BlackLine (BL) 10-Q 7 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 02, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	BL
Entity Registrant Name	BLACKLINE, INC.
Entity Central Index Key	0001666134
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		55,321,979
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity File Number	001-37924
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
Document Quarterly Report	true
Document Transition Report	false
Title of 12(b) Security	Common stock
Security Exchange Name	NASDAQ

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 63,255	$ 46,181
Marketable securities	81,939	86,396
Accounts receivable, net	79,135	74,902
Prepaid expenses and other current assets	11,453	14,042
Total current assets	235,782	221,521
Capitalized software development costs, net	9,252	9,023
Property and equipment, net	13,762	13,536
Intangible assets, net	21,629	27,785
Goodwill	185,138	185,138
Other assets	44,480	36,865
Total assets	523,502	493,868
Operating lease right-of-use assets	13,459
Current liabilities:
Accounts payable	2,963	3,442
Accrued expenses and other current liabilities	20,460	24,705
Deferred revenue	144,300	129,074
Short-term portion of operating lease liabilities	5,017
Short-term portion of contingent consideration	2,008	2,008
Total current liabilities	174,748	159,229
Operating lease liabilities, noncurrent	11,687
Contingent consideration	4,492	4,308
Deferred tax liabilities, net	1,098	1,116
Deferred revenue, noncurrent	174	277
Other long-term liabilities		2,982
Total liabilities	192,199	167,912
Commitments and contingencies (Note 7)
Redeemable non-controlling interest (Note 4)	4,118	4,387
Stockholders' equity:
Common stock	553	547
Additional paid-in capital	470,681	451,571
Accumulated other comprehensive income	299	45
Accumulated deficit	(144,348)	(130,594)
Total stockholders' equity	327,185	321,569
Total liabilities, redeemable non-controlling interest, and stockholders' equity	$ 523,502	$ 493,868

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues
Total revenues	$ 69,664	$ 55,454	$ 133,793	$ 106,738
Cost of revenues
Total cost of revenues	14,944	11,866	28,562	23,472
Gross profit	54,720	43,588	105,231	83,266
Operating expenses
Sales and marketing	37,192	32,150	73,040	61,377
Research and development	10,829	7,811	21,136	14,740
General and administrative	12,677	12,458	26,356	23,540
Total operating expenses	60,698	52,419	120,532	99,657
Loss from operations	(5,978)	(8,831)	(15,301)	(16,391)
Other income (expense)
Interest income	734	507	1,429	896
Interest expense				(4)
Other income, net	734	507	1,429	892
Loss before income taxes	(5,244)	(8,324)	(13,872)	(15,499)
Provision for income taxes	146	133	351	113
Net loss	(5,390)	(8,457)	(14,223)	(15,612)
Net loss and adjustment attributable to non-controlling interest (Note 4)	(165)		(415)
Net loss attributable to BlackLine, Inc.	$ (5,225)	$ (8,457)	$ (13,808)	$ (15,612)
Basic net loss per share attributable to BlackLine, Inc.	$ (0.09)	$ (0.16)	$ (0.25)	$ (0.29)
Shares used to calculate basic net loss per share	55,171	53,555	55,004	53,354
Diluted net loss per share attributable to BlackLine, Inc.	$ (0.09)	$ (0.16)	$ (0.25)	$ (0.29)
Shares used to calculate diluted net loss per share	55,171	53,555	55,004	53,354
Subscription and Support
Revenues
Total revenues	$ 66,066	$ 53,047	$ 127,340	$ 101,672
Cost of revenues
Total cost of revenues	11,588	9,493	22,420	18,874
Professional Services
Revenues
Total revenues	3,598	2,407	6,453	5,066
Cost of revenues
Total cost of revenues	$ 3,356	$ 2,373	$ 6,142	$ 4,598

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (5,390)	$ (8,457)	$ (14,223)	$ (15,612)
Other comprehensive income (loss):
Net change in unrealized gains (losses) on marketable securities, net of tax of $0 for the quarters and six months ended June 30, 2019 and 2018	142	16	236	(54)
Foreign currency translation	220		298
Other comprehensive income (loss)	362	16	534	(54)
Comprehensive loss	(5,028)	(8,441)	(13,689)	(15,666)
Less: Other comprehensive income attributable to redeemable non-controlling interest (excluding adjustment to redeemable non-controlling interest)	(111)		(323)
Comprehensive loss attributable to BlackLine, Inc.	$ (4,917)	$ (8,441)	$ (13,366)	$ (15,666)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (UNAUDITED) (PARENTHETICAL) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net change in unrealized gain on marketable securities, tax	$ 0	$ 0	$ 0	$ 0

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning Balance at Dec. 31, 2017	$ 317,305	$ 530	$ 419,628	$ (63)	$ (102,790)
Beginning Balance, shares at Dec. 31, 2017		52,983
Stock option exercises	6,104	$ 9	6,095
Stock option exercises, shares		852
Vesting of restricted stock units, shares		2
Acquisition of common stock for tax withholding obligations	(3,213)		(3,213)
Stock-based compensation	9,558		9,558
Other comprehensive income	(54)			(54)
Net loss attributable to BlackLine, Inc., including adjustment to redeemable non-controlling interest	(15,612)				(15,612)
Ending Balance at Jun. 30, 2018	314,088	$ 539	432,068	(117)	(118,402)
Ending Balance, shares at Jun. 30, 2018		53,837
Beginning Balance at Mar. 31, 2018	317,561	$ 535	427,104	(133)	(109,945)
Beginning Balance, shares at Mar. 31, 2018		53,442
Stock option exercises	2,651	$ 4	2,647
Stock option exercises, shares		393
Vesting of restricted stock units, shares		2
Acquisition of common stock for tax withholding obligations	(3,197)		(3,197)
Stock-based compensation	5,514		5,514
Other comprehensive income	16			16
Net loss attributable to BlackLine, Inc., including adjustment to redeemable non-controlling interest	(8,457)				(8,457)
Ending Balance at Jun. 30, 2018	314,088	$ 539	432,068	(117)	(118,402)
Ending Balance, shares at Jun. 30, 2018		53,837
Beginning Balance at Dec. 31, 2018	321,569	$ 547	451,571	45	(130,594)
Beginning Balance, shares at Dec. 31, 2018		54,683
Stock option exercises	4,562	$ 2	4,560
Stock option exercises, shares		288
Vesting of restricted stock units	3	$ 3
Vesting of restricted stock units, shares		262
Issuance of common stock through employee stock purchase plan	2,552	$ 1	2,551
Issuance of common stock through employee stock purchase plan, shares		74
Acquisition of common stock for tax withholding obligations	(2,588)		(2,588)
Stock-based compensation	14,641		14,641
Other comprehensive income	254			254
Net loss attributable to BlackLine, Inc., including adjustment to redeemable non-controlling interest	(13,808)		(54)		(13,754)
Ending Balance at Jun. 30, 2019	327,185	$ 553	470,681	299	(144,348)
Ending Balance, shares at Jun. 30, 2019		55,307
Beginning Balance at Mar. 31, 2019	320,536	$ 550	459,118	45	(139,177)
Beginning Balance, shares at Mar. 31, 2019		55,031
Stock option exercises	1,800	$ 1	1,799
Stock option exercises, shares		118
Vesting of restricted stock units	1	$ 1
Vesting of restricted stock units, shares		84
Issuance of common stock through employee stock purchase plan	2,552	$ 1	2,551
Issuance of common stock through employee stock purchase plan, shares		74
Acquisition of common stock for tax withholding obligations	(859)		(859)
Stock-based compensation	8,126		8,126
Other comprehensive income	254			254
Net loss attributable to BlackLine, Inc., including adjustment to redeemable non-controlling interest	(5,225)		(54)		(5,171)
Ending Balance at Jun. 30, 2019	$ 327,185	$ 553	$ 470,681	$ 299	$ (144,348)
Ending Balance, shares at Jun. 30, 2019		55,307

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities
Net loss attributable to BlackLine, Inc.	$ (13,808)	$ (15,612)
Net loss and adjustment attributable to redeemable non-controlling interest (Note 4)	(415)
Net loss	(14,223)	(15,612)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	11,476	10,931
Change in fair value of contingent consideration	184	190
Stock-based compensation	14,464	9,367
Noncash lease expense	2,460
Accretion of purchase discounts/premiums on marketable securities, net	(773)	(304)
Net foreign currency losses	1	403
Deferred income taxes	(18)	(307)
Provision for (benefit from) doubtful accounts receivable	73	(43)
Changes in operating assets and liabilities:
Accounts receivable	(4,271)	652
Prepaid expenses and other current assets	2,601	(2,624)
Other assets	(7,636)	(3,454)
Accounts payable	(1,066)	(4,910)
Accrued expenses and other current liabilities	(4,051)	(1,131)
Deferred revenue	15,123	13,150
Operating lease liabilities	(2,698)
Other long-term liabilities		195
Net cash provided by operating activities	11,646	6,503
Cash flows from investing activities
Purchases of marketable securities	(69,522)	(66,914)
Proceeds from maturities of marketable securities	74,988	62,449
Capitalized software development costs	(2,599)	(3,113)
Purchases of property and equipment	(1,989)	(3,696)
Net cash provided by (used in) investing activities	878	(11,274)
Cash flows from financing activities
Proceeds from exercises of stock options	4,565	6,065
Proceeds from employee stock purchase plan	2,552
Acquisition of common stock for tax withholding obligations	(2,588)	(3,213)
Principal payments on capital lease obligations		(443)
Financed purchases of property and equipment	(145)
Net cash provided by financing activities	4,384	2,409
Effect of foreign currency exchange rate changes on cash, cash equivalents, and restricted cash	164
Net increase (decrease) in cash, cash equivalents, and restricted cash	17,072	(2,362)
Cash, cash equivalents, and restricted cash, beginning of period	46,455	31,504
Cash, cash equivalents, and restricted cash, end of period	63,527	29,142
Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheets
Cash and cash equivalents at end of period	63,255	28,682
Restricted cash included within prepaid expenses and other current assets at end of period	19	200
Restricted cash included within other assets at end of period	253	260
Total cash, cash equivalents, and restricted cash at end of period shown in the consolidated statements of cash flows	63,527	29,142
Non-cash financing and investing activities
Stock-based compensation capitalized for software development	177	191
Capitalized software development costs included in accounts payable and accrued expenses and other current liabilities at end of period	113	264
Purchases of property and equipment included in accounts payable and accrued expenses and other current liabilities at end of period	1,279	$ 125
Leased assets obtained in exchange for new operating lease liabilities	$ 1,056

Company Overview

Company Overview	6 Months Ended
	Jun. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Company Overview	Note 1 – 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. The Company is headquartered in Woodland Hills, California and has offices in Australia, Canada, France, Germany, Hong Kong, Netherlands, Poland, Romania, Singapore, and the United Kingdom.

