Carbon Black (CBLK) 10-Q 25 Oct 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - $ / shares	9 Months Ended
	Sep. 30, 2018	Oct. 22, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	Carbon Black, Inc.
Entity Central Index Key	1,366,527
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		67,917,331
Entity Listing, Par Value Per Share	$ 0.001
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3

UNAUDITED CONDENSED CONSOLIDATE

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 69,099	$ 36,073
Short-term investments	94,666
Accounts receivable, net of allowances of $209 and $124 as of September 30, 2018 and December 31, 2017, respectively	51,582	60,850
Prepaid expenses and other current assets	8,967	6,040
Deferred commissions	11,801	9,551
Total current assets	236,115	112,514
Deferred commissions, net of current portion	23,171	20,404
Property and equipment, net	14,792	12,459
Intangible assets, net	2,919	4,092
Goodwill	119,656	119,656
Other-long term assets	531	2,436
Total assets	397,184	271,561
Current liabilities:
Accounts payable	3,502	2,481
Accrued expenses	19,596	18,846
Deferred revenue	138,515	130,165
Deferred rent	1,176	944
Total current liabilities	162,789	152,436
Deferred revenue, net of current portion	38,316	38,535
Warrant liability		2,766
Deferred rent, net of current portion	2,774	3,114
Deferred tax liability	37	33
Other long-term liabilities	42	42
Total liabilities	203,958	196,926
Commitments and contingencies (Note 11)
Stockholders’ equity (deficit):
Common stock, $0.001 par value, 500,000,000 shares and 156,650,000 shares authorized as of September 30, 2018 and December 31, 2017, respectively; 67,951,050 shares and 11,193,366 shares issued and 67,895,646 and 11,139,690 shares outstanding as of September 30, 2018 and December 31, 2017, respectively	68	11
Treasury stock, at cost, 55,404 and 53,676 shares as of September 30, 2018 and December 31, 2017, respectively	(6)	(6)
Additional-paid in capital	712,156	13,429
Accumulated other comprehensive loss	(30)
Accumulated deficit	(518,962)	(273,513)
Total stockholders’ equity (deficit)	193,226	(260,079)
Total liabilities, redeemable convertible and convertible preferred stock and stockholders' equity (deficit)	397,184	271,561
Redeemable convertible preferred stock
Current liabilities:
Convertible preferred stock		333,204
Stockholders’ equity (deficit):
Total stockholders’ equity (deficit)	0	333,204
Series A convertible preferred stock
Current liabilities:
Convertible preferred stock		1,510
Stockholders’ equity (deficit):
Total stockholders’ equity (deficit)	$ 0	$ 1,510

UNAUDITED CONDENSED CONSOLIDA_2

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Accounts receivable, net
Allowances for accounts receivables	$ 209	$ 124
Convertible preferred stock
Convertible preferred stock, par value (in dollars per share)	$ 0.001
Convertible preferred stock, shares authorized (in shares)	25,000,000
Convertible preferred stock, shares issued (in shares)	0
Convertible preferred stock, shares outstanding (in shares)	0
Common stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares (in shares)	500,000,000	156,650,000
Common stock, shares issued (in shares)	67,951,050	11,193,366
Common stock, shares outstanding (in shares)	67,895,646	11,139,690
Treasury stock
Treasury stock, shares (in shares)	55,404	53,676
Redeemable convertible preferred stock
Convertible preferred stock
Convertible preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Convertible preferred stock, shares authorized (in shares)	0	94,101,207
Convertible preferred stock, shares issued (in shares)	0	88,741,194
Convertible preferred stock, shares outstanding (in shares)	0	88,741,194
Convertible preferred stock, liquidation preference, value		$ 272,506
Series A convertible preferred stock
Convertible preferred stock
Convertible preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Convertible preferred stock, shares authorized (in shares)	0	8,800,000
Convertible preferred stock, shares issued (in shares)	0	3,851,806
Convertible preferred stock, shares outstanding (in shares)	0	3,851,806

UNAUDITED CONDENSED CONSOLIDA_3

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Revenue	$ 53,415	$ 41,509	$ 152,841	$ 116,145
Cost of revenue:
Cost of revenue	11,905	9,785	33,224	25,777
Gross profit	41,510	31,724	119,617	90,368
Operating expenses:
Sales and marketing	35,818	25,988	101,657	75,078
Research and development	16,189	13,675	47,195	37,794
General and administrative	7,563	5,717	25,838	16,060
Total operating expenses	59,570	45,380	174,690	128,932
Loss from operations	(18,060)	(13,656)	(55,073)	(38,564)
Interest income, net	737	22	1,192	5
Change in fair value of warrant liability		(45)	(8,838)	79
Other income (expense), net	(173)	102	(547)	215
Loss before income taxes	(17,496)	(13,577)	(63,266)	(38,265)
Provision for income taxes	136	22	241	108
Net loss	(17,632)	(13,599)	(63,507)	(38,373)
Accretion of preferred stock to redemption value		(7,427)	(199,492)	(15,751)
Net loss attributable to common stockholders	$ (17,632)	$ (21,026)	$ (262,999)	$ (54,124)
Net loss per share attributable to common stockholders - basic and diluted	$ (0.26)	$ (1.99)	$ (6.34)	$ (5.27)
Weighted-average common shares outstanding - basic and diluted	67,837,240	10,587,153	41,494,203	10,263,962
Subscription, License and Support
Revenue:
Revenue	$ 50,824	$ 38,381	$ 144,106	$ 107,135
Cost of revenue:
Cost of revenue	9,015	6,842	24,278	17,417
Services
Revenue:
Revenue	2,591	3,128	8,735	9,010
Cost of revenue:
Cost of revenue	$ 2,890	$ 2,943	$ 8,946	$ 8,360

UNAUDITED CONDENSED CONSOLIDA_4

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Condensed Consolidated Statements of Comprehensive Loss
Net loss	$ (17,632)	$ (63,507)
Other comprehensive loss:
Unrealized loss on available-for-sale securities	(30)	(30)
Total change in unrealized losses on investments	(30)	(30)
Comprehensive loss	$ (17,662)	$ (63,537)

UNAUDITED CONDENSED CONSOLIDA_5

UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF REDEEMABLE CONVERTIBLE AND CONVERTIBLE PREFERRED STOCK $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)shares
Increase (Decrease) in Redeemable Convertible and Convertible Preferred Stock
Exercise of stock options | $	$ 3,137
Ending balance (in shares)	0
Redeemable convertible preferred stock
Increase (Decrease) in Redeemable Convertible and Convertible Preferred Stock
Beginning balance | $	$ 333,204
Beginning balance (in shares)	88,741,194
Accretion of redeemable convertible preferred stock to redemption value | $	$ 199,492
Conversion of convertible preferred stock upon initial public offering | $	$ (532,696)
Conversion of convertible preferred stock upon initial public offering (in shares)	(88,741,194)
Ending balance (in shares)	0
Series A convertible preferred stock
Increase (Decrease) in Redeemable Convertible and Convertible Preferred Stock
Beginning balance | $	$ 1,510
Beginning balance (in shares)	3,851,806
Exercise of stock options | $	$ 211
Exercise of stock options (in shares)	360,385
Conversion of convertible preferred stock upon initial public offering | $	$ (1,721)
Conversion of convertible preferred stock upon initial public offering (in shares)	(4,212,191)
Ending balance (in shares)	0

UNAUDITED CONDENSED CONSOLIDA_6

UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY - 9 months ended Sep. 30, 2018 - USD ($) $ in Thousands	Redeemable convertible preferred stockCommon Stock	Redeemable convertible preferred stockAdditional Paid-in Capital	Redeemable convertible preferred stock	Series A convertible preferred stockCommon Stock	Series A convertible preferred stockAdditional Paid-in Capital	Series A convertible preferred stock	Common Stock	Treasury Stock	Additional Paid-in Capital	Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Beginning balance at Dec. 31, 2017			$ 333,204			$ 1,510	$ 11	$ (6)	$ 13,429		$ (273,513)	$ (260,079)
Beginning balance (in shares) at Dec. 31, 2017							11,139,690	53,676				11,139,690
Increase (Decrease) in Stockholders' Equity (Deficit)
Accretion of preferred stock to redemption value									(17,550)		(181,942)	$ (199,492)
Conversion of convertible preferred stock upon initial public offering	$ 44	$ 532,652	532,696	$ 2	$ 1,719
Conversion of convertible preferred stock upon initial public offering (in shares)	44,370,560			1,709,063		1,721,000
Issuance of common stock upon initial public offering, net of underwriting discounts and commissions and offering costs incurred of $4858							$ 9		157,697			157,706
Issuance of common stock upon initial public offering, net of underwriting discounts and commissions and offering costs incurred (in shares)							9,200,000
Issuance of common stock upon exercise of common stock warrants							$ 1		11,603			11,604
Issuance of common stock upon exercise of common stock warrants (in shares)							712,063
Repurchase of common stock (in shares)							(1,728)	1,728
Exercise of stock options						$ 211	$ 1		3,136			3,137
Exercise of stock options (in shares)						360,385	765,998
Stock-based compensation expense									9,470			9,470
Unrealized loss on available-for-sale securities										$ (30)		(30)
Net loss											(63,507)	(63,507)
Ending balance at Sep. 30, 2018			$ 0			$ 0	$ 68	$ (6)	$ 712,156	$ (30)	$ (518,962)	$ 193,226
Ending balance (in shares) at Sep. 30, 2018							67,895,646	55,404				67,895,646

UNAUDITED CONDENSED CONSOLIDA_7

UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY (Parenthetical) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Underwriting discounts and commissions and offering costs incurred
Underwriting discounts and commissions and offering costs incurred	$ 4,858

UNAUDITED CONDENSED CONSOLIDA_8

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net loss	$ (63,507)	$ (38,373)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	5,881	5,204
Stock-based compensation expense	9,470	6,649
Provisions for doubtful accounts	140	(159)
Non-cash interest expense	34	15
Change in fair value of warrant liability	8,838	(79)
Deferred income taxes	4
Other non-cash income	(115)
Changes in operating assets and liabilities:
Accounts receivable	9,127	(2,517)
Prepaid expenses and other assets	(2,657)	(1,916)
Deferred commissions	(5,017)	(4,122)
Accounts payable	1,236	1,136
Accrued expenses	751	(1,686)
Deferred revenue	8,131	23,711
Deferred rent	(109)	(200)
Other long-term liabilities	(263)	(59)
Net cash used in operating activities	(28,056)	(12,396)
Cash flows from investing activities:
Purchases of short-term investments	(94,581)
Purchases of property and equipment	(5,354)	(4,228)
Capitalization of internal-use software costs	(1,901)	(714)
Net cash used in investing activities	(101,836)	(4,942)
Cash flows from financing activities:
Proceeds from exercise of stock options	3,348	2,349
Repayments of line of credit		(5,500)
Proceeds from initial public offering, net of offering costs	159,617
Payments of deferred financing costs	(47)	(84)
Net cash provided by (used in) financing activities	162,918	(3,235)
Net increase (decrease) in cash and cash equivalents	33,026	(20,573)
Cash and cash equivalents at beginning of period	36,073	51,503
Cash and cash equivalents at end of period	69,099	30,930
Supplemental disclosure of non‑cash investing and financing activities:
Conversion of redeemable convertible preferred stock upon initial public offering	532,696
Conversion of convertible preferred stock upon initial public offering	1,720
Issuance of common stock upon exercise of common stock warrants	11,604
Deferred IPO costs paid in prior periods	1,911
Accretion of preferred stock to redemption value	199,492	15,751
Additions to property and equipment included in accounts payable at period end	$ 75	139
Series B preferred stock issued upon exercise of Series B Warrant		225
Series F preferred stock and common stock issued upon termination of customer warrant in connection with acquisition of Confer Technologies, Inc.		$ 1,347

UNAUDITED CONDENSED CONSOLIDA_9

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Payment of initial public offering costs
Payment of initial public offering costs	$ 2,947

Overview and Basis of Presentat

Overview and Basis of Presentation	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Overview and Basis of Presentation	1. OVERVIEW AND BASIS OF PRESENTATION Overview Carbon Black, Inc. (the “Company”) is a leading provider of next-generation endpoint security solutions. The Company’s solutions enable customers to predict, prevent, detect, respond to and remediate cyber attacks before they cause a damaging incident or data breach. The Company was incorporated under the laws of the State of Delaware in December 2002 as Bit 9, Inc. and in April 2005 changed its name to Bit9, Inc. In January 2016, the Company amended its certificate of incorporation to change its name to Carbon Black, Inc. On April 20, 2018, the Company effected a 1-for-2 reverse stock split of its issued and outstanding shares of common stock and a proportional adjustment to the existing conversion ratios of Company’s Series B, Series C, Series D, Series E, Series E-1 and Series F preferred stock. Accordingly, all share and per share amounts for all periods presented in the accompanying unaudited consolidated financial statements and notes thereto have been adjusted retroactively, where applicable, to reflect this reverse stock split and adjustment of the preferred stock conversion ratios. On May 8, 2018, the Company closed its initial public offering (“IPO”), in which it issued and sold 9,200,000 shares of common stock inclusive of the underwriters’ option to purchase additional shares that was exercised in full. The price to the public was $19 per share. The Company received aggregate proceeds of $162.6 million from the IPO, net of underwriters’ discounts and commissions, and before deducting offering costs of approximately $4.9 million. Upon closing of the IPO, all shares of the Company’s outstanding redeemable convertible and convertible preferred stock automatically converted into 46,079,623 shares of common stock. Additionally, an outstanding warrant which became exercisable upon the closing of the IPO was exercised to purchase 485,985 shares of common stock. Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting standards (“GAAP”) for interim financial information and include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The Company’s condensed consolidated financial statements are unaudited, but include all adjustments of a normal recurring nature necessary for a fair presentation of the quarterly results. The Company has made estimates and judgments affecting the amounts reported in the condensed consolidated financial statements and the accompanying notes. The actual results that the Company experiences may differ materially from the Company’s estimates. The Company’s condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company’s final prospectus for its IPO dated as of May 4, 2018 and filed with the SEC pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended. Effective January 1, 2018, the Company adopted the requirements of Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASC 606”) on a full retrospective basis as discussed in detail in Note 2. All amounts and disclosures set forth in this Quarterly Report on Form 10-Q have been updated to comply with ASC 606. The Jumpstart Our Business Startups Act of 2012, or the JOBS Act, permits an “emerging growth company” such as the Company to take advantage of an extended transition period to comply with new or revised accounting standards applicable to public companies until those standards would otherwise apply to private companies. The Company has irrevocably elected to “opt out” of this provision and, as a result, the Company will comply with new or revised accounting standards when they are required to be adopted by public companies that are not emerging growth companies.

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
New Accounting Pronouncements	2. NEW ACCOUNTING PRONOUNCEMENTS Recently issued accounting pronouncements: Internal-Use Software In August 2018, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40) (“ASU 2018-15”). ASU 2018-15 was issued in order to address a customer's accounting for implementation costs incurred in a cloud computing arrangement (“CCA”) that is considered a service contract. Under this guidance, implementation costs for a CCA should be evaluated for capitalization using the same approach as implementation costs associated with internal-use software. The capitalized implementation costs should be expensed over the term of the hosting arrangement, which includes any reasonably certain renewal periods. The pronouncement is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. The Company is currently evaluating the impact of this pronouncement on its consolidated financial statements. Stock Compensation In June 2018, the FASB issued ASU No. 2018-07, Compensation – Stock Compensation (Topic 718) (“ASU 2018-07”). ASU 2018-07 was issued in order to expand the guidance for stock-based compensation, to include share-based payment transactions for acquiring goods and services from nonemployees. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. The Company does not expect the adoption of the new accounting standard to have a material impact on its consolidated financial statements. Comprehensive Income In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (“ASU 2018-02”), which provides for the reclassification of the effect of remeasuring deferred tax balances related to items within accumulated other comprehensive income to retained earnings resulting from the Tax Cuts and Jobs Act, or Tax Act. The guidance is effective for annual reporting periods beginning after December 15, 2018, including interim periods within that reporting period. Early adoption is permitted. The Company does not expect the adoption of the new accounting standard to have a material impact on its consolidated financial statements. Leases In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”). ASU 2016-02 was issued to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The new standard will be effective for the Company on January 1, 2019. Companies are required to use a modified retrospective approach, with the option of applying the requirements of the standard either (1) retrospectively to each prior comparative reporting period presented, or (2) retrospectively at the beginning of the period of adoption. The Company plans to adopt this standard in the first quarter of 2019 by applying the requirements to the beginning of the period of adoption through a cumulative-effect adjustment. The Company is in the process of identifying the population of potential lease arrangements and evaluating these arrangements in the context of the new guidance. While the Company continues to evaluate the effect of adoption on its consolidated financial statements, the Company expects the adoption will result in the recognition of right-of-use assets and lease liabilities that were not previously recognized, which will increase total assets and liabilities on the Company’s consolidated balance sheet. Recently adopted accounting pronouncement: Revenue In May 2014, the FASB issued ASC 606, which supersedes existing revenue recognition guidance under GAAP. The Company adopted ASC 606 effective January 1, 2018 using the full retrospective method, which required the Company to restate each prior reporting period presented for the impact of adoption of the standard. The Company’s recognition of total revenue related to subscription (i.e., term-based) licenses, cloud-based subscriptions, access to the threat intelligence capabilities of the Cb Predictive Security Cloud, maintenance services and customer support, and stand-alone professional services remain substantially unchanged under the new standard. However, as further discussed herein, the timing of recognition related to certain aspects of subscription (i.e. term-based) licenses, perpetual licenses and associated professional services is different under the new standard. For subscription license sales of Cb Protection and Cb Response, under the new standard, the Company considers the software license and the access to the threat intelligence capabilities of the Cb Predictive Security Cloud, which provides continuous updates of real-time threat intelligence, to be a single performance obligation. As a result, the arrangement consideration allocated to the software license is deferred on the Company’s balance sheet and recognized ratably over the term of the subscription as the performance obligation is satisfied. However, under the new standard, the Company is no longer required to delay the commencement of revenue recognition of subscription licenses until the commencement of any professional services and training sold with the subscription license due to the lack of vendor - specific objective evidence ("VSOE") of its longest delivered service elements, maintenance and support. While under the new standard, maintenance services and customer support related to subscription licenses are a stand-alone performance obligation, the related revenue continues to be recognized ratably over the term of the maintenance and support arrangement as the performance obligation is satisfied. For its infrequent sales of perpetual licenses of Cb Protection and Cb Response, prior to the adoption of ASC 606, the Company recognized revenue ratably over the longest service period of any deliverable in the arrangement, which was generally the maintenance and support term, due to the lack of VSOE of fair value for its maintenance and support offerings. Under the new standard, the Company is no longer required to delay revenue recognition of perpetual licenses until the commencement of any bundled professional services and training sold with the perpetual license. Further, the Company recognizes the revenue related to the sale of perpetual software licenses ratably over the customer’s estimated economic life, which the Company has estimated to be five years, rather than over the initially committed period of maintenance and support. In addition, under the new standard, for subscription and perpetual licenses that are sold with professional services in a combined arrangement, the professional services represent a separate performance obligation and the Company recognizes revenue associated with the professional services as such services are performed. Revenue associated with professional services sold in a combined arrangement with subscription and perpetual licenses was previously recognized ratably over the longest service period of any deliverable in the arrangement, which was generally the maintenance and support term, due to the lack of VSOE of fair value for the Company’s maintenance and support offerings. Another significant provision of the new standard requires the capitalization and amortization of costs associated with obtaining a contract, such as sales commissions. Under the new standard, all incremental costs to acquire a contract are capitalized and amortized using a systematic basis over the pattern of transfer of the goods and services to which the asset relates. Under the previous standard, the Company capitalized commission costs that were incremental and directly related to the acquisition of a customer arrangement. The commission costs were capitalized when earned and were amortized as expense over the period that the revenue was recognized for the related non-cancelable customer arrangement in proportion to the recognition of revenue, without regard to anticipated customer renewals. Under the new standard, the Company continues to capitalize all incremental commission costs to obtain a customer arrangement, but now amortizes the capitalized costs on a straight-line basis over the estimated customer relationship period, which includes anticipated customer renewals, because the Company anticipates that a majority of customers will renew their license and cloud-based subscriptions and the commissions paid by the Company for such renewals are not commensurate with the commissions paid for new sales. Accordingly, this has resulted in the Company’s capitalized commission costs being amortized to expense over a longer period under the new standard than under the prior guidance. The Company has estimated the customer relationship period to be five years. For additional information on the Company’s accounting policies as a result of the adoption of ASC 606 see Note 13 “Revenue”. The Company adjusted its consolidated financial statements due to the adoption of ASC 606. Select unaudited consolidated financial statements, which reflect the adoption of ASC 606 are as follows: As of December 31, 2017 Adjustments for As Previously ASC 606 Reported Adoption As Adjusted Consolidated Balance Sheet Assets: Deferred commissions, current portion $ 15,195 $ (5,644) $ 9,551 Deferred commissions, net of current portion 3,811 16,593 20,404 Liabilities, redeemable convertible and convertible preferred stock and stockholders' equity (deficit): Deferred revenue, current portion 132,278 (2,113) 130,165 Deferred revenue, net of current portion 31,902 6,633 38,535 Accumulated deficit (279,942) 6,429 (273,513) Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 As Prepared under ASC 605 Adjustments for ASC 606 Adoption As Adjusted As Prepared under ASC 605 Adjustments for ASC 606 Adoption As Adjusted Consolidated Statement of Operations Subscription, license and support $ 38,216 $ 165 $ 38,381 $ 107,783 $ (648) $ 107,135 Services 3,163 (35) 3,128 9,417 (407) 9,010 Total revenue 41,379 130 41,509 117,200 (1,055) 116,145 Gross profit 31,594 130 31,724 91,423 (1,055) 90,368 Sales and marketing 26,905 (917) 25,988 77,929 (2,851) 75,078 Total operating expenses 46,297 (917) 45,380 131,783 (2,851) 128,932 Loss from operations (14,703) 1,047 (13,656) (40,360) 1,796 (38,564) Loss before income taxes (14,624) 1,047 (13,577) (40,061) 1,796 (38,265) Net loss and comprehensive loss (14,646) 1,047 (13,599) (40,169) 1,796 (38,373) Net loss attributable to common stockholders (22,073) 1,047 (21,026) (55,920) 1,796 (54,124) Net loss per share attributable to common stockholders—basic and diluted $ (2.08) $ 0.09 $ (1.99) $ (5.45) $ 0.17 $ (5.27) Nine Months Ended September 30, 2017 Adjustments for As Prepared ASC 606 under ASC 605 Adoption As Adjusted Consolidated Statement of Cash Flows Cash flows from operating activities: Net loss $ (40,169) $ 1,796 $ (38,373) Changes in operating assets and liabilities, excluding the impact of acquisition of businesses: Deferred commissions (1,272) (2,850) (4,122) Deferred revenue $ 22,657 $ 1,054 $ 23,711

Cash Equivalents and Short-term

Cash Equivalents and Short-term Investments	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Cash Equivalents And Short-term Investments	3. CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. The Company’s cash equivalents consist of highly liquid investments in money market funds. The Company considers all high quality investments purchased with original maturities at the date of purchase greater than three months to be short-term investments. Investments are available to be used for current operations and are, therefore, classified as current assets even though maturities may extend beyond one year. Short-term investments are classified as available for sale and are, therefore, recorded at fair value on the consolidated balance sheet, with any unrealized gains and losses reported in accumulated other comprehensive income (loss), which is reflected as a separate component of stockholders’ equity in the Company’s consolidated balance sheets, until realized. The Company uses the specific identification method to compute gains and losses on the investments. The amortized cost of securities is adjusted for amortization of premiums and accretion of discounts to maturity. Such amortization and accretion is included as a component of interest income, net in the consolidated statement of operations. Cash equivalents and short-term investments consist of the following: September 30, 2018 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Cash equivalents: Money market funds $ 56,647 $ — $ — $ 56,647 Total cash equivalents 56,647 — — 56,647 Short-term investments: Commercial paper $ 46,710 $ — $ — $ 46,710 U.S. treasury securities 21,382 — (13) 21,369 Corporate bonds 13,778 — (6) 13,772 Asset-backed securities 12,826 — (11) 12,815 Total short-term investments $ 94,696 $ — $ (30) $ 94,666

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Fair Value of Financial Instruments	4. FAIR VALUE OF FINANCIAL INSTRUMENTS The Company categorizes assets and liabilities recorded or disclosed at fair value on our condensed consolidated balance sheets based upon the level of judgment associated with inputs used to measure their fair value. The categories are as follows: • Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. • Level 2—Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the assets or liabilities, either directly or indirectly. • Level 3—Inputs are unobservable inputs based on our own assumptions used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation. The following tables present information about the Company's financial assets and liabilities measured at fair value on a recurring basis and indicate the level of the fair value hierarchy utilized to determine such fair values: September 30, 2018 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 56,647 $ — $ — $ 56,647 Total cash equivalents $ 56,647 $ — $ — $ 56,647 Short-term investments: Commercial paper $ — $ 46,710 $ — $ 46,710 U.S. treasury securities 21,369 — — 21,369 Corporate bonds — 13,772 — 13,772 Asset-backed securities — 12,815 — 12,815 Total short-term investments $ 21,369 $ 73,297 $ — $ 94,666 December 31, 2017 Level 1 Level 2 Level 3 Total Assets: Money market funds $ 21,597 $ — $ — $ 21,597 Total cash equivalents $ 21,597 $ — $ — $ 21,597 Liabilities: Series D preferred stock warrant liability $ — $ — $ 992 $ 992 Common stock warrant liability — — 1,774 1,774 $ — $ — $ 2,766 $ 2,766 As of September 30, 2018 and December 31, 2017, the Company's cash equivalents, which were invested in money market funds, were valued based on Level 1 inputs. Changes in the fair values of the Company's preferred stock warrant liabilities and common stock warrant liability for the nine months ended September 30, 2018 were as follows: Series D Preferred Stock Common Stock Warrant Liability Warrant Liability Fair value at December 31, 2017 992 1,774 Change in fair value 1,378 7,460 Exercise of common stock warrant — (9,234) Conversion to common stock warrant (2,370) — Fair value at September 30, 2018 $ — $ — Upon the closing of the IPO, the warrants for the purchase of Series D preferred stock became warrants to purchase common stock. The Company valued the Series D preferred stock liability as of the IPO closing date using the Black-Scholes option pricing-model and recorded a change in the fair value of the preferred stock warrants through that date. The Series D preferred stock warrant liability was then reclassified to additional paid-in capital. Additionally, the warrants for the purchase of common stock were exercised to purchase 485,985 shares of common stock upon the closing of the IPO. The Company valued the common stock warrant liability as of the IPO date using the $19 per share offering price and recorded a change in the fair value of the common stock warrants through that date. The common stock warrant liability was then reclassified to common stock and additional paid-in capital.

Property and Equipment, Net

Property and Equipment, Net	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Property and Equipment, Net	5. PROPERTY AND EQUIPMENT, NET September 30, December 31, 2018 2017 Computer equipment $ 14,928 $ 12,349 Computer software 3,693 3,048 Leasehold improvements 6,870 6,327 Furniture and fixtures 3,751 2,870 Office equipment 20 99 Internal-use software 3,880 1,979 33,142 26,672 Less: Accumulated depreciation and amortization (18,350) (14,213) $ 14,792 $ 12,459 For the three months ended September 30, 2018 and 2017, depreciation and amortization expense related to property and equipment, including internal-use software, was $1,615 and $1,417, respectively. During the three months ended September 30, 2018 and 2017, the Company disposed of fully depreciated assets with an original cost of $571 and $0, respectively. For the nine months ended September 30, 2018 and 2017, depreciation and amortization expense related to property and equipment, including internal-use software, was $4,708 and $4,031, respectively. During the nine months ended September 30, 2018 and 2017, the Company disposed of fully depreciated assets with an original cost of $571 and $0, respectively. During the three month ended September 30, 2018 and 2017, the Company capitalized $910 and $237 of costs related to the development of internal-use software and recorded amortization expense of capitalized internal-use software of $115 and $117, respectively. During the nine months ended September 30, 2018 and 2017, the Company capitalized $1,901 and $714 of costs related to the development of internal-use software and recorded amortization expense of capitalized internal-use software of $405 and $302, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Goodwill and Intangible Assets	6. GOODWILL AND INTANGIBLE ASSETS Goodwill was $119,656 as of September 30, 2018 and December 31, 2017. Identifiable intangible assets consisted of the following: September 30, 2018 December 31, 2017 Gross Accumulated Carrying Gross Accumulated Carrying Amount Amortization Value Amount Amortization Value License agreement $ 150 $ (124) $ 26 $ 150 $ (113) $ 37 Developed technology 7,301 (4,440) 2,861 7,301 (3,344) 3,957 Trade name 440 (408) 32 440 (342) 98 Customer relationships 2,950 (2,950) — 2,950 (2,950) — $ 10,841 $ (7,922) $ 2,919 $ 10,841 $ (6,749) $ 4,092 For both three months ended September 30, 2018 and 2017, amortization expense related to intangible assets was $391. For both nine months ended September 30, 2018 and 2017, amortization expense related to intangible assets was $1,173. Estimated future amortization expense of the identifiable intangible assets as of September 30, 2018 is as follows: Year Ending December 31, 2018 (remaining three months) $ 390 2019 1,130 2020 1,015 2021 384 $ 2,919

Debt

Debt	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Debt	7. DEBT As of September 30, 2018 and December 31, 2017, the Company had $0 of outstanding borrowings under its line of credit with a financial institution (the “Line of Credit”).

Preferred Stock

Preferred Stock	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Preferred Stock	8. PREFERