recognized related to the Notes (in thousands): Year Ended December 31, 2020 2019 Contractual interest expense $ 6,424 $ 3,186 Amortization of debt issuance costs and discount 31,654 18,625 Total $ 38,078 $ 21,811 The following table sets forth future contractual obligations of contractual interest and principal related to the Notes (in thousands): Payments Due by Period Total Less Than 1 Year 1 to 3 Years 3 to 5 Years More Than 5 Years Notes and related interest $ 917,808 $ 6,424 $ 97,384 $ 410,000 $ 404,000

Accrued Payroll and Payroll-Rel

Accrued Payroll and Payroll-Related Liabilities	12 Months Ended
	Dec. 31, 2020
Payables and Accruals [Abstract]
Accrued Payroll and Payroll-Related Liabilities	10. Accrued Payroll and Payroll-Related Liabilities Accrued payroll and payroll-related liabilities included accrued commissions and bonuses as follows (in thousands): As of December 31, 2020 2019 Accrued commissions $ 11,793 $ 23,037 Accrued bonuses $ 15,046 $ 16,730

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Stockholders' Equity	11. Stockholders’ Equity Dual Class Common Stock Structure In February 2017, we implemented a dual class common stock structure in which each then existing share of common stock converted into a share of Class B common stock and we also authorized a new class of common stock, the Class A common stock. The Class A common stock is entitled to one vote per share and the Class B common stock is entitled to ten votes per share. The Class A common stock and Class B common stock have the same dividend and liquidation rights, and the Class B common stock converts to Class A common stock at any time at the option of the holder, or automatically upon the date that is the earliest of (i) the date specified by a vote of the holders of at least 66 2/3% of the outstanding shares of Class B common stock, (ii) March 29, 2027, and (iii) the date that the total number of shares of Class B common stock outstanding cease to represent at least 10% of the aggregate number of shares of Class A common stock and Class B common stock then outstanding. In addition, each share of Class B common stock will convert automatically into one share of Class A common stock upon any transfer, except for certain permitted transfers described in our restated certificate of incorporation, or the Restated Certificate. Upon the creation of the dual class common stock structure all outstanding options to purchase common stock became options to purchase an equivalent number of shares of Class B common stock, and all RSUs became RSUs for an equivalent number of shares of Class B common stock. Upon the effectiveness of the Restated Certificate in March 2017, the number of shares of capital stock that were authorized to be issued consisted of 500,000,000 shares of Class A common stock, $0.0001 par value per share, 500,000,000 shares of Class B common stock, $0.0001 par value per share, and 10,000,000 shares of undesignated preferred stock, $0.0001 par value per share. Preferred Stock Our board of directors is authorized, subject to limitations prescribed by Delaware law, to issue preferred stock in one or more series, to establish from time to time the number of shares to be included in each series, and to fix the designation, powers, preferences, and rights of the shares of each series and any of its qualifications, limitations, or restrictions, in each case without further vote or action by our stockholders. As of December 31, 2020, no shares of preferred stock were outstanding.

Equity Awards

Equity Awards	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Equity Awards	12. Equity Awards Amended and Restated 2013 Stock Plan We granted options and RSUs under our Amended and Restated 2013 Stock Plan, or 2013 Plan, until March 22, 2017, when the plan was terminated in connection with our IPO. Accordingly, no shares are available for future issuance under the 2013 Plan following the IPO. The 2013 Plan continues to govern outstanding equity awards granted thereunder. 2017 Equity Incentive Plan In February 2017, our board of directors adopted, and our stockholders approved, the 2017 Equity Incentive Plan, or 2017 Plan. The 2017 Plan became effective on March 22, 2017 and is the successor plan to the 2013 Plan. Under the 2017 Plan, we initially reserved (i) 5.1 million shares of Class A common stock for future issuance and (ii) 0.5 million shares of Class A common stock equal to the number of Class B shares reserved but not issued under the 2013 Plan as of the effective date of the 2017 Plan. The number of shares of Class A common stock reserved for issuance under our 2017 Plan will increase automatically on the first day of January of each of 2018 through 2027 by the lesser of (a) 5% of the total outstanding shares of our Class A and Class B common stock as of the immediately preceding December 31 and (b) the number of shares determined by our board of directors. The share reserve may also increase to the extent that outstanding awards under our 2013 Plan expire or terminate. As of December 31, 2020, an aggregate of 11.4 million shares of Class A common stock were reserved for issuance under the 2017 Plan. 2017 Employee Stock Purchase Plan In February 2017, our board of directors adopted, and our stockholders approved, the 2017 Employee Stock Purchase Plan, or 2017 ESPP. The 2017 ESPP became effective on March 23, 2017. Under the 2017 ESPP, we reserved 1.1 million shares of Class A common stock for future issuance. The number of shares of Class A common stock reserved for issuance under our 2017 ESPP will increase automatically on the first day of January of each of 2018 through 2027 by the lesser of (a) 1% of the total outstanding shares of our Class A and Class B common stock as of the immediately preceding December 31 and (b) the number of shares determined by our board of directors. The aggregate number of shares issued over the term of the 2017 ESPP may not exceed 11,000,000 shares of Class A common stock. Under the 2017 ESPP, eligible employees are allowed to purchase shares of our Class A common stock at a discount through payroll deductions of up to 15% of their eligible compensation, subject to plan limitations. Except for the first offering period, which began on the date our Registration Statement on Form S-1 covering the initial public offering of our shares of Class A common stock was declared effective by the SEC, purchase periods are approximately six months in duration starting on the first trading date on or after February 15th and August 15 th of each year. Participants are able to purchase shares of our Class A common stock at 85% of the lower of its fair market value on (i) the first day of the purchase period or on (ii) the purchase date, which is the last day of the purchase period. In 2020, employees purchased 0.1 million shares of Class A common stock at an average price per share of $101.37. As of December 31, 2020, 2.6 million shares of Class A common stock were available for future issuance under the 2017 ESPP. Stock Options Stock options generally vest over a period of three Stock option activity, excluding activity related to the ESPP, during the year ended December 31, 2020 consisted of the following (in thousands, except weighted-average information): Options Weighted- Aggregate Intrinsic Value Weighted-Average Remaining Contractual Term (Years) Options outstanding at December 31, 2019 2,712 $ 22.58 $ 211,488 6.6 Granted 640 139.88 Exercised (1,072) 15.09 $ 118,551 Cancelled/forfeited (209) 47.26 Options outstanding at December 31, 2020 2,071 $ 60.22 $ 138,942 7.0 Exercisable 1,120 $ 17.11 $ 117,230 5.4 Vested and expected to vest at December 31, 2020 2,071 $ 60.22 $ 138,942 7.0 The total intrinsic value of options exercised in the years ended December 31, 2019 and 2018 was $115.4 million and $56.9 million, respectively. The weighted-average exercise price of options granted in the years ended December 31, 2019 and 2018 was $80.88 and $28.26, respectively. As of December 31, 2020, there was $39.5 million of unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted-average period of 2.4 years. Valuation Assumptions The following table presents the weighted-average assumptions used for stock options granted under our 2017 Plan and for shares of our Class A common stock issued under our ESPP for each of the years indicated: Stock Options Employee Stock Purchase Plan 2020 2019 2018 2020 2019 2018 Expected term (in years) 5.8 5.8 6.1 0.5 0.5 0.5 Estimated volatility 48 % 38 % 41 % 78 % 56 % 52 % Risk-free interest rate 1 % 2 % 2 % 1 % 2 % 2 % Estimated dividend yield — — — — — — Weighted average fair value $ 62.37 $ 32.20 $ 12.09 $ 48.07 $ 30.02 $ 12.13 Restricted Stock Units RSUs granted under the 2017 Plan generally vest over a period of three Awards Weighted- Aggregate Intrinsic Value RSUs outstanding at December 31, 2019 1,576 $ 64.46 $ 157,752 Granted 1,224 132.89 Vested (518) 60.22 $ 62,482 Cancelled/forfeited (322) 84.41 RSUs outstanding at December 31, 2020 1,960 $ 105.04 $ 238,764 RSUs expected to vest at December 31, 2020 1,960 $ 105.04 $ 238,764 The total intrinsic value of RSUs vested in the years ended December 31, 2019 and 2018 was $30.2 million and $9.8 million, respectively. The weighted-average grant date fair value of RSUs granted in the years ended December 31, 2019 and 2018 was $90.00 and $35.51, respectively. As of December 31, 2020, total unrecognized compensation expense related to unvested RSUs was approximately $156.6 million, which is expected to be recognized over a weighted-average period of 2.2 years. We classified stock-based compensation expense in the accompanying consolidated statements of operations and comprehensive income (loss) as follows (in thousands): Year Ended December 31, 2020 2019 2018 Cost of revenue $ 2,550 $ 1,634 $ 797 Research and development 18,388 6,954 3,699 Sales and marketing 28,463 12,659 6,153 General and administrative 25,515 11,878 5,998 Total $ 74,916 $ 33,125 $ 16,647

Retirement Plan

Retirement Plan	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Retirement Plan	13. Retirement Plan We established a savings plan that qualifies as a defined contribution plan under Section 401(k) of the Internal Revenue Code of 1986, as amended, or the Code, for the benefit of our employees. Our contributions to the savings plan are discretionary and vest immediately. We contributed approximately $6.2 million, $3.9 million and $2.4 million to the savings plan for the years ended December 31, 2020, 2019, and 2018, respectively.

Leases

Leases	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases	14. Leases We have various non-cancelable operating leases for our corporate offices in California, Colorado, Illinois, Massachusetts, Michigan, New York, and Texas in the United States and Australia, Brazil, Canada, the Czech Republic, France, Germany, Japan, Singapore, Ukraine, the United Arab Emirates and the United Kingdom. These leases expire at various times through 2029. Certain lease agreements contain renewal options, rent abatement, and escalation clauses that are factored into our determination of lease payments when appropriate. The table below presents lease-related assets and liabilities recorded on the consolidated balance sheet (in thousands): As of December 31, Classification 2020 2019 Assets Operating lease right-of-use assets Operating lease right-of-use assets $ 62,508 $ 33,600 Liabilities Operating lease liabilities (current) Accrued expenses and other current liabilities $ 11,471 $ 6,627 Operating lease liabilities (noncurrent) Operating lease liabilities 53,860 29,293 Total lease liabilities $ 65,331 $ 35,920 Lease Costs The following lease costs were included in our consolidated statements of operations and comprehensive income (loss) (in thousands): Year Ended December 31, 2020 2019 Operating lease cost $ 11,150 $ 7,066 Short-term lease cost 1,451 1,604 Variable lease cost 3,993 1,767 Total lease cost $ 16,594 $ 10,437 Supplemental Information The table below presents supplemental balance sheet information related to operating leases: Year Ended December 31, 2020 2019 Weighted-average remaining lease term (in years) 5.7 5.9 Weighted-average discount rate 5.03 % 6.18 % In addition to the leases included on our consolidated balance sheet as of December 31, 2020, we have five leases that have been executed but not yet commenced as of December 31, 2020 with lease terms that range from two In October 2019, we entered into a new operating lease agreement for space located in Irvine, California that will eventually replace our existing corporate headquarters. We currently expect that the new leased facility will be available for occupancy in the second quarter 2021, at which point we will cease the use of our existing corporate headquarters. It is management’s current intent to sublease our existing headquarters. As of December 31, 2020, operating lease liabilities related to our existing corporate headquarters were approximately $12.2 million. Undiscounted Cash Flows The table below reconciles the undiscounted cash flows of the operating leases for each of the first five years, and total of the remaining years, to the operating lease liabilities recorded on the consolidated balance sheet as of December 31, 2020 (in thousands): 2021 $ 14,471 2022 13,911 2023 12,083 2024 11,240 2025 10,551 2026 7,411 Thereafter 6,066 Total minimum lease payments $ 75,733 Less imputed interest (10,402) Present value of future minimum lease payments $ 65,331 Less current obligations under leases (11,471) Long-term lease obligations $ 53,860

