BlackLine (BL) 10-Q 10 May 22 2022 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2022	Apr. 29, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-37924
Entity Registrant Name	BlackLine, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-3354276
Entity Address, Address Line One	21300 Victory Boulevard
Entity Address, Address Line Two	12th Floor
Entity Address, City or Town	Woodland Hills
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91367
City Area Code	818
Local Phone Number	223-9008
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	BL
Security Exchange Name	NASDAQ
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
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		59,312,163
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001666134
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets, Current [Abstract]
Cash and cash equivalents	$ 365,522	$ 539,739
Marketable securities (amortized cost of $666,091 and $658,886 at March 31, 2022 and December 31, 2021, respectively)	666,122	658,964
Accounts receivable, net of allowances for credit losses of $3,013 and $2,923 at March 31, 2022 and December 31, 2021, respectively	117,554	125,130
Prepaid expenses and other current assets	22,278	23,855
Total current assets	1,171,476	1,347,688
Capitalized software development costs, net	25,489	23,547
Property and equipment, net	15,977	16,321
Intangible assets, net	106,433	36,195
Goodwill	443,861	289,710
Operating lease right-of-use assets	16,906	16,264
Other assets	90,088	87,853
Total assets	1,870,230	1,817,578
Current liabilities:
Accounts payable	16,285	7,471
Accrued expenses and other current liabilities	38,401	50,930
Deferred revenue	242,300	242,429
Finance lease liabilities, current	399	373
Operating lease liabilities, current	5,231	4,936
Contingent consideration, current	36,878	16,438
Total current liabilities	339,494	322,577
Finance lease liabilities, noncurrent	724	824
Operating lease liabilities, noncurrent	13,338	13,248
Convertible senior notes, net	1,380,152	1,114,239
Contingent consideration, noncurrent	37,985	4,294
Deferred tax liabilities, net	5,809	8,175
Deferred revenue, noncurrent	262	362
Other long-term liabilities	1,187	124
Total liabilities	1,778,951	1,463,843
Commitments and contingencies (Note 12)
Redeemable non-controlling interest (Note 3)	25,151	28,699
Stockholders' equity:
Common stock	593	590
Additional paid-in capital	318,297	625,883
Accumulated other comprehensive income	113	298
Accumulated deficit	(252,875)	(301,735)
Total stockholders' equity	66,128	325,036
Total liabilities, redeemable non-controlling interest, and stockholders' equity	$ 1,870,230	$ 1,817,578

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (PARENTHETICAL) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Amortized cost	$ 666,091	$ 658,886
Allowances for credit losses	$ 3,013	$ 2,923

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Total revenues	$ 120,236	$ 98,856
Cost of revenues
Total cost of revenues	30,673	21,890
Gross profit	89,563	76,966
Other income (expense)
Sales and marketing	60,027	48,429
Research and development	25,248	18,973
General and administrative	29,652	28,269
Total operating expenses	114,927	95,671
Loss from operations	(25,364)	(18,705)
Other income (expense)
Interest income	518	94
Interest expense	(1,447)	(14,804)
Other expense, net	(929)	(14,710)
Loss before income taxes	(26,293)	(33,415)
Benefit from income taxes	(12,862)	(191)
Net loss	(13,431)	(33,224)
Net loss attributable to non-controlling interest	(3)	(197)
Adjustment attributable to non-controlling interest	(3,417)	5,937
Net loss attributable to BlackLine, Inc.	$ (10,011)	$ (38,964)
Basic net loss per share attributable to BlackLine, Inc. (in usd per share)	$ (0.17)	$ (0.67)
Shares used to calculate basic net loss per share (in shares)	59,123	57,860
Diluted net loss per share attributable to BlackLine, Inc. (in usd per share)	$ (0.17)	$ (0.67)
Shares used to calculate diluted net loss per share (in shares)	59,123	57,860
Subscription and support
Revenue from Contract with Customer [Abstract]
Total revenues	$ 113,525	$ 91,655
Cost of revenues
Total cost of revenues	24,156	15,425
Professional services
Revenue from Contract with Customer [Abstract]
Total revenues	6,711	7,201
Cost of revenues
Total cost of revenues	$ 6,517	$ 6,465

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (13,431)	$ (33,224)
Other comprehensive income:
Net change in unrealized gains (losses) on marketable securities, net of tax of $0 for the quarters ended March 31, 2022 and 2021	(47)	24
Foreign currency translation	(266)	(210)
Other comprehensive loss	(313)	(186)
Comprehensive loss	(13,744)	(33,410)
Less comprehensive loss attributable to redeemable non-controlling interest:
Net loss attributable to redeemable non-controlling interest	(3)	(197)
Foreign currency translation attributable to redeemable non-controlling interest	(128)	(105)
Comprehensive loss attributable to redeemable non-controlling interest	(131)	(302)
Comprehensive loss attributable to BlackLine, Inc.	$ (13,613)	$ (33,108)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (UNAUDITED) (PARENTHETICAL) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net change in unrealized gain on marketable securities, tax	$ 0	$ 0

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Additional Paid-in Capital	Additional Paid-in CapitalCumulative Effect, Period of Adoption, Adjustment	Additional Paid-in CapitalCumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated DeficitCumulative Effect, Period of Adoption, Adjustment	Accumulated DeficitCumulative Effect, Period of Adoption, Adjusted Balance
Beginning Balance (in shares) at Dec. 31, 2020				57,682
Beginning Balance at Dec. 31, 2020	$ 422,070			$ 577	$ 622,768			$ 376	$ (201,651)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)				98
Stock option exercises	2,149			$ 1	2,148				0
Vesting of restricted stock units (in shares)				258
Vesting of restricted stock units	2			$ 2	0				0
Acquisition of common stock for tax withholding obligations	(5,134)				(5,134)				0
Stock-based compensation	15,203				15,203				0
Equity component of partial repurchase of 2024 convertible senior notes	(219,284)				(219,284)
Equity component of the 2026 convertible senior notes, net of issuance costs and tax	266,017				266,017
Purchase of capped calls	(102,350)				(102,350)
Other comprehensive income (loss)	(81)							(81)
Net loss attributable to BlackLine, Inc., including adjustment to redeemable non-controlling interest	(38,964)				(5,937)				(33,027)
Ending Balance (in shares) at Mar. 31, 2021				58,038
Ending Balance at Mar. 31, 2021	339,628			$ 580	573,431			295	(234,678)
Beginning Balance (in shares) at Dec. 31, 2021				58,984
Beginning Balance at Dec. 31, 2021	325,036	$ (262,130)	$ 62,906	$ 590	625,883	$ (324,418)	$ 301,465	298	(301,735)	$ 62,288	$ (239,447)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)				71
Stock option exercises	1,387			$ 1	1,386				0
Vesting of restricted stock units (in shares)				238
Vesting of restricted stock units	2			$ 2	0
Acquisition of common stock for tax withholding obligations	(4,187)				(4,187)				0
Stock-based compensation	16,216				16,216				0
Other comprehensive income (loss)	(185)							(185)
Net loss attributable to BlackLine, Inc., including adjustment to redeemable non-controlling interest	(10,011)				3,417				(13,428)
Ending Balance (in shares) at Mar. 31, 2022				59,293
Ending Balance at Mar. 31, 2022	$ 66,128			$ 593	$ 318,297			$ 113	$ (252,875)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2020-06 [Member]

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net loss attributable to BlackLine, Inc.	$ (10,011)	$ (38,964)
Net loss and adjustment attributable to redeemable non-controlling interest (Note 3)	(3,420)	5,740
Net loss	(13,431)	(33,224)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	9,147	6,542
Change in fair value of contingent consideration	(1,816)	7,702
Amortization of debt discount and issuance costs	1,357	7,651
Stock-based compensation	15,902	14,794
Loss on extinguishment of convertible senior notes	0	7,012
Noncash lease expense	1,445	1,025
Amortization (accretion) of purchase discounts on marketable securities, net	95	(33)
Net foreign currency (gains) losses	(182)	333
Deferred income taxes	(14,156)	7
Provision for (benefit from) credit losses	28	(8)
Changes in operating assets and liabilities:
Accounts receivable	9,459	20,980
Prepaid expenses and other current assets	2,576	(672)
Other assets	(2,094)	(3,456)
Accounts payable	6,555	652
Accrued expenses and other current liabilities	(13,815)	(2,075)
Deferred revenue	(460)	2,333
Operating lease liabilities	(1,440)	(1,058)
Other long-term liabilities	1,006	0
Net cash provided by operating activities	176	28,505
Cash flows from investing activities
Purchases of marketable securities	(335,550)	(308,937)
Proceeds from maturities of marketable securities	328,250	175,209
Capitalized software development costs	(4,657)	(4,021)
Purchases of property and equipment	(1,528)	(1,096)
Acquisition, net of cash acquired	(157,738)	0
Net cash used in investing activities	(171,223)	(138,845)
Cash flows from financing activities
Proceeds from issuance of convertible senior notes, net of issuance costs	0	1,129,106
Partial repurchase of convertible senior notes	0	(432,230)
Purchase of capped calls related to convertible senior notes	0	(102,350)
Principal payments under finance lease obligations	(106)	0
Proceeds from exercises of stock options	1,389	2,151
Acquisition of common stock for tax withholding obligations	(4,187)	(5,134)
Financed purchases of property and equipment	0	(169)
Net cash provided by (used in) financing activities	(2,904)	591,374
Effect of foreign currency exchange rate changes on cash, cash equivalents, and restricted cash	(271)	(210)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(174,222)	480,824
Cash, cash equivalents, and restricted cash, beginning of period	539,991	367,913
Cash, cash equivalents, and restricted cash, end of period	365,769	848,737
Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheets
Cash and cash equivalents at end of period	365,522	848,268
Restricted cash included within prepaid expenses and other current assets at end of period	0	208
Restricted cash included within other assets at end of period	247	261
Total cash, cash equivalents, and restricted cash at end of period shown in the consolidated statements of cash flows	365,769	848,737
Non-cash financing and investing activities
Adjustment for adoption of ASU 2020-06	262,130	0
Estimated fair value of contingent consideration	55,947	0
Stock-based compensation capitalized for software development	382	409
Capitalized software development costs included in accounts payable and accrued expenses and other current liabilities at end of period	995	365
Purchases of property and equipment included in accounts payable and accrued expenses and other current liabilities at end of period	454	451
Debt issuance costs included in accrued expenses and additional paid-in capital at end of period	$ 0	$ 312

Company Overview

Company Overview	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Company Overview	Company Overview BlackLine, Inc. and its subsidiaries (the “Company” or “BlackLine”) provide financial accounting close solutions delivered primarily as Software as a Service (“SaaS”). The Company’s solutions enable its customers to address various aspects of their financial close process including account reconciliations, variance analysis of account balances, journal entry capabilities, and certain types of data matching capabilities. On January 26, 2022, the Company acquired FourQ Systems, Inc. (“FourQ”), hereinafter referred to as the “FourQ Acquisition.” The primary purpose of the FourQ Acquisition was to enhance our existing intercompany accounting automation capabilities by driving end-to-end automation of traditionally manual intercompany accounting processes. The Company is headquartered in Woodland Hills, California and has offices in Pleasanton, California, as well as in Australia, Canada, France, Germany, Japan, the Netherlands, Poland, Romania, Singapore, and the United Kingdom.

Basis of Presentation, Signific

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements	Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements The accompanying unaudited condensed consolidated financial statements were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been condensed or omitted. Accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes included in the Annual Report on Form 10-K for the fiscal year ended December 31, 2021, which was filed with the Securities and Exchange Commission (“SEC”) on February 25, 2022 and as amended in the Annual Report on Form 10-K/A filed on March 24, 2022. The unaudited condensed consolidated financial statements are unaudited and have been prepared on a basis consistent with that used to prepare the audited annual consolidated financial statements and include, in the opinion of management, all adjustments, consisting of normal and recurring items, necessary for the fair statement of the condensed consolidated financial statements. The unaudited condensed consolidated balance sheet at December 31, 2021 was derived from audited financial statements, but does not include all disclosures required by GAAP. The operating results for the quarter ended March 31, 2022 are not necessarily indicative of the results expected for the full year ending December 31, 2022. Use of estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. The extent to which COVID-19 impacts the Company’s business and financial results will depend on numerous continuously evolving factors including, but not limited to, the magnitude and duration of COVID-19, including resurgences; the impact on the Company’s employees; the extent to which it will impact worldwide macroeconomic conditions, as well as variability in such recovery across different geographies, industries, and markets; and governmental and business reactions to the pandemic. The Company assessed certain accounting matters that generally require consideration of forecasted financial information in context with the information reasonably available to the Company and the unknown future impacts of COVID-19 at March 31, 2022 and through the date of this report. The accounting matters assessed included, but were not limited to, the Company’s allowance for credit losses and doubtful accounts, and the carrying value of goodwill and other long-lived assets. While there was not a material impact to the Company’s condensed consolidated financial statements at and for the quarter ended March 31, 2022, the Company’s future assessment of the magnitude and duration of COVID-19 and other factors could result in material impacts to the Company’s condensed consolidated financial statements in future reporting periods. Significant accounting policies The Company’s significant accounting policies are detailed in “Note 2 - Significant Accounting Policies" of the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. There have been no material changes to the Company’s significant accounting policies except for the adoption of ASU No. 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity , as discussed below and the accounting for acquired deferred tax liabilities in a business combination as discussed in Note 10. Recently-adopted accounting pronouncements In August 2020, the FASB issued ASU No. 2020-06. This standard eliminates the beneficial conversion and cash conversion accounting models for convertible instruments. It also amends the accounting for certain contracts in an entity’s own equity that are currently accounted for as derivatives because of specific settlement provisions. In addition, the new guidance modifies how particular convertible instruments and certain contracts that may be settled in cash or shares impact the diluted EPS computation. For public business entities, it is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years using the fully retrospective or modified retrospective method. The Company adopted the provisions of the new standard effective January 1, 2022 using the modified retrospective method, which resulted in an adjustment of $324.4 million, net of tax of $2.4 million to reclassify the remaining balance of the conversion feature recorded in additional paid in capital to convertible debt for $262.1 million and retained earnings for $62.3 million. Accordingly, the Company no longer carries an equity component of the convertible notes. In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805), Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. This standard addresses diversity in practice and inconsistency related to recognition of an acquired contract liability, and payment terms and their effect on subsequent revenue recognized by the acquirer. For public business entities, it is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Entities should apply the provisions of the new standard prospectively to business combinations occurring on or after the effective date of the standard. Early adoption is permitted, including adoption in an interim period. The Company adopted the provisions of the new standard effective January 1, 2022. The adoption of this guidance did not have a material impact on the Company’s condensed consolidated financial statements. Recently-issued accounting pronouncements not yet adopted In January 2022, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2022-01, Derivatives and Hedging, which expands the scope of the portfolio layer method to include non-prepayable financial assets, and provides additional guidance on the accounting for and disclosure of hedge basis adjustments that are applicable to the portfolio layer method. For public business entities, it is effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. The Company has not used derivative instruments to mitigate the impact of our market risk exposures, has not adopted the provisions of the new standard and does not expect it to have a material impact on the Company’s consolidated financial statements.

Redeemable Non-Controlling Inte

Redeemable Non-Controlling Interest	3 Months Ended
	Mar. 31, 2022
Equity Method Investments and Joint Ventures [Abstract]
Redeemable Non-Controlling Interest	Redeemable Non-Controlling Interest In September 2018, the Company entered into an agreement with Japanese Cloud Computing and M30 LLC (the “Investors”) to engage in the investment, organization, management, and operation of a Japanese subsidiary (“BlackLine K.K.”) of the Company that is focused on the sale of the Company's products in Japan. In October 2018, the Company initially contributed approximately $4.5 million in cash in exchange for 51% of the outstanding common stock of BlackLine K.K. As the Company controls a majority stake in BlackLine K.K., the entity has been consolidated. All of the common stock held by the Investors is callable by the Company or puttable by the Investors upon certain contingent events. Should the call or put option be exercised, the redemption value will be determined based upon a prescribed formula derived from the discrete revenues of BlackLine K.K. and the Company and may be settled, at the Company’s discretion, with Company stock or cash. As a result of the put right available to the Investors in the future, the redeemable non-controlling interest in BlackLine K.K. is classified outside of permanent equity in the Company’s unaudited condensed consolidated balance sheets, and the balance is reported at the greater of the initial carrying amount adjusted for the redeemable non-controlling interests share of earnings, or its estimated redemption value. The resulting changes in the estimated redemption amount are recorded within retained earnings or, in the absence of retained earnings, additional paid-in-capital. The following table summarizes the activity in the redeemable non-controlling interest for the periods indicated below: Quarter Ended March 31, 2022 2021 Balance at beginning of period $ 28,699 $ 12,524 Net loss attributable to redeemable non-controlling interest (excluding adjustment to non-controlling interest) (3) (197) Foreign currency translation (128) (105) Adjustment to redeemable non-controlling interest (3,417) 5,937 Balance at end of period $ 25,151 $ 18,159

Business Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2022
Business Combination and Asset Acquisition [Abstract]
Business Combinations	Business Combinations Acquisition of FourQ On January 26, 2022 the Company completed the FourQ acquisition for cash consideration of $160.2 million payable at the closing of the acquisition with additional cash payments of up to $73.2 million payable upon certain earnout conditions being met. The FourQ Acquisition enhances the Company's existing intercompany accounting automation capabilities by driving end-to-end automation of traditionally manual intercompany accounting processes. Transaction-related costs, which include, but are not limited to, accounting, legal, and advisory fees related to the transaction, incurred by the Company totaling approximately $3.1 million were expensed as incurred during the quarter ended March 31, 2022. The contingent consideration was classified as a liability and included in contingent consideration on the accompanying condensed consolidated balance sheet at March 31, 2022. It will be remeasured on a recurring basis at fair value. To estimate the fair value of the contingent consideration liability, management utilized a Monte Carlo simulation model to value the earnout based on the likelihood of reaching firm-specific targets. Significant inputs used in the fair value measurement of contingent consideration are the amount and timing of new and incremental combined bookings from FourQ and BlackLine, and revenues from a specified FourQ customer over a three-year period subsequent to the acquisition date, as well as the discount rate. At March 31, 2022, the fair value of the contingent consideration liability was $55.9 million. The Company accounted for the transaction as a business combination using the acquisition method of accounting. The total purchase price was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their respective estimated fair values on the acquisition date. The purchase price allocation is preliminary. The purchase consideration and major classes of assets and liabilities to which the Company allocated the total fair value of purchase consideration of $214.2 million were as follows (in thousands): Cash consideration $ 160,224 Post-acquisition working capital adjustment (635) Contingent consideration 55,947 Less: One-time expense related to accelerated vesting (1,322) Purchase consideration $ 214,214 Cash and cash equivalents $ 1,164 Accounts receivable, net 1,853 Prepaid expenses and other current assets 410 Other assets 143 Property and equipment 659 Intangible assets 74,400 Goodwill 154,151 Accounts payable (1,537) Accrued liabilities (2,585) Deferred revenue (231) Deferred tax liabilities, net (14,213) Total consideration $ 214,214 The Company believes the amount of goodwill resulting from the acquisition is primarily attributable to increased offerings to customers, and enhanced opportunities for growth and innovation. The goodwill resulting from the acquisition is not tax deductible. To determine the estimated fair value of intangible assets acquired, the Company engaged a third-party valuation specialist to assist management. All estimates, key assumptions, and forecasts were either provided by, or reviewed by the Company. While the Company chose to utilize a third-party valuation specialist for assistance, the fair value analysis and related valuations reflect the conclusions of the Company and not those of any third party. The fair value measurements of the intangible assets were based primarily on significant unobservable inputs and thus represent a Level 3 measurement as defined in ASC 820. The acquired intangible asset categories, fair value, and amortization periods, were as follows: Amortization Fair Value Developed technology 7 $ 64,900 Customer relationships 3 9,500 $ 74,400 The weighted average lives of intangible assets at the acquisition date was 6.5 years. The identified intangible assets, developed technology and customer relationships, were valued as follows: Developed technology – The Company valued the finite-lived developed technology using the multi-period excess earnings model ("MPEEM") under the income approach. This method estimates an intangible asset’s value based on the present value of the incremental after-tax cash flows attributable to the intangible asset. The Company applied judgment which involves the use of significant assumptions with respect to the discount rate, obsolescence rate, revenue forecasts, research and development for future technology, and EBITDA forecasts. Customer relationships – The Company valued the finite-lived customer relationships using the differential cash flow (with-and-without) model. This method assumes that the value of the intangible asset is equal to the difference between the present value of the prospective cash flows with the intangible asset in place and the present value of the prospective cash flows without the intangible asset. The Company applied judgment, which involved the use of significant assumptions with respect to the discount rate and the customer ramp-up rate. The revenue and earnings of the acquired business were included in the Company’s results since the acquisition date and are not material to the Company’s consolidated financial results for the quarter ended March 31, 2022. Pro forma revenues and results of operations for this acquisition have not been presented as the impact on the Company’s consolidated financial statements would be immaterial.

Intangible Assets and Goodwill

Intangible Assets and Goodwill	3 Months Ended
	Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets and Goodwill	Intangible Assets and Goodwill The carrying value of intangible assets was as follows (in thousands): March 31, 2022 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade name $ 15,977 $ (13,716) $ 2,261 Developed technology 129,258 (45,484) 83,774 Customer relationships 26,089 (7,395) 18,694 Defensive patent 2,333 (629) 1,704 $ 173,657 $ (67,224) $ 106,433 December 31, 2021 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade name $ 15,977 $ (13,317) $ 2,660 Developed technology 64,358 (43,148) 21,210 Customer relationships 16,589 (6,046) 10,543 Defensive patent 2,333 (551) 1,782 $ 99,257 $ (63,062) $ 36,195 The following table represents the changes in goodwill (in thousands): Balance at December 31, 2021 $ 289,710 Additions from acquisitions 154,151 Balance at March 31, 2022 $ 443,861

Balance Sheet Components

Balance Sheet Components	3 Months Ended
	Mar. 31, 2022
Balance Sheet Related Disclosures [Abstract]
Balance Sheet Components	Balance Sheet Components Investments in Marketable Securities Investments in marketable securities presented within current assets on the condensed consolidated balance sheets consisted of the following: March 31, 2022 Amortized Gross Gross Fair Value (in thousands) Marketable securities U.S. treasury securities $ 164,845 $ 4 $ (209) $ 164,640 Corporate bonds 75,694 528 (18) 76,204 Commercial paper 425,552 — (274) 425,278 $ 666,091 $ 532 $ (501) $ 666,122 December 31, 2021 Amortized Gross Gross Fair Value (in thousands) Marketable securities Corporate bonds $ 74,144 346 (10) $ 74,480 Commercial paper 584,742 — (258) 584,484 $ 658,886 $ 346 $ (268) $ 658,964 Net gains and losses related to maturities of marketable securities that were reclassified from accumulated other comprehensive loss to earnings, and included in general and administrative expenses in the accompanying condensed consolidated statements of operations, were immaterial for the quarters ended March 31, 2022 and 2021. Net gains and losses are determined using the specific identification method. During the quarter ended March 31, 2022 and 2021, there were no realized gains or losses related to sales of marketable securities recognized in the Company's accompanying condensed consolidated statements of operations. Marketable securities in a continuous loss position for less than 12 months had an estimated fair value of $406.1 million and $379.7 million, and $0.5 million and $0.3 million of unrealized losses at March 31, 2022 and December 31, 2021, respectively. At March 31, 2022, there were no marketable securities in a continuous loss position for greater than 12 months. The Company's marketable securities are considered to be of high credit quality and accordingly, there was no allowance for credit losses related to marketable securities as of March 31, 2022 or December 31, 2021. The Company’s marketable securities as of March 31, 2022 have a contractual maturity of less than 1 year. Other Assets Other assets consisted of the following (in thousands): March 31, December 31, Deferred customer contract acquisition costs $ 81,880 $ 79,961 Restricted cash 247 252 Capitalized software implementation costs 4,257 7,023 Other assets 3,704 617 $ 90,088 $ 87,853 Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities were comprised of the following (in thousands): March 31, December 31, Accrued salaries and employee benefits $ 23,242 $ 32,156 Accrued income and other taxes payable 8,288 9,770 Other accrued expenses and current liabilities 6,871 9,004 $ 38,401 $ 50,930

