BlackLine (BL) 10-Q8 Aug 182018 Q2 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2018	Aug. 03, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Trading Symbol	BL
Entity Registrant Name	BLACKLINE, INC.
Entity Central Index Key	1,666,134
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		53,938,782

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	[1]
Current assets:
Cash and cash equivalents	$ 28,682	$ 31,104
Marketable securities	86,191	81,476
Accounts receivable, net	61,057	61,918
Prepaid expenses and other current assets	16,603	13,956
Total current assets	192,533	188,454
Capitalized software development costs, net	8,308	6,824
Property and equipment, net	13,754	12,769
Intangible assets, net	34,173	40,808
Goodwill	185,138	185,138
Other assets	30,534	26,820
Total assets	464,440	460,813
Current liabilities:
Accounts payable	2,496	7,254
Accrued expenses and other current liabilities	19,248	20,874
Deferred revenue	117,420	104,184
Short-term portion of contingent consideration	2,008	2,008
Total current liabilities	141,172	134,320
Contingent consideration	4,048	3,858
Deferred tax liabilities, net	1,436	1,743
Deferred revenue, noncurrent	382	468
Other long-term liabilities	3,314	3,119
Total liabilities	150,352	143,508
Commitments and contingencies (Note 6)
Stockholders' equity:
Common stock	539	530
Additional paid-in capital	432,068	419,628
Accumulated other comprehensive loss	(117)	(63)
Accumulated deficit	(118,402)	(102,790)
Total stockholders' equity	314,088	317,305
Total liabilities and stockholders' equity	$ 464,440	$ 460,813

[1]	See Note 3 for a summary of adjustments.

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2018	Jun. 30, 2017
Revenues
Total revenues		$ 55,454	$ 41,981	[1]	$ 106,738	$ 80,162	[1]
Cost of revenues
Total cost of revenues		11,866	10,357	[1]	23,472	19,567	[1]
Gross profit		43,588	31,624	[1]	83,266	60,595	[1]
Operating expenses
Sales and marketing		32,150	23,992	[1]	61,377	45,812	[1]
Research and development		7,811	6,009	[1]	14,740	11,957	[1]
General and administrative		12,458	8,466	[1]	23,540	16,719	[1]
Total operating expenses		52,419	38,467	[1]	99,657	74,488	[1]
Loss from operations		(8,831)	(6,843)	[1]	(16,391)	(13,893)	[1]
Other income (expense)
Interest income		507	244	[1]	896	468	[1]
Interest expense			(3)	[1]	(4)	(7)	[1]
Change in fair value of the common stock warrant liability	[1]		(2,490)			(3,490)
Other income (expense), net		507	(2,249)	[1]	892	(3,029)	[1]
Loss before income taxes		(8,324)	(9,092)	[1]	(15,499)	(16,922)	[1]
Provision for (benefit from) income taxes		133	34	[1]	113	(111)	[1]
Net loss		$ (8,457)	$ (9,126)	[1]	$ (15,612)	$ (16,811)	[1]
Basic net loss per share		$ (0.16)	$ (0.18)	[1]	$ (0.29)	$ (0.33)	[1]
Shares used to calculate basic net loss per share		53,555	51,842	[1]	53,354	51,563	[1]
Diluted net loss per share		$ (0.16)	$ (0.18)	[1]	$ (0.29)	$ (0.33)	[1]
Shares used to calculate diluted net loss per share		53,555	51,842	[1]	53,354	51,563	[1]
Subscription and Support
Revenues
Total revenues		$ 53,047	$ 39,832	[1]	$ 101,672	$ 76,390	[1]
Cost of revenues
Total cost of revenues		9,493	8,227	[1]	18,874	15,982	[1]
Professional Services
Revenues
Total revenues		2,407	2,149	[1]	5,066	3,772	[1]
Cost of revenues
Total cost of revenues		$ 2,373	$ 2,130	[1]	$ 4,598	$ 3,585	[1]

[1]	See Note 3 for a summary of adjustments.

CONDENSED CONSOLIDATED STATEME4

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	[1]	Jun. 30, 2018	Jun. 30, 2017	[1]
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (8,457)	$ (9,126)		$ (15,612)	$ (16,811)
Other comprehensive income (loss)
Net change in unrealized gain on marketable securities, net of tax of $0 for the quarters and six months ended June 30, 2018 and 2017	16	(34)		(54)	(32)
Other comprehensive income (loss)	16	(34)		(54)	(32)
Comprehensive loss	$ (8,441)	$ (9,160)		$ (15,666)	$ (16,843)

[1]	See Note 3 for a summary of adjustments.

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (UNAUDITED) (PARENTHETICAL) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net change in unrealized gain on marketable securities, tax	$ 0	$ 0	$ 0	$ 0

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (UNAUDITED) - 6 months ended Jun. 30, 2018 - USD ($) shares in Thousands, $ in Thousands	Total		Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning Balance at Dec. 31, 2017	$ 317,305	[1]	$ 530	$ 419,628	$ (63)	$ (102,790)	[1]
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 loss	(54)				(54)
Net loss	(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

[1]	See Note 3 for a summary of adjustments.

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net loss		$ (15,612)	$ (16,811)	[1]
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization		10,931	9,699	[1]
Change in fair value of common stock warrant liability	[1]		3,490
Change in fair value of contingent consideration		190	189	[1]
Stock-based compensation		9,367	3,836	[1]
(Accretion) amortization of purchase discounts/premiums on marketable securities, net		(304)	133	[1]
Net foreign currency losses		403
Deferred income taxes		(307)	(171)	[1]
Benefit from doubtful accounts receivable		(43)
Changes in operating assets and liabilities:
Accounts receivable		652	(1,231)	[1]
Prepaid expenses and other current assets		(2,624)	(878)	[1]
Other assets		(3,454)	(2,492)	[1]
Accounts payable		(4,910)	(2,487)	[1]
Accrued expenses and other current liabilities		(1,131)	(2,082)	[1]
Deferred revenue		13,150	9,086	[1]
Other long-term liabilities		195	(114)	[1]
Net cash provided by operating activities		6,503	167	[1]
Cash flows from investing activities
Purchases of marketable securities		(66,914)	(25,399)	[1]
Proceeds from maturities of marketable securities		62,449	24,620	[1]
Capitalized software development costs		(3,113)	(1,983)	[1]
Purchases of property and equipment		(3,696)	(1,118)	[1]
Net cash used in investing activities		(11,274)	(3,880)	[1]
Cash flows from financing activities
Principal payments on capital lease obligations		(443)	(549)	[1]
Proceeds from exercises of stock options		6,065	5,761	[1]
Acquisition of common stock for tax withholding obligations		(3,213)
Payments of initial public offering costs	[1]		(110)
Net cash provided by financing activities		2,409	5,102	[1]
Net increase (decrease) in cash, cash equivalents, and restricted cash		(2,362)	1,389	[1]
Cash, cash equivalents, and restricted cash, beginning of period		31,504	22,518	[1]
Cash, cash equivalents, and restricted cash, end of period		29,142	23,907	[1]
Reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets
Cash and cash equivalents at end of period		28,682	23,507	[1]
Restricted cash included within prepaid expenses and other current assets at end of period		200
Restricted cash included within other assets at end of period		260	400	[1]
Cash, cash equivalents, and restricted cash, end of period		29,142	23,907	[1]
Non-cash financing and investing activities
Stock-based compensation capitalized for software development		191	60
Net exercise of stock warrants			14,870
Capitalized software development costs included in accounts payable and accrued expenses and other current liabilities at end of period		264	96
Purchases of property and equipment included in accounts payable and accrued expenses and other current liabilities at end of period		$ 125	$ 465

[1]	See Note 3 for a summary of adjustments.

Company Overview

Company Overview	6 Months Ended
Company Overview	Jun. 30, 2018
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 Los Angeles and has offices in Chicago, Atlanta, New York, Vancouver, London, Paris, Frankfurt, Sydney, Melbourne, Ede, and Singapore.