Basis of Presentation, Signific

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements	Note 2 – Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements The accompanying 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 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, 2018 filed with the Securities and Exchange Commission (“SEC”) on February 28, 2019. The 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 condensed consolidated balance sheet at December 31, 2018 was derived from audited financial statements, but does not include all disclosures required by GAAP. The operating results for the quarter and six months ended June 30, 2019 are not necessarily indicative of the results expected for the full year ending December 31, 2019. 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. Significant accounting policies The Company’s significant accounting policies are detailed in “Note 2: Summary of Significant Accounting Policies" of the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. Except as noted below, there have been no material changes to the Company’s significant accounting policies. Leases On January 1, 2019, the Company adopted Accounting Standards Codification No. 842, Leases, F inancial information related to periods prior to adoption are as originally reported under ASC 840, Leases . At January 1, 2019, the Company recorded operating lease right-of-use (“ROU”) assets of $14.9 million and operating lease liabilities of $18.3 million. The difference between the leased assets and lease liabilities represents the existing deferred rent liabilities balance at adoption, resulting from historical straight-line recognition of operating leases, which was reclassified upon adoption to reduce the measurement of the leased assets. The adoption of the standard did not have an impact on the Company’s stockholders’ equity, results of operations, or cash flows. The new standard provides several optional practical expedients in transition. The Company elected the package of three practical expedients permitted under the transition guidance, which eliminates the requirement to reassess whether a contract contains a lease and lease classification. The Company has also made accounting policy elections, including a short-term lease exception policy, permitting the Company to not apply the recognition requirements of this standard to short-term leases (i.e. leases with expected terms of 12 months or less), and an accounting policy to account for lease and certain non-lease components as a single component for certain classes of assets. The portfolio approach, which allows a lessee to account for its leases at a portfolio level, was elected for certain equipment leases in which the difference in accounting for each asset separately would not have been materially different from accounting for the assets as a combined unit. The Company has leases for office space, equipment, and data centers. The Company’s leases have remaining lease terms of less than one year to approximately seven years, some of which include options to extend the leases for up to four years, and some of which include options to terminate the leases within one year. The Company determines whether an arrangement is a lease, or contains a lease, at inception if the Company is both able to identify an asset and can conclude it has the right to control the identified asset for a period of time. Leases are included in operating lease ROU assets and operating lease liabilities on the Company’s condensed consolidated balance sheets. Leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheet. ROU assets represent the Company’s right to control an underlying asset for the lease term, and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As the Company’s leases do not provide an implicit rate, the Company used its incremental borrowing rate based on the information available at commencement date in determining the discount rate used to present value lease payments. The Company used the incremental borrowing rate on January 1, 2019 for operating leases that commenced on or prior to that date. The Company uses the incremental borrowing rate at the commencement date, or remeasurement date, for operating leases. The incremental borrowing rate used is estimated based on what the Company would be required to pay for a collateralized loan over a similar term. Additionally, the Company used the portfolio approach when applying the discount rate selected based on the dollar amount and term of the obligation. The Company’s leases typically do not include any residual value guarantees, bargain purchase options, or asset retirement obligations. The Company’s lease terms are only for periods in which it has enforceable rights. A lease is no longer enforceable when both the lessee and the lessor each have the right to terminate the lease without permission from the other party with no more than an insignificant penalty. The Company’s lease terms are impacted by options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. The Company generally uses the base, non-cancelable lease term when determining the lease assets and liabilities. The Company’s agreements may contain variable lease payments. The Company includes variable lease payments that depend on an index or a rate and excludes those which depend on facts or circumstances occurring after the commencement date, other than the passage of time. Additionally, for certain equipment leases, the Company applies a portfolio approach to effectively account for the operating lease ROU assets and operating lease liabilities. Judgment is required when determining whether any of the Company’s data center contracts contain a lease. The Company concluded a lease exists when the asset is specifically identifiable, substantially all the economic benefit of the asset is obtained, and the right to direct the use of the asset exists during the term of the lease. Recently issued accounting pronouncements not yet adopted In June 2016, the Financial Accounting Standards Board (“FASB”) issued guidance which requires that financial assets measured at amortized cost be presented at the net amount expected to be collected. This guidance amends the accounting for credit losses for available-for-sale securities and purchased financial assets with credit deterioration. This guidance is effective for annual periods beginning after December 15, 2019, and interim periods within those annual periods. Early adoption is permitted for any interim or annual period after December 15, 2018. The Company has not determined the impact of this guidance on its consolidated financial statements. In August 2018, the FASB issued guidance which modifies the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement Conceptual Framework for Financial Reporting—Chapter 8: Notes to Financial Statements Recently adopted accounting pronouncements In August 2018, the FASB issued guidance which aligns the accounting for implementation costs incurred in a hosting arrangement that is a service contract with the accounting for implementation costs incurred to develop or obtain internal-use software under ASC 350-40, in order to determine which costs to capitalize and recognize as an asset. The guidance will be effective for the Company for annual reporting periods, and interim periods within those years, beginning after December 15, 2019, and can be applied either prospectively to implementation costs incurred after the date of adoption or retrospectively to all arrangements. The Company adopted this guidance on a prospective basis effective April 1, 2019, and the adoption of this standard resulted in the Company capitalizing $0.4 million of implementation and consulting costs relating to its various hosting arrangements in the quarter and six months ended June 30, 2019. In February 2016, the FASB issued a new standard related to leases to increase transparency and comparability among organizations by requiring the recognition of ROU assets and lease liabilities on the balance sheet. Most prominent among the changes in the standard is the recognition of ROU assets and lease liabilities by lessees for those leases classified as operating leases. Under the standard, disclosures are required to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The Company adopted this guidance effective January 1, 2019. In February 2018, the FASB issued an Accounting Standard Update (“ASU”) that provides companies with an option to reclassify stranded tax effects resulting from enactment of the Tax Cuts and Jobs Act (the “Tax Act”) from accumulated other comprehensive income to retained earnings. The Company adopted this guidance effective January 1, 2019, and the adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In June 2018, the FASB issued guidance which expands the scope of Accounting Standards Codification Topic 718, Compensation—Stock Compensation

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Lessee Disclosure [Abstract]
Leases	Note 3 – Leases The following table sets forth the Company’s lease expense (in thousands): Quarter Ended June 30, 2019 Six Months Ended June 30, 2019 Operating lease cost $ 1,475 $ 2,988 Short-term lease cost 203 421 Variable cost 101 238 Total lease cost $ 1,779 $ 3,647 Supplemental information related to the Company’s leases was as follows (in thousands, except percentages): Quarter Ended June 30, 2019 Six Months Ended June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities - operating leases $ 1,603 $ 3,130 June 30, 2019 Weighted-average remaining lease term - operating leases (in years) 3.8 Weighted-average discount rate - operating leases 6 % Maturities of lease liabilities at June 30, 2019 was (in thousands): 2019 (remaining 6 months) $ 3,123 2020 5,271 2021 3,994 2022 2,965 2023 2,805 Thereafter 560 Total lease payments 18,718 Less imputed interest (2,014 ) Total $ 16,704 At June 30, 2019, leases entered into that have not yet commenced were not material and are not reflected in the table above. Future minimum lease payments under non-cancelable operating leases at December 31, 2018 was (in thousands): 2019 $ 7,059 2020 5,307 2021 3,786 2022 2,586 2023 2,638 Thereafter 237 Total $ 21,613

Redeemable Non-Controlling Inte

Redeemable Non-Controlling Interest	6 Months Ended
	Jun. 30, 2019
Equity Method Investments And Joint Ventures [Abstract]
Redeemable Non-Controlling Interest	Note 4—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 interests in BlackLine K.K. are classified outside of permanent equity in the Company’s condensed consolidated balance sheet, 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 estimated redemption value of the call/put option embedded in the redeemable non-controlling interests was $0.1 million at June 30, 2019. The following table summarizes the activity in the redeemable non-controlling interests for the periods indicated below: Quarter Ended June 30, 2019 Six Months Ended June 30, 2019 Balance at beginning of period $ 4,175 $ 4,387 Net loss attributable to redeemable non-controlling interest (excluding adjustment to non-controlling interest) (219 ) (469 ) Foreign currency translation 108 146 Adjustment to redeemable non-controlling interest 54 54 Balance at end of period $ 4,118 $ 4,118