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	15. Commitments and Contingencies In the ordinary course of business, we enter into purchase orders with vendors for the purchase of goods and services including non-cancelable agreements for software licenses and royalty agreements. Our minimum purchase obligations as of December 31, 2020 were as follows (in thousands): 2021 $ 40,155 2022 17,964 2023 378 2024 2,033 2025 9 Thereafter — Total minimum payments $ 60,539 Indemnification In the ordinary course of business, we enter into agreements in which we may agree to indemnify other parties with respect to certain matters, including losses resulting from claims of intellectual property infringement, damages to property or persons, business losses, or other liabilities. In addition, we have entered into indemnification agreements with our directors, executive officers, and certain other employees that will require us to indemnify them against liabilities that may arise by reason of their status or service as directors, officers, or employees. The term of these indemnification agreements with our directors, executive officers, and other employees, are generally perpetual after execution of the agreement. The maximum potential amount of future payments we could be required to make under these indemnification provisions is unlimited; however, we maintain insurance that reduces our exposure and enables us to recover a portion of any future amounts paid. As of each of December 31, 2020 and December 31, 2019, we have not accrued a liability for these indemnification provisions because the likelihood of incurring a payment obligation, if any, in connection with these arrangements is not probable or reasonably estimable. Litigation From time to time, we may be involved in lawsuits, claims, investigations, and proceedings, consisting of intellectual property, commercial, employment, and other matters, which arise in the ordinary course of business. Other than the matters described below, we are not currently party to any material legal proceedings or claims, nor are we aware of any pending or threatened legal proceedings or claims that could have a material adverse effect on our business, operating results, cash flows, or financial condition should such legal proceedings or claims be resolved unfavorably. As of the date of this filing, three putative securities class action lawsuits have been filed against us and certain of our executive officers in U.S. federal court relating to alleged violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, or the Exchange Act, and Rule 10b-5 promulgated thereunder: (1) Smith v. Alteryx, Inc. , Case No. 8:20-cv-01540 (CD Cal.), filed on August 19, 2020; (2) Chau v. Alteryx, Inc. , Case No. 8:20-cv-01886 (CD Cal.), filed on September 30, 2020; and (3) Lalgudi v. Alteryx, Inc. , Case No. 8:20-cv-01910 (CD Cal.), filed on October 2, 2020. On November 13, 2020, lead plaintiffs were appointed, or the Lead Plaintiffs, and the three cases were consolidated into one action, In re Alteryx, Inc. Securities Litigation , Case No. 8:20-cv-01540 (C.D. Cal). On January 28, 2021, a first amended complaint was filed asserting claims on behalf of persons and entities that purchased or otherwise acquired our securities between February 13, 2020 and August 7, 2020. Lead Plaintiffs allege that such persons and entities were harmed as a result of certain alleged false or misleading statements, or omissions, made by us and certain of our executive officers. These proceedings remain in the early stages. We intend to vigorously defend against these claims. Because of the early stages of these matters, we are unable to estimate a reasonably possible range of loss, if any, that may result from these matters. Warranty We provide an assurance-type warranty to customers that our platform will operate substantially in accordance with its specifications. Historically, no significant costs have been incurred related to product warranties and none are expected in the future and, as such, no accruals for product warranty costs have been made.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	16. Income Taxes The components of income (loss) before benefit of income taxes were as follows (in thousands): Year Ended December 31, 2020 2019 2018 Domestic $ (32,569) $ 9,259 $ 27,849 Foreign 4,924 (3,195) (2,415) Total $ (27,645) $ 6,064 $ 25,434 The components of the benefit of income taxes were as follows (in thousands): Year Ended December 31, 2020 2019 2018 Current: Federal $ — $ (375) $ (14) State 248 158 314 Foreign 327 1,176 587 Total current income tax expense $ 575 $ 959 $ 887 Deferred: Federal $ (2,617) $ (18,684) $ (2,321) State (958) (3,406) (869) Foreign (271) 52 (283) Total deferred income tax benefit: $ (3,846) $ (22,038) $ (3,473) Total $ (3,271) $ (21,079) $ (2,586) The following table reconciles our benefit of income taxes at the statutory rate to that at the effective tax rate, using a U.S. federal statutory tax rate of 21% for each of 2020, 2019, and 2018 (in thousands): Year Ended December 31, 2020 2019 2018 Income tax at federal statutory rate $ (5,806) $ 1,273 $ 5,341 Increase/(decrease) in tax resulting from: State income tax expense, net of federal (3,105) (2,567) (438) Foreign rate differential 47 789 853 Stock-based compensation (16,852) (20,913) (7,916) Change in valuation allowance 24,363 18,129 510 Meals and entertainment 764 658 310 Research credits (4,677) (3,177) (1,563) Tax basis step-up due to internal reorganization — (15,321) — Other 1,995 50 317 Total benefit of income taxes $ (3,271) $ (21,079) $ (2,586) The following table shows the significant components of deferred income tax assets (liabilities) (in thousands): As of December 31, 2020 2019 Deferred tax assets: Deferred revenue $ 923 $ 739 Net operating losses 20,147 10,997 Accruals and reserves 5,513 5,679 Research & other credits 17,770 11,027 Intangibles 10,570 12,291 Operating lease liabilities 14,475 7,586 Effect of Section 163(j) on interest expense 6,696 4,046 Stock-based compensation 14,376 6,623 Other — 353 Total deferred tax assets 90,470 59,341 Less valuation allowance (44,046) (19,683) Net deferred tax assets 46,424 39,658 Deferred tax liabilities: Operating lease right-of-use assets (13,831) (7,002) Deferred commissions (10,213) (8,924) Convertible senior notes (16,990) (20,459) Effects of ASC 606 adoption (4,343) (8,819) Other (776) (48) Total deferred tax liabilities (46,153) (45,252) Net deferred tax assets (liabilities) $ 271 $ (5,594) We record a valuation allowance against our deferred tax assets if and to the extent it is more likely than not that we will not recover our deferred tax assets. In evaluating the need for a valuation allowance, we weight all relevant positive and negative evidence, including among other factors, historical financial performance, forecasts of income over the applicable carryforward periods, and our market environment, with each piece weighted based on its reliability. As of December 31, 2020, we had insufficient objective positive evidence that we will generate sufficient future pre-tax income to overcome the negative evidence of cumulative losses. Accordingly, we recorded a full valuation allowance against our U.S. and U.K. deferred tax assets as of December 31, 2020. We had a deferred tax liability of $5.6 million as of December 31, 2019, included in other liabilities in our consolidated balance sheets. The following table shows the changes in our valuation allowance (in thousands): Year Ended December 31, 2020 2019 2018 Beginning balance $ 19,683 $ 1,138 $ 7,304 Decrease in valuation allowance due to adoption of ASC 606 — — (6,676) Increase in valuation allowance due to internal reorganization — 15,321 — Other increase in valuation allowance 24,363 3,224 510 Ending balance $ 44,046 $ 19,683 $ 1,138 In 2019, through an internal reorganization, our U.K. subsidiary acquired foreign exploitation rights to intellectual property from two other of our subsidiaries. The U.K. subsidiary acquired the rights for their fair market value and that amount became the U.K. tax basis in such rights, which exceeds their carrying amount under U.S. GAAP. Accordingly, we recorded a deferred tax asset for the excess of U.K. tax basis over the U.S. GAAP carrying amount. Based on cumulative U.K. losses, we have concluded it was more likely than not that we would not realize our U.K. deferred tax asset, and accordingly, we have recorded a full valuation allowance against it. As of December 31, 2020, we had U.S. federal and state income tax net operating loss carryforwards of approximately $73.0 million and $42.7 million, respectively. The U.S. federal and state net operating losses will begin to expire in 2035 and 2024, respectively, unless previously utilized. Under Sections 382 and 383 of the Code, annual use of our net operating loss carryforwards and tax credits may be limited if a cumulative change in ownership of more than 50% occurs within a three-year period. We determined that ownership changes occurred in 2015 and 2019, which limit the future annual use of our net operating loss carryforwards and tax credits, but neither of which permanently disallows any of those tax attributes. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act, or the CARES Act, was signed into law. The CARES Act includes tax provisions applicable to businesses, such as net operating losses, enhanced interest deductibility, optional deferral of deposits of payroll taxes and a refundable employee retention payroll tax credit. We have concluded the analysis of these provisions as of year-end and the CARES Act did not have a material impact on our income taxes for 2020. We have not accrued U.S. state income taxes or foreign withholding taxes on the earnings of our foreign subsidiaries, as these amounts are intended to be indefinitely reinvested in operations outside the United States. As of December 31, 2020, there were immaterial cumulative amounts of undistributed earnings at our foreign subsidiaries. We are subject to taxation in the United States and various states and international jurisdictions. Our U.S. federal tax returns are open for examination for tax years 2017 and forward, and our state tax returns are open for examination for tax years 2014 and forward. Our tax returns for international jurisdictions are open for examination for tax years 2016 and forward. However, net operating loss and other tax attribute carryforwards utilized in subsequent years continue to be subject to examination by the tax authorities until the year to which the net operating loss and/or other tax attributes are carried forward is no longer subject to examination. Neither we nor any of our subsidiaries are currently under examination from tax authorities in the jurisdictions in which we do business. At December 31, 2020, we had approximately $8.5 million of unrecognized tax benefits. If fully recognized, $5.3 million of the unrecognized tax benefits would reduce our net operating losses. In the next 12 months, we do not expect our unrecognized tax benefits to decrease. Accrued interest related to our uncertain tax positions was not material at December 31, 2020. The following table shows the activity in gross unrecognized tax benefits (in thousands): Year Ended December 31, 2020 2019 2018 Balance at beginning of year $ 7,556 $ 6,234 $ 5,794 Additions based on tax position related to the current year 652 1,322 391 Additions for tax positions of prior years 312 — 49 Balance at end of year $ 8,520 $ 7,556 $ 6,234

Basic and Diluted Net Income (L

Basic and Diluted Net Income (Loss) Per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Basic and Diluted Net Income (Loss) Per Share	17. Basic and Diluted Net Income (Loss) Per Share The following table presents the computation of net income (loss) per share (in thousands except per share data): Year Ended December 31, 2020 2019 2018 Numerator: Net income (loss) attributable to common stockholders $ (24,374) $ 27,143 $ 28,020 Denominator: Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, basic 66,058 63,424 60,829 Effect of dilutive securities: Convertible senior notes — 1,975 409 Employee stock awards — 3,259 3,506 Contingently issuable shares — 3 — Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, diluted 66,058 68,661 64,744 Net income (loss) per share attributable to common stockholders, basic $ (0.37) $ 0.43 $ 0.46 Net income (loss) per share attributable to common stockholders, diluted $ (0.37) $ 0.40 $ 0.43 The following weighted-average equivalent shares of common stock, excluding the impact of the treasury stock method, were excluded from the diluted net income (loss) per share calculation because their inclusion would have been anti-dilutive (in thousands): Year Ended December 31, 2020 2019 2018 Stock awards 4,053 209 510 Convertible senior notes 6,137 1,644 — Total shares excluded from net income (loss) per share 10,190 1,853 510

Segment and Geographic Informat

Segment and Geographic Information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Segment and Geographic Information	18. Segment and Geographic Information Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker, or CODM, who is our chief executive officer, in deciding how to allocate resources and assess our financial and operational performance. Our CODM evaluates our financial information and resources and assesses the performance of these resources on a consolidated and aggregated basis. As a result, we have determined that our business operates in a single operating segment. Long-lived assets classified by geographic location, and, with respect to the year ended December 31, 2019, with countries over 10% of this total, were as follows (in thousands): As of December 31, Long-lived assets: 2020 2019 United States $ 84,055 $ 39,641 United Kingdom 6,236 7,263 Other countries 12,862 6,992 Total $ 103,153 $ 53,896

Selected Quarterly Financial Da

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	19. Selected Quarterly Financial Data (Unaudited) The following table sets forth unaudited quarterly financial information for the years ended December 31, 2020 and 2019. We have prepared the unaudited quarterly consolidated statements of operations data on a basis consistent with the audited annual consolidated financial statements. In the opinion of management, the financial information in this table reflects all adjustments, consisting of normal and recurring adjustments, necessary for the fair statement of this data (in thousands except per share data): 2020 Quarter Ended March 31 June 30 September 30 December 31 Revenue $ 108,831 $ 96,233 $ 129,717 $ 160,527 Gross profit $ 95,784 $ 86,598 $ 119,303 $ 149,784 Income (loss) from operations $ (20,105) $ (17,794) $ 9,633 $ 24,359 Net income (loss) $ (15,473) $ (35,293) $ 4,357 $ 22,035 Diluted income (loss) per share $ (0.24) $ (0.53) $ 0.06 $ 0.32 2019 Quarter Ended March 31 June 30 September 30 December 31 Revenue $ 76,020 $ 82,043 $ 103,397 $ 156,450 Gross profit $ 68,020 $ 72,748 $ 93,752 $ 144,239 Income (loss) from operations $ (4,402) $ (8,288) $ 11,936 $ 38,735 Net income (loss) $ 5,914 $ (3,219) $ (6,240) $ 30,688 Diluted income (loss) per share $ 0.09 $ (0.05) $ (0.10) $ 0.44

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Principles of Consolidation and Basis of Presentation	Our consolidated financial statements are presented in accordance with accounting standards generally accepted in the United States of America, or U.S. GAAP, and include the accounts of Alteryx, Inc. and its wholly owned subsidiaries after elimination of intercompany transactions and balances.
Use of Estimates	The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities at the date of the consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates and assumptions. On an ongoing basis, our management evaluates estimates and assumptions, including those related to determination of standalone selling prices of our products and services, income tax valuations, stock-based compensation, and goodwill and intangible assets valuations and recoverability. We base our estimates on historical data and experience, as well as various other factors that our management believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities.
Concentration of Risk	Financial instruments, which subject us to concentrations of credit risk, consist primarily of cash and cash equivalents, investments, and trade accounts receivable. We maintain our cash and cash equivalents and investments with three major financial institutions and a portion of such balances exceed or are not subject to Federal Deposit Insurance Corporation, or FDIC, insurance limits. We extend differing levels of credit to customers, do not require collateral deposits, and, when necessary, maintain reserves for potential credit losses based upon the expected collectability of accounts receivable. We manage credit risk related to our customers by following credit approval processes, establishing credit limits, performing periodic evaluations of credit worthiness and applying other credit risk monitoring procedures. Accounts receivable include amounts due from customers with principal operations primarily in the United States. As of December 31, 2019, one of our distributors accounted for 10.6% of our total accounts receivable balance. No other customers accounted for 10% or more of our accounts receivable balance or 10% or more of our revenue in any years presented.
Fair Value of Financial Instruments	We utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. We determine fair value based on assumptions that market participants would use in pricing an asset or liability in the principal or most advantageous market. When considering market participant assumptions in fair value measurements, the following fair value hierarchy distinguishes between observable and unobservable inputs, which are categorized in one of the following levels: Level 1 Unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date. Level 2 Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active near the measurement date; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The fair value of our money market funds was determined based on “Level 1” inputs. The fair values of our certificates of deposit, commercial paper, U.S. Treasury and agency bonds, and corporate bonds were determined based on “Level 2” inputs. The valuation techniques used to measure the fair values of certificates of deposit and commercial paper included observable market-based inputs for similar assets, which primarily include yield curves and time-to-maturity factors. The valuation techniques used to measure the fair values of U.S. Treasury and agency bonds and corporate bonds included standard observable inputs, including reported trades, quoted market prices, matrix pricing, benchmark yields, broker/dealer quotes, issuer spreads, two-sided markets or benchmark securities and data provided by third parties as many of the bonds are not actively traded.
Cash and Cash Equivalents and Restricted Cash	We consider cash and cash equivalents to include short-term, highly liquid investments that are readily convertible to known amounts of cash and so near their maturity that they present an insignificant risk of changes in the value, including investments that mature within three months from the date of original purchase. Amounts receivable from a credit card processor of approximately $2.2 million and $0.6 million as of December 31, 2020 and 2019, respectively, are considered cash equivalents because they were both short-term and highly liquid in nature and are typically converted to cash within three days of the sales transaction.
Investments in Marketable Securities	Our investments consist of available-for-sale marketable securities, which are composed of fixed income securities, certificates of deposit, and money market funds. Our fixed income securities are predominantly high-grade corporate bonds, U.S. Treasury bonds, and U.S. Agency bonds. The classification of investments is determined at the time of purchase and reevaluated at each balance sheet date. Investments are stated at fair value and are classified as current or non-current based on the nature of the securities as well as their stated maturities. Unrealized gains and losses that are not associated with a credit loss are recognized in other comprehensive income in our consolidated balance sheets. At each balance sheet date, we assess available-for-sale securities in an unrealized loss position to assess whether a decline in the fair value below the amortized cost basis (i.e., impairment) of an available-for-sale debt security is due to credit-related factors or noncredit-related factors. If it is determined that the unrealized losses are credit-related, we record the credit-related impairment as an allowance on the balance sheet with a corresponding adjustment in our consolidated statement of operations and comprehensive income (loss). Credit losses are limited to the amount by which the security’s amortized cost basis exceeds its fair value and both the allowance and the adjustment to net income can be reversed if conditions change. If the unrealized loss is determined not to be credit-related, the corresponding adjustment is made in accumulated other comprehensive income (loss) in our consolidated balance sheets.
Accounts Receivable, Allowance for Doubtful Accounts, and Sales Reserves	Our accounts receivable consists of amounts due from customers and are typically unsecured. Accounts receivable are recorded at the invoiced amount and are non-interest bearing. The allowance for doubtful accounts is estimated and established by assessing individual accounts receivable over a specific age and dollar value, pooling all other receivables by similar risk characteristics, considering historical loss rates, adjusted for asset-specific characteristics, current conditions, or forecasts, and applying a loss rate to the amortized cost of the asset. Additions to the allowance are charged to general and administrative expenses or revenue in the consolidated statements of operations and comprehensive income (loss), or against deferred revenue in the consolidated balance sheets depending on the timing of the addition in relation to the contract term. Accounts receivable are written off against the allowance when an account balance is deemed uncollectible. We estimate a sales reserve based upon the historical adjustments made to customer billings. Such reserve is recorded as a reduction of revenue and deferred revenue in the consolidated statements of operations and comprehensive income (loss) and balance sheets, respectively.
Assets Recognized from the Costs to Obtain a Contract with Customer, Royalties, Revenue Recognition, Contract Assets and Contract Liabilities, Cost of Revenue	We record an asset for the incremental costs of obtaining a contract with a customer, which primarily consists of sales commissions and partner referral fees that are earned upon execution of contracts. We pay commissions for new product sales as well as for renewals of existing contracts, and partner referral fees only for new product sales. For customer contracts in which the commissions paid on new business and renewals are commensurate, we generally amortize these costs over the contractual term of the contract, consistent with the pattern of revenue recognition for each performance obligation. For customer contracts in which the commissions paid on new business and renewals are not commensurate and for partner referral fees, we amortize the costs on new business over an expected period of benefit, which we have determined to be approximately four years. The expected period of benefit was determined by taking into consideration our customer contracts, the duration of our relationships with our customers and the useful life of our technology. In capitalizing and amortizing deferred commissions and partner referral fees, we have elected to apply a portfolio approach. We include amortization of this asset in sales and marketing expense in our consolidated statements of operations and comprehensive income (loss).We pay royalties associated with licensed third-party syndicated data sold with our platform and we recognize royalty expense to cost of revenue in our consolidated statements of operations and comprehensive income (loss) when incurred. Our revenue is derived from the licensing of subscription-based software, data subscription services, and professional services, including training and consulting services. The subscription-based license generally includes access to hosted services and software and post-contract support, or PCS, which provides the customer the right to receive when-and-if-available unspecified future updates, upgrades and enhancements, and technical product support. The core principle of ASC 606, Revenue from Contracts with Customers , or ASC 606, is to recognize revenue upon the transfer of goods or services to our customers in an amount that reflects the consideration to which we expect to be entitled. In order to adhere to this core principle, we apply the following five-step approach: • identify the contract with a customer; • identify the performance obligations in the contract; • determine the transaction price; • allocate the transaction price to the performance obligations in the contract; and • recognize revenue when (or as) we satisfy a performance obligation. We only apply the five-step model to contracts when it is probable that we will collect the consideration we are entitled to in exchange for goods or services we transfer to the customer. Revenue is measured based on consideration specified in a contract with a customer, and excludes any taxes we collect concurrent with revenue-producing activities. Most of our contracts contain a fixed transaction price. Our subscription agreements typically range from one to three years and are billed annually in advance with net payment terms of 60 days or less. The primary purpose of our payment and invoicing terms is to provide customers with predictable ways to purchase our software and services, and not to provide customers with financing. Our contracts with customers typically contain multiple performance obligations. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. All of our licenses are sold as subscription-based, on-premise, licenses and are bundled with maintenance and support, or PCS, and cloud-based offerings. In addition to our on-premise licenses, we sell subscriptions to third-party syndicated data and provide professional service offerings primarily related to trainings for our customers. We allocate the transaction price of the contract to each performance obligation using the relative standalone selling price, or SSP, of each distinct good or service in the contract. We determine estimates of SSP based on sales of goods and services sold on a standalone basis, our overall pricing strategies, market conditions, including the geographic locations in which the products are sold, the useful life of our products, and market data. We review the SSP for each of our performance obligations at least every financial reporting period and update it when appropriate to ensure that the practices employed reflect our recent pricing experience and maximize the use of observable data. We recognize revenue when we satisfy a performance obligation by transferring control of a good or service to a customer. Revenue related to our subscription-based licenses is recognized at a point in time when the platform is first made available to the customer, or the beginning of the subscription term, if later. Revenue related to PCS, cloud-based offerings, and data subscriptions is recognized ratably over the subscription terms. Professional services revenue is recognized when the services are provided to the customer, or when they expire. Contract Assets and Contract Liabilities Timing may differ between the satisfaction of performance obligations and the invoicing and collection of amounts related to our contracts with customers. Contract assets primarily relate to unbilled amounts for contracts with customers for which the amount of revenue recognized exceeds the amount billed to the customer. Contract assets are transferred to accounts receivable when the right to invoice becomes unconditional. Contract assets are recorded as current if the invoice will be delivered to the customer within the succeeding 12-month period with the remaining recorded as long-term. Current contract assets are included in prepaid expenses and other current assets and long-term contract assets are included in other assets on our consolidated balance sheets. Contract liabilities, or deferred revenue, are recorded for amounts that are collected in advance of the satisfaction of performance obligations. These liabilities are classified as current if the performance obligation will be satisfied during the succeeding 12-month period and the remaining portion is recorded as non-current deferred revenue in our consolidated balance sheet. Cost of Revenue Cost of revenue is accounted for in accordance with ASC 705, Cost of Sales and Services , and consists of employee-related costs, including salaries and bonuses, stock-based compensation expense, and employee benefit costs associated with our customer support and professional services organizations, expenses related to hosting and operating our cloud infrastructure in a third-party data center, licenses of third-party syndicated data, amortization and impairment of acquired completed technology intangible assets, and related overhead expenses. Out-of-pocket travel costs related to the delivery of professional services are typically reimbursed by the customers and are accounted for as both revenue and cost of revenue in the period in which the cost is incurred.
Property and Equipment	Property and equipment are stated at historical cost, less accumulated depreciation and amortization. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized on a straight-line basis over the shorter of their estimated useful lives or lease terms. Useful lives by asset category are as follows: Computer equipment 3 years Furniture and fixtures 3 to 7 years Leasehold improvement Shorter of useful life or lease term
Intangible Assets	Intangible assets consist primarily of acquired developed technology. We determine the appropriate useful life of our intangible assets by performing an analysis of expected cash flows of the acquired assets. Intangible assets are amortized over their estimated useful lives of two
Impairment of Long-Lived Assets	We review our long-lived assets for impairment whenever events or changes in circumstances indicate the carrying amount of such assets may not be fully recoverable. Recoverability of these assets is determined by comparing the forecasted undiscounted cash flows attributable to such assets to their carrying value. If the carrying value of the assets exceeds the forecasted undiscounted cash flows, then the assets are written down to their fair value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the assets.
Business Combinations	The results of businesses acquired in a business combination are included in our consolidated financial statements from the date of the acquisition. We allocate the purchase price, including the fair value of any non-cash and contingent consideration, to the identifiable assets and liabilities of the relevant acquired business at their acquisition date fair values. Any excess consideration over the fair value of assets acquired and liabilities assumed is recognized as goodwill. Contingent consideration payable in cash or a fixed dollar amount settleable in a variable number of shares is classified as a liability and recorded at fair value, with changes in fair value recorded in general and administrative expenses each period. Transaction costs associated with business combinations are expensed as incurred, and are included in general and administrative expense in the consolidated statements of operations and comprehensive income (loss). We perform valuations of assets acquired, liabilities assumed, and contingent consideration and allocate the purchase price to its respective assets and liabilities. Determining the fair value of assets acquired, liabilities assumed, and contingent consideration requires us to use significant judgment and estimates, including the selection of valuation methodologies, estimates of future revenue, costs and cash flows, discount rates, the probability of achievement of specified milestones, and selection of comparable companies. We engage the assistance of valuation specialists in concluding on fair value measurements in connection with determining fair values of assets acquired, liabilities assumed, and contingent consideration in a business combination.
Goodwill	Goodwill represents the excess of the purchase price over the fair value of net assets acquired in a business combination. We test goodwill for impairment in accordance with the provisions of ASC 350, Intangibles – Goodwill and Other, or ASC 350. Goodwill is tested for impairment at least annually at the reporting unit level or whenever events or changes in circumstances indicate that goodwill might be impaired. Events or changes in circumstances which could trigger an impairment review include a significant adverse change in legal factors or in the business climate, unanticipated competition, loss of key personnel, significant changes in the use of the acquired assets or our strategy, significant negative industry or economic trends, or significant underperformance relative to expected historical or projected future results of operations. ASC 350 provides that an entity has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then additional impairment testing is not required. However, if an entity concludes otherwise, then it is required to perform an impairment test. The impairment test involves comparing the estimated fair value of a reporting unit with its book value, including goodwill. If the estimated fair value exceeds book value, goodwill is considered not to be impaired. If, however, the fair value of the reporting unit is less than book value, then an impairment loss is recognized in an amount equal to the amount that the book value of the reporting unit exceeds its fair value, not to exceed the total amount of goodwill allocated to the reporting unit.
Research and Development	Research and development expense consists primarily of employee-related costs, including salaries and bonuses, stock-based compensation expense, and employee benefits costs, depreciation of equipment used in research and development for our research and development employees, third-party contractor costs, and related allocated overhead costs. Product development expenses, other than software development costs qualifying for capitalization, are expensed as incurred.
Software Development Costs	Costs incurred in the development of new software products and enhancements to existing software products to be accounted for under software revenue recognition guidance are accounted for in accordance with ASC 985-20, Costs of Software to be Sold, Leased, or Marketed, We account for costs to develop or obtain internal-use software and implementation costs incurred in hosting arrangements in accordance with ASC 350-40, Internal-Use Software,
Convertible Senior Notes	Our Notes (as defined in Note 9, Convertible Senior Notes , of these notes to our consolidated financial statements) are accounted for in accordance with ASC 470‑20, Debt with Conversion and Other Options , or ASC 470-20. Pursuant to ASC 470‑20, issuers of certain convertible debt instruments that have a net settlement feature and may be settled wholly or partially in cash upon conversion are required to separately account for the liability (debt) and equity (conversion option) components of the instrument. The carrying amount of the debt component for each series of our Notes was calculated by estimating the fair value of similar liabilities that do not have associated convertible features. The carrying amount of the equity component for each series of our Notes was determined by deducting the fair value of the debt component from their respective principal amounts. The difference between the principal amount of each series of our Notes and its respective fair value of debt component are amortized to interest expense over its respective terms using the effective interest method. The equity component, net of issuance costs and deferred tax effects, of each series of our Notes is presented within additional paid-in-capital in our consolidated balance sheet, and will not be remeasured as long as it continues to meet the requirements for equity classification. In accounting for the issuance costs related to our Notes, the allocation of issuance costs incurred between the debt and equity components was based on their relative values.
Leases	Through December 31, 2018, we recognized rent expense related to operating leases on a straight-line basis over the lease term and, accordingly, recorded the difference between rent payments and rent expense as a deferred rent liability. Effective January 1, 2019, we adopted ASU 2016-02, Leases , or ASC 842. Under ASC 842, we determine if an arrangement is a lease at contract inception. Operating leases are included in operating lease right-of-use assets, accrued expenses and other current liabilities and operating lease liabilities in our consolidated balance sheets. Operating lease charges are recorded in cost of revenue and operating expenses in our consolidated statements of operations and comprehensive income (loss). Operating lease right-of-use assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. We do not separate lease and non-lease components for all underlying asset classes. As most of our leases do not provide a readily determinable implicit rate, we estimate our incremental borrowing rate to discount the lease payments based on information available at lease commencement. We determine our incremental borrowing rate for each lease based primarily on the lease term and the economic environment of the applicable country or region. The operating lease right-of-use asset also includes any lease payments made and excludes lease incentives. The lease term includes options to extend or terminate when we are reasonably certain the option will be exercised. In general, we are not reasonably certain to exercise such options. We recognize lease expense for minimum lease payments on a straight-line basis over the lease term, while variable lease payments, such as common area maintenance, are recognized as incurred. We elected the practical expedient to not recognize operating lease right-of-use assets and operating lease liabilities that arise from short-term leases (i.e., leases with a term of 12 months or less).
Advertising Costs	Advertising costs are expensed as incurred. We incurred advertising costs of approximately $16.3 million, $17.8 million, and $9.1 million for the years ended December 31, 2020, 2019, and 2018, respectively. Such costs primarily relate to our annual user conferences, online and print advertising as well as sponsorship of public marketing events, and are reflected in sales and marketing expense in our consolidated statements of operations and comprehensive income (loss).
Stock-Based Compensation	We recognize stock-based compensation expense in accordance with the provisions of ASC 718, Compensation—Stock Compensation, or ASC 718. ASC 718 requires the measurement and recognition of compensation expense for all stock-based payment awards made to employees and directors based on the grant date fair values of the awards. We use the Black-Scholes option-pricing method for valuing stock options and shares granted under the employee stock purchase plan. Restricted stock units, or RSUs, are valued based on the fair value of our common stock on the date of grant, less our expected dividend yield. For awards that vest solely based on continued service, the fair value of an award is recognized as an expense over the requisite service period on a straight-line basis. For awards that contain performance conditions, the fair value of an award is recognized based on the probability of the performance condition being met using the graded vesting method. Stock-based compensation expense is included in cost of revenue and operating expenses within our consolidated statements of operations and comprehensive income (loss) based on the classification of the individual earning the award. The determination of the grant date fair value of stock-based awards is affected by the estimated fair value per share of our common stock as well as other highly subjective assumptions, including, but not limited to, the expected term of the stock-based awards, expected stock price volatility, risk-free interest rates, and expected dividends yields, which are estimated as follows: • Expected term . We determine the expected term of the awards using the simplified method, which estimates the expected term based on the average of the vesting period and contractual term of the stock option. • Expected volatility . We estimate the expected volatility based on our own historical volatility as well as the volatility of similar publicly held entities (referred to as “guideline companies”) over a period equivalent to the expected term of the awards. In evaluating the similarity of guideline companies to us, we considered factors such as industry, stage of life cycle, size, and financial leverage. We intend to continue to consistently apply this process using the same or similar guideline companies to estimate the expected volatility until sufficient historical information regarding the volatility of the share price of our common stock becomes available. • Risk-free interest rate . The risk-free interest rate used to value our stock-based awards is based on the U.S. Treasury yield in effect at the time of grant for a period consistent with the expected term of the award. • Estimated dividend yield . The expected dividend is assumed to be zero as we have never declared or paid any cash dividends and do not currently intend to declare dividends in the foreseeable future. The assumptions used in calculating the fair value of stock-based awards represent our best estimates, but these estimates involve inherent uncertainties and the application of judgment. As a result, if factors change or we use different assumptions, stock-based compensation expense could be materially different in the future.
Foreign Currency Remeasurement and Transactions	The functional currency of our wholly owned subsidiaries is the currency of the primary economic environment in which the entity operates. Assets and liabilities denominated in currencies other than the functional currency are remeasured using the current exchange rate for monetary accounts and historical exchange rates for nonmonetary accounts, with exchange differences on remeasurement included in other income (expense), net in our consolidated statements of operations and comprehensive income (loss). Our foreign subsidiaries that utilize foreign currency as their functional currency translate such currency into U.S. dollars using (i) the exchange rate on the balance sheet dates for assets and liabilities, (ii) the average exchange rates prevailing during the period for revenues and expenses, and (iii) historical exchange rates for equity. Any translation adjustments resulting from this process are shown separately as a component of accumulated other comprehensive income (loss) within stockholder’s equity in the consolidated balance sheets.Transactions denominated in currencies other than the U.S. dollar may result in transaction gains or losses at the end of the period and when the related receivable or payable is settled. G
Income Taxes	We apply the provisions of ASC 740, Income Taxes, or ASC 740. Under ASC 740, we account for our income taxes using the asset and liability method whereby deferred tax assets and liabilities are determined based on temporary differences between the bases used for financial reporting and income tax reporting purposes. Deferred income taxes are provided based on the enacted tax rates and laws that will be in effect at the time such temporary differences are expected to reverse. A valuation allowance is provided for deferred tax assets if it is more likely than not that we will not realize those tax assets through future operations. We also utilize the guidance in ASC 740 to account for uncertain tax positions. ASC 740 contains a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount which is more likely than not to be realized and effectively settled. We consider many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately reflect actual outcomes. We recognize interest and penalties on unrecognized tax benefits as a component of benefit of income taxes in our consolidated statements of operations and comprehensive income (loss).
Net Income (Loss) Per Share Attributable to Common Stockholders	In periods in which we have net income, and a contingent event has been met, we apply the two-class method for calculating earnings per share. Under the two-class method, net income is attributed to common stockholders and participating securities based on their participation rights. Participating securities include our Notes. In periods in which we have net losses, we do not attribute losses to participating securities as they are not contractually obligated to share our losses. Under the two-class method, basic net income (loss) per share attributable to common stockholders is computed by dividing the net income (loss) attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Net income (loss) attributable to common stockholders is calculated as net income (loss) including current period convertible preferred stock accretion. Diluted earnings per share attributable to common stockholders adjusts basic earnings per share for the potentially dilutive impact of stock options, restricted stock units and convertible notes as computed under the treasury stock method. In periods in which we incurred a net loss, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share.
Recent Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements	In June 2016, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, 2016-13, Financial Instruments - Credit Losses , or ASC 326. The new standard amends the impairment model to utilize an expected loss methodology in place of the currently used incurred loss methodology. As a result, we are now required to use a forward-looking expected credit loss model for accounts receivables and other commitments to extend credit. Through December 31, 2019, we calculated our allowance for credit losses using a single pool of trade receivables as the basis for our credit loss rate. Effective January 1, 2020, we adopted ASC 326 and made changes to our accounting policies related to credit loss calculations, including the consideration of forecasted economic data and the pooling of financial assets with similar risk profiles, and now recognize credit losses associated with our available-for-sale securities. We adopted the new allowance for credit losses accounting standard on January 1, 2020 by means of a cumulative-effect adjustment, where we recognized the cumulative effect of initially applying the guidance as a $0.6 million addition to our contract asset reserve with an offsetting adjustment to retained earnings. As of January 1, 2020, we did not have an allowance for credit losses related to our available-for-sale securities. See Note 5, Fair Value Measurements, and Note 6, Allowance for Doubtful Accounts and Sales Reserves , for additional details. In August 2018, the FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract , which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing costs incurred to develop or obtain internal-use software. We adopted this standard prospectively effective January 1, 2020. As a result of the adoption, we are required to capitalize additional costs related to the implementation of cloud computing arrangements that we have historically expensed as incurred, particularly costs incurred during the application development phase. This policy aligns the accounting for implementation costs associated with cloud computing arrangements with our existing policy related to internal-use software. Capitalized costs related to cloud computing arrangements for the twelve months ended December 31, 2020 which are included in prepaid expenses and other current assets on our consolidated balance sheets, were not material. Recently Issued Accounting Pronouncements In August 2020, the FASB issued ASU 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 , or ASU 2020-06, which simplifies the accounting for convertible instruments by removing certain separation models required under current U.S. GAAP, including the beneficial conversion feature and cash conversion models. ASU 2020-06 removes certain settlement conditions that are required for equity contracts to qualify for the derivative scope exception and it also simplifies the diluted earnings per share calculation in certain areas. This guidance will be effective for us for annual reporting periods beginning after December 15, 2021 and for interim periods within those annual periods, and can be applied utilizing either a modified or full retrospective transition method. Early adoption is permitted. We currently account for our Notes, as described in Note 9 , Convertible Senior Notes , utilizing the cash conversion model. We do not expect to early adopt the guidance and are currently evaluating the full impact the guidance will have on our financial statements, but we currently expect that the adoption will have a material impact on our consolidated financial statements and related disclosures. In October 2020, the FASB issued ASU 2020-10, Codification Improvements, which updates various codification topics by clarifying disclosure requirements to align with the SEC's regulations. We will adopt ASU 2020-10 as of the reporting period beginning January 1, 2021. Adoption of this update is not expected to have a material effect on our consolidated financial statements and related disclosures.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Schedule of Useful Lives of Assets	Useful lives by asset category are as follows: Computer equipment 3 years Furniture and fixtures 3 to 7 years Leasehold improvement Shorter of useful life or lease term Property and equipment, net consisted of the following (in thousands): Year Ended December 31, 2020 2019 Computer equipment & software $ 14,627 $ 10,521 Furniture and fixtures 9,941 4,972 Leasehold improvements 22,006 10,438 Construction in process 8,618 3,771 $ 55,192 $ 29,702 Less: Accumulated depreciation and amortization (14,547) (9,406) Total property and equipment, net $ 40,645 $ 20,296