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The following table summarizes the Company’s financial assets and liabilities measured at fair value on a recurring basis by level, within the fair value hierarchy. Financial assets and financial liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement (in thousands): March 31, 2022 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 110,937 $ — $ — $ 110,937 U.S. treasury securities 10,497 — — 10,497 U.S. government agencies — 14,985 — 14,985 Commercial paper — 90,437 — 90,437 Marketable securities U.S. treasury securities 164,641 — — 164,641 Corporate bonds — 76,203 — 76,203 Commercial paper — 425,278 — 425,278 Total assets $ 286,075 $ 606,903 $ — $ 892,978 Liabilities Contingent consideration $ — $ — $ 74,863 $ 74,863 Total liabilities $ — $ — $ 74,863 $ 74,863 December 31, 2021 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 432,110 $ — $ — $ 432,110 Marketable securities Corporate bonds — 74,480 — 74,480 Commercial paper — 584,484 — 584,484 Total assets $ 432,110 $ 658,964 $ — $ 1,091,074 Liabilities Contingent consideration $ — $ — $ 20,732 $ 20,732 Total liabilities $ — $ — $ 20,732 $ 20,732 The following table summarizes the changes in the contingent consideration liability (in thousands): Quarter Ended March 31, 2022 2021 Beginning fair value $ 20,732 $ 23,490 Additions in the period 55,947 — Change in fair value (1,816) 7,702 Ending fair value $ 74,863 $ 31,192 The fair value of the contingent consideration related to the 2013 Acquisition is determined by discounting estimated future taxable income. The significant inputs used in the fair value measurement of the contingent consideration are the timing and amount of taxable income in any given period and determining an appropriate discount rate, which are not based on observable market data and consider the risks associated with the forecasted taxable income. Significant changes in the estimated future taxable income and the periods in which they are generated would significantly impact the fair value of the contingent consideration liability. To determine the fair value of the contingent consideration related to the Rimilia Acquisition, management utilized a Monte Carlo simulation model to value the earnout based on the likelihood of reaching firm-specific targets. Significant inputs used in the fair value measurement of the contingent consideration are the amount and timing of Rimilia Annual Recurring Revenue ("ARR") in each year over a two-year period subsequent to the acquisition, as well as the appropriate discount rate, which considers the risk associated with the forecasted Rimilia ARR. Changes in the significant inputs used in the fair value measurement, specifically a change to Rimilia ARR can significantly impact the fair value of the contingent consideration liability. At March 31, 2022, the fair value of the contingent consideration liability was $12.5 million. To determine the fair value of the contingent consideration related to the FourQ Acquisition, management utilized a Monte Carlo simulation model to value the earnout based on the likelihood of reaching firm-specific targets. Significant inputs used in the fair value measurement of contingent consideration are the amount and timing of new and incremental combined bookings from FourQ and BlackLine, and revenues from a specified FourQ customer over a three-year period subsequent to the acquisition date, as well as the discount rate. At March 31, 2022, the fair value of the contingent consideration liability was $55.9 million. Changes in the fair value of contingent consideration are recorded as general and administrative expenses in the unaudited condensed consolidated statements of operations.

Convertible Senior Notes

Convertible Senior Notes	3 Months Ended
	Mar. 31, 2022
Debt Disclosure [Abstract]
Convertible Senior Notes	Convertible Senior Notes 2024 Notes The 2024 Notes consisted of the following (in thousands): March 31, December 31, Liability: Principal $ 250,000 $ 250,000 Unamortized debt discount — (31,562) Unamortized debt issuance costs (3,044) (2,938) Net carrying amount $ 246,956 $ 215,500 Carrying amount of the equity component $ — $ 55,615 The Company carries the 2024 Notes at face value less unamortized issuance costs on the accompanying condensed consolidated balance sheets and presents the fair value for disclosure purposes only. The estimated fair value was determined based on the actual bids and offers of the 2024 Notes in an over-the-counter market on the last trading day of the period. The estimated fair value of the 2024 Notes, based on a market approach at March 31, 2022, was approximately $307.5 million, which represents a Level 2 valuation. During the quarter ended March 31, 2022, the Company recognized $0.3 million of interest expense related to the amortization of issuance costs and $0.1 million of coupon interest expense. During the quarter ended March 31, 2021, the Company recognized $5.3 million of interest expense related to the amortization of debt discount and issuance costs and $0.1 million of coupon interest expense. At March 31, 2022, the remaining life of the 2024 Notes was approximately 28 months. The 2024 Notes were convertible at December 31, 2021. As a result, holders had the option to convert their Notes at any time during the quarter ended March 31, 2022. The Company did not receive any conversion requests for the 2024 Notes through March 31, 2022. It is the Company’s current intent to settle conversions of the Notes through “combination settlement”, which involves repayment of the principal portion in cash and any excess of the conversion value over the principal amount in shares of its common stock. There have been no changes to the condition of the 2024 Capped Calls since December 31, 2021, and the Capped Calls are still outstanding as of March 31, 2022. 2026 Notes The 2026 Notes consisted of the following (in thousands): March 31, December 31, Liability: Principal $ 1,150,000 $ 1,150,000 Unamortized debt discount — (237,096) Unamortized debt issuance costs (16,804) (14,165) Net carrying amount $ 1,133,196 $ 898,739 Carrying amount of the equity component $ — $ 271,229 The Company carries the 2026 Notes at face value less unamortized issuance costs on the accompanying condensed consolidated balance sheets and presents the fair value for disclosure purposes only. The estimated fair value was determined based on the actual bids and offers of the 2026 Notes in an over-the-counter market on the last trading day of the period. The estimated fair value of the 2026 Notes, based on a market approach at March 31, 2022, was approximately $975.3 million, which represents a Level 2 valuation. During the quarter ended March 31, 2022, the Company recognized $1.0 million of interest expense related to the amortization of issuance costs. At March 31, 2022, the remaining life of the 2026 Notes was approximately 48 months. The 2026 Notes were not convertible at March 31, 2022. It is the Company’s current intent to settle conversions of the Notes through “combination settlement”, which involves repayment of the principal portion in cash and any excess of the conversion value over the principal amount in shares of its common stock. There have been no changes to the condition of the 2026 Capped Calls since December 31, 2021, and the Capped Calls are still outstanding as of March 31, 2022.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation —From time to time, the Company may become subject to legal proceedings, claims and litigation arising in the ordinary course of business. The Company is not currently a party to any legal proceedings, nor is it aware of any pending or threatened litigation that would have a material adverse effect on the Company’s business, operating results, cash flows, or financial condition should such litigation be resolved unfavorably. Indemnification —In the ordinary course of business, the Company may provide indemnification of varying scope and terms to customers, vendors, investors, directors, and officers with respect to certain matters, including, but not limited to, losses arising out of its breach of such agreements, services to be provided by the Company, or from intellectual property infringement claims made by third parties. These indemnification provisions may survive termination of the underlying agreement and the maximum potential amount of future payments the Company could be required to make under these indemnification provisions may not be subject to maximum loss clauses. The maximum potential amount of future payments the Company could be required to make under these indemnification provisions is indeterminable. The Company has never paid a material claim, nor has it been sued in connection with these indemnification arrangements. At March 31, 2022 and December 31, 2021, the Company has not accrued a liability for these indemnification arrangements because the likelihood of incurring a payment obligation, if any, in connection with these indemnification arrangements was not probable or reasonably estimable.

Equity Awards

Equity Awards	3 Months Ended
	Mar. 31, 2022
Share-based Payment Arrangement [Abstract]
Equity Awards	Equity Awards Stock-based compensation expense Stock-based compensation expense was as follows (in thousands): Quarter Ended March 31, 2022 2021 Cost of revenues $ 1,714 $ 1,750 Sales and marketing 5,924 5,251 Research and development 2,897 2,611 General and administrative 5,367 5,182 $ 15,902 $ 14,794 For the quarters ended March 31, 2022 and 2021, stock-based compensation capitalized as an asset was $0.4 million and $0.4 million, respectively. Stock options The following table summarizes activity for awards that contain service-only vesting conditions (in thousands): Outstanding at December 31, 2021 2,739 Granted — Exercised (74) Forfeited/canceled (8) Nonvested at March 31, 2022 2,657 Restricted stock units The following table summarizes activity for restricted stock units (in thousands): Nonvested at December 31, 2021 1,503 Granted 114 Vested (292) Forfeited/canceled (54) Outstanding at March 31, 2022 1,271

Unearned Revenue and Performanc

Unearned Revenue and Performance Obligations	3 Months Ended
	Mar. 31, 2022
Unearned Revenue And Performance Obligations [Abstract]
Unearned Revenue and Performance Obligations	Unearned Revenue and Performance Obligations Revenue totaling $98.3 million and $79.4 million was recognized during the quarters ended March 31, 2022 and 2021, respectively, that was previously included in the deferred revenue balance at December 31, 2021 and 2020, respectively. Contracted not recognized revenue was $661.3 million at March 31, 2022, of which the Company expects to recognize approximately 56% over the next 12 months and the remainder thereafter.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes In determining quarterly provisions for income taxes, the Company uses the annual estimated effective tax rate applied to the actual year-to-date loss, adjusted for discrete items arising in that quarter. The Company’s annual estimated effective tax rate differs from the U.S. federal statutory rate of 21% primarily as a result of state taxes, foreign taxes, and changes in the Company’s valuation allowance for domestic income taxes. For the quarters ended March 31, 2022 and 2021, the Company recorded $12.9 million and $0.2 million in income tax benefit, respectively. The increase in income tax benefit for the quarter ended March 31, 2022, compared to the quarter ended March 31, 2021, resulted primarily from a partial release of $14.0 million of existing valuation allowance as net deferred tax liabilities acquired from FourQ are a source of taxable income to support recognition of existing BlackLine deferred tax assets. The increase was partially offset by the non-recognition of 2022 tax benefits associated with certain UK operations and changes in the mix of profitable foreign jurisdictions. For the quarters ended March 31, 2022 and 2021, the Company continued to maintain a full valuation allowance on its U.S. federal and state net deferred tax assets as it was more likely than not that those deferred tax assets will not be realized.

Net Loss per Share

Net Loss per Share	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Net Loss per Share	Net Loss per Share The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share amounts): Quarter Ended March 31, 2022 2021 Numerator: Net loss attributable to BlackLine, Inc. $ (10,011) $ (38,964) Denominator: Weighted average shares 59,123 57,860 Add: Dilutive effect of securities — — Shares used to calculate diluted net loss per share 59,123 57,860 Basic net loss per share attributable to BlackLine, Inc. $ (0.17) $ (0.67) Diluted net loss per share attributable to BlackLine, Inc. $ (0.17) $ (0.67) The following potentially dilutive shares were excluded from the calculation of diluted net loss per share attributable to common stockholders because they were anti-dilutive (in thousands): Quarter Ended March 31, 2022 2021 Stock options with service-only vesting conditions 2,657 3,021 Restricted stock units 1,271 2,107 Total shares excluded from net loss per share 3,928 5,128

Geographic Information

Geographic Information	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Geographic Information	Geographic Information The Company disaggregates its revenue from contracts with customers by geographic location, as it believes it best depicts how the nature, amount, timing, and uncertainty of its revenues and cash flows are affected by economic factors. The following table sets forth the Company’s revenues by geographic region (in thousands): Quarter Ended March 31, 2022 2021 United States $ 85,682 $ 72,041 International 34,554 26,815 $ 120,236 $ 98,856

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On April 4, 2022, the Compensation Committee of the Board of Directors of BlackLine, Inc. approved restricted stock unit grants totaling 0.9 million shares. Each restricted stock unit entitles the recipient to receive one share of common stock upon vesting of the award. The majority of the restricted stock units will vest as to one-fourth of the total number of units awarded on the first anniversary of February 20, 2022 and quarterly thereafter for 12 consecutive quarters. On April 4, 2022, the Compensation Committee of the Board of Directors of BlackLine, Inc. also approved performance stock unit grants totaling 0.2 million shares at target. Once specified performance metrics are met, each performance stock unit entitles the recipient to receive one share of common stock upon vesting of the award. three

Basis of Presentation, Signif_2

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Use of Estimates	Use of estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. The extent to which COVID-19 impacts the Company’s business and financial results will depend on numerous continuously evolving factors including, but not limited to, the magnitude and duration of COVID-19, including resurgences; the impact on the Company’s employees; the extent to which it will impact worldwide macroeconomic conditions, as well as variability in such recovery across different geographies, industries, and markets; and governmental and business reactions to the pandemic. The Company assessed certain accounting matters that generally require consideration of forecasted financial information in context with the information reasonably available to the Company and the unknown future impacts of COVID-19 at March 31, 2022 and through the date of this report. The accounting matters assessed included, but were not limited to, the Company’s allowance for credit losses and doubtful accounts, and the carrying value of goodwill and other long-lived assets. While there was not a material impact to the Company’s condensed consolidated financial statements at and for the quarter ended March 31, 2022, the Company’s future assessment of the magnitude and duration of COVID-19 and other factors could result in material impacts to the Company’s condensed consolidated financial statements in future reporting periods.
Recently-issued Accounting Pronouncements Not Yet Adopted	Recently-adopted accounting pronouncements In August 2020, the FASB issued ASU No. 2020-06. This standard eliminates the beneficial conversion and cash conversion accounting models for convertible instruments. It also amends the accounting for certain contracts in an entity’s own equity that are currently accounted for as derivatives because of specific settlement provisions. In addition, the new guidance modifies how particular convertible instruments and certain contracts that may be settled in cash or shares impact the diluted EPS computation. For public business entities, it is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years using the fully retrospective or modified retrospective method. The Company adopted the provisions of the new standard effective January 1, 2022 using the modified retrospective method, which resulted in an adjustment of $324.4 million, net of tax of $2.4 million to reclassify the remaining balance of the conversion feature recorded in additional paid in capital to convertible debt for $262.1 million and retained earnings for $62.3 million. Accordingly, the Company no longer carries an equity component of the convertible notes. In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805), Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. This standard addresses diversity in practice and inconsistency related to recognition of an acquired contract liability, and payment terms and their effect on subsequent revenue recognized by the acquirer. For public business entities, it is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Entities should apply the provisions of the new standard prospectively to business combinations occurring on or after the effective date of the standard. Early adoption is permitted, including adoption in an interim period. The Company adopted the provisions of the new standard effective January 1, 2022. The adoption of this guidance did not have a material impact on the Company’s condensed consolidated financial statements. Recently-issued accounting pronouncements not yet adopted In January 2022, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2022-01, Derivatives and Hedging, which expands the scope of the portfolio layer method to include non-prepayable financial assets, and provides additional guidance on the accounting for and disclosure of hedge basis adjustments that are applicable to the portfolio layer method. For public business entities, it is effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. The Company has not used derivative instruments to mitigate the impact of our market risk exposures, has not adopted the provisions of the new standard and does not expect it to have a material impact on the Company’s consolidated financial statements.

Redeemable Non-Controlling In_2

Redeemable Non-Controlling Interest (Tables)	3 Months Ended
	Mar. 31, 2022
Equity Method Investments and Joint Ventures [Abstract]
Summary of Redeemable Non-Controlling Interest	The following table summarizes the activity in the redeemable non-controlling interest for the periods indicated below: Quarter Ended March 31, 2022 2021 Balance at beginning of period $ 28,699 $ 12,524 Net loss attributable to redeemable non-controlling interest (excluding adjustment to non-controlling interest) (3) (197) Foreign currency translation (128) (105) Adjustment to redeemable non-controlling interest (3,417) 5,937 Balance at end of period $ 25,151 $ 18,159

Business Combinations (Tables)

Business Combinations (Tables)	3 Months Ended
	Mar. 31, 2022
Business Combination and Asset Acquisition [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The purchase consideration and major classes of assets and liabilities to which the Company allocated the total fair value of purchase consideration of $214.2 million were as follows (in thousands): Cash consideration $ 160,224 Post-acquisition working capital adjustment (635) Contingent consideration 55,947 Less: One-time expense related to accelerated vesting (1,322) Purchase consideration $ 214,214 Cash and cash equivalents $ 1,164 Accounts receivable, net 1,853 Prepaid expenses and other current assets 410 Other assets 143 Property and equipment 659 Intangible assets 74,400 Goodwill 154,151 Accounts payable (1,537) Accrued liabilities (2,585) Deferred revenue (231) Deferred tax liabilities, net (14,213) Total consideration $ 214,214
Acquired Intangible Asset Categories, Fair Value and Amortization Periods	The acquired intangible asset categories, fair value, and amortization periods, were as follows: Amortization Fair Value Developed technology 7 $ 64,900 Customer relationships 3 9,500 $ 74,400

Intangible Assets and Goodwill

Intangible Assets and Goodwill (Tables)	3 Months Ended
	Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Carrying Value of Intangible Assets	The carrying value of intangible assets was as follows (in thousands): March 31, 2022 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade name $ 15,977 $ (13,716) $ 2,261 Developed technology 129,258 (45,484) 83,774 Customer relationships 26,089 (7,395) 18,694 Defensive patent 2,333 (629) 1,704 $ 173,657 $ (67,224) $ 106,433 December 31, 2021 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Trade name $ 15,977 $ (13,317) $ 2,660 Developed technology 64,358 (43,148) 21,210 Customer relationships 16,589 (6,046) 10,543 Defensive patent 2,333 (551) 1,782 $ 99,257 $ (63,062) $ 36,195
Schedule of Changes in Goodwill	The following table represents the changes in goodwill (in thousands): Balance at December 31, 2021 $ 289,710 Additions from acquisitions 154,151 Balance at March 31, 2022 $ 443,861

Balance Sheet Components (Table

Balance Sheet Components (Tables)	3 Months Ended
	Mar. 31, 2022
Balance Sheet Related Disclosures [Abstract]
Schedule of Investments in Marketable Securities	Investments in marketable securities presented within current assets on the condensed consolidated balance sheets consisted of the following: March 31, 2022 Amortized Gross Gross Fair Value (in thousands) Marketable securities U.S. treasury securities $ 164,845 $ 4 $ (209) $ 164,640 Corporate bonds 75,694 528 (18) 76,204 Commercial paper 425,552 — (274) 425,278 $ 666,091 $ 532 $ (501) $ 666,122 December 31, 2021 Amortized Gross Gross Fair Value (in thousands) Marketable securities Corporate bonds $ 74,144 346 (10) $ 74,480 Commercial paper 584,742 — (258) 584,484 $ 658,886 $ 346 $ (268) $ 658,964
Schedule of Other Assets	Other assets consisted of the following (in thousands): March 31, December 31, Deferred customer contract acquisition costs $ 81,880 $ 79,961 Restricted cash 247 252 Capitalized software implementation costs 4,257 7,023 Other assets 3,704 617 $ 90,088 $ 87,853
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities were comprised of the following (in thousands): March 31, December 31, Accrued salaries and employee benefits $ 23,242 $ 32,156 Accrued income and other taxes payable 8,288 9,770 Other accrued expenses and current liabilities 6,871 9,004 $ 38,401 $ 50,930

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table summarizes the Company’s financial assets and liabilities measured at fair value on a recurring basis by level, within the fair value hierarchy. Financial assets and financial liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement (in thousands): March 31, 2022 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 110,937 $ — $ — $ 110,937 U.S. treasury securities 10,497 — — 10,497 U.S. government agencies — 14,985 — 14,985 Commercial paper — 90,437 — 90,437 Marketable securities U.S. treasury securities 164,641 — — 164,641 Corporate bonds — 76,203 — 76,203 Commercial paper — 425,278 — 425,278 Total assets $ 286,075 $ 606,903 $ — $ 892,978 Liabilities Contingent consideration $ — $ — $ 74,863 $ 74,863 Total liabilities $ — $ — $ 74,863 $ 74,863 December 31, 2021 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 432,110 $ — $ — $ 432,110 Marketable securities Corporate bonds — 74,480 — 74,480 Commercial paper — 584,484 — 584,484 Total assets $ 432,110 $ 658,964 $ — $ 1,091,074 Liabilities Contingent consideration $ — $ — $ 20,732 $ 20,732 Total liabilities $ — $ — $ 20,732 $ 20,732
Summary of Changes in Common Stock Warrant Liability and Contingent Consideration Liability	The following table summarizes the changes in the contingent consideration liability (in thousands): Quarter Ended March 31, 2022 2021 Beginning fair value $ 20,732 $ 23,490 Additions in the period 55,947 — Change in fair value (1,816) 7,702 Ending fair value $ 74,863 $ 31,192

Convertible Senior Notes (Table

Convertible Senior Notes (Tables)	3 Months Ended
	Mar. 31, 2022
Debt Disclosure [Abstract]
Summary of Notes	The 2024 Notes consisted of the following (in thousands): March 31, December 31, Liability: Principal $ 250,000 $ 250,000 Unamortized debt discount — (31,562) Unamortized debt issuance costs (3,044) (2,938) Net carrying amount $ 246,956 $ 215,500 Carrying amount of the equity component $ — $ 55,615 The 2026 Notes consisted of the following (in thousands): March 31, December 31, Liability: Principal $ 1,150,000 $ 1,150,000 Unamortized debt discount — (237,096) Unamortized debt issuance costs (16,804) (14,165) Net carrying amount $ 1,133,196 $ 898,739 Carrying amount of the equity component $ — $ 271,229

Equity Awards (Tables)

Equity Awards (Tables)	3 Months Ended
	Mar. 31, 2022
Share-based Payment Arrangement [Abstract]
Summary of Stock-Based Compensation Expense	Stock-based compensation expense was as follows (in thousands): Quarter Ended March 31, 2022 2021 Cost of revenues $ 1,714 $ 1,750 Sales and marketing 5,924 5,251 Research and development 2,897 2,611 General and administrative 5,367 5,182 $ 15,902 $ 14,794
Summary of Stock Options Activity	The following table summarizes activity for awards that contain service-only vesting conditions (in thousands): Outstanding at December 31, 2021 2,739 Granted — Exercised (74) Forfeited/canceled (8) Nonvested at March 31, 2022 2,657
Summary of Restricted Stock Units Activity	The following table summarizes activity for restricted stock units (in thousands): Nonvested at December 31, 2021 1,503 Granted 114 Vested (292) Forfeited/canceled (54) Outstanding at March 31, 2022 1,271

Net Loss per Share - (Tables)

Net Loss per Share - (Tables)	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Loss per Share	The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share amounts): Quarter Ended March 31, 2022 2021 Numerator: Net loss attributable to BlackLine, Inc. $ (10,011) $ (38,964) Denominator: Weighted average shares 59,123 57,860 Add: Dilutive effect of securities — — Shares used to calculate diluted net loss per share 59,123 57,860 Basic net loss per share attributable to BlackLine, Inc. $ (0.17) $ (0.67) Diluted net loss per share attributable to BlackLine, Inc. $ (0.17) $ (0.67)
Schedule of Potentially Dilutive Shares Excluded From Calculation of Diluted Net Loss per Share Attributable to Common Stockholders	The following potentially dilutive shares were excluded from the calculation of diluted net loss per share attributable to common stockholders because they were anti-dilutive (in thousands): Quarter Ended March 31, 2022 2021 Stock options with service-only vesting conditions 2,657 3,021 Restricted stock units 1,271 2,107 Total shares excluded from net loss per share 3,928 5,128

Geographic Information (Tables)

Geographic Information (Tables)	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Schedule of Revenues by Geographic Region	The following table sets forth the Company’s revenues by geographic region (in thousands): Quarter Ended March 31, 2022 2021 United States $ 85,682 $ 72,041 International 34,554 26,815 $ 120,236 $ 98,856

Basis of Presentation, Signif_3

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements - Adjustment for Adoption of Accounting Principle (Details) - USD ($) $ in Thousands	Jan. 01, 2022	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Reclassification [Line Items]
Adjustment to equity for adoption of ASU 2020-06		$ 66,128	$ 339,628	$ 325,036	$ 422,070
Tax effect on adoption of ASU-2020-06		(12,862)	(191)
Additional Paid-in Capital
Reclassification [Line Items]
Adjustment to equity for adoption of ASU 2020-06		318,297	573,431	625,883	622,768
Accumulated Deficit
Reclassification [Line Items]
Adjustment to equity for adoption of ASU 2020-06		$ (252,875)	$ (234,678)	(301,735)	$ (201,651)
Cumulative Effect, Period of Adoption, Adjustment
Reclassification [Line Items]
Adjustment to equity for adoption of ASU 2020-06	$ (262,100)			(262,130)
Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-in Capital
Reclassification [Line Items]
Adjustment to equity for adoption of ASU 2020-06	(324,400)			(324,418)
Tax effect on adoption of ASU-2020-06	2,400
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Deficit
Reclassification [Line Items]
Adjustment to equity for adoption of ASU 2020-06	$ 62,300			$ 62,288

Redeemable Non-Controlling In_3

Redeemable Non-Controlling Interest - Additional Information (Details) - BlackLine K.K. - BlackLine K.K. $ in Millions	1 Months Ended
	Oct. 31, 2018USD ($)
Redeemable Noncontrolling Interest [Line Items]
Business combination, contribution	$ 4.5
Business combination, outstanding common stock percentage	51.00%

Redeemable Non-Controlling In_4

Redeemable Non-Controlling Interest - Summary of Redeemable Non-Controlling Interest (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Redeemable Noncontrolling Interest [Roll Forward]
Balance at beginning of period	$ 28,699	$ 12,524
Net loss attributable to redeemable non-controlling interest (excluding adjustment to non-controlling interest)	(3)	(197)
Foreign currency translation	(128)	(105)
Adjustment to redeemable non-controlling interest	(3,417)	5,937
Balance at end of period	$ 25,151	$ 18,159

Business Combinations - Narrati

Business Combinations - Narrative (Details) - FourQ Systems, Inc. $ in Thousands	Jan. 26, 2022USD ($)	Mar. 31, 2022USD ($)
Business Acquisition [Line Items]
Business combination, payable at closing	$ 160,200
Maximum contingent consideration to be distributed	73,200
Transaction related costs	3,100
Contingent consideration	$ 55,947	$ 55,900
Weighted average useful lives	6 years 6 months
Measurement Input, Expected Term
Business Acquisition [Line Items]
Contingent consideration, liability, measurement input	3	3

Business Combinations - Estimat

Business Combinations - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jan. 26, 2022	Mar. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Goodwill		$ 443,861	$ 289,710
FourQ Systems, Inc.
Business Acquisition [Line Items]
Purchase consideration	$ 214,214
Cash consideration	160,224
Post-acquisition working capital adjustment	(635)
Less: One-time expense related to accelerated vesting	(1,322)
Contingent consideration	55,947	$ 55,900
Cash and cash equivalents	1,164
Accounts receivable, net	1,853
Prepaid expenses and other current assets	410
Other assets	143
Property and equipment	659
Intangible assets	74,400
Goodwill	154,151
Accounts payable	(1,537)
Accrued liabilities	(2,585)
Deferred revenue	(231)
Deferred tax liabilities, net	(14,213)
Total consideration	$ 214,214

Business Combinations - Acquire

Business Combinations - Acquired Intangible Assets (Details) - FourQ Systems, Inc. $ in Thousands	Jan. 26, 2022USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 74,400
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Period	7 years
Fair Value	$ 64,900
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization Period	3 years
Fair Value	$ 9,500

Intangible Assets and Goodwil_2

Intangible Assets and Goodwill - Summary of Carrying Value of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 173,657	$ 99,257
Accumulated Amortization	(67,224)	(63,062)
Net Carrying Amount	106,433	36,195
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,977	15,977
Accumulated Amortization	(13,716)	(13,317)
Net Carrying Amount	2,261	2,660
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	129,258	64,358
Accumulated Amortization	(45,484)	(43,148)
Net Carrying Amount	83,774	21,210
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	26,089	16,589
Accumulated Amortization	(7,395)	(6,046)
Net Carrying Amount	18,694	10,543
Defensive patent
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,333	2,333
Accumulated Amortization	(629)	(551)
Net Carrying Amount	$ 1,704	$ 1,782

Intangible Assets and Goodwil_3

Intangible Assets and Goodwill -Changes in Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022USD ($)
Goodwill [Roll Forward]
Balance beginning	$ 289,710
Addition from acquisition	154,151
Balance ending	$ 443,861

Balance Sheet Components - Sche

Balance Sheet Components - Schedule of Investments in Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 666,091	$ 658,886
Gross Unrealized Gains	532	346
Gross Unrealized Losses	(501)	(268)
Fair Value	666,122	658,964
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	164,845
Gross Unrealized Gains	4
Gross Unrealized Losses	(209)
Fair Value	164,640
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	75,694	74,144
Gross Unrealized Gains	528	346
Gross Unrealized Losses	(18)	(10)
Fair Value	76,204	74,480
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	425,552	584,742
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(274)	(258)
Fair Value	$ 425,278	$ 584,484

Balance Sheet Components - Addi

Balance Sheet Components - Additional Information (Details)	3 Months Ended
	Mar. 31, 2022USD ($)position	Mar. 31, 2021USD ($)	Dec. 31, 2021USD ($)
Debt Securities, Available-for-sale [Line Items]
Realized gains (losses) recognized	$ 0	$ 0
Securities in continuous loss position, less than 12 months, estimated fair value	406,100,000		$ 379,700,000
Securities in continuous loss position, less than 12 Months, unrealized losses	$ 500,000		$ 300,000
Number of securities in continuous unrealized loss position, greater than 12 months | position	0

Balance Sheet Components - Summ

Balance Sheet Components - Summary of Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Balance Sheet Related Disclosures [Abstract]
Deferred customer contract acquisition costs	$ 81,880	$ 79,961
Restricted cash	247	252	$ 261
Capitalized software implementation costs	4,257	7,023
Other assets	3,704	617
Other Assets, Total	$ 90,088	$ 87,853

Balance Sheet Components - Sc_2

Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Balance Sheet Related Disclosures [Abstract]
Accrued salaries and employee benefits	$ 23,242	$ 32,156
Accrued income and other taxes payable	8,288	9,770
Other accrued expenses and current liabilities	6,871	9,004
Accrued Expenses and Other Current Liabilities, Total	$ 38,401	$ 50,930

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	$ 892,978	$ 1,091,074
Liabilities
Contingent consideration	74,863	20,732
Total liabilities	74,863	20,732
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	110,937	432,110
U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	10,497
Marketable securities	164,641
U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	14,985
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	76,203	74,480
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	90,437
Marketable securities	425,278	584,484
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	286,075	432,110
Liabilities
Contingent consideration	0	0
Total liabilities	0	0
Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	110,937	432,110
Level 1 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	10,497
Marketable securities	164,641
Level 1 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Level 1 | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Level 1 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Marketable securities	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	606,903	658,964
Liabilities
Contingent consideration	0	0
Total liabilities	0	0
Level 2 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Level 2 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Marketable securities	0
Level 2 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	14,985
Level 2 | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	76,203	74,480
Level 2 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	90,437
Marketable securities	425,278	584,484
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	0	0
Liabilities
Contingent consideration	74,863	20,732
Total liabilities	74,863	20,732
Level 3 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Level 3 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Marketable securities	0
Level 3 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Level 3 | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Level 3 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0
Marketable securities	$ 0	$ 0

Fair Value Measurements - Sum_2

Fair Value Measurements - Summary of Changes in Contingent Consideration Liability (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Additions in the period	$ 55,947	$ 0
Contingent Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning fair value	20,732	23,490
Change in fair value	(1,816)	7,702
Ending fair value	$ 74,863	$ 31,192

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) $ in Thousands	Mar. 31, 2022USD ($)	Jan. 26, 2022USD ($)
Rimilia
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ 12,500
Contingent consideration, liability, measurement input	2
FourQ Systems, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ 55,900	$ 55,947
FourQ Systems, Inc. | Measurement Input, Expected Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability, measurement input	3	3

Convertible Senior Notes - Summ

Convertible Senior Notes - Summary of Notes (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Convertible Senior Notes due 2024
Debt Instrument [Line Items]
Principal	$ 250,000	$ 250,000
Unamortized debt discount	0	(31,562)
Unamortized debt issuance costs	(3,044)	(2,938)
Net carrying amount	246,956	215,500
Carrying amount of the equity component	0	55,615
Convertible Senior Notes due 2026
Debt Instrument [Line Items]
Principal	1,150,000	1,150,000
Unamortized debt discount	0	(237,096)
Unamortized debt issuance costs	(16,804)	(14,165)
Net carrying amount	1,133,196	898,739
Carrying amount of the equity component	$ 0	$ 271,229

Convertible Senior Notes - Addi

Convertible Senior Notes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Interest expense related to amortization of debt discount and issuance costs	$ 1,357	$ 7,651
Convertible Senior Notes due 2024
Debt Instrument [Line Items]
Interest expense related to amortization of debt discount and issuance costs	300	5,300
Coupon interest expense	$ 100	$ 100
Remaining life of notes	28 months
Convertible Senior Notes due 2024 | Level 2
Debt Instrument [Line Items]
Estimated fair value of convertible senior notes	$ 307,500
Convertible Senior Notes due 2026
Debt Instrument [Line Items]
Interest expense related to amortization of debt discount and issuance costs	$ 1,000
Remaining life of notes	48 months
Convertible Senior Notes due 2026 | Level 2
Debt Instrument [Line Items]
Estimated fair value of convertible senior notes	$ 975,300

Equity Awards - Summary of Stoc

Equity Awards - Summary of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 15,902	$ 14,794
Cost of revenues
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	1,714	1,750
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	5,924	5,251
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	2,897	2,611
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 5,367	$ 5,182

Equity Awards - Additional Info

Equity Awards - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Stock-based compensation capitalized as an asset	$ 0.4	$ 0.4

Equity Awards - Summary of St_2

Equity Awards - Summary of Stock Options Activity (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2022shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning balance (in shares)	2,739
Granted (in shares)	0
Exercises (in shares)	(74)
Forfeitures/canceled (in shares)	(8)
Outstanding, Ending balance (in shares)	2,657

Equity Awards - Summary of Rest

Equity Awards - Summary of Restricted Stock Units Activity (Details) - Restricted stock units shares in Thousands	3 Months Ended
	Mar. 31, 2022shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested, Beginning Balance (in shares)	1,503
Grants (in shares)	114
Vested (in shares)	(292)
Forfeited/canceled (in shares)	(54)
Nonvested, Ending balance (in shares)	1,271

Unearned Revenue and Performa_2

Unearned Revenue and Performance Obligations - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Unearned Revenue And Performance Obligations [Abstract]
Deferred revenue recognized	$ 98.3	$ 79.4
Contracted not recognized revenue	$ 661.3

Unearned Revenue and Performa_3

Unearned Revenue and Performance Obligations - Remaining Performance Obligations (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01	Mar. 31, 2022
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contracted not recognized revenue, expects to recognize revenue over next 12 months	56.00%
Remaining performance obligation, expected timing of satisfaction, period	12 months

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Jan. 26, 2022
Income Tax Contingency [Line Items]
Income tax benefit	$ 12,862	$ 191
Decrease in valuation allowance	$ 14,000
FourQ Systems, Inc.
Income Tax Contingency [Line Items]
Deferred tax liabilities acquired in the acquisition			$ 17,700

Net Loss per Share - Schedule o

Net Loss per Share - Schedule of Basic and Diluted Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net loss attributable to BlackLine, Inc.	$ (10,011)	$ (38,964)
Weighted average shares
Weighted average shares (in shares)	59,123	57,860
Add: Dilutive effect of securities (in shares)	0	0
Shares used to calculate diluted net loss per share (in shares)	59,123	57,860
Basic net loss per share attributable to BlackLine, Inc. (in usd per share)	$ (0.17)	$ (0.67)
Diluted net loss per share attributable to BlackLine, Inc. (in usd per share)	$ (0.17)	$ (0.67)

Net Loss per Share - Schedule_2

Net Loss per Share - Schedule of Potentially Dilutive Shares Excluded From Calculation of Diluted Net Loss per Share Attributable to Common Stockholders (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	3,928	5,128
Stock options with service-only vesting conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	2,657	3,021
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share (in shares)	1,271	2,107

Net Loss per Share - Additional

Net Loss per Share - Additional Information (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Conversion option in notes not considered in calculation of diluted net loss per share (in shares)	3,928	5,128
Convertible Notes | Convertible Senior Notes due 2024
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Conversion option in notes not considered in calculation of diluted net loss per share (in shares)	3,400
Convertible Notes | Convertible Senior Notes due 2024 | Certain Corporate Events Occur Prior to Maturity Date or Company Issues Notice of Redemption
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Conversion option in notes not considered in calculation of diluted net loss per share (in shares)	4,700
Convertible Notes | Convertible Senior Notes due 2026
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Conversion option in notes not considered in calculation of diluted net loss per share (in shares)	6,900
Convertible Notes | Convertible Senior Notes due 2026 | Certain Corporate Events Occur Prior to Maturity Date or Company Issues Notice of Redemption
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Conversion option in notes not considered in calculation of diluted net loss per share (in shares)	9,900

Geographic Information (Details

Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 120,236	$ 98,856
United States
Disaggregation of Revenue [Line Items]
Total revenues	85,682	72,041
International
Disaggregation of Revenue [Line Items]
Total revenues	$ 34,554	$ 26,815

Subsequent Events (Details)

Subsequent Events (Details) - shares	Apr. 04, 2022	Mar. 31, 2022
Restricted stock units
Subsequent Event [Line Items]
Grants (in shares)		114,000
Subsequent Event | Stock options with performance conditions | Board of Directors, Compensation Committee
Subsequent Event [Line Items]
Grants (in shares)	200,000
Number of common stock entitled to receive upon vesting of award (in shares)	1
Vesting period	3 years
Subsequent Event | Stock options with performance conditions | Board of Directors, Compensation Committee | Tranche One
Subsequent Event [Line Items]
Vesting percentage	33.33%
Subsequent Event | Stock options with performance conditions | Board of Directors, Compensation Committee | Tranche Two
Subsequent Event [Line Items]
Vesting percentage	33.33%
Subsequent Event | Stock options with performance conditions | Board of Directors, Compensation Committee | Tranche Three
Subsequent Event [Line Items]
Vesting percentage	33.33%
Subsequent Event | Restricted stock units | Board of Directors, Compensation Committee
Subsequent Event [Line Items]
Grants (in shares)	900,000
Number of common stock entitled to receive upon vesting of award (in shares)	1
Vesting percentage	25.00%