Balance Sheet Components

Balance Sheet Components	6 Months Ended
	Jun. 30, 2019
Balance Sheet Related Disclosures [Abstract]
Balance Sheet Components	Note 5 – Balance Sheet Components Investments in Marketable Securities Investments in marketable securities presented within current assets on the condensed consolidated balance sheet consisted of the following: June 30, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Marketable securities U.S. treasury securities $ 29,684 $ 47 $ (4 ) $ 29,727 Corporate bonds 37,249 104 (1 ) 37,352 Commercial paper 14,860 — — 14,860 $ 81,793 $ 151 $ (5 ) $ 81,939 December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Marketable securities U.S. treasury securities $ 25,856 $ — $ (29 ) $ 25,827 Corporate bonds 32,030 — (60 ) 31,970 Commercial paper 28,599 — — 28,599 $ 86,485 $ — $ (89 ) $ 86,396 During the quarters and six months ended June 30, 2019 and 2018, there were no material realized gains or losses related to sales of marketable securities recognized in the Company’s unaudited condensed consolidated statements of operations. Net gains and losses related to maturities of marketable securities that were reclassified from accumulated other comprehensive loss to earnings in the unaudited condensed consolidated statements of operations were $0.2 million and $0.5 million for the quarter and six months ended June 30, 2019, respectively. Net gains and losses related to maturities of marketable securities that were reclassified from accumulated other comprehensive loss to earnings in the unaudited condensed consolidated statements of operations were $0.2 million and $0.3 million for the quarter and six months ended June 30, 2018. Net gains and losses are determined using the specific identification method. The Company’s marketable securities have a contractual maturity of less than two years. The amortized cost and fair values of marketable securities, by remaining contractual maturity, were as follows: June 30, 2019 Amortized Cost Fair Value (in thousands) Maturing within 1 year $ 74,718 $ 74,855 Maturing between 1 and 2 years 7,075 7,084 $ 81,793 $ 81,939 Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands): June 30, December 31, 2019 2018 Partner referral fees $ 789 $ 5,219 Other prepaid expenses and other current assets 10,664 8,823 $ 11,453 $ 14,042 Other Assets Other assets consisted of the following (in thousands): June 30, December 31, 2019 2018 Deferred customer contract acquisition costs $ 41,553 $ 34,172 Restricted cash 253 274 Other assets 2,674 2,419 $ 44,480 $ 36,865 Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities were comprised of the following (in thousands): June 30, December 31, 2019 2018 Accrued salaries and employee benefits $ 14,557 $ 17,054 Accrued income and other taxes payable 2,834 4,547 Short-term tenant improvement allowance — 475 Other accrued expenses and current liabilities 3,069 2,629 $ 20,460 $ 24,705

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 6 – 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): June 30, 2019 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 41,592 $ — $ — $ 41,592 Marketable securities U.S. treasury securities 29,727 — — 29,727 Corporate bonds — 37,352 — 37,352 Commercial paper — 14,860 — 14,860 Total assets $ 71,319 $ 52,212 $ — $ 123,531 Liabilities Contingent consideration $ — $ — $ 6,500 $ 6,500 Total liabilities $ — $ — $ 6,500 $ 6,500 December 31, 2018 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 32,021 $ — $ — $ 32,021 Marketable securities U.S. treasury securities 25,827 — — 25,827 Corporate bonds — 31,970 — 31,970 Commercial paper — 28,599 — 28,599 Total assets $ 57,848 $ 60,569 $ — $ 118,417 Liabilities Contingent consideration $ — $ — $ 6,316 $ 6,316 Total liabilities $ — $ — $ 6,316 $ 6,316 The following table summarizes the changes in the contingent consideration liability (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Beginning fair value $ 6,307 $ 5,978 $ 6,316 $ 5,866 Change in fair value 193 78 184 190 Ending fair value $ 6,500 $ 6,056 $ 6,500 $ 6,056 The fair value of contingent consideration is determined by discounting estimated future taxable income. The significant inputs used in the fair value measurement of contingent consideration are the timing and amount of taxable income in any given period and the discount rate, which considers the risk 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.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 7 – Commitments and Contingencies Contingent consideration —On September 3, 2013, BlackLine Systems, Inc. was acquired by BlackLine, Inc. (the “2013 Acquisition”). In conjunction with the 2013 Acquisition, option holders of BlackLine Systems, Inc. were allowed to cancel their stock option rights and receive a cash payment equal to the amount of calculated gain (less applicable expense and other items) had they exercised their stock options and then sold their common shares as part of the 2013 Acquisition. As a condition of the 2013 Acquisition, the Company is required to pay additional cash consideration to certain equity holders if the Company realizes a tax benefit from the use of net operating losses generated from the stock option exercises concurrent with the 2013 Acquisition. The maximum contingent cash consideration to be distributed is $8.0 million. The fair value of the contingent consideration was $6.5 million and $6.3 million at June 30, 2019 and December 31, 2018 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 June 30, 2019 and December 31, 2018, 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 is not probable or reasonably estimable.

Equity Awards

Equity Awards	6 Months Ended
	Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity Awards	Note 8 – Equity Awards Stock-based compensation expense Stock-based compensation expense recorded in the Company’s unaudited condensed consolidated statements of operations was as follows (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Cost of revenues $ 1,159 $ 682 $ 2,047 $ 1,520 Sales and marketing 3,558 2,308 6,552 3,745 Research and development 1,235 675 2,179 1,104 General and administrative 2,060 1,728 3,686 2,998 $ 8,012 $ 5,393 $ 14,464 $ 9,367 For each of the quarters ended June 30, 2019 and 2018, stock-based compensation capitalized as an asset was $0.1 million. For each of the six months ended June 30, 2019 and 2018, stock-based compensation capitalized as an asset was $0.2 million. Stock options The following table summarizes activity for awards that contain service-only vesting conditions : Outstanding at December 31, 2018 3,820 Granted 480 Exercised (304 ) Forfeited/canceled (23 ) Outstanding at June 30, 2019 3,973 Restricted stock units The following table summarizes activity for restricted stock units (in thousands): Nonvested at December 31, 2018 1,300 Granted 797 Vested (305 ) Forfeited/canceled (47 ) Nonvested at June 30, 2019 1,745 Stock options with performance conditions In October 2016, the Company granted options to purchase 682,800 shares of common stock at an exercise price of $14.00 per share to two executive officers that vest upon meeting certain performance conditions and continued service. The performance conditions include meeting yearly cash flow targets and cumulative annual recurring revenue targets through 2019. If each yearly cash flow target is met through 2019, but the full cumulative annual recurring target through 2019 is not met, the executive officers are still able to vest in the award if an additional cash flow target for 2020 and a cumulative annual recurring revenue target through 2020 are achieved. The cash flow performance targets for each year are determined concurrently with the annual budget process and, at December 31, 2018, because each yearly target had not yet been set, no grant date for the options was established. The cash flow performance targets for the final year were set during the quarter ended March 31, 2019, resulting in a grant date being established. The total fair value of the awards at grant date was approximately $24 million. At June 30, 2019, the Company has determined that the achievement of the performance targets is not probable and, accordingly, no stock-based compensation expense has been recorded for these awards.

Unearned Revenue and Performanc

Unearned Revenue and Performance Obligations	6 Months Ended
	Jun. 30, 2019
Unearned Revenue And Performance Obligations [Abstract]
Unearned Revenue and Performance Obligations	Note 9 – Unearned Revenue and Performance Obligations Revenue totaling $94.5 million and $74.7 million was recognized during the six months ended June 30, 2019 and 2018, respectively, that was previously included in the deferred revenue balance at December 31, 2018 and 2017, respectively. Contracted not recognized revenue was $302.3 million at June 30, 2019, of which the Company expects to recognize approximately 64% over the next 12 months and the remainder thereafter.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Note 10 – 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 each of the quarters ended June 30, 2019 and 2018, the Company recorded $ 0.1 million For the quarters ended June 30, 2019 and 2018, the Company maintained 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. For the six months ended June 30, 2019 and 2018, the Company recorded $0.4 million and $0.1 million in income tax expense, respectively. The increase in the income tax expense for the six months ended June 30, 2019, compared to the six months ended June 30, 2018, was related to a reduction in net operating losses in the Company’s foreign jurisdictions for the current period. For the six months ended June 30, 2019 and 2018, the Company maintained 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	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Net Loss per Share	Note 11 – 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 June 30, Six Months Ended June 30, 2019 2018 2019 2018 Numerator: Net loss attributable to BlackLine, Inc. $ (5,225 ) $ (8,457 ) $ (13,808 ) $ (15,612 ) Denominator: Weighted average shares 55,171 53,555 55,004 53,354 Add: Dilutive effect of securities — — — — Shares used to calculate diluted net loss per share 55,171 53,555 55,004 53,354 Basic net loss per share attributable to BlackLine, Inc. $ (0.09 ) $ (0.16 ) $ (0.25 ) $ (0.29 ) Diluted net loss per share attributable to BlackLine, Inc. $ (0.09 ) $ (0.16 ) $ (0.25 ) $ (0.29 ) 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): June 30, 2019 2018 Stock options with service-only vesting conditions 3,973 4,515 Stock options with performance conditions 683 683 Restricted stock units 1,745 1,089 Total shares excluded from net loss per share 6,401 6,287

Geographic Information

Geographic Information	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Geographic Information	Note 12 – 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 June 30, Six Months Ended June 30, 2019 2018 2019 2018 United States $ 53,731 $ 43,662 $ 103,899 $ 84,674 International 15,933 11,792 29,894 22,064 $ 69,664 $ 55,454 $ 133,793 $ 106,738

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	Note 13 – Subsequent Events On August 6, 2019, the Compensation Committee of the Board of Directors of BlackLine, Inc. approved restricted stock unit grants to employees totaling 0.1 million shares. Each restricted stock unit entitles the recipient to receive one share of common stock upon vesting of the award. The vast majority of the restricted stock units will vest as to one-fourth of the total number of units awarded on the first anniversary of August 20, 2019 and quarterly thereafter for 12 consecutive quarters.

Basis of Presentation, Signif_2

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2019
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.
Leases	Leases On January 1, 2019, the Company adopted Accounting Standards Codification No. 842, Leases, F inancial information related to periods prior to adoption are as originally reported under ASC 840, Leases . At January 1, 2019, the Company recorded operating lease right-of-use (“ROU”) assets of $14.9 million and operating lease liabilities of $18.3 million. The difference between the leased assets and lease liabilities represents the existing deferred rent liabilities balance at adoption, resulting from historical straight-line recognition of operating leases, which was reclassified upon adoption to reduce the measurement of the leased assets. The adoption of the standard did not have an impact on the Company’s stockholders’ equity, results of operations, or cash flows. The new standard provides several optional practical expedients in transition. The Company elected the package of three practical expedients permitted under the transition guidance, which eliminates the requirement to reassess whether a contract contains a lease and lease classification. The Company has also made accounting policy elections, including a short-term lease exception policy, permitting the Company to not apply the recognition requirements of this standard to short-term leases (i.e. leases with expected terms of 12 months or less), and an accounting policy to account for lease and certain non-lease components as a single component for certain classes of assets. The portfolio approach, which allows a lessee to account for its leases at a portfolio level, was elected for certain equipment leases in which the difference in accounting for each asset separately would not have been materially different from accounting for the assets as a combined unit. The Company has leases for office space, equipment, and data centers. The Company’s leases have remaining lease terms of less than one year to approximately seven years, some of which include options to extend the leases for up to four years, and some of which include options to terminate the leases within one year. The Company determines whether an arrangement is a lease, or contains a lease, at inception if the Company is both able to identify an asset and can conclude it has the right to control the identified asset for a period of time. Leases are included in operating lease ROU assets and operating lease liabilities on the Company’s condensed consolidated balance sheets. Leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheet. ROU assets represent the Company’s right to control an underlying asset for the lease term, and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As the Company’s leases do not provide an implicit rate, the Company used its incremental borrowing rate based on the information available at commencement date in determining the discount rate used to present value lease payments. The Company used the incremental borrowing rate on January 1, 2019 for operating leases that commenced on or prior to that date. The Company uses the incremental borrowing rate at the commencement date, or remeasurement date, for operating leases. The incremental borrowing rate used is estimated based on what the Company would be required to pay for a collateralized loan over a similar term. Additionally, the Company used the portfolio approach when applying the discount rate selected based on the dollar amount and term of the obligation. The Company’s leases typically do not include any residual value guarantees, bargain purchase options, or asset retirement obligations. The Company’s lease terms are only for periods in which it has enforceable rights. A lease is no longer enforceable when both the lessee and the lessor each have the right to terminate the lease without permission from the other party with no more than an insignificant penalty. The Company’s lease terms are impacted by options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. The Company generally uses the base, non-cancelable lease term when determining the lease assets and liabilities. The Company’s agreements may contain variable lease payments. The Company includes variable lease payments that depend on an index or a rate and excludes those which depend on facts or circumstances occurring after the commencement date, other than the passage of time. Additionally, for certain equipment leases, the Company applies a portfolio approach to effectively account for the operating lease ROU assets and operating lease liabilities. Judgment is required when determining whether any of the Company’s data center contracts contain a lease. The Company concluded a lease exists when the asset is specifically identifiable, substantially all the economic benefit of the asset is obtained, and the right to direct the use of the asset exists during the term of the lease.
Recently Issued Accounting Pronouncements Not Yet Adopted	Recently issued accounting pronouncements not yet adopted In June 2016, the Financial Accounting Standards Board (“FASB”) issued guidance which requires that financial assets measured at amortized cost be presented at the net amount expected to be collected. This guidance amends the accounting for credit losses for available-for-sale securities and purchased financial assets with credit deterioration. This guidance is effective for annual periods beginning after December 15, 2019, and interim periods within those annual periods. Early adoption is permitted for any interim or annual period after December 15, 2018. The Company has not determined the impact of this guidance on its consolidated financial statements. In August 2018, the FASB issued guidance which modifies the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement Conceptual Framework for Financial Reporting—Chapter 8: Notes to Financial Statements
Recently Adopted Accounting Pronouncements	Recently adopted accounting pronouncements In August 2018, the FASB issued guidance which aligns the accounting for implementation costs incurred in a hosting arrangement that is a service contract with the accounting for implementation costs incurred to develop or obtain internal-use software under ASC 350-40, in order to determine which costs to capitalize and recognize as an asset. The guidance will be effective for the Company for annual reporting periods, and interim periods within those years, beginning after December 15, 2019, and can be applied either prospectively to implementation costs incurred after the date of adoption or retrospectively to all arrangements. The Company adopted this guidance on a prospective basis effective April 1, 2019, and the adoption of this standard resulted in the Company capitalizing $0.4 million of implementation and consulting costs relating to its various hosting arrangements in the quarter and six months ended June 30, 2019. In February 2016, the FASB issued a new standard related to leases to increase transparency and comparability among organizations by requiring the recognition of ROU assets and lease liabilities on the balance sheet. Most prominent among the changes in the standard is the recognition of ROU assets and lease liabilities by lessees for those leases classified as operating leases. Under the standard, disclosures are required to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The Company adopted this guidance effective January 1, 2019. In February 2018, the FASB issued an Accounting Standard Update (“ASU”) that provides companies with an option to reclassify stranded tax effects resulting from enactment of the Tax Cuts and Jobs Act (the “Tax Act”) from accumulated other comprehensive income to retained earnings. The Company adopted this guidance effective January 1, 2019, and the adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In June 2018, the FASB issued guidance which expands the scope of Accounting Standards Codification Topic 718, Compensation—Stock Compensation