Basis of Presentation, Signific

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements	6 Months Ended
	Jun. 30, 2018
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, 2017 filed with the Securities and Exchange Commission (“SEC”) on March 8, 2018. 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, 2017 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, 2018 are not necessarily indicative of the results expected for the full year ending December 31, 2018. 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. Reclassifications Certain prior-period amounts have been reclassified to conform to the current-period presentation. These reclassifications had no impact on the previously-reported consolidated results of operations or stockholders' equity. 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, 2017. On January 1, 2018, the Company adopted Accounting Standards Codification No. 606, Revenue from Contracts with Customers, Revenue recognition Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration the Company expects to receive in exchange for those products or services. The Company enters into contracts that can include various combinations of subscription and support services and professional services, which are generally capable of being distinct and accounted for as separate performance obligations. The Company’s agreements do not contain any refund provisions other than in the event of the Company’s non-performance or breach. The Company determines revenue recognition through the following steps: • Identification of the contract, or contracts, with a customer • Identification of the performance obligations in the contract • Determination of the transaction price • Allocation of the transaction price to the performance obligations in the contract • Recognition of revenue when, or as, the Company satisfies a performance obligation Subscription and support revenue – Customers pay subscription and support fees for access to the Company’s SaaS platform generally for a one-year period. In more limited cases, customers may pay for up to three years in advance. Fees are based on a number of factors, including the solutions subscribed for by the customer and the number of users having access to the solutions. Subscription services, which allow customers to use hosted software over the contract period without taking possession of the software, are considered distinct performance obligations and are recognized ratably as the Company transfers control evenly over the contract period. Subscription and support revenue also includes software and related maintenance and support fees on legacy BlackLine solutions and Runbook Company B.V. (“Runbook”) software. Software licenses for legacy BlackLine solutions and Runbook software provide the customer with a right to use the software as it exists when made available to the customer. Customers may have purchased perpetual licenses or term based licenses, which provide customers with the same functionality and differ mainly in the duration over which the customer benefits from the software. Software licenses are bundled with software maintenance and support, and the transaction price of the contract is allocated between the software licenses and the software maintenance and support. Maintenance and support convey rights to new software and upgrades released over the contract period and provide support, tools, and training to help customers deploy and use products more efficiently. Software licenses are considered distinct performance obligations and revenue is recognized at a point in time when control of the license has transferred and the license period commences. Maintenance and support are distinct performance obligations that are satisfied over time, and revenue is recognized ratably over the contract period as customers simultaneously consume and receive benefits. Professional services revenue – Professional services consist of implementation and consulting services to assist the Company’s customers as they deploy its solutions. These services are considered distinct performance obligations. Professional services do not result in significant customization of the subscription service. The Company applies the practical expedient to recognize professional services revenue when it has the right to invoice based on time and materials incurred. Significant judgments – The Company’s contracts with customers often include promises to transfer multiple products and services. Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. Judgment is also required to determine the stand alone selling price (“SSP”) for each distinct performance obligation. The Company typically has more than one SSP for its SaaS solutions and professional services. Additionally, management has determined that there are no third-party offerings reasonably comparable to the Company’s solutions. Therefore, the Company determines the SSPs of subscriptions to the SaaS solutions and professional services based on numerous factors including the Company’s overall pricing objectives, geography, customer size and number of users, and discounting practices . The Company uses historical maintenance renewal fees to estimate SSP for maintenance and support fees bundled with software licenses. The Company uses the residual method to estimate SSP of software licenses, because license pricing is highly variable and not sold separately from maintenance and support. Contract balances – Timing of revenue recognition may differ from the timing of invoicing to customers. The Company records an unbilled receivable when revenue is recognized prior to invoicing, and deferred revenue when revenue is recognized subsequent to invoicing. The Company generally invoices customers annually at the beginning of each annual contract period. The Company records a receivable related to revenue recognized for multi-year agreements as it has an unconditional right to invoice and receive payment in the future related to those services. Deferred revenue is comprised mainly of billings related to the Company’s SaaS solutions in advance of revenue being recognized. Deferred revenue also includes payments for: professional services to be performed in the future; legacy BlackLine maintenance and support; Runbook maintenance, support, license, and implementation; and other offerings for which the Company has been paid in advance and earns the revenue when the Company transfers control of the product or service. Changes in deferred revenue for the six months ended June 30, 2018 and 2017 were primarily due to additional billings in the periods, partially offset by revenue recognized of $74.7 million and $57.7 million, respectively, that was previously included in the deferred revenue balance at December 31, 2017 and 2016, respectively. The transaction price is generally determined by the stated fixed fees in the contract, excluding any related sales taxes. Transaction price allocated to remaining performance obligations represents contracted revenue that has not yet been recognized (“contracted not recognized”), which includes deferred revenue and amounts that will be invoiced and recognized as revenue in future periods. Contracted not recognized revenue was $255.3 million at June 30, 2018, of which the Company expects to recognize approximately 63% over the next 12 months and the remainder thereafter. Fees are generally due and payable upon receipt of invoice or within 30 days. None of the Company’s contracts includes a significant financing component. Assets recognized from the costs to obtain a contract with a customer – The Company recognizes an asset for the incremental and recoverable costs of obtaining a contract with a customer if the Company expects the benefit of those costs to be one year or longer. The Company has determined that certain sales incentive programs to the Company’s employees ("deferred customer contract acquisition costs") and its partners ("partner referral fees") meet the requirements to be capitalized. Deferred customer acquisition costs related to new revenue contracts and upsells are deferred and then amortized straight line over the expected period of benefit that the Company has determined to be five years, based upon both the product turnover rate and estimated customer life. Partner referral fees are deferred and then amortized on a straight-line basis over the related contractual period, as the fees for renewals are commensurate with fees incurred for the initial contract. Deferred customer acquisition costs and partner referral fees are included within other assets and prepaid expenses and other current assets, respectively, on the condensed consolidated balance sheets. There were no impairment losses in relation to the costs capitalized for the periods presented. Amortization expense related to the asset recognized from the costs to obtain a contract with a customer is included in sales and marketing expenses in the condensed consolidated statements of operations and was $5.7 million and $3.7 million for the quarters ended June 30, 2018 and 2017, respectively. For the six months ended June 30, 2018 and 2017, amortization expense related to the asset recognized from the costs to obtain a contract with a customer was $11.0 million and $7.0 million, respectively. Recently issued accounting pronouncements not yet adopted In February 2016, the Financial Accounting Standards Board (“FASB”) issued new guidance which significantly changes the accounting for leases. The new guidance requires a lessee recognize in the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. If a lessee makes this election, it should recognize lease expense for such leases generally on a straight-line basis over the lease term. For income statement purposes, the new guidance retained a dual model, requiring leases to be classified as either operating or financing. Operating leases will result in straight-line expense while finance leases will result in a front-loaded expense pattern similar to existing capital lease guidance. For statement of cash flow purposes, the new guidance also retained the existing dual method, where cash payments for operating leases are reflected in cash flows from operating activities and principal and interest payments for finance leases are reflected in cash flows from financing activities and cash flows from operating activities, respectively. The new guidance is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. The new guidance requires the recognition and measurement of leases at the beginning of the earliest period presented using a modified retrospective approach. The use of the modified retrospective approach allows an entity to use a number of practical expedients in the application of this new guidance. Although the Company is evaluating the impact of adopting this guidance on its consolidated financial statements, the Company expects that most of its operating lease commitments will be recognized as operating lease liabilities and right-of-use assets upon adoption of the new guidance. In June 2016, the 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 March 2017, the FASB issued guidance which shortens the amortization period for certain purchased callable debt securities held at a premium. Under this new guidance, an entity would shorten the amortization period of the premium to the earliest call date. This guidance is effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. Early adoption is permitted, including adoption in an interim period. The Company has not determined the impact of this guidance on its consolidated financial statements. 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 guidance will be effective for the Company beginning in the first quarter of 2019 with early adoption permitted, and would be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the tax rate as a result of the Tax Act is recognized. The Company does not expect the adoption of this ASU to have a material impact on its consolidated financial statements. In June 2018, the FASB issued guidance which expands the scope of Accounting Standards Codification Topic 718, Compensation—Stock Compensation Recently adopted accounting pronouncements In May 2014, the FASB issued guidance related to revenue from contracts with customers. Under this guidance, revenue is recognized when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. In addition, the standard requires disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The Company adopted the new revenue guidance effective January 1, 2018 using the full retrospective method to restate each prior reporting period presented. The Company implemented internal controls and key system functionality to enable the preparation of financial information and adoption. The most significant impact of the standard relates to the Company’s accounting for the incremental costs of obtaining a contract, such as sales commissions. Under the new revenue standard, commissions are recognized over an estimated period of benefit of five years rather than over the non-cancelable contract term. The standard also impacted the Company’s accounting for on-premise solutions which includes software license, maintenance and support fees on Runbook solutions. Under the new guidance, the Company recognizes software license revenue at the time of delivery rather than over the maintenance term. Revenue recognition related to subscription, support, and professional services fees for access to the Company’s SaaS platform is substantially unchanged. Adoption of the standard using the full retrospective method required the Company to restate certain previously reported results; see Note 3 – “Revenues” for additional information regarding the impacts to previously reported results. In November 2016, the FASB issued guidance which requires that restricted cash and restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning and ending total amounts shown on the statement of cash flows. The Company adopted this guidance effective January 1, 2018, and all prior periods have been restated, as required by the new standard. In February 2017, the FASB issued guidance which simplifies the subsequent measurement of goodwill by no longer requiring an entity to determine goodwill impairment by calculating the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination. Under this new guidance, an entity would perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and would recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized would not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity would consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. Under the new guidance, an entity continues to have the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This guidance is effective for fiscal years beginning after December 15, 2019 and interim periods within those years. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company adopted this standard effective January 1, 2018, and the adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In May 2017, the FASB issued guidance to clarify which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. Under this guidance an entity should account for the effects of a modification unless all the following are met: 1) The fair value of the modified award is the same as the fair value of the original award immediately before the original award is modified. If the modification does not affect any of the inputs to the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification; 2) The vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified; and 3) The classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. The Company adopted this standard effective January 1, 2018, and will apply this guidance to modifications of stock-based compensation arrangements, if any, after this date. T he adoption of this standard did not have a material impact on the Company’s consolidated financial statements.