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The disaggregation of revenue by region was as follows (in thousands): Year Ended December 31, Revenue by region: 2020 2019 2018 United States $ 338,190 $ 296,108 $ 178,774 International 157,118 121,802 74,796 Total $ 495,308 $ 417,910 $ 253,570
Contract Assets and Contract Liabilities	A summary of the activity impacting our deferred commissions during the years ended December 31, 2020 and 2019 are presented below (in thousands): Year Ended December 31, 2020 2019 Beginning balance $ 43,035 $ 22,391 Additional deferred commissions 46,109 55,024 Amortization of deferred commissions and other adjustments (37,958) (34,380) Ending balance $ 51,186 $ 43,035

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Summary of Cash and Cash Equivalents and Investments' Costs, Gross Unrealized Gains (Losses), and Fair Value by Major Security Type Recorded as Cash and Cash Equivalents or Short-Term or Long-Term Investments	The following tables present our cash and cash equivalents and investments’ costs, gross unrealized gains (losses), and fair value by major security type recorded as cash and cash equivalents or short-term or long-term investments (in thousands): As of December 31, 2020 Cost Net Fair Value Cash and Short-term Long-term Cash $ 88,991 $ — $ 88,991 $ 88,991 $ — $ — Level 1: Money market funds 35,010 — 35,010 35,010 — — Subtotal 35,010 — 35,010 35,010 — — Level 2: Commercial paper 161,124 (8) 161,116 46,491 114,625 — Certificates of deposit 2,800 — 2,800 — 2,800 — U.S. Treasury and agency bonds 554,860 1,220 556,080 1,399 358,822 195,859 Corporate bonds 177,790 349 178,139 — 108,198 69,941 Subtotal 896,574 1,561 898,135 47,890 584,445 265,800 Level 3 — — — — — — Total $ 1,020,575 $ 1,561 $ 1,022,136 $ 171,891 $ 584,445 $ 265,800 As of December 31, 2019 Cost Net Fair Value Cash and Short-term Long-term Cash $ 53,039 $ — $ 53,039 $ 53,039 $ — $ — Level 1: Money market funds 223,580 — 223,580 223,580 — — Subtotal 223,580 — 223,580 223,580 — — Level 2: Commercial paper 217,140 (6) 217,134 98,325 118,809 — Certificates of deposit 1,000 — 1,000 — — 1,000 U.S. Treasury and agency bonds 294,953 199 295,152 35,005 161,767 98,380 Corporate bonds 184,516 444 184,960 — 96,419 88,541 Subtotal 697,609 637 698,246 133,330 376,995 187,921 Level 3 — — — — — — Total $ 974,228 $ 637 $ 974,865 $ 409,949 $ 376,995 $ 187,921