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Lessee Disclosure [Abstract]
Summary of Lease Expense	The following table sets forth the Company’s lease expense (in thousands): Quarter Ended June 30, 2019 Six Months Ended June 30, 2019 Operating lease cost $ 1,475 $ 2,988 Short-term lease cost 203 421 Variable cost 101 238 Total lease cost $ 1,779 $ 3,647
Summary of Supplemental Information Related to Leases	Supplemental information related to the Company’s leases was as follows (in thousands, except percentages): Quarter Ended June 30, 2019 Six Months Ended June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities - operating leases $ 1,603 $ 3,130 June 30, 2019 Weighted-average remaining lease term - operating leases (in years) 3.8 Weighted-average discount rate - operating leases 6 %
Schedule of Maturities of Lease Liabilities and Future Minimum Lease Payments Under Non-cancelable Operating Leases	Maturities of lease liabilities at June 30, 2019 was (in thousands): 2019 (remaining 6 months) $ 3,123 2020 5,271 2021 3,994 2022 2,965 2023 2,805 Thereafter 560 Total lease payments 18,718 Less imputed interest (2,014 ) Total $ 16,704 At June 30, 2019, leases entered into that have not yet commenced were not material and are not reflected in the table above. Future minimum lease payments under non-cancelable operating leases at December 31, 2018 was (in thousands): 2019 $ 7,059 2020 5,307 2021 3,786 2022 2,586 2023 2,638 Thereafter 237 Total $ 21,613

Redeemable Non-Controlling In_2

Redeemable Non-Controlling Interest (Tables)	6 Months Ended
	Jun. 30, 2019
Equity Method Investments And Joint Ventures [Abstract]
Summary of Redeemable Non-Controlling Interests	The following table summarizes the activity in the redeemable non-controlling interests for the periods indicated below: Quarter Ended June 30, 2019 Six Months Ended June 30, 2019 Balance at beginning of period $ 4,175 $ 4,387 Net loss attributable to redeemable non-controlling interest (excluding adjustment to non-controlling interest) (219 ) (469 ) Foreign currency translation 108 146 Adjustment to redeemable non-controlling interest 54 54 Balance at end of period $ 4,118 $ 4,118

Balance Sheet Components (Table

Balance Sheet Components (Tables)	6 Months Ended
	Jun. 30, 2019
Balance Sheet Related Disclosures [Abstract]
Schedule of Investments in Marketable Securities	Investments in marketable securities presented within current assets on the condensed consolidated balance sheet consisted of the following: June 30, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Marketable securities U.S. treasury securities $ 29,684 $ 47 $ (4 ) $ 29,727 Corporate bonds 37,249 104 (1 ) 37,352 Commercial paper 14,860 — — 14,860 $ 81,793 $ 151 $ (5 ) $ 81,939 December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Marketable securities U.S. treasury securities $ 25,856 $ — $ (29 ) $ 25,827 Corporate bonds 32,030 — (60 ) 31,970 Commercial paper 28,599 — — 28,599 $ 86,485 $ — $ (89 ) $ 86,396
Summary of Amortized Cost and Fair Values of Marketable Securities, by Remaining Contractual Maturity	The amortized cost and fair values of marketable securities, by remaining contractual maturity, were as follows: June 30, 2019 Amortized Cost Fair Value (in thousands) Maturing within 1 year $ 74,718 $ 74,855 Maturing between 1 and 2 years 7,075 7,084 $ 81,793 $ 81,939
Summary of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets consisted of the following (in thousands): June 30, December 31, 2019 2018 Partner referral fees $ 789 $ 5,219 Other prepaid expenses and other current assets 10,664 8,823 $ 11,453 $ 14,042
Schedule of Other Assets	Other assets consisted of the following (in thousands): June 30, December 31, 2019 2018 Deferred customer contract acquisition costs $ 41,553 $ 34,172 Restricted cash 253 274 Other assets 2,674 2,419 $ 44,480 $ 36,865
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities were comprised of the following (in thousands): June 30, December 31, 2019 2018 Accrued salaries and employee benefits $ 14,557 $ 17,054 Accrued income and other taxes payable 2,834 4,547 Short-term tenant improvement allowance — 475 Other accrued expenses and current liabilities 3,069 2,629 $ 20,460 $ 24,705

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
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): June 30, 2019 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 41,592 $ — $ — $ 41,592 Marketable securities U.S. treasury securities 29,727 — — 29,727 Corporate bonds — 37,352 — 37,352 Commercial paper — 14,860 — 14,860 Total assets $ 71,319 $ 52,212 $ — $ 123,531 Liabilities Contingent consideration $ — $ — $ 6,500 $ 6,500 Total liabilities $ — $ — $ 6,500 $ 6,500 December 31, 2018 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 32,021 $ — $ — $ 32,021 Marketable securities U.S. treasury securities 25,827 — — 25,827 Corporate bonds — 31,970 — 31,970 Commercial paper — 28,599 — 28,599 Total assets $ 57,848 $ 60,569 $ — $ 118,417 Liabilities Contingent consideration $ — $ — $ 6,316 $ 6,316 Total liabilities $ — $ — $ 6,316 $ 6,316
Contingent Consideration
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 June 30, Six Months Ended June 30, 2019 2018 2019 2018 Beginning fair value $ 6,307 $ 5,978 $ 6,316 $ 5,866 Change in fair value 193 78 184 190 Ending fair value $ 6,500 $ 6,056 $ 6,500 $ 6,056 The fair value of contingent consideration is determined by discounting estimated future taxable income. The significant inputs used in the fair value measurement of contingent consideration are the timing and amount of taxable income in any given period and the discount rate, which considers the risk 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.

Equity Awards (Tables)

Equity Awards (Tables)	6 Months Ended
	Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Stock-Based Compensation Expense	Stock-based compensation expense recorded in the Company’s unaudited condensed consolidated statements of operations was as follows (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Cost of revenues $ 1,159 $ 682 $ 2,047 $ 1,520 Sales and marketing 3,558 2,308 6,552 3,745 Research and development 1,235 675 2,179 1,104 General and administrative 2,060 1,728 3,686 2,998 $ 8,012 $ 5,393 $ 14,464 $ 9,367
Summary of Stock Options Activity	The following table summarizes activity for awards that contain service-only vesting conditions : Outstanding at December 31, 2018 3,820 Granted 480 Exercised (304 ) Forfeited/canceled (23 ) Outstanding at June 30, 2019 3,973
Summary of Restricted Stock Units Activity	The following table summarizes activity for restricted stock units (in thousands): Nonvested at December 31, 2018 1,300 Granted 797 Vested (305 ) Forfeited/canceled (47 ) Nonvested at June 30, 2019 1,745

Net Loss per Share (Tables)

Net Loss per Share (Tables)	6 Months Ended
	Jun. 30, 2019
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 June 30, Six Months Ended June 30, 2019 2018 2019 2018 Numerator: Net loss attributable to BlackLine, Inc. $ (5,225 ) $ (8,457 ) $ (13,808 ) $ (15,612 ) Denominator: Weighted average shares 55,171 53,555 55,004 53,354 Add: Dilutive effect of securities — — — — Shares used to calculate diluted net loss per share 55,171 53,555 55,004 53,354 Basic net loss per share attributable to BlackLine, Inc. $ (0.09 ) $ (0.16 ) $ (0.25 ) $ (0.29 ) Diluted net loss per share attributable to BlackLine, Inc. $ (0.09 ) $ (0.16 ) $ (0.25 ) $ (0.29 )
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): June 30, 2019 2018 Stock options with service-only vesting conditions 3,973 4,515 Stock options with performance conditions 683 683 Restricted stock units 1,745 1,089 Total shares excluded from net loss per share 6,401 6,287

Geographic Information (Tables)

Geographic Information (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Schedule of Disaggregation of Revenues by Geographic Region	The following table sets forth the Company’s revenues by geographic region (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 United States $ 53,731 $ 43,662 $ 103,899 $ 84,674 International 15,933 11,792 29,894 22,064 $ 69,664 $ 55,454 $ 133,793 $ 106,738

Basis of Presentation, Signif_3

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jan. 01, 2019
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating lease right-of-use (“ROU”) assets	$ 13,459	$ 13,459	$ 14,900
Operating lease liabilities	16,704	$ 16,704	$ 18,300
Description of operating lease, option to extend		some of which include options to extend the leases for up to four years
Description of operating lease, option to terminate		some of which include options to terminate the leases within one year
Implementation and consulting costs	$ 400	$ 400
Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating lease, remaining lease term	1 year	1 year
Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating lease, remaining lease term	7 years	7 years
Operating lease, extended lease term	4 years	4 years
Operating lease, termination period		1 year

Leases - Summary of Lease Expen

Leases - Summary of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lease Cost [Abstract]
Operating lease cost	$ 1,475	$ 2,988
Short-term lease cost	203	421
Variable cost	101	238
Total lease cost	$ 1,779	$ 3,647

Leases - Summary of Supplementa

Leases - Summary of Supplemental Information Related to Leases (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2019USD ($)
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities - operating leases	$ 1,603	$ 3,130
Weighted-average remaining lease term - operating leases (in years)	3 years 9 months 18 days	3 years 9 months 18 days
Weighted-average discount rate - operating leases	6.00%	6.00%

Leases - Schedule of Maturities

Leases - Schedule of Maturities of Lease Liabilities and Future Minimum Lease Payments Under Non-cancelable Operating Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Lease Liabilities Payments Due [Abstract]
2019 (remaining 6 months)	$ 3,123
2019			$ 7,059
2020	5,271		5,307
2021	3,994		3,786
2022	2,965		2,586
2023	2,805		2,638
Thereafter	560		237
Total lease payments	18,718		$ 21,613
Less imputed interest	(2,014)
Total	$ 16,704	$ 18,300

Redeemable Non-Controlling In_3

Redeemable Non-Controlling Interest - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Oct. 31, 2018	Jun. 30, 2019
Redeemable Noncontrolling Interest [Line Items]
Redeemable non-controlling interests		$ 0.1
BlackLine K.K.
Redeemable Noncontrolling Interest [Line Items]
Business combination, agreement date	Sep. 30, 2018
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 Interests (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Equity Method Investments And Joint Ventures [Abstract]
Balance at beginning of period	$ 4,175	$ 4,387
Net loss attributable to redeemable non-controlling interest (excluding adjustment to non-controlling interest)	(219)	(469)
Foreign currency translation	108	146
Adjustment to redeemable non-controlling interest	54	54
Balance at end of period	$ 4,118	$ 4,118

Balance Sheet Components - Sche

Balance Sheet Components - Schedule of Investments in Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 81,793	$ 86,485
Gross Unrealized Gains	151
Gross Unrealized Losses	(5)	(89)
Fair Value	81,939	86,396
U.S. treasury securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	29,684	25,856
Gross Unrealized Gains	47
Gross Unrealized Losses	(4)	(29)
Fair Value	29,727	25,827
Corporate bonds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	37,249	32,030
Gross Unrealized Gains	104
Gross Unrealized Losses	(1)	(60)
Fair Value	37,352	31,970
Commercial paper
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	14,860	28,599
Fair Value	$ 14,860	$ 28,599

Balance Sheet Components - Addi

Balance Sheet Components - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule Of Available For Sale Securities [Line Items]
Realized gain and losses recognized	$ 0	$ 0	$ 0	$ 0
Net gains and losses on maturities of marketable securities reclassified from accumulated other comprehensive loss to earnings	$ 200,000	$ 200,000	$ 500,000	$ 300,000
Maximum
Schedule Of Available For Sale Securities [Line Items]
Marketable securities contractual maturity period			2 years

Balance Sheet Components - Summ

Balance Sheet Components - Summary of Amortized Cost and Fair Values of Marketable Securities, by Remaining Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Maturing within 1 year	$ 74,718
Maturing between 1 and 2 years	7,075
Amortized Cost	81,793	$ 86,485
Maturing within 1 year	74,855
Maturing between 1 and 2 years	7,084
Total, Fair Value	$ 81,939

Balance Sheet Components - Su_2

Balance Sheet Components - Summary of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Partner referral fees	$ 789	$ 5,219
Other prepaid expenses and other current assets	10,664	8,823
Prepaid expenses and other current assets, Total	$ 11,453	$ 14,042

Balance Sheet Components - Su_3

Balance Sheet Components - Summary of Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Balance Sheet Related Disclosures [Abstract]
Deferred customer contract acquisition costs	$ 41,553	$ 34,172
Restricted cash	253	274	$ 260
Other assets	2,674	2,419
Other Assets Noncurrent	$ 44,480	$ 36,865

Balance Sheet Components - Sc_2

Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Payables And Accruals [Abstract]
Accrued salaries and employee benefits	$ 14,557	$ 17,054
Accrued income and other taxes payable	2,834	4,547
Short-term tenant improvement allowance		475
Other accrued expenses and current liabilities	3,069	2,629
Accrued expenses and other current liabilities	$ 20,460	$ 24,705

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	Jun. 30, 2019	Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	$ 123,531	$ 118,417
Liabilities
Contingent consideration	6,500	6,316
Total liabilities	6,500	6,316
Money market funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	41,592	32,021
U.S. treasury securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	29,727	25,827
Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	37,352	31,970
Commercial paper
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	14,860	28,599
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	71,319	57,848
Level 1 | Money market funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	41,592	32,021
Level 1 | U.S. treasury securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	29,727	25,827
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	52,212	60,569
Level 2 | Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	37,352	31,970
Level 2 | Commercial paper
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	14,860	28,599
Level 3
Liabilities
Contingent consideration	6,500	6,316
Total liabilities	$ 6,500	$ 6,316

Fair Value Measurements - Sum_2

Fair Value Measurements - Summary of Changes in Contingent Consideration Liability (Details) - Contingent Consideration - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Beginning fair value	$ 6,307	$ 5,978	$ 6,316	$ 5,866
Change in fair value	193	78	184	190
Ending fair value	$ 6,500	$ 6,056	$ 6,500	$ 6,056

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - BlackLine Systems, Inc. - USD ($) $ in Millions	Sep. 03, 2013	Jun. 30, 2019	Dec. 31, 2018
Business Acquisition Contingent Consideration [Line Items]
Maximum contingent cash consideration to be distributed	$ 8
Contingent Consideration
Business Acquisition Contingent Consideration [Line Items]
Fair value of contingent consideration		$ 6.5	$ 6.3

Equity Awards - Summary of Stoc

Equity Awards - Summary of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 8,012	$ 5,393	$ 14,464	$ 9,367
Cost of Revenues
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,159	682	2,047	1,520
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	3,558	2,308	6,552	3,745
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,235	675	2,179	1,104
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 2,060	$ 1,728	$ 3,686	$ 2,998

Equity Awards - Additional Info

Equity Awards - Additional Information (Details)	1 Months Ended	3 Months Ended		6 Months Ended
	Oct. 31, 2016USD ($)ExecutiveOfficer$ / sharesshares	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)shares	Jun. 30, 2018USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation capitalized as an asset		$ 100,000	$ 100,000	$ 200,000	$ 200,000
Stock options granted to purchase shares of common stock for employee | shares				480,000
Stock-based compensation, cost		$ 8,012,000	$ 5,393,000	$ 14,464,000	$ 9,367,000
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of executive officers, options granted | ExecutiveOfficer	2
Executive Officer | Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options granted to purchase shares of common stock for employee | shares	682,800
Exercise price of options, granted | $ / shares	$ 14
Options vesting terms				The performance conditions include meeting yearly cash flow targets and cumulative annual recurring revenue targets through 2019.
Stock-based compensation, cost				$ 0
Total fair value of awards grant	$ 24,000,000

Equity Awards - Summary of St_2

Equity Awards - Summary of Stock Options Activity (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2019shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning balance	3,820
Granted	480
Exercised	(304)
Forfeited/canceled	(23)
Outstanding, Ending balance	3,973

Equity Awards - Summary of Rest

Equity Awards - Summary of Restricted Stock Units Activity (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2019shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Restricted stock units, Nonvested, Beginning balance	1,300
Restricted stock units, Granted	797
Restricted stock units, Vested	(305)
Restricted stock units, Forfeited/canceled	(47)
Restricted stock units, Nonvested, Ending balance	1,745

Unearned Revenue and Performa_2

Unearned Revenue and Performance Obligations - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Unearned Revenue And Performance Obligations [Abstract]
Deferred revenue recognized	$ 94.5	$ 74.7
Contracted not recognized revenue	$ 302.3
Contracted not recognized revenue, expects to recognize revenue over next 12 months	64.00%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Corporate tax rate			21.00%
Income tax expense	$ 146	$ 133	$ 351	$ 113

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		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net loss attributable to BlackLine, Inc.	$ (5,225)	$ (8,457)	$ (13,808)	$ (15,612)
Denominator:
Weighted average shares	55,171	53,555	55,004	53,354
Shares used to calculate diluted net loss per share	55,171	53,555	55,004	53,354
Basic net loss per share attributable to BlackLine, Inc.	$ (0.09)	$ (0.16)	$ (0.25)	$ (0.29)
Diluted net loss per share attributable to BlackLine, Inc.	$ (0.09)	$ (0.16)	$ (0.25)	$ (0.29)

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	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share	6,401	6,287
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	3,973	4,515
Stock options with performance conditions
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share	683	683
Restricted stock units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share	1,745	1,089

Geographic Information - Schedu

Geographic Information - Schedule of Disaggregation of Revenues by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Total revenues	$ 69,664	$ 55,454	$ 133,793	$ 106,738
United States
Disaggregation Of Revenue [Line Items]
Total revenues	53,731	43,662	103,899	84,674
International
Disaggregation Of Revenue [Line Items]
Total revenues	$ 15,933	$ 11,792	$ 29,894	$ 22,064

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - Restricted stock units - shares	Aug. 06, 2019	Jun. 30, 2019
Subsequent Event [Line Items]
Vesting term		The vast majority of the restricted stock units will vest as to one-fourth of the total number of units awarded on the first anniversary of August 20, 2019 and quarterly thereafter for 12 consecutive quarters.
Subsequent Event
Subsequent Event [Line Items]
Approved restricted stock unit grants to employees	100,000
Number of common stock entitled to receive upon vesting of award	1
Vesting percentage	25.00%