Revenues

Revenues	6 Months Ended
Revenues	Jun. 30, 2018
Revenue From Contract With Customer [Abstract]
Revenues	Note 3 – Revenues The Company adopted the new revenue standard effective January 1, 2018 using the full retrospective method to restate each prior reporting period presented. Impacts to previously reported results The following table presents the effect of the adoption of ASC 606 on the Company’s condensed consolidated balance sheet (unaudited): December 31, 2017 As Reported Adjustments As Adjusted (in thousands) Accounts receivable, net $ 61,589 $ 329 $ 61,918 Prepaid expenses and other current assets $ 19,785 $ (5,829 ) $ 13,956 Total current assets $ 193,954 $ (5,500 ) $ 188,454 Other assets $ 1,391 $ 25,429 $ 26,820 Total assets $ 440,884 $ 19,929 $ 460,813 Deferred revenue $ 106,903 $ (2,719 ) $ 104,184 Total current liabilities $ 137,039 $ (2,719 ) $ 134,320 Deferred tax liabilities, net $ 1,328 $ 415 $ 1,743 Deferred revenue, noncurrent $ 912 $ (444 ) $ 468 Total liabilities $ 146,256 $ (2,748 ) $ 143,508 Accumulated deficit $ (125,467 ) $ 22,677 $ (102,790 ) Total stockholders' equity $ 294,628 $ 22,677 $ 317,305 Total liabilities and stockholders' equity $ 440,884 $ 19,929 $ 460,813 The following table presents the effect of the adoption of ASC 606 on the Company’s condensed consolidated statement of operations (unaudited): Quarter Ended June 30, 2017 Six Months Ended June 30, 2017 As Reported Adjustments As Adjusted As Reported Adjustments As Adjusted (in thousands, except per share data) Revenues Subscription and support $ 40,244 $ (412 ) $ 39,832 $ 77,295 $ (905 ) $ 76,390 Professional services 2,049 100 2,149 3,632 140 3,772 Total revenues $ 42,293 $ (312 ) $ 41,981 $ 80,927 $ (765 ) $ 80,162 Cost of revenues Subscription and support $ 8,245 $ (18 ) $ 8,227 $ 16,022 $ (40 ) $ 15,982 Total cost of revenues $ 10,375 $ (18 ) $ 10,357 $ 19,607 $ (40 ) $ 19,567 Gross profit $ 31,918 $ (294 ) $ 31,624 $ 61,320 $ (725 ) $ 60,595 Operating expenses Sales and marketing $ 25,125 $ (1,133 ) $ 23,992 $ 48,621 $ (2,809 ) $ 45,812 General and administrative $ 8,636 $ (170 ) $ 8,466 $ 16,889 $ (170 ) $ 16,719 Total operating expenses $ 39,770 $ (1,303 ) $ 38,467 $ 77,467 $ (2,979 ) $ 74,488 Loss from operations $ (7,852 ) $ 1,009 $ (6,843 ) $ (16,147 ) $ 2,254 $ (13,893 ) Loss before income taxes $ (10,101 ) $ 1,009 $ (9,092 ) $ (19,176 ) $ 2,254 $ (16,922 ) Provision for (benefit from) income taxes $ 13 $ 21 $ 34 $ (52 ) $ (59 ) $ (111 ) Net loss $ (10,114 ) $ 988 $ (9,126 ) $ (19,124 ) $ 2,313 $ (16,811 ) Basic net loss per share $ (0.20 ) $ 0.02 $ (0.18 ) $ (0.37 ) $ 0.04 $ (0.33 ) Diluted net loss per share $ (0.20 ) $ 0.02 $ (0.18 ) $ (0.37 ) $ 0.04 $ (0.33 ) The following table presents the effect of the adoption of ASC 606 on the Company’s condensed consolidated statement of cash flows (unaudited): Six Months Ended June 30, 2017 As Reported Adjustments As Adjusted (in thousands) Net loss $ (19,124 ) $ 2,313 $ (16,811 ) Adjustments to reconcile net loss to net cash provided by (used in) operating activities: Deferred income taxes $ (118 ) $ (53 ) $ (171 ) Prepaid expenses and other current assets $ (491 ) $ (387 ) $ (878 ) Other assets $ (68 ) $ (2,424 ) $ (2,492 ) Deferred revenue $ 8,535 $ 551 $ 9,086 There was no effect to net cash provided by (used in) operating, investing, or financing activities. Disaggregation of Revenues The Company disaggregates its revenue from contracts with customers by geographic location and market, 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 Company defines the enterprise market as companies with greater than $500 million in annual revenues and defines mid-market as companies with between $50 and $500 million in annual revenues. The following table sets forth the Company’s revenues by geographic region (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 As Adjusted As Adjusted United States $ 43,662 $ 34,063 $ 84,674 $ 65,278 International 11,792 7,918 22,064 14,884 $ 55,454 $ 41,981 $ 106,738 $ 80,162 The following table sets forth the Company’s revenues by market (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 As Adjusted As Adjusted Enterprise $ 46,512 $ 35,199 $ 89,023 $ 67,237 Mid-market 8,942 6,782 17,715 12,925 $ 55,454 $ 41,981 $ 106,738 $ 80,162

Balance Sheet Components

Balance Sheet Components	6 Months Ended
Balance Sheet Components	Jun. 30, 2018
Balance Sheet Related Disclosures [Abstract]
Balance Sheet Components	Note 4 – Balance Sheet Components Investments in Marketable Securities Investments in marketable securities presented within current assets on the consolidated balance sheet consisted of the following: June 30, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Marketable securities U.S. treasury securities $ 21,793 $ — $ (50 ) $ 21,743 Corporate bonds 30,304 — (67 ) 30,237 Commercial paper 34,211 — — 34,211 $ 86,308 $ — $ (117 ) $ 86,191 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Marketable securities U.S. treasury securities $ 21,454 $ — $ (19 ) $ 21,435 Corporate bonds 32,437 — (43 ) 32,394 Commercial paper 25,048 — — 25,048 Asset-backed securities 2,600 — (1 ) 2,599 $ 81,539 $ — $ (63 ) $ 81,476 During the quarters and six months ended June 30, 2018 and 2017, there were no sales of marketable securities and, accordingly, there were no realized gains or losses 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 $0.3 million for the quarter and six months ended June 30, 2018, 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 not material for the quarter and six months ended June 30, 2017. 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, 2018 Amortized Cost Fair Value (in thousands) Maturing within 1 year $ 79,394 $ 79,307 Maturing between 1 year and 2 years 6,914 6,884 $ 86,308 $ 86,191 Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands): June 30, December 31, 2018 2017 Partner referral fees $ 8,750 $ 7,945 Restricted cash 200 400 Other prepaid expenses and other current assets 7,653 5,611 $ 16,603 $ 13,956 Other Assets Other assets consisted of the following (in thousands): June 30, December 31, 2018 2017 Deferred customer contract acquisition costs $ 28,486 $ 25,338 Restricted cash 260 — Other assets 1,788 1,482 $ 30,534 $ 26,820 Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities were comprised of the following (in thousands): June 30, December 31, 2018 2017 Accrued salaries and employee benefits $ 11,249 $ 11,945 Partner referral fees 2,747 2,991 Accrued income and other taxes payable 2,112 1,798 Accrued professional services costs 401 407 Short-term portion of capital lease — 443 Short-term tenant improvement allowance 475 475 Other accrued expenses and current liabilities 2,264 2,815 $ 19,248 $ 20,874