Allowance for Doubtful Accoun_2

Allowance for Doubtful Accounts and Sales Reserves (Tables)	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Summary of Changes in the Allowance for Doubtful Accounts	The following table summarizes the changes in the allowance for doubtful accounts and sales reserve included in accounts receivable in our consolidated balance sheets (in thousands): Year Ended December 31, 2020 2019 2018 Beginning balance $ 2,662 $ 2,297 $ 1,714 Provision 2,544 1,513 2,160 Recoveries (1,225) (600) (693) Charge-offs (867) (548) (884) Ending balance $ 3,114 $ 2,662 $ 2,297 The following table summarizes the changes in the allowance applied to our contract assets in our consolidated balance sheets (in thousands): Year Ended December 31, 2020 2019 2018 Beginning balance $ 205 $ 180 $ 62 Adoption of new accounting standard - ASC 326 609 — — Provision 1,818 197 197 Recoveries (110) (172) (79) Charge-offs (84) — — Ending balance $ 2,438 $ 205 $ 180

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Property and equipment, net	Useful lives by asset category are as follows: Computer equipment 3 years Furniture and fixtures 3 to 7 years Leasehold improvement Shorter of useful life or lease term Property and equipment, net consisted of the following (in thousands): Year Ended December 31, 2020 2019 Computer equipment & software $ 14,627 $ 10,521 Furniture and fixtures 9,941 4,972 Leasehold improvements 22,006 10,438 Construction in process 8,618 3,771 $ 55,192 $ 29,702 Less: Accumulated depreciation and amortization (14,547) (9,406) Total property and equipment, net $ 40,645 $ 20,296

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Change in Carrying Amount of Goodwill	The change in carrying amount of goodwill was as follows (in thousands): Goodwill as of December 31, 2018 $ 9,494 Goodwill recorded in connection with acquisition 27,437 Effects of foreign currency translation (21) Goodwill as of December 31, 2019 $ 36,910 Effects of foreign currency translation 160 Goodwill as of December 31, 2020 $ 37,070
Schedule of Intangible Assets	Intangible assets consisted of the following (in thousands, except years): As of December 31, 2020 Weighted-Average Gross Carrying Accumulated Net Carrying Customer Relationships 7.0 $ 1,652 $ (678) $ 974 Completed Technology 5.7 21,780 (6,563) 15,217 $ 23,432 $ (7,241) $ 16,191 As of December 31, 2019 Weighted-Average Gross Carrying Accumulated Net Carrying Customer Relationships 7.0 $ 1,503 $ (402) $ 1,101 Completed Technology 5.4 27,821 (6,839) 20,982 $ 29,324 $ (7,241) $ 22,083
Schedule of Intangible Asset Amortization Expense	We classified intangible asset amortization expense in the accompanying consolidated statements of operations and comprehensive income (loss) as follows (in thousands): Year Ended December 31, 2020 2019 2018 Cost of revenue $ 3,758 $ 3,801 $ 1,809 Sales and marketing 212 221 220 Total $ 3,970 $ 4,022 $ 2,029
Schedule of Finite-Lived Intangible Assets Estimated Remaining Amortization Expense	The following table presents our estimates of remaining amortization expense for each of the five succeeding fiscal years and thereafter for intangible assets at December 31, 2020 (in thousands): 2021 $ 4,622 2022 4,622 2023 2,630 2024 1,954 2025 1,377 Thereafter 986 Total amortization expense $ 16,191

Convertible Senior Notes (Table

Convertible Senior Notes (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Convertible Debt	The following table presents details of our convertible senior notes, which are further discussed below (original principal in thousands): Month Issued Maturity Date Original Principal (including over-allotment) Coupon Interest Rate Effective Interest Rate Conversion Rate Initial Conversion Price 2023 Notes May and June 2018 June 1, 2023 $ 230,000 0.5 % 7.00 % $ 22.5572 $ 44.33 2024 Notes August 2019 August 1, 2024 $ 400,000 0.5 % 4.96 % $ 5.2809 $ 189.36 2026 Notes August 2019 August 1, 2026 $ 400,000 1.0 % 5.41 % $ 5.2809 $ 189.36 The Notes consisted of the following (in thousands): As of December 31, 2020 As of December 31, 2019 2023 Notes 2024 Notes 2026 Notes 2023 Notes 2024 Notes 2026 Notes Liability: Principal $ 84,748 $ 400,000 $ 400,000 $ 84,759 $ 400,000 $ 400,000 Less: debt discount and issuance costs, net of amortization (12,129) (58,148) (84,351) (16,605) (72,669) (97,010) Net carrying amount $ 72,619 $ 341,852 $ 315,649 $ 68,154 $ 327,331 $ 302,990 Equity, net of issuance costs $ 46,473 $ 69,749 $ 93,380 $ 46,474 $ 69,749 $ 93,380
Schedule of Convertible Senior Notes	The following table sets forth interest expense recognized related to the Notes (in thousands): Year Ended December 31, 2020 2019 Contractual interest expense $ 6,424 $ 3,186 Amortization of debt issuance costs and discount 31,654 18,625 Total $ 38,078 $ 21,811
Schedule of Contractual Obligations and Contractual Interest	The following table sets forth future contractual obligations of contractual interest and principal related to the Notes (in thousands): Payments Due by Period Total Less Than 1 Year 1 to 3 Years 3 to 5 Years More Than 5 Years Notes and related interest $ 917,808 $ 6,424 $ 97,384 $ 410,000 $ 404,000 2021 $ 40,155 2022 17,964 2023 378 2024 2,033 2025 9 Thereafter — Total minimum payments $ 60,539

Accrued Payroll and Payroll-R_2

Accrued Payroll and Payroll-Related Liabilities (Tables)	12 Months Ended
	Dec. 31, 2020
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Accrued Liabilities	Accrued payroll and payroll-related liabilities included accrued commissions and bonuses as follows (in thousands): As of December 31, 2020 2019 Accrued commissions $ 11,793 $ 23,037 Accrued bonuses $ 15,046 $ 16,730

Equity Awards (Tables)

Equity Awards (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Schedule of Stock Option Activity	Stock option activity, excluding activity related to the ESPP, during the year ended December 31, 2020 consisted of the following (in thousands, except weighted-average information): Options Weighted- Aggregate Intrinsic Value Weighted-Average Remaining Contractual Term (Years) Options outstanding at December 31, 2019 2,712 $ 22.58 $ 211,488 6.6 Granted 640 139.88 Exercised (1,072) 15.09 $ 118,551 Cancelled/forfeited (209) 47.26 Options outstanding at December 31, 2020 2,071 $ 60.22 $ 138,942 7.0 Exercisable 1,120 $ 17.11 $ 117,230 5.4 Vested and expected to vest at December 31, 2020 2,071 $ 60.22 $ 138,942 7.0
Schedule of Weighted-average Assumption Used for Stock Options	The following table presents the weighted-average assumptions used for stock options granted under our 2017 Plan and for shares of our Class A common stock issued under our ESPP for each of the years indicated: Stock Options Employee Stock Purchase Plan 2020 2019 2018 2020 2019 2018 Expected term (in years) 5.8 5.8 6.1 0.5 0.5 0.5 Estimated volatility 48 % 38 % 41 % 78 % 56 % 52 % Risk-free interest rate 1 % 2 % 2 % 1 % 2 % 2 % Estimated dividend yield — — — — — — Weighted average fair value $ 62.37 $ 32.20 $ 12.09 $ 48.07 $ 30.02 $ 12.13
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions	The following table presents the weighted-average assumptions used for stock options granted under our 2017 Plan and for shares of our Class A common stock issued under our ESPP for each of the years indicated: Stock Options Employee Stock Purchase Plan 2020 2019 2018 2020 2019 2018 Expected term (in years) 5.8 5.8 6.1 0.5 0.5 0.5 Estimated volatility 48 % 38 % 41 % 78 % 56 % 52 % Risk-free interest rate 1 % 2 % 2 % 1 % 2 % 2 % Estimated dividend yield — — — — — — Weighted average fair value $ 62.37 $ 32.20 $ 12.09 $ 48.07 $ 30.02 $ 12.13
Schedule of RSU Activity	RSU activity during the year ended December 31, 2020 consisted of the following (in thousands, except weighted-average information): Awards Weighted- Aggregate Intrinsic Value RSUs outstanding at December 31, 2019 1,576 $ 64.46 $ 157,752 Granted 1,224 132.89 Vested (518) 60.22 $ 62,482 Cancelled/forfeited (322) 84.41 RSUs outstanding at December 31, 2020 1,960 $ 105.04 $ 238,764 RSUs expected to vest at December 31, 2020 1,960 $ 105.04 $ 238,764
Schedule of Stock-based Compensation Expense	We classified stock-based compensation expense in the accompanying consolidated statements of operations and comprehensive income (loss) as follows (in thousands): Year Ended December 31, 2020 2019 2018 Cost of revenue $ 2,550 $ 1,634 $ 797 Research and development 18,388 6,954 3,699 Sales and marketing 28,463 12,659 6,153 General and administrative 25,515 11,878 5,998 Total $ 74,916 $ 33,125 $ 16,647

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Lease-Related Assets and Liabilities	The table below presents lease-related assets and liabilities recorded on the consolidated balance sheet (in thousands): As of December 31, Classification 2020 2019 Assets Operating lease right-of-use assets Operating lease right-of-use assets $ 62,508 $ 33,600 Liabilities Operating lease liabilities (current) Accrued expenses and other current liabilities $ 11,471 $ 6,627 Operating lease liabilities (noncurrent) Operating lease liabilities 53,860 29,293 Total lease liabilities $ 65,331 $ 35,920
Lease Costs and Supplemental Information	The following lease costs were included in our consolidated statements of operations and comprehensive income (loss) (in thousands): Year Ended December 31, 2020 2019 Operating lease cost $ 11,150 $ 7,066 Short-term lease cost 1,451 1,604 Variable lease cost 3,993 1,767 Total lease cost $ 16,594 $ 10,437 Supplemental Information The table below presents supplemental balance sheet information related to operating leases: Year Ended December 31, 2020 2019 Weighted-average remaining lease term (in years) 5.7 5.9 Weighted-average discount rate 5.03 % 6.18 %
Undiscounted Cash Flows for Operating Lease Liabilities	The table below reconciles the undiscounted cash flows of the operating leases for each of the first five years, and total of the remaining years, to the operating lease liabilities recorded on the consolidated balance sheet as of December 31, 2020 (in thousands): 2021 $ 14,471 2022 13,911 2023 12,083 2024 11,240 2025 10,551 2026 7,411 Thereafter 6,066 Total minimum lease payments $ 75,733 Less imputed interest (10,402) Present value of future minimum lease payments $ 65,331 Less current obligations under leases (11,471) Long-term lease obligations $ 53,860

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Schedule of Contractual Obligations and Contractual Interest	The following table sets forth future contractual obligations of contractual interest and principal related to the Notes (in thousands): Payments Due by Period Total Less Than 1 Year 1 to 3 Years 3 to 5 Years More Than 5 Years Notes and related interest $ 917,808 $ 6,424 $ 97,384 $ 410,000 $ 404,000 2021 $ 40,155 2022 17,964 2023 378 2024 2,033 2025 9 Thereafter — Total minimum payments $ 60,539

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Components of Income (Loss) Before Provision for (Benefit of) Income Taxes	The components of income (loss) before benefit of income taxes were as follows (in thousands): Year Ended December 31, 2020 2019 2018 Domestic $ (32,569) $ 9,259 $ 27,849 Foreign 4,924 (3,195) (2,415) Total $ (27,645) $ 6,064 $ 25,434
Components of Provision for (Benefit of) Income Taxes	The components of the benefit of income taxes were as follows (in thousands): Year Ended December 31, 2020 2019 2018 Current: Federal $ — $ (375) $ (14) State 248 158 314 Foreign 327 1,176 587 Total current income tax expense $ 575 $ 959 $ 887 Deferred: Federal $ (2,617) $ (18,684) $ (2,321) State (958) (3,406) (869) Foreign (271) 52 (283) Total deferred income tax benefit: $ (3,846) $ (22,038) $ (3,473) Total $ (3,271) $ (21,079) $ (2,586)
Reconciliation of Provision for (Benefit of) Income Taxes at Statutory Rate and Provision for (Benefit of) Income Taxes	The following table reconciles our benefit of income taxes at the statutory rate to that at the effective tax rate, using a U.S. federal statutory tax rate of 21% for each of 2020, 2019, and 2018 (in thousands): Year Ended December 31, 2020 2019 2018 Income tax at federal statutory rate $ (5,806) $ 1,273 $ 5,341 Increase/(decrease) in tax resulting from: State income tax expense, net of federal (3,105) (2,567) (438) Foreign rate differential 47 789 853 Stock-based compensation (16,852) (20,913) (7,916) Change in valuation allowance 24,363 18,129 510 Meals and entertainment 764 658 310 Research credits (4,677) (3,177) (1,563) Tax basis step-up due to internal reorganization — (15,321) — Other 1,995 50 317 Total benefit of income taxes $ (3,271) $ (21,079) $ (2,586)
Significant Components of Deferred Income Tax Assets (Liabilities)	The following table shows the significant components of deferred income tax assets (liabilities) (in thousands): As of December 31, 2020 2019 Deferred tax assets: Deferred revenue $ 923 $ 739 Net operating losses 20,147 10,997 Accruals and reserves 5,513 5,679 Research & other credits 17,770 11,027 Intangibles 10,570 12,291 Operating lease liabilities 14,475 7,586 Effect of Section 163(j) on interest expense 6,696 4,046 Stock-based compensation 14,376 6,623 Other — 353 Total deferred tax assets 90,470 59,341 Less valuation allowance (44,046) (19,683) Net deferred tax assets 46,424 39,658 Deferred tax liabilities: Operating lease right-of-use assets (13,831) (7,002) Deferred commissions (10,213) (8,924) Convertible senior notes (16,990) (20,459) Effects of ASC 606 adoption (4,343) (8,819) Other (776) (48) Total deferred tax liabilities (46,153) (45,252) Net deferred tax assets (liabilities) $ 271 $ (5,594)
Summary of Changes in the Valuation Allowance	The following table shows the changes in our valuation allowance (in thousands): Year Ended December 31, 2020 2019 2018 Beginning balance $ 19,683 $ 1,138 $ 7,304 Decrease in valuation allowance due to adoption of ASC 606 — — (6,676) Increase in valuation allowance due to internal reorganization — 15,321 — Other increase in valuation allowance 24,363 3,224 510 Ending balance $ 44,046 $ 19,683 $ 1,138
Schedule of Activity in Gross Unrecognized Tax Benefits	The following table shows the activity in gross unrecognized tax benefits (in thousands): Year Ended December 31, 2020 2019 2018 Balance at beginning of year $ 7,556 $ 6,234 $ 5,794 Additions based on tax position related to the current year 652 1,322 391 Additions for tax positions of prior years 312 — 49 Balance at end of year $ 8,520 $ 7,556 $ 6,234

Basic and Diluted Net Loss Per

Basic and Diluted Net Loss Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Schedule of Computation of Net Income (Loss) per Share	The following table presents the computation of net income (loss) per share (in thousands except per share data): Year Ended December 31, 2020 2019 2018 Numerator: Net income (loss) attributable to common stockholders $ (24,374) $ 27,143 $ 28,020 Denominator: Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, basic 66,058 63,424 60,829 Effect of dilutive securities: Convertible senior notes — 1,975 409 Employee stock awards — 3,259 3,506 Contingently issuable shares — 3 — Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, diluted 66,058 68,661 64,744 Net income (loss) per share attributable to common stockholders, basic $ (0.37) $ 0.43 $ 0.46 Net income (loss) per share attributable to common stockholders, diluted $ (0.37) $ 0.40 $ 0.43
Schedule of Anti-dilutive Securities Excluded from Computation of Diluted Net Loss Per Share	The following weighted-average equivalent shares of common stock, excluding the impact of the treasury stock method, were excluded from the diluted net income (loss) per share calculation because their inclusion would have been anti-dilutive (in thousands): Year Ended December 31, 2020 2019 2018 Stock awards 4,053 209 510 Convertible senior notes 6,137 1,644 — Total shares excluded from net income (loss) per share 10,190 1,853 510

Segment and Geographic Inform_2

Segment and Geographic Information Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Schedule of Long-lived Assets Classified By Geographic Location	Long-lived assets classified by geographic location, and, with respect to the year ended December 31, 2019, with countries over 10% of this total, were as follows (in thousands): As of December 31, Long-lived assets: 2020 2019 United States $ 84,055 $ 39,641 United Kingdom 6,236 7,263 Other countries 12,862 6,992 Total $ 103,153 $ 53,896

Selected Quarterly Financial _2

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Data	The following table sets forth unaudited quarterly financial information for the years ended December 31, 2020 and 2019. We have prepared the unaudited quarterly consolidated statements of operations data on a basis consistent with the audited annual consolidated financial statements. In the opinion of management, the financial information in this table reflects all adjustments, consisting of normal and recurring adjustments, necessary for the fair statement of this data (in thousands except per share data): 2020 Quarter Ended March 31 June 30 September 30 December 31 Revenue $ 108,831 $ 96,233 $ 129,717 $ 160,527 Gross profit $ 95,784 $ 86,598 $ 119,303 $ 149,784 Income (loss) from operations $ (20,105) $ (17,794) $ 9,633 $ 24,359 Net income (loss) $ (15,473) $ (35,293) $ 4,357 $ 22,035 Diluted income (loss) per share $ (0.24) $ (0.53) $ 0.06 $ 0.32 2019 Quarter Ended March 31 June 30 September 30 December 31 Revenue $ 76,020 $ 82,043 $ 103,397 $ 156,450 Gross profit $ 68,020 $ 72,748 $ 93,752 $ 144,239 Income (loss) from operations $ (4,402) $ (8,288) $ 11,936 $ 38,735 Net income (loss) $ 5,914 $ (3,219) $ (6,240) $ 30,688 Diluted income (loss) per share $ 0.09 $ (0.05) $ (0.10) $ 0.44

Significant Accounting Polici_4

Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2020USD ($)reporting_unit	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jan. 01, 2020USD ($)	Dec. 31, 2017USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amounts receivable from a credit card processor	$ 2,200,000	$ 600,000
Restricted cash	$ 1,800,000	1,500,000
Capitalized contract costs, amortization period	4 years
Recognized royalty expense	$ 12,400,000	12,200,000	$ 7,200,000
Number of reporting units | reporting_unit	1
Revenue, performance obligation, description of timing	one to three years and are billed annually in advance with net payment terms of 60 days or less
Advertising expenses	$ 16,300,000	17,800,000	9,100,000
Transaction gains (losses)	3,000,000	1,000,000	(1,500,000)
Debt securities, available-for-sale, allowance for credit loss				$ 0
Decrease to retained earnings	(476,791,000)	(424,907,000)	(301,818,000)		$ (153,504,000)
Retained Earnings (Accumulated Deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to retained earnings	$ 10,748,000	(14,235,000)	$ 12,908,000		$ 103,546,000
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to retained earnings		609,000
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings (Accumulated Deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to retained earnings		$ 609,000		$ 600,000
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Intangible assets estimated useful lives	2 years
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Intangible assets estimated useful lives	8 years
Accounts Receivable | Customer Concentration Risk
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percent		10.60%
Software and Software Development Costs
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property and equipment, useful life	3 years

Significant Accounting Polici_5

Significant Accounting Policies - Schedule of Useful Lives by Asset Category (Details)	12 Months Ended
	Dec. 31, 2020
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	7 years

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenue	$ 160,527	$ 129,717	$ 96,233	$ 108,831	$ 156,450	$ 103,397	$ 82,043	$ 76,020	$ 495,308	$ 417,910	$ 253,570
United States
Disaggregation of Revenue [Line Items]
Total revenue									338,190	296,108	178,774
International
Disaggregation of Revenue [Line Items]
Total revenue									$ 157,118	$ 121,802	$ 74,796
Geographic Concentration Risk | Revenue from Contract with Customer | United Kingdom
Disaggregation of Revenue [Line Items]
Concentration risk, percent										10.70%	10.20%
Professional Services | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Concentration risk, percent									5.00%

Revenue - Contract Assets and C

Revenue - Contract Assets and Contract Liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impairments of assets	$ 0	$ 0
Revenue recognized	83,900,000	84,000,000
Prepaid Expenses and Other Current Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with Customer, Asset, Net, Current	25,400,000	18,500,000
Other Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract asset	$ 37,200,000	$ 39,300,000
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Transferred to receivables period	12 months
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Transferred to receivables period	24 months

Revenue - Assets Recognized fro

Revenue - Assets Recognized from the Costs to Obtain Our Contracts with Customers (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Change in Contract with Customer, Asset [Roll Forward]
Beginning Balance	$ 43,035,000	$ 22,391,000
Additional deferred commissions	46,109,000	55,024,000
Amortization of deferred commissions and other adjustments	(37,958,000)	(34,380,000)
Ending Balance	51,186,000	43,035,000
Impairments of assets	0	0
Deferred commissions	$ 24,800,000	$ 17,500,000

Revenue - Remaining Performance

Revenue - Remaining Performance Obligation (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Remaining performance obligation, amount	$ 484.3	$ 407
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation, amount		$ 340.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, period	24 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation, amount	$ 434.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, period	24 months

Business Combinations (Detail)

Business Combinations (Detail) - USD ($) $ in Thousands	Oct. 03, 2019	Apr. 04, 2019	Feb. 28, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Shares issued pursuant to stock awards, net of tax withholdings related to vesting of restricted stock units				$ 1,919	$ 9,513	$ 11,425
Goodwill				$ 37,070	$ 36,910	$ 9,494
Completed Technology
Business Acquisition [Line Items]
Intangible assets estimated useful lives				5 years 8 months 12 days	5 years 4 months 24 days
Feature Labs Inc.
Business Acquisition [Line Items]
Business combination acquired percentage	100.00%
Total consideration	$ 25,200
Shares issued pursuant to stock awards, net of tax withholdings related to vesting of restricted stock units	$ 12,500
Business combination, employee retention compensation period	48 months
Business combination, employee retention compensation and milestones achievement period	36 months
Goodwill	$ 18,000
Purchase price allocation, assets acquired and liabilities assumed, net	700
Feature Labs Inc. | Completed Technology | Level 3
Business Acquisition [Line Items]
Finite lived intangible assets acquired	$ 7,900
Intangible assets estimated useful lives	7 years
ClearStory Data Inc.
Business Acquisition [Line Items]
Business combination acquired percentage		100.00%
Total consideration		$ 19,600
Business combination, employee retention compensation and milestones achievement period		24 months
Goodwill		$ 9,500
Purchase price allocation, assets acquired and liabilities assumed, net		600
Cash consideration held back for customary indemnification matters amount		$ 3,000
Cash consideration held back for customary indemnification matters period		18 months
Business combination, employee retention compensation		$ 6,000
ClearStory Data Inc. | Completed Technology | Level 3
Business Acquisition [Line Items]
Finite lived intangible assets acquired		$ 10,700
Intangible assets estimated useful lives		4 years
Alteryx ANZ Pty Limited
Business Acquisition [Line Items]
Business combination acquired percentage			100.00%
Total consideration			$ 5,700
Goodwill			900
Purchase price allocation, assets acquired and liabilities assumed, net			3,200
Business combination, purchase price in cash			3,300
Contingent consideration paid in cash			1,200
Settlement of preexisting relationships			1,200
Contingent earn out consideration			$ 1,500
Contingent earn-out consideration payment period			2 years
Alteryx ANZ Pty Limited | Customer-Related Intangible Assets
Business Acquisition [Line Items]
Completed technology intangible assets			$ 1,600
Alteryx ANZ Pty Limited | Customer-Related Intangible Assets | Level 3
Business Acquisition [Line Items]
Finite lived intangible assets acquired			$ 1,600
Weighted average amortization period			7 years
Measurement Input, Discount Rate | Feature Labs Inc. | Completed Technology | Level 3
Business Acquisition [Line Items]
Business combination, measurement input, discount rate	0.400
Measurement Input, Discount Rate | ClearStory Data Inc. | Completed Technology | Level 3
Business Acquisition [Line Items]
Business combination, measurement input, discount rate		0.20
Minimum
Business Acquisition [Line Items]
Intangible assets estimated useful lives				2 years
Maximum
Business Acquisition [Line Items]
Intangible assets estimated useful lives				8 years

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Cash and Cash Equivalents and Investments' Costs, Gross Unrealized Losses, and Fair Value by Major Security Type Recorded as Cash and Cash Equivalents or Short-Term or Long-Term Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 171,891	$ 409,949
Short-term investments	584,445	376,995
Long-term investments	265,800	187,921
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	171,891	409,949
Gross unrealized gains (losses)	1,561	637
Cash and cash equivalents and investment, cost	1,020,575	974,228
Cash and cash equivalents and investments, fair value	1,022,136	974,865
Short-term investments	584,445	376,995
Long-term investments	265,800	187,921
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	35,010	223,580
Cash and cash equivalents, fair value	35,010	223,580
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	47,890	133,330
Investments, cost	896,574	697,609
Gross unrealized gains (losses)	1,561	637
Investments, fair value	898,135	698,246
Short-term investments	584,445	376,995
Long-term investments	265,800	187,921
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Investments, cost	0	0
Gross unrealized gains (losses)	0	0
Investments, fair value	0	0
Short-term investments	0	0
Long-term investments	0	0
Cash | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	88,991	53,039
Cash and cash equivalents, fair value	88,991	53,039
Money market funds | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	35,010	223,580
Cash and cash equivalents, fair value	35,010	223,580
Commercial paper | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	46,491	98,325
Investments, cost	161,124	217,140
Gross unrealized gains (losses)	(8)	(6)
Investments, fair value	161,116	217,134
Short-term investments	114,625	118,809
Long-term investments	0	0
Certificates of deposit | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Investments, cost	2,800	1,000
Gross unrealized gains (losses)	0	0
Investments, fair value	2,800	1,000
Short-term investments	2,800	0
Long-term investments	0	1,000
U.S. Treasury and agency bonds | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	1,399	35,005
Investments, cost	554,860	294,953
Gross unrealized gains (losses)	1,220	199
Investments, fair value	556,080	295,152
Short-term investments	358,822	161,767
Long-term investments	195,859	98,380
Corporate bonds | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Investments, cost	177,790	184,516
Gross unrealized gains (losses)	349	444
Investments, fair value	178,139	184,960
Short-term investments	108,198	96,419
Long-term investments	$ 69,941	$ 88,541

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross unrealized losses	$ 0.1	$ 0.1
Interest income from marketable securities	10.5	9.2	$ 5.4
Convertible debt, fair value	$ 1,100	$ 956.8
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term investments maturity period	1 year	1 year
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term investments maturity period	2 years	2 years
Domestic Cash And Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, restricted cash and investments	$ 1,000	$ 963.4

Allowance for Doubtful Accoun_3

Allowance for Doubtful Accounts and Sales Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 2,662	$ 2,297	$ 1,714
Provision	2,544	1,513	2,160
Recoveries	(1,225)	(600)	(693)
Charge-offs	(867)	(548)	(884)
Ending balance	3,114	2,662	2,297
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Beginning balance	205	180	62
Provision	1,818	197	197
Recoveries	(110)	(172)	(79)
Charge-offs	(84)	0	0
Ending balance	2,438	205	180
COVID-19 Pandemic
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Increase in expected credit loss caused by COVID	600
Cumulative Effect, Period of Adoption, Adjustment
Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 609	0	0
Ending balance		$ 609	$ 0

Property and Equipment - Schedu

Property and Equipment - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 55,192	$ 29,702
Less: Accumulated depreciation and amortization	(14,547)	(9,406)
Total property and equipment, net	40,645	20,296
Computer equipment & software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,627	10,521
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,941	4,972
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	22,006	10,438
Construction in process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 8,618	$ 3,771

Property and Equipment - Additi

Property and Equipment - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 8.1	$ 4.3	$ 3.2

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Schedule of Change in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill at beginning of year	$ 36,910	$ 9,494
Goodwill recorded in connection with acquisitions		27,437
Effects of foreign currency translation	160	(21)
Goodwill at end of year	$ 37,070	$ 36,910

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 23,432	$ 29,324
Accumulated Amortization	(7,241)	(7,241)
Net Carrying Value	$ 16,191	$ 22,083
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Useful Life in Years	7 years	7 years
Gross Carrying Value	$ 1,652	$ 1,503
Accumulated Amortization	(678)	(402)
Net Carrying Value	$ 974	$ 1,101
Completed Technology
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Useful Life in Years	5 years 8 months 12 days	5 years 4 months 24 days
Gross Carrying Value	$ 21,780	$ 27,821
Accumulated Amortization	(6,563)	(6,839)
Net Carrying Value	15,217	$ 20,982
Impairment charge related to completed technology assets	$ 2,000

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Schedule of Intangible Asset Amortization Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 3,970	$ 4,022	$ 2,029
Cost of revenue
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	3,758	3,801	1,809
Sales and marketing
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 212	$ 221	$ 220

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets Estimated Remaining Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
2021	$ 4,622
2022	4,622
2023	2,630
2024	1,954
2025	1,377
Thereafter	986
Net Carrying Value	$ 16,191	$ 22,083

Convertible Senior Notes - Summ

Convertible Senior Notes - Summary of Debt (Details) - Convertible Debt	1 Months Ended	3 Months Ended
	Aug. 31, 2019USD ($)$ / shares	Jun. 30, 2018USD ($)$ / shares	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Convertible Senior Notes due 2023, Over-Allotment Option, 0.5%
Debt Instrument [Line Items]
Original Principal (including over-allotment)		$ 30,000,000
Principal		30,000,000
Convertible Senior Notes due 2026, Over-Allotment Option, 1.0%
Debt Instrument [Line Items]
Original Principal (including over-allotment)	$ 50,000,000
Principal	50,000,000
Convertible Senior Notes due 2024, Over-Allotment Option, 0.5%
Debt Instrument [Line Items]
Original Principal (including over-allotment)	50,000,000
Principal	50,000,000
Convertible Senior Notes due 2023, 0.5%
Debt Instrument [Line Items]
Original Principal (including over-allotment)		$ 230,000,000	$ 84,748,000	$ 84,759,000
Coupon Interest Rate		0.50%
Effective Interest Rate		7.00%
Conversion Rate		0.0225572
Initial Conversion Price | $ / shares		$ 44.33
Principal		$ 230,000,000	84,748,000	84,759,000
Less: debt discount and issuance costs, net of amortization			(12,129,000)	(16,605,000)
Net carrying amount			72,619,000	68,154,000
Equity, net of issuance costs			46,473,000	46,474,000
0.50% Convertible Seniors Notes Due 2024
Debt Instrument [Line Items]
Original Principal (including over-allotment)	$ 400,000,000		400,000,000	400,000,000
Coupon Interest Rate	0.50%
Effective Interest Rate	4.96%
Conversion Rate	0.0052809
Principal	$ 400,000,000		400,000,000	400,000,000
Less: debt discount and issuance costs, net of amortization			(58,148,000)	(72,669,000)
Net carrying amount			341,852,000	327,331,000
Equity, net of issuance costs			69,749,000	69,749,000
Convertible Notes Due 2026, 1.0%
Debt Instrument [Line Items]
Original Principal (including over-allotment)	$ 400,000,000		400,000,000	400,000,000
Coupon Interest Rate	1.00%
Effective Interest Rate	5.41%
Conversion Rate	0.0052809
Initial Conversion Price | $ / shares	$ 189.36
Principal	$ 400,000,000		400,000,000	400,000,000
Less: debt discount and issuance costs, net of amortization			(84,351,000)	(97,010,000)
Net carrying amount			315,649,000	302,990,000
Equity, net of issuance costs			$ 93,380,000	$ 93,380,000

Convertible Senior Notes - Addi

Convertible Senior Notes - Additional Information (Details)	1 Months Ended	3 Months Ended		12 Months Ended
	Aug. 31, 2019USD ($)$ / optionshares	Dec. 31, 2020USD ($)day	Jun. 30, 2018USD ($)$ / option	Dec. 31, 2020USD ($)day	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Derivative [Line Items]
Capped calls, cost	$ 87,400,000		$ 19,100,000
Capped calls, deferred tax asset	$ 20,900,000		$ 4,600,000
Debt Instrument [Line Items]
Loss on induced conversion and debt extinguishment				$ 1,000	$ 20,507,000	$ 0
Loss on induced conversion and debt extinguishment				(1,000)	(20,507,000)	$ 0
Price Risk Derivative
Derivative [Line Items]
Capped calls, initial strike price (in dollars per share) | $ / option	189.36		44.33
Capped calls, cap price (in dollars per share) | $ / option	315.60		62.22
Convertible Senior Notes due 2023, 0.5% | Debt Instrument, Conversion, Option Two | Convertible Debt
Debt Instrument [Line Items]
Loss on induced conversion and debt extinguishment	$ 20,500,000
Convertible debt, consideration given in excess of original conversion terms	8,200,000
Loss on induced conversion and debt extinguishment	12,300,000
Convertible Debt | Convertible Senior Notes due 2023, 0.5%
Debt Instrument [Line Items]
Principal		$ 84,748,000	$ 230,000,000	84,748,000	84,759,000
Coupon interest rate			0.50%
Senior notes in excess of principal				$ 148,100,000
Convertible Debt | Convertible Senior Notes due 2023, 0.5% | Debt Instrument, Conversion, Option One
Debt Instrument [Line Items]
Threshold trading days | day				20
Threshold consecutive trading days | day				30
Threshold percentage of stock price trigger				130.00%
Convertible debt, converted instrument, original amount	145,200,000
Debt extinguishment with interest	145,400,000
Debt conversion, converted instrument, amount				$ 11,000
Convertible Debt | 0.50% Convertible Seniors Notes Due 2024
Debt Instrument [Line Items]
Principal	$ 400,000,000	400,000,000		400,000,000	400,000,000
Coupon interest rate	0.50%
Convertible Debt | Convertible Notes Due 2026, 1.0%
Debt Instrument [Line Items]
Principal	$ 400,000,000	$ 400,000,000		$ 400,000,000	$ 400,000,000
Coupon interest rate	1.00%
Convertible Debt | Convertible Senior Notes Due 2023, 2024, 2026 | Debt Instrument, Conversion, Option One
Debt Instrument [Line Items]
Threshold trading days | day		20
Threshold consecutive trading days | day		30
Threshold percentage of stock price trigger		130.00%
Convertible Debt | Convertible Senior Notes Due 2023, 2024, 2026 | Debt Instrument, Conversion, Option Two
Debt Instrument [Line Items]
Threshold trading days | day		5
Threshold consecutive trading days | day		5
Threshold percentage of stock price trigger		98.00%
Class A Common Stock
Derivative [Line Items]
Capped calls, retirement of common stock (in shares) | shares	285,466
Class A Common Stock | Debt Instrument, Conversion, Option Two
Debt Instrument [Line Items]
Convertible debt, converted instrument, shares issued | shares	2,200,000

Convertible Senior Notes - Su_2

Convertible Senior Notes - Summary of Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Amortization of debt issuance costs and discount	$ 31,654	$ 18,625	$ 6,652
Convertible Debt | Convertible senior notes
Debt Instrument [Line Items]
Contractual interest expense	6,424	3,186
Amortization of debt issuance costs and discount	31,654	18,625
Total	$ 38,078	$ 21,811

Convertible Senior Notes - Sche

Convertible Senior Notes - Schedule Of Contractual Obligations and Contractual Interest (Details) $ in Thousands	Dec. 31, 2020USD ($)
Debt Disclosure [Abstract]
Notes and related interest due, total	$ 917,808
Notes and related interest due, less than 1 year	6,424
Notes and related interest due, 1 to 3 years	97,384
Notes and related interest due, 3 to 5 years	410,000
Notes and related interest due, more than 5 years	$ 404,000

Accrued Payroll and Payroll-R_3

Accrued Payroll and Payroll-Related Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Accrued commissions	$ 11,793	$ 23,037
Accrued bonuses	$ 15,046	$ 16,730

Stockholders' Equity (Details)

Stockholders' Equity (Details)	1 Months Ended
	Feb. 28, 2017Vote	Dec. 31, 2020$ / sharesshares	Dec. 31, 2019$ / sharesshares	Mar. 31, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum percentage of votes required for stock conversion	66.67%
Preferred stock, shares authorized (in shares)		10,000,000	10,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.0001	$ 0.0001
Preferred stock, shares outstanding (in shares)		0	0
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of votes per share | Vote	1
Common stock shares authorized (in shares)		500,000,000	500,000,000	500,000,000
Common stock par value per share (in dollars per share) | $ / shares		$ 0.0001		$ 0.0001
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of votes per share | Vote	10
Threshold percentage of common stock conversion	10.00%
Common stock conversion ratio	1
Common stock shares authorized (in shares)		500,000,000	500,000,000	500,000,000
Common stock par value per share (in dollars per share) | $ / shares		$ 0.0001	$ 0.0001	$ 0.0001
Undesignated Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized (in shares)				10,000,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.0001

Equity Awards - Additional Info

Equity Awards - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Feb. 28, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, options, exercises in period, intrinsic value		$ 118,551	$ 115,400	$ 56,900
Share-based payment award, options, grants in period (in dollars per share)		$ 139.88	$ 80.88	$ 28.26
Amended and Restated 2013 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future grant (in shares)		0
2017 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock plan, offering period	6 months
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expiration period from date of grant		10 years
Unrecognized compensation cost related to unvested stock options		$ 39,500
Weighted average period		2 years 4 months 24 days
Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period upon service condition satisfied		3 years
Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period upon service condition satisfied		4 years
Unvested restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period		2 years 2 months 12 days
Share-based payment award, options,vested in period, intrinsic value		$ 62,482	$ 30,200	$ 9,800
Share-based payment award, options, granted in period (in dollars per share)		$ 132.89	$ 90	$ 35.51
Unrecognized compensation expense, adjusted for estimated forfeitures, related to unvested RSUs		$ 156,600
Unvested restricted stock units | 2017 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expiration period from date of grant		10 years
Unvested restricted stock units | 2017 Equity Incentive Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period upon service condition satisfied		3 years
Unvested restricted stock units | 2017 Equity Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period upon service condition satisfied		4 years
Class A Common Stock | 2017 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future grant (in shares)		11,400,000
Stock reserved for issuance under equity award plans (in shares)	5,100,000
Class A Common Stock | 2013 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock reserved for issuance under equity award plans (in shares)	500,000
Class A Common Stock | 2017 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future grant (in shares)		2,600,000
Stock reserved for issuance under equity award plans (in shares)	1,100,000
Percentage of maximum deduction of eligible compensation	15.00%
Stock issued during period, shares, employee stock purchase plans (in shares)		100,000
Common stock par value per share (in dollars per share)		$ 101.37
Class A Common Stock | 2017 Employee Stock Purchase Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares issued (in shares)	11,000,000
Common Class A and Class B | 2017 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock outstanding percentage	5.00%
Common Class A and Class B | 2017 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock outstanding percentage	1.00%
Percentage of purchase price of common stock	85.00%

Equity Awards - Schedule of Sto

Equity Awards - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Options Outstanding
Options outstanding, beginning balance (in shares)	2,712
Granted (in shares)	640
Exercised (in shares)	(1,072)
Cancelled/forfeited (in shares)	(209)
Options outstanding, ending balance (in shares)	2,071	2,712
Exercisable (in shares)	1,120
Vested and expected to vest (in shares)	2,071
Weighted- Average Exercise Price
Options outstanding, beginning balance (in dollars per share)	$ 22.58
Granted (in dollars per share)	139.88	$ 80.88	$ 28.26
Exercised (in dollars per share)	15.09
Cancelled/forfeited (in dollars per share)	47.26
Options outstanding, ending balance (in dollars per share)	60.22	$ 22.58
Exercisable (in dollars per share)	17.11
Vested and expected to vest (in dollars per share)	$ 60.22
Aggregate Intrinsic Value
Options outstanding at beginning of period	$ 211,488
Exercised	118,551	$ 115,400	$ 56,900
Options outstanding at end of period	138,942	$ 211,488
Exercisable	117,230
Vested and expected to vest at December 31, 2020	$ 138,942
Weighted-Average Remaining Contractual Term (Years)
Options outstanding (in years)	7 years	6 years 7 months 6 days
Exercisable (in years)	5 years 4 months 24 days
Vested and expected to vest (in years)	7 years

Equity Awards - Schedule of Wei

Equity Awards - Schedule of Weighted-average Assumption Used for Stock Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	5 years 9 months 18 days	5 years 9 months 18 days	6 years 1 month 6 days
Estimated volatility	48.00%	38.00%	41.00%
Risk-free interest rate	1.00%	2.00%	2.00%
Estimated dividend yield	0.00%	0.00%	0.00%
Weighted average fair value (in dollars per share)	$ 62.37	$ 32.20	$ 12.09
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	6 months	6 months	6 months
Estimated volatility	78.00%	56.00%	52.00%
Risk-free interest rate	1.00%	2.00%	2.00%
Estimated dividend yield	0.00%	0.00%	0.00%
Weighted average fair value (in dollars per share)	$ 48.07	$ 30.02	$ 12.13

Equity Awards - Schedule RSU Ac

Equity Awards - Schedule RSU Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Vested and expected to vest (in shares)	2,071
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date [Roll Forward]
Vested and expected to vest (in dollars per share)	$ 60.22
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Roll Forward]
Vested and expected to vest at December 31, 2020	$ 138,942
Unvested restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Awards outstanding, beginning balance (in shares)	1,576
Granted (in shares)	1,224
Vested (in shares)	(518)
Cancelled/forfeited (in shares)	(322)
Awards outstanding, ending balance (in shares)	1,960	1,576
Vested and expected to vest (in shares)	1,960
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date [Roll Forward]
Awards outstanding, beginning of year (in dollars per share)	$ 64.46
Granted (in dollars per share)	132.89	$ 90	$ 35.51
Vested (in dollars per share)	60.22
Cancelled/forfeited (in dollars per share)	84.41
Awards outstanding, end of year (in dollars per share)	105.04	$ 64.46
Vested and expected to vest (in dollars per share)	$ 105.04
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Roll Forward]
Aggregate intrinsic value at beginning of period	$ 157,752
Aggregate intrinsic value, vested	62,482	$ 30,200	$ 9,800
Aggregate intrinsic value at end of period	238,764	$ 157,752
Vested and expected to vest at December 31, 2020	$ 238,764

Equity Awards - Schedule of S_2

Equity Awards - Schedule of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 74,916	$ 33,125	$ 16,647
Cost of revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	2,550	1,634	797
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	18,388	6,954	3,699
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	28,463	12,659	6,153
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 25,515	$ 11,878	$ 5,998

Retirement Plan (Details)

Retirement Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Contributed to savings plan	$ 6.2	$ 3.9	$ 2.4

Leases - Lease-Related Assets a

Leases - Lease-Related Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 62,508	$ 33,600
Operating lease liabilities (current)	$ 11,471	$ 6,627
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Operating lease liabilities (noncurrent)	$ 53,860	$ 29,293
Total lease liabilities	$ 65,331	$ 35,920

Leases - Lease Costs (Details)

Leases - Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 11,150	$ 7,066
Short-term lease cost	1,451	1,604
Variable lease cost	3,993	1,767
Total lease cost	$ 16,594	$ 10,437

Leases - Supplemental Informati

Leases - Supplemental Information (Details)	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Weighted-average remaining lease term (in years)	5 years 8 months 12 days	5 years 10 months 24 days
Weighted-average discount rate	5.03%	6.18%

Leases - Additional Information

Leases - Additional Information (Details) $ in Thousands	Dec. 31, 2020USD ($)lease	Dec. 31, 2019USD ($)
Lessee, Lease, Description [Line Items]
Lessee, operating lease, lease executed but not yet commenced, number of leases | lease	5
Lease not yet commenced, liability	$ 59,800
Lease not yet commenced, liability, due next 24 months	17,400
Present value of future minimum lease payments	65,331	$ 35,920
Corporate Headquarters
Lessee, Lease, Description [Line Items]
Present value of future minimum lease payments	$ 12,200
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract	2 years
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract	8 years

Leases - Undiscounted Cash Flow

Leases - Undiscounted Cash Flows (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
2021	$ 14,471
2022	13,911
2023	12,083
2024	11,240
2025	10,551
2026	7,411
Thereafter	6,066
Total minimum lease payments	75,733
Less imputed interest	(10,402)
Operating lease liabilities related to corporate headquarters	65,331	$ 35,920
Less current obligations under leases	(11,471)	(6,627)
Operating lease liabilities (noncurrent)	$ 53,860	$ 29,293

Commitments and Contingencies -

Commitments and Contingencies - Contractual Obligations (Details) $ in Thousands	Dec. 31, 2020USD ($)
Commitments and Contingencies Disclosure [Abstract]
2021	$ 40,155
2022	17,964
2023	378
2024	2,033
2025	9
Thereafter	0
Total minimum payments	$ 60,539

Commitments and Contingencies_2

Commitments and Contingencies - Additional Information (Details)	Feb. 12, 2021lawsuit	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Loss Contingencies [Line Items]
Warranty accrual		$ 0
Subsequent Event
Loss Contingencies [Line Items]
Number of claims | lawsuit	3
Indemnification Agreement
Loss Contingencies [Line Items]
Accrued liability		$ 0	$ 0

Income Taxes - Components of In

Income Taxes - Components of Income (Loss) Before Provision for (Benefit of) Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Domestic	$ (32,569)	$ 9,259	$ 27,849
Foreign	4,924	(3,195)	(2,415)
Income (loss) before benefit of income taxes	$ (27,645)	$ 6,064	$ 25,434

Income Taxes - Components of Pr

Income Taxes - Components of Provision for (Benefit of) Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 0	$ (375)	$ (14)
State	248	158	314
Foreign	327	1,176	587
Total current income tax expense	575	959	887
Deferred:
Federal	(2,617)	(18,684)	(2,321)
State	(958)	(3,406)	(869)
Foreign	(271)	52	(283)
Total deferred income tax benefit:	(3,846)	(22,038)	(3,473)
Total	$ (3,271)	$ (21,079)	$ (2,586)

Income Taxes - Schedule of Prov

Income Taxes - Schedule of Provision for (Benefit of) Income Taxes and Effective Tax Rates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax at federal statutory rate	$ (5,806)	$ 1,273	$ 5,341
State income tax expense, net of federal	(3,105)	(2,567)	(438)
Foreign rate differential	47	789	853
Stock-based compensation	(16,852)	(20,913)	(7,916)
Change in valuation allowance	24,363	18,129	510
Meals and entertainment	764	658	310
Research credits	(4,677)	(3,177)	(1,563)
Tax basis step-up due to internal reorganization	0	15,321	0
Other	1,995	50	317
Total	$ (3,271)	$ (21,079)	$ (2,586)

Income Taxes - Components of De

Income Taxes - Components of Deferred Income Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Deferred revenue	$ 923	$ 739
Net operating losses	20,147	10,997
Accruals and reserves	5,513	5,679
Research & other credits	17,770	11,027
Intangibles	10,570	12,291
Operating lease liabilities	14,475	7,586
Effect of Section 163(j) on interest expense	6,696	4,046
Stock-based compensation	14,376	6,623
Other	0	353
Total deferred tax assets	90,470	59,341
Less valuation allowance	(44,046)	(19,683)	$ (1,138)	$ (7,304)
Net deferred tax assets	46,424	39,658
Deferred tax liabilities:
Operating lease right-of-use assets	(13,831)	(7,002)
Deferred commissions	(10,213)	(8,924)
Convertible senior notes	(16,990)	(20,459)
Effects of ASC 606 adoption	(4,343)	(8,819)
Other	(776)	(48)
Total deferred tax liabilities	(46,153)	(45,252)
Net deferred tax assets (liabilities)	$ 271
Net deferred tax assets (liabilities)		$ (5,594)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Net deferred tax liabilities		$ 5,594
Pre-tax unrecognized tax benefits related to stock-based compensation expense	$ 8,520	$ 7,556	$ 6,234	$ 5,794
Amount which would impact effective tax rate	5,300
Federal
Income Taxes [Line Items]
Income tax net operating loss carryforwards	73,000
State
Income Taxes [Line Items]
Income tax net operating loss carryforwards	$ 42,700

Income Taxes - Change in Valuat

Income Taxes - Change in Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes In Valuation Allowance [Roll Forward]
Beginning balance	$ 19,683	$ 1,138	$ 7,304
Increase (decrease) in valuation allowance	24,363	3,224	510
Ending balance	44,046	19,683	1,138
Cumulative Effect, Period of Adoption, Adjustment
Changes In Valuation Allowance [Roll Forward]
Increase (decrease) in valuation allowance	0	0	(6,676)
Internal Reorganization
Changes In Valuation Allowance [Roll Forward]
Increase (decrease) in valuation allowance	$ 0	$ 15,321	$ 0

Income Taxes - Schedule of Acti

Income Taxes - Schedule of Activity in Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 7,556	$ 6,234	$ 5,794
Additions based on tax position related to the current year	652	1,322	391
Additions for tax positions of prior years	312	0	49
Balance at end of year	$ 8,520	$ 7,556	$ 6,234

Basic and Diluted Net Income _2

Basic and Diluted Net Income (Loss) Per Share - Schedule of Computation of Net Income (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Numerator:
Net income (loss) attributable to common stockholders									$ (24,374)	$ 27,143	$ 28,020
Denominator:
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, basic (in shares)									66,058	63,424	60,829
Effect of dilutive securities:
Convertible senior notes (in shares)									0	1,975	409
Employee stock awards (in shares)									0	3,259	3,506
Contingently issuable shares (in shares)									0	3	0
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, diluted (in shares)									66,058	68,661	64,744
Net Income (loss) per share attributable to common stockholders, basic (in dollars per share)									$ (0.37)	$ 0.43	$ 0.46
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)	$ 0.32	$ 0.06	$ (0.53)	$ (0.24)	$ 0.44	$ (0.10)	$ (0.05)	$ 0.09	$ (0.37)	$ 0.40	$ 0.43

Basic and Diluted Net Income _3

Basic and Diluted Net Income (Loss) Per Share - Weighted-average Equivalent Shares Excluded From Diluted Net Income (Loss) per Share Calculation (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Aug. 31, 2019	Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share (in shares)	10,190	1,853	510
Stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share (in shares)	4,053	209	510
Convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share (in shares)	6,137	1,644	0
Convertible Senior Notes due 2023, 0.5% | Convertible Debt
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Initial Conversion Price					$ 44.33
Convertible Senior Notes due 2024 & 2026, 0.50%, 1.0% | Convertible Debt
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Initial Conversion Price				$ 189.36

Segment and Geographic Inform_3

Segment and Geographic Information Schedule of Long-lived Assets Classified By Geographic Location (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)Segment	Dec. 31, 2019USD ($)
Segment Reporting [Abstract]
Number of operating segments | Segment	1
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 103,153	$ 53,896
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	84,055	39,641
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	6,236	7,263
Other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 12,862	$ 6,992

Selected Quarterly Financial _3

Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 160,527	$ 129,717	$ 96,233	$ 108,831	$ 156,450	$ 103,397	$ 82,043	$ 76,020	$ 495,308	$ 417,910	$ 253,570
Gross profit	149,784	119,303	86,598	95,784	144,239	93,752	72,748	68,020	451,469	378,759	230,770
Income (loss) from operations	24,359	9,633	(17,794)	(20,105)	38,735	11,936	(8,288)	(4,402)	(3,907)	37,981	29,770
Net income (loss)	$ 22,035	$ 4,357	$ (35,293)	$ (15,473)	$ 30,688	$ (6,240)	$ (3,219)	$ 5,914	$ (24,374)	$ 27,143	$ 28,020
Diluted income (loss) per share (in dollars per share)	$ 0.32	$ 0.06	$ (0.53)	$ (0.24)	$ 0.44	$ (0.10)	$ (0.05)	$ 0.09	$ (0.37)	$ 0.40	$ 0.43