Fair Value Measurements

Fair Value Measurements	6 Months Ended
Fair Value Measurements	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 5 – 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, 2018 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 20,279 $ — $ — $ 20,279 Marketable securities U.S. treasury securities 21,743 — — 21,743 Corporate bonds — 30,237 — 30,237 Commercial paper — 34,211 — 34,211 Total assets $ 42,022 $ 64,448 $ — $ 106,470 Liabilities Contingent consideration $ — $ — $ 6,056 $ 6,056 Total liabilities $ — $ — $ 6,056 $ 6,056 December 31, 2017 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 21,247 $ — $ — $ 21,247 Marketable securities U.S. treasury securities 21,435 — — 21,435 Corporate bonds — 32,394 — 32,394 Commercial paper — 25,048 — 25,048 Asset-backed securities — 2,599 — 2,599 Total assets $ 42,682 $ 60,041 $ — $ 102,723 Liabilities Contingent consideration $ — $ — $ 5,866 $ 5,866 Total liabilities $ — $ — $ 5,866 $ 5,866 The following table summarizes the changes in the common stock warrant liability (in thousands): Quarter Ended June 30, 2017 Six Months Ended June 30, 2017 Beginning fair value $ 12,380 $ 11,380 Change in fair value 2,490 3,490 Exercise of stock warrants (14,870 ) (14,870 ) Ending fair value $ — $ — In May 2017, warrants to purchase 499,999 shares of common stock were net exercised resulting in the issuance of 428,033 shares of common stock and, accordingly, there will be no further changes in the fair value. The following table summarizes the changes in the contingent consideration liability (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Beginning fair value $ 5,978 $ 5,331 $ 5,866 $ 5,238 Change in fair value 78 96 190 189 Ending fair value $ 6,056 $ 5,427 $ 6,056 $ 5,427

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 6 – Commitments and Contingencies Operating leases —The Company has various non-cancelable operating leases for its corporate and international offices, as well as non-cancelable equipment leases. These office and equipment leases expire at various times through 2024. Certain lease agreements contain renewal options, rent abatement, and escalation clauses. The Company recognizes rent expense on a straight-line basis over the lease term, commencing when the Company takes possession of the property or equipment. Certain of the Company’s office leases entitle the Company to receive a tenant allowance from the landlord. The Company records tenant allowances as a deferred rent credit, which the Company amortizes on a straight-line basis, as a reduction of rent expense, over the term of the underlying lease. 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 $6.1 million and $5.9 million at June 30, 2018 and December 31, 2017, respectively. 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, 2018 and December 31, 2017, 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
Equity Awards	Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity Awards	Note 7 – 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, 2018 2017 2018 2017 Cost of revenues $ 682 $ 271 $ 1,520 $ 521 Sales and marketing 2,308 748 3,745 1,408 Research and development 675 215 1,104 298 General and administrative 1,728 753 2,998 1,609 $ 5,393 $ 1,987 $ 9,367 $ 3,836 For the quarters ended June 30, 2018 and 2017, stock-based compensation capitalized as an asset was $0.1 million and $30,000, respectively. For the six months ended June 30, 2018 and 2017, stock-based compensation capitalized as an asset was $0.2 million and $0.1 million, respectively. Restricted stock units The following table summarizes activity for restricted stock units (in thousands): Nonvested at December 31, 2017 2 Granted 1,110 Vested (2 ) Forfeited/canceled (21 ) Nonvested at June 30, 2018 1,089 Stock options The following table summarizes activity for awards that contain service-only vesting conditions : Outstanding at December 31, 2017 5,019 Granted 571 Exercised (937 ) Forfeited/canceled (138 ) Outstanding at June 30, 2018 4,515

Income Taxes

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 8 – 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 June 30, 2018 and 2017, the Company recorded $0.1 million and $34,000, respectively, in income tax expense. The increase in the income tax expense for the quarter ended June 30, 2018, compared to the quarter ended June 30, 2017, was related to a reduction in net operating losses in the Company’s foreign jurisdictions for the current period. For the quarter ended June 30, 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, 2018 and 2017, the Company recorded $0.1 million in income tax expense and $0.1 million in income tax benefits, respectively. The increase in the income tax expense for the six months ended June 30, 2018, compared to the six months ended June 30, 2017, 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, 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
Net Loss per Share	Jun. 30, 2018
Earnings Per Share [Abstract]
Net Loss per Share	Note 9 – 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, 2018 2017 2018 2017 Numerator: Net loss $ (8,457 ) $ (9,126 ) $ (15,612 ) $ (16,811 ) Denominator: Weighted average shares 53,555 51,842 53,354 51,563 Add: Dilutive effect of securities — — — — Shares used to calculate diluted net loss per share 53,555 51,842 53,354 51,563 Basic net loss per share $ (0.16 ) $ (0.18 ) $ (0.29 ) $ (0.33 ) Diluted net loss per share $ (0.16 ) $ (0.18 ) $ (0.29 ) $ (0.33 ) 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, 2018 2017 Stock options with service-only vesting conditions 4,515 5,126 Stock options with performance conditions 683 683 Restricted stock units 1,089 — Total shares excluded from net loss per share 6,287 5,809

Subsequent Events

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	Note 10 – Subsequent Events On August 8, 2018, the Compensation Committee of the Board of Directors of BlackLine, Inc. approved stock option grants to employees totaling 0.2 million shares. Each stock option entitles the recipient to receive one share of common stock upon exercise of the vested award and payment of the exercise price. The stock options will vest as to one-fourth of the total number of options awarded on the first anniversary of August 20, 2018 and quarterly thereafter for 12 consecutive quarters. On August 8, 2018, the Compensation Committee of the Board of Directors of BlackLine, Inc. approved restricted stock unit grants to employees totaling 0.2 million shares. Each restricted stock unit entitles the recipient to receive one share of common stock upon vesting of the award. The restricted stock units will vest as to one-fourth of the total number of units awarded on the first anniversary of August 20, 2018 and quarterly thereafter for 12 consecutive quarters.

Basis of Presentation, Signif18

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2018
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.
Reclassifications	Reclassifications Certain prior-period amounts have been reclassified to conform to the current-period presentation. These reclassifications had no impact on the previously-reported consolidated results of operations or stockholders' equity.
Revenue Recognition	Revenue recognition Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration the Company expects to receive in exchange for those products or services. The Company enters into contracts that can include various combinations of subscription and support services and professional services, which are generally capable of being distinct and accounted for as separate performance obligations. The Company’s agreements do not contain any refund provisions other than in the event of the Company’s non-performance or breach. The Company determines revenue recognition through the following steps: • Identification of the contract, or contracts, with a customer • Identification of the performance obligations in the contract • Determination of the transaction price • Allocation of the transaction price to the performance obligations in the contract • Recognition of revenue when, or as, the Company satisfies a performance obligation Subscription and support revenue – Customers pay subscription and support fees for access to the Company’s SaaS platform generally for a one-year period. In more limited cases, customers may pay for up to three years in advance. Fees are based on a number of factors, including the solutions subscribed for by the customer and the number of users having access to the solutions. Subscription services, which allow customers to use hosted software over the contract period without taking possession of the software, are considered distinct performance obligations and are recognized ratably as the Company transfers control evenly over the contract period. Subscription and support revenue also includes software and related maintenance and support fees on legacy BlackLine solutions and Runbook Company B.V. (“Runbook”) software. Software licenses for legacy BlackLine solutions and Runbook software provide the customer with a right to use the software as it exists when made available to the customer. Customers may have purchased perpetual licenses or term based licenses, which provide customers with the same functionality and differ mainly in the duration over which the customer benefits from the software. Software licenses are bundled with software maintenance and support, and the transaction price of the contract is allocated between the software licenses and the software maintenance and support. Maintenance and support convey rights to new software and upgrades released over the contract period and provide support, tools, and training to help customers deploy and use products more efficiently. Software licenses are considered distinct performance obligations and revenue is recognized at a point in time when control of the license has transferred and the license period commences. Maintenance and support are distinct performance obligations that are satisfied over time, and revenue is recognized ratably over the contract period as customers simultaneously consume and receive benefits. Professional services revenue – Professional services consist of implementation and consulting services to assist the Company’s customers as they deploy its solutions. These services are considered distinct performance obligations. Professional services do not result in significant customization of the subscription service. The Company applies the practical expedient to recognize professional services revenue when it has the right to invoice based on time and materials incurred. Significant judgments – The Company’s contracts with customers often include promises to transfer multiple products and services. Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. Judgment is also required to determine the stand alone selling price (“SSP”) for each distinct performance obligation. The Company typically has more than one SSP for its SaaS solutions and professional services. Additionally, management has determined that there are no third-party offerings reasonably comparable to the Company’s solutions. Therefore, the Company determines the SSPs of subscriptions to the SaaS solutions and professional services based on numerous factors including the Company’s overall pricing objectives, geography, customer size and number of users, and discounting practices . The Company uses historical maintenance renewal fees to estimate SSP for maintenance and support fees bundled with software licenses. The Company uses the residual method to estimate SSP of software licenses, because license pricing is highly variable and not sold separately from maintenance and support. Contract balances – Timing of revenue recognition may differ from the timing of invoicing to customers. The Company records an unbilled receivable when revenue is recognized prior to invoicing, and deferred revenue when revenue is recognized subsequent to invoicing. The Company generally invoices customers annually at the beginning of each annual contract period. The Company records a receivable related to revenue recognized for multi-year agreements as it has an unconditional right to invoice and receive payment in the future related to those services. Deferred revenue is comprised mainly of billings related to the Company’s SaaS solutions in advance of revenue being recognized. Deferred revenue also includes payments for: professional services to be performed in the future; legacy BlackLine maintenance and support; Runbook maintenance, support, license, and implementation; and other offerings for which the Company has been paid in advance and earns the revenue when the Company transfers control of the product or service. Changes in deferred revenue for the six months ended June 30, 2018 and 2017 were primarily due to additional billings in the periods, partially offset by revenue recognized of $74.7 million and $57.7 million, respectively, that was previously included in the deferred revenue balance at December 31, 2017 and 2016, respectively. The transaction price is generally determined by the stated fixed fees in the contract, excluding any related sales taxes. Transaction price allocated to remaining performance obligations represents contracted revenue that has not yet been recognized (“contracted not recognized”), which includes deferred revenue and amounts that will be invoiced and recognized as revenue in future periods. Contracted not recognized revenue was $255.3 million at June 30, 2018, of which the Company expects to recognize approximately 63% over the next 12 months and the remainder thereafter. Fees are generally due and payable upon receipt of invoice or within 30 days. None of the Company’s contracts includes a significant financing component. Assets recognized from the costs to obtain a contract with a customer – The Company recognizes an asset for the incremental and recoverable costs of obtaining a contract with a customer if the Company expects the benefit of those costs to be one year or longer. The Company has determined that certain sales incentive programs to the Company’s employees ("deferred customer contract acquisition costs") and its partners ("partner referral fees") meet the requirements to be capitalized. Deferred customer acquisition costs related to new revenue contracts and upsells are deferred and then amortized straight line over the expected period of benefit that the Company has determined to be five years, based upon both the product turnover rate and estimated customer life. Partner referral fees are deferred and then amortized on a straight-line basis over the related contractual period, as the fees for renewals are commensurate with fees incurred for the initial contract. Deferred customer acquisition costs and partner referral fees are included within other assets and prepaid expenses and other current assets, respectively, on the condensed consolidated balance sheets. There were no impairment losses in relation to the costs capitalized for the periods presented. Amortization expense related to the asset recognized from the costs to obtain a contract with a customer is included in sales and marketing expenses in the condensed consolidated statements of operations and was $5.7 million and $3.7 million for the quarters ended June 30, 2018 and 2017, respectively. For the six months ended June 30, 2018 and 2017, amortization expense related to the asset recognized from the costs to obtain a contract with a customer was $11.0 million and $7.0 million, respectively.
Recently Issued Accounting Pronouncements Not Yet Adopted	Recently issued accounting pronouncements not yet adopted In February 2016, the Financial Accounting Standards Board (“FASB”) issued new guidance which significantly changes the accounting for leases. The new guidance requires a lessee recognize in the balance sheet a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. If a lessee makes this election, it should recognize lease expense for such leases generally on a straight-line basis over the lease term. For income statement purposes, the new guidance retained a dual model, requiring leases to be classified as either operating or financing. Operating leases will result in straight-line expense while finance leases will result in a front-loaded expense pattern similar to existing capital lease guidance. For statement of cash flow purposes, the new guidance also retained the existing dual method, where cash payments for operating leases are reflected in cash flows from operating activities and principal and interest payments for finance leases are reflected in cash flows from financing activities and cash flows from operating activities, respectively. The new guidance is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. The new guidance requires the recognition and measurement of leases at the beginning of the earliest period presented using a modified retrospective approach. The use of the modified retrospective approach allows an entity to use a number of practical expedients in the application of this new guidance. Although the Company is evaluating the impact of adopting this guidance on its consolidated financial statements, the Company expects that most of its operating lease commitments will be recognized as operating lease liabilities and right-of-use assets upon adoption of the new guidance. In June 2016, the 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 March 2017, the FASB issued guidance which shortens the amortization period for certain purchased callable debt securities held at a premium. Under this new guidance, an entity would shorten the amortization period of the premium to the earliest call date. This guidance is effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. Early adoption is permitted, including adoption in an interim period. The Company has not determined the impact of this guidance on its consolidated financial statements. 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 guidance will be effective for the Company beginning in the first quarter of 2019 with early adoption permitted, and would be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the tax rate as a result of the Tax Act is recognized. The Company does not expect the adoption of this ASU to have a material impact on its consolidated financial statements. In June 2018, the FASB issued guidance which expands the scope of Accounting Standards Codification Topic 718, Compensation—Stock Compensation
Recently Adopted Accounting Pronouncements	Recently adopted accounting pronouncements In May 2014, the FASB issued guidance related to revenue from contracts with customers. Under this guidance, revenue is recognized when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. In addition, the standard requires disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The Company adopted the new revenue guidance effective January 1, 2018 using the full retrospective method to restate each prior reporting period presented. The Company implemented internal controls and key system functionality to enable the preparation of financial information and adoption. The most significant impact of the standard relates to the Company’s accounting for the incremental costs of obtaining a contract, such as sales commissions. Under the new revenue standard, commissions are recognized over an estimated period of benefit of five years rather than over the non-cancelable contract term. The standard also impacted the Company’s accounting for on-premise solutions which includes software license, maintenance and support fees on Runbook solutions. Under the new guidance, the Company recognizes software license revenue at the time of delivery rather than over the maintenance term. Revenue recognition related to subscription, support, and professional services fees for access to the Company’s SaaS platform is substantially unchanged. Adoption of the standard using the full retrospective method required the Company to restate certain previously reported results; see Note 3 – “Revenues” for additional information regarding the impacts to previously reported results. In November 2016, the FASB issued guidance which requires that restricted cash and restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning and ending total amounts shown on the statement of cash flows. The Company adopted this guidance effective January 1, 2018, and all prior periods have been restated, as required by the new standard. In February 2017, the FASB issued guidance which simplifies the subsequent measurement of goodwill by no longer requiring an entity to determine goodwill impairment by calculating the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination. Under this new guidance, an entity would perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and would recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized would not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity would consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. Under the new guidance, an entity continues to have the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This guidance is effective for fiscal years beginning after December 15, 2019 and interim periods within those years. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company adopted this standard effective January 1, 2018, and the adoption of this standard did not have a material impact on the Company’s consolidated financial statements. In May 2017, the FASB issued guidance to clarify which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. Under this guidance an entity should account for the effects of a modification unless all the following are met: 1) The fair value of the modified award is the same as the fair value of the original award immediately before the original award is modified. If the modification does not affect any of the inputs to the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification; 2) The vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified; and 3) The classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. The Company adopted this standard effective January 1, 2018, and will apply this guidance to modifications of stock-based compensation arrangements, if any, after this date. T he adoption of this standard did not have a material impact on the Company’s consolidated financial statements.

Revenues (Tables)

Revenues (Tables)	6 Months Ended
Revenues (Tables)	Jun. 30, 2018
Schedule of Disaggregation of Revenues by Geographic Region and Market	The following table sets forth the Company’s revenues by geographic region (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 As Adjusted As Adjusted United States $ 43,662 $ 34,063 $ 84,674 $ 65,278 International 11,792 7,918 22,064 14,884 $ 55,454 $ 41,981 $ 106,738 $ 80,162 The following table sets forth the Company’s revenues by market (in thousands): Quarter Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 As Adjusted As Adjusted Enterprise $ 46,512 $ 35,199 $ 89,023 $ 67,237 Mid-market 8,942 6,782 17,715 12,925 $ 55,454 $ 41,981 $ 106,738 $ 80,162
Adoption of ASC 606
Effect of Adoption of ASC 606 on Impacts to Previously Reported Results	Impacts to previously reported results The following table presents the effect of the adoption of ASC 606 on the Company’s condensed consolidated balance sheet (unaudited): December 31, 2017 As Reported Adjustments As Adjusted (in thousands) Accounts receivable, net $ 61,589 $ 329 $ 61,918 Prepaid expenses and other current assets $ 19,785 $ (5,829 ) $ 13,956 Total current assets $ 193,954 $ (5,500 ) $ 188,454 Other assets $ 1,391 $ 25,429 $ 26,820 Total assets $ 440,884 $ 19,929 $ 460,813 Deferred revenue $ 106,903 $ (2,719 ) $ 104,184 Total current liabilities $ 137,039 $ (2,719 ) $ 134,320 Deferred tax liabilities, net $ 1,328 $ 415 $ 1,743 Deferred revenue, noncurrent $ 912 $ (444 ) $ 468 Total liabilities $ 146,256 $ (2,748 ) $ 143,508 Accumulated deficit $ (125,467 ) $ 22,677 $ (102,790 ) Total stockholders' equity $ 294,628 $ 22,677 $ 317,305 Total liabilities and stockholders' equity $ 440,884 $ 19,929 $ 460,813 The following table presents the effect of the adoption of ASC 606 on the Company’s condensed consolidated statement of operations (unaudited): Quarter Ended June 30, 2017 Six Months Ended June 30, 2017 As Reported Adjustments As Adjusted As Reported Adjustments As Adjusted (in thousands, except per share data) Revenues Subscription and support $ 40,244 $ (412 ) $ 39,832 $ 77,295 $ (905 ) $ 76,390 Professional services 2,049 100 2,149 3,632 140 3,772 Total revenues $ 42,293 $ (312 ) $ 41,981 $ 80,927 $ (765 ) $ 80,162 Cost of revenues Subscription and support $ 8,245 $ (18 ) $ 8,227 $ 16,022 $ (40 ) $ 15,982 Total cost of revenues $ 10,375 $ (18 ) $ 10,357 $ 19,607 $ (40 ) $ 19,567 Gross profit $ 31,918 $ (294 ) $ 31,624 $ 61,320 $ (725 ) $ 60,595 Operating expenses Sales and marketing $ 25,125 $ (1,133 ) $ 23,992 $ 48,621 $ (2,809 ) $ 45,812 General and administrative $ 8,636 $ (170 ) $ 8,466 $ 16,889 $ (170 ) $ 16,719 Total operating expenses $ 39,770 $ (1,303 ) $ 38,467 $ 77,467 $ (2,979 ) $ 74,488 Loss from operations $ (7,852 ) $ 1,009 $ (6,843 ) $ (16,147 ) $ 2,254 $ (13,893 ) Loss before income taxes $ (10,101 ) $ 1,009 $ (9,092 ) $ (19,176 ) $ 2,254 $ (16,922 ) Provision for (benefit from) income taxes $ 13 $ 21 $ 34 $ (52 ) $ (59 ) $ (111 ) Net loss $ (10,114 ) $ 988 $ (9,126 ) $ (19,124 ) $ 2,313 $ (16,811 ) Basic net loss per share $ (0.20 ) $ 0.02 $ (0.18 ) $ (0.37 ) $ 0.04 $ (0.33 ) Diluted net loss per share $ (0.20 ) $ 0.02 $ (0.18 ) $ (0.37 ) $ 0.04 $ (0.33 ) The following table presents the effect of the adoption of ASC 606 on the Company’s condensed consolidated statement of cash flows (unaudited): Six Months Ended June 30, 2017 As Reported Adjustments As Adjusted (in thousands) Net loss $ (19,124 ) $ 2,313 $ (16,811 ) Adjustments to reconcile net loss to net cash provided by (used in) operating activities: Deferred income taxes $ (118 ) $ (53 ) $ (171 ) Prepaid expenses and other current assets $ (491 ) $ (387 ) $ (878 ) Other assets $ (68 ) $ (2,424 ) $ (2,492 ) Deferred revenue $ 8,535 $ 551 $ 9,086

Balance Sheet Components (Table

Balance Sheet Components (Tables)	6 Months Ended
Balance Sheet Components (Tables)	Jun. 30, 2018
Balance Sheet Related Disclosures [Abstract]
Schedule of Investments in Marketable Securities	Investments in marketable securities presented within current assets on the consolidated balance sheet consisted of the following: June 30, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Marketable securities U.S. treasury securities $ 21,793 $ — $ (50 ) $ 21,743 Corporate bonds 30,304 — (67 ) 30,237 Commercial paper 34,211 — — 34,211 $ 86,308 $ — $ (117 ) $ 86,191 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Marketable securities U.S. treasury securities $ 21,454 $ — $ (19 ) $ 21,435 Corporate bonds 32,437 — (43 ) 32,394 Commercial paper 25,048 — — 25,048 Asset-backed securities 2,600 — (1 ) 2,599 $ 81,539 $ — $ (63 ) $ 81,476
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, 2018 Amortized Cost Fair Value (in thousands) Maturing within 1 year $ 79,394 $ 79,307 Maturing between 1 year and 2 years 6,914 6,884 $ 86,308 $ 86,191
Summary of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets consisted of the following (in thousands): June 30, December 31, 2018 2017 Partner referral fees $ 8,750 $ 7,945 Restricted cash 200 400 Other prepaid expenses and other current assets 7,653 5,611 $ 16,603 $ 13,956
Schedule of Other Assets	Other assets consisted of the following (in thousands): June 30, December 31, 2018 2017 Deferred customer contract acquisition costs $ 28,486 $ 25,338 Restricted cash 260 — Other assets 1,788 1,482 $ 30,534 $ 26,820
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, 2018 2017 Accrued salaries and employee benefits $ 11,249 $ 11,945 Partner referral fees 2,747 2,991 Accrued income and other taxes payable 2,112 1,798 Accrued professional services costs 401 407 Short-term portion of capital lease — 443 Short-term tenant improvement allowance 475 475 Other accrued expenses and current liabilities 2,264 2,815 $ 19,248 $ 20,874

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
Fair Value Measurements (Tables)	Jun. 30, 2018
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, 2018 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 20,279 $ — $ — $ 20,279 Marketable securities U.S. treasury securities 21,743 — — 21,743 Corporate bonds — 30,237 — 30,237 Commercial paper — 34,211 — 34,211 Total assets $ 42,022 $ 64,448 $ — $ 106,470 Liabilities Contingent consideration $ — $ — $ 6,056 $ 6,056 Total liabilities $ — $ — $ 6,056 $ 6,056 December 31, 2017 Level 1 Level 2 Level 3 Total Cash equivalents Money market funds $ 21,247 $ — $ — $ 21,247 Marketable securities U.S. treasury securities 21,435 — — 21,435 Corporate bonds — 32,394 — 32,394 Commercial paper — 25,048 — 25,048 Asset-backed securities — 2,599 — 2,599 Total assets $ 42,682 $ 60,041 $ — $ 102,723 Liabilities Contingent consideration $ — $ — $ 5,866 $ 5,866 Total liabilities $ — $ — $ 5,866 $ 5,866
Common Stock Warrant Liability
Summary of Changes in Common Stock Warrant Liability and Contingent Consideration Liability	The following table summarizes the changes in the common stock warrant liability (in thousands): Quarter Ended June 30, 2017 Six Months Ended June 30, 2017 Beginning fair value $ 12,380 $ 11,380 Change in fair value 2,490 3,490 Exercise of stock warrants (14,870 ) (14,870 ) Ending fair value $ — $ —
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, 2018 2017 2018 2017 Beginning fair value $ 5,978 $ 5,331 $ 5,866 $ 5,238 Change in fair value 78 96 190 189 Ending fair value $ 6,056 $ 5,427 $ 6,056 $ 5,427

Equity Awards (Tables)

Equity Awards (Tables)	6 Months Ended
Equity Awards (Tables)	Jun. 30, 2018
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, 2018 2017 2018 2017 Cost of revenues $ 682 $ 271 $ 1,520 $ 521 Sales and marketing 2,308 748 3,745 1,408 Research and development 675 215 1,104 298 General and administrative 1,728 753 2,998 1,609 $ 5,393 $ 1,987 $ 9,367 $ 3,836
Summary of Restricted Stock Units Activity	The following table summarizes activity for restricted stock units (in thousands): Nonvested at December 31, 2017 2 Granted 1,110 Vested (2 ) Forfeited/canceled (21 ) Nonvested at June 30, 2018 1,089
Summary of Stock Options Activity	The following table summarizes activity for awards that contain service-only vesting conditions : Outstanding at December 31, 2017 5,019 Granted 571 Exercised (937 ) Forfeited/canceled (138 ) Outstanding at June 30, 2018 4,515

Net Loss per Share (Tables)

Net Loss per Share (Tables)	6 Months Ended
Net Loss per Share (Tables)	Jun. 30, 2018
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, 2018 2017 2018 2017 Numerator: Net loss $ (8,457 ) $ (9,126 ) $ (15,612 ) $ (16,811 ) Denominator: Weighted average shares 53,555 51,842 53,354 51,563 Add: Dilutive effect of securities — — — — Shares used to calculate diluted net loss per share 53,555 51,842 53,354 51,563 Basic net loss per share $ (0.16 ) $ (0.18 ) $ (0.29 ) $ (0.33 ) Diluted net loss per share $ (0.16 ) $ (0.18 ) $ (0.29 ) $ (0.33 )
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, 2018 2017 Stock options with service-only vesting conditions 4,515 5,126 Stock options with performance conditions 683 683 Restricted stock units 1,089 — Total shares excluded from net loss per share 6,287 5,809

Basis of Presentation, Signif24

Basis of Presentation, Significant Accounting Policies and Recently-Issued Accounting Pronouncements - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Subscription fees payable, description			Customers pay subscription and support fees for access to the Company’s SaaS platform generally for a one-year period. In more limited cases, customers may pay for up to three years in advance. Fees are based on a number of factors, including the solutions subscribed for by the customer and the number of users having access to the solutions.
SaaS platform subscription fee, period			1 year
SaaS platform subscription fee, maximum advance period			3 years
Deferred revenue recognized			$ 74,700,000	$ 57,700,000
Contracted not recognized revenue	$ 255,300,000		$ 255,300,000
Contracted not recognized revenue, expects to recognize revenue over next 12 months			63.00%
Contract capitalized cost, amortized method			straight line
Impairement losses in relation to costs capitalized			$ 0
New Accounting Pronouncement Revenue from Contracts
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated benfit period of contract costs			5 years
Sales and Marketing Expenses
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Amortization expense	$ 5,700,000	$ 3,700,000	$ 11,000,000	$ 7,000,000

Revenues - Effect of Adoption o

Revenues - Effect of Adoption of ASC 606 on Impacts to Previously Reported Results - Condensed Consolidated Balance Sheet (Unaudited) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable, net	$ 61,057	$ 61,918	[1]
Prepaid expenses and other current assets	16,603	13,956	[1]
Total current assets	192,533	188,454	[1]
Other assets	30,534	26,820	[1]
Total assets	464,440	460,813	[1]
Deferred revenue	117,420	104,184	[1]
Total current liabilities	141,172	134,320	[1]
Deferred tax liabilities, net	1,436	1,743	[1]
Deferred revenue, noncurrent	382	468	[1]
Total liabilities	150,352	143,508	[1]
Accumulated deficit	(118,402)	(102,790)	[1]
Total stockholders' equity	314,088	317,305	[1]
Total liabilities and stockholders' equity	$ 464,440	460,813	[1]
Adoption of ASC 606 \| As Reported
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable, net		61,589
Prepaid expenses and other current assets		19,785
Total current assets		193,954
Other assets		1,391
Total assets		440,884
Deferred revenue		106,903
Total current liabilities		137,039
Deferred tax liabilities, net		1,328
Deferred revenue, noncurrent		912
Total liabilities		146,256
Accumulated deficit		(125,467)
Total stockholders' equity		294,628
Total liabilities and stockholders' equity		440,884
Adoption of ASC 606 \| Adjustments
Condensed Balance Sheet Statements Captions [Line Items]
Accounts receivable, net		329
Prepaid expenses and other current assets		(5,829)
Total current assets		(5,500)
Other assets		25,429
Total assets		19,929
Deferred revenue		(2,719)
Total current liabilities		(2,719)
Deferred tax liabilities, net		415
Deferred revenue, noncurrent		(444)
Total liabilities		(2,748)
Accumulated deficit		22,677
Total stockholders' equity		22,677
Total liabilities and stockholders' equity		$ 19,929

[1]	See Note 3 for a summary of adjustments.

Revenues - Effect of Adoption26

Revenues - Effect of Adoption of ASC 606 on Impacts to Previously Reported Results - Condensed Consolidated Statement of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2018	Jun. 30, 2017
Revenues
Total Revenues		$ 41,981			$ 80,162
Cost of revenues
Total cost of revenues	$ 11,866	10,357	[1]	$ 23,472	19,567	[1]
Gross profit	43,588	31,624	[1]	83,266	60,595	[1]
Operating expenses
Sales and marketing	32,150	23,992	[1]	61,377	45,812	[1]
General and administrative	12,458	8,466	[1]	23,540	16,719	[1]
Total operating expenses	52,419	38,467	[1]	99,657	74,488	[1]
Loss from operations	(8,831)	(6,843)	[1]	(16,391)	(13,893)	[1]
Loss before income taxes	(8,324)	(9,092)	[1]	(15,499)	(16,922)	[1]
Provision for (benefit from) income taxes	133	34	[1]	113	(111)	[1]
Net loss	$ (8,457)	$ (9,126)	[1]	$ (15,612)	$ (16,811)	[1]
Basic net loss per share	$ (0.16)	$ (0.18)	[1]	$ (0.29)	$ (0.33)	[1]
Diluted net loss per share	$ (0.16)	$ (0.18)	[1]	$ (0.29)	$ (0.33)	[1]
Subscription and Support
Revenues
Total Revenues		$ 39,832			$ 76,390
Cost of revenues
Total cost of revenues	$ 9,493	8,227	[1]	$ 18,874	15,982	[1]
Professional Services
Revenues
Total Revenues		2,149			3,772
Adoption of ASC 606 \| As Reported
Revenues
Total Revenues		42,293			80,927
Cost of revenues
Total cost of revenues		10,375			19,607
Gross profit		31,918			61,320
Operating expenses
Sales and marketing		25,125			48,621
General and administrative		8,636			16,889
Total operating expenses		39,770			77,467
Loss from operations		(7,852)			(16,147)
Loss before income taxes		(10,101)			(19,176)
Provision for (benefit from) income taxes		13			(52)
Net loss		$ (10,114)			$ (19,124)
Basic net loss per share		$ (0.20)			$ (0.37)
Diluted net loss per share		$ (0.20)			$ (0.37)
Adoption of ASC 606 \| Adjustments
Revenues
Total Revenues		$ (312)			$ (765)
Cost of revenues
Total cost of revenues		(18)			(40)
Gross profit		(294)			(725)
Operating expenses
Sales and marketing		(1,133)			(2,809)
General and administrative		(170)			(170)
Total operating expenses		(1,303)			(2,979)
Loss from operations		1,009			2,254
Loss before income taxes		1,009			2,254
Provision for (benefit from) income taxes		21			(59)
Net loss		$ 988			$ 2,313
Basic net loss per share		$ 0.02			$ 0.04
Diluted net loss per share		$ 0.02			$ 0.04
Adoption of ASC 606 \| Subscription and Support \| As Reported
Revenues
Total Revenues		$ 40,244			$ 77,295
Cost of revenues
Total cost of revenues		8,245			16,022
Adoption of ASC 606 \| Subscription and Support \| Adjustments
Revenues
Total Revenues		(412)			(905)
Cost of revenues
Total cost of revenues		(18)			(40)
Adoption of ASC 606 \| Professional Services \| As Reported
Revenues
Total Revenues		2,049			3,632
Adoption of ASC 606 \| Professional Services \| Adjustments
Revenues
Total Revenues		$ 100			$ 140

[1]	See Note 3 for a summary of adjustments.

Revenues - Effect of Adoption27

Revenues - Effect of Adoption of ASC 606 on Impacts to Previously Reported Results - Condensed Consolidated Statement of Cash Flows (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2018	Jun. 30, 2017
Condensed Cash Flow Statements Captions [Line Items]
Net loss	$ (8,457)	$ (9,126)	[1]	$ (15,612)	$ (16,811)	[1]
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Deferred income taxes				(307)	(171)	[1]
Prepaid expenses and other current assets				(2,624)	(878)	[1]
Other assets				(3,454)	(2,492)	[1]
Deferred revenue				$ 13,150	9,086	[1]
Adoption of ASC 606 \| As Reported
Condensed Cash Flow Statements Captions [Line Items]
Net loss		(10,114)			(19,124)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Deferred income taxes					(118)
Prepaid expenses and other current assets					(491)
Other assets					(68)
Deferred revenue					8,535
Adoption of ASC 606 \| Adjustments
Condensed Cash Flow Statements Captions [Line Items]
Net loss		$ 988			2,313
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Deferred income taxes					(53)
Prepaid expenses and other current assets					(387)
Other assets					(2,424)
Deferred revenue					$ 551

[1]	See Note 3 for a summary of adjustments.

Revenues - Additional Informati

Revenues - Additional Information (Details) - USD ($)	3 Months Ended			6 Months Ended
Revenues - Additional Information (Details) - USD ($)	Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2018	Jun. 30, 2017
Disaggregation Of Revenue [Line Items]
Total revenues	$ 55,454,000	$ 41,981,000	[1]	$ 106,738,000	$ 80,162,000	[1]
Enterprise Market \| Maximum
Disaggregation Of Revenue [Line Items]
Total revenues				500,000,000
Mid-market
Disaggregation Of Revenue [Line Items]
Total revenues	$ 8,942,000	$ 6,782,000		17,715,000	$ 12,925,000
Mid-market \| Maximum
Disaggregation Of Revenue [Line Items]
Total revenues				500,000,000
Mid-market \| Minimum
Disaggregation Of Revenue [Line Items]
Total revenues				$ 50,000,000

[1]	See Note 3 for a summary of adjustments.

Revenues - Schedule of Disaggre

Revenues - Schedule of Disaggregation of Revenues by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2018	Jun. 30, 2017
Disaggregation Of Revenue [Line Items]
Total revenues	$ 55,454	$ 41,981	[1]	$ 106,738	$ 80,162	[1]
United States
Disaggregation Of Revenue [Line Items]
Total revenues	43,662	34,063		84,674	65,278
International
Disaggregation Of Revenue [Line Items]
Total revenues	$ 11,792	$ 7,918		$ 22,064	$ 14,884

[1]	See Note 3 for a summary of adjustments.

Revenues - Schedule of Disagg30

Revenues - Schedule of Disaggregation of Revenues by Market (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2018	Jun. 30, 2017
Disaggregation Of Revenue [Line Items]
Total revenues	$ 55,454	$ 41,981	[1]	$ 106,738	$ 80,162	[1]
Enterprise
Disaggregation Of Revenue [Line Items]
Total revenues	46,512	35,199		89,023	67,237
Mid-market
Disaggregation Of Revenue [Line Items]
Total revenues	$ 8,942	$ 6,782		$ 17,715	$ 12,925

[1]	See Note 3 for a summary of adjustments.

Balance Sheet Components - Sche

Balance Sheet Components - Schedule of Investments in Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 86,308	$ 81,539
Gross Unrealized Losses	(117)	(63)
Fair Value	86,191	81,476	[1]
U.S. treasury securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	21,793	21,454
Gross Unrealized Losses	(50)	(19)
Fair Value	21,743	21,435
Corporate bonds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	30,304	32,437
Gross Unrealized Losses	(67)	(43)
Fair Value	30,237	32,394
Commercial paper
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	34,211	25,048
Fair Value	$ 34,211	25,048
Asset-backed securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		2,600
Gross Unrealized Losses		(1)
Fair Value		$ 2,599

[1]	See Note 3 for a summary of adjustments.

Balance Sheet Components - Addi

Balance Sheet Components - Additional Information (Details)	3 Months Ended		6 Months Ended
Balance Sheet Components - Additional Information (Details)	Jun. 30, 2018USD ($)Security	Jun. 30, 2017USD ($)Security	Jun. 30, 2018USD ($)Security	Jun. 30, 2017USD ($)Security
Schedule Of Available For Sale Securities [Line Items]
Sales of marketable securities \| Security	0	0	0	0
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		$ 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, 2018	Dec. 31, 2017
Balance Sheet Related Disclosures [Abstract]
Maturing within 1 year	$ 79,394
Maturing between 1 year and 2 years	6,914
Amortized Cost	86,308	$ 81,539
Maturing within 1 year	79,307
Maturing between 1 year and 2 years	6,884
Total , Fair Value	$ 86,191

Balance Sheet Components - Su34

Balance Sheet Components - Summary of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Balance Sheet Related Disclosures [Abstract]
Partner referral fees	$ 8,750	$ 7,945
Restricted cash	200	400
Other prepaid expenses and other current assets	7,653	5,611
Prepaid expenses and other current assets, Total	$ 16,603	$ 13,956	[1]

[1]	See Note 3 for a summary of adjustments.

Balance Sheet Components - Su35

Balance Sheet Components - Summary of Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017		Jun. 30, 2017	[1]
Balance Sheet Related Disclosures [Abstract]
Deferred customer contract acquisition costs	$ 28,486	$ 25,338
Restricted cash	260			$ 400
Other assets	1,788	1,482
Other Assets Noncurrent	$ 30,534	$ 26,820	[1]

[1]	See Note 3 for a summary of adjustments.

Balance Sheet Components - Sc36

Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Payables And Accruals [Abstract]
Accrued salaries and employee benefits	$ 11,249	$ 11,945
Partner referral fees	2,747	2,991
Accrued income and other taxes payable	2,112	1,798
Accrued professional services costs	401	407
Short-term portion of capital lease		443
Short-term tenant improvement allowance	475	475
Other accrued expenses and current liabilities	2,264	2,815
Accrued expenses and other current liabilities	$ 19,248	$ 20,874	[1]

[1]	See Note 3 for a summary of adjustments.

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, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	$ 106,470	$ 102,723
Liabilities
Contingent consideration	6,056	5,866
Total liabilities	6,056	5,866
Money market funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	20,279	21,247
U.S. treasury securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	21,743	21,435
Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	30,237	32,394
Commercial paper
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	34,211	25,048
Asset-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities		2,599
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	42,022	42,682
Level 1 \| Money market funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	20,279	21,247
Level 1 \| U.S. treasury securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	21,743	21,435
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	64,448	60,041
Level 2 \| Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	30,237	32,394
Level 2 \| Commercial paper
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities	34,211	25,048
Level 2 \| Asset-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities		2,599
Level 3
Liabilities
Contingent consideration	6,056	5,866
Total liabilities	$ 6,056	$ 5,866

Fair Value Measurements - Sum38

Fair Value Measurements - Summary of Changes in Common Stock Warrant Liability (Details) - Common Stock Warrant Liability - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Beginning fair value	$ 12,380	$ 11,380
Change in fair value	2,490	3,490
Exercise of stock warrants	$ (14,870)	$ (14,870)

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - Common Stock	1 Months Ended
	May 31, 2017shares
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Warrants to purchase of common stock	499,999
Issuance of common stock	428,033

Fair Value Measurements - Sum40

Fair Value Measurements - Summary of Changes in Contingent Consideration Liability (Details) - Contingent Consideration - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Beginning fair value	$ 5,978	$ 5,331	$ 5,866	$ 5,238
Change in fair value	78	96	190	189
Ending fair value	$ 6,056	$ 5,427	$ 6,056	$ 5,427

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	Sep. 03, 2013	Jun. 30, 2018	Dec. 31, 2017
Business Acquisition Contingent Consideration [Line Items]
Lease expiration year		2,024
BlackLine Systems, Inc.
Business Acquisition Contingent Consideration [Line Items]
Maximum contingent cash consideration to be distributed	$ 8
BlackLine Systems, Inc. \| Contingent Consideration
Business Acquisition Contingent Consideration [Line Items]
Fair value of contingent consideration		$ 6.1	$ 5.9

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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 5,393	$ 1,987	$ 9,367	$ 3,836
Cost of Revenues
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	682	271	1,520	521
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	2,308	748	3,745	1,408
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	675	215	1,104	298
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,728	$ 753	$ 2,998	$ 1,609

Equity Awards - Additional Info

Equity Awards - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
Equity Awards - Additional Information (Details) - USD ($)	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based compensation capitalized as an asset	$ 100,000	$ 30,000	$ 200,000	$ 100,000

Equity Awards - Summary of Rest

Equity Awards - Summary of Restricted Stock Units Activity (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2018shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Restricted stock units, Nonvested, Beginning balance	2
Restricted stock units, Granted	1,110
Restricted stock units, Vested	(2)
Restricted stock units, Forfeited/canceled	(21)
Restricted stock units, Nonvested, Ending balance	1,089

Equity Awards - Summary of St45

Equity Awards - Summary of Stock Options Activity (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2018shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning balance	5,019
Granted	571
Exercised	(937)
Forfeited/canceled	(138)
Outstanding, Ending balance	4,515

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	[1]	Jun. 30, 2018	Jun. 30, 2017	[1]
Income Tax Disclosure [Abstract]
U.S. Federal statutory rate				21.00%
Income tax expense (benefit)	$ 133	$ 34		$ 113	$ (111)

[1]	See Note 3 for a summary of adjustments.

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, 2018	Jun. 30, 2017	[1]	Jun. 30, 2018	Jun. 30, 2017	[1]
Numerator:
Net loss	$ (8,457)	$ (9,126)		$ (15,612)	$ (16,811)
Denominator:
Weighted average shares	53,555	51,842		53,354	51,563
Shares used to calculate diluted net loss per share	53,555	51,842		53,354	51,563
Basic net loss per share	$ (0.16)	$ (0.18)		$ (0.29)	$ (0.33)
Diluted net loss per share	$ (0.16)	$ (0.18)		$ (0.29)	$ (0.33)

[1]	See Note 3 for a summary of adjustments.

Net Loss per Share - Schedule48

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, 2018	Jun. 30, 2017
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from net loss per share	6,287	5,809
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	4,515	5,126
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	1,089

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - shares	Aug. 20, 2018	Aug. 08, 2018	Jun. 30, 2018
Subsequent Event [Line Items]
Stock option grants to employees			571,000
Restricted stock unit grants to employees			1,110,000
Stock Options
Subsequent Event [Line Items]
Vesting term			The stock options will vest as to one-fourth of the total number of options awarded on the first anniversary of August 20, 2018 and quarterly thereafter for 12 consecutive quarters.
Restricted Stock Units
Subsequent Event [Line Items]
Vesting term			The restricted stock units will vest as to one-fourth of the total number of units awarded on the first anniversary of August 20, 2018 and quarterly thereafter for 12 consecutive quarters.
Subsequent Event \| Stock Options
Subsequent Event [Line Items]
Stock option grants to employees		200,000
Number of common stock received by employees upon exercise of vested award and payment of exercise price		1
Vesting percentage	0.25%
Subsequent Event \| Restricted Stock Units
Subsequent Event [Line Items]
Vesting percentage	0.25%
Restricted stock unit grants to employees		200,000
Number of common stock received by employees upon exercise of vested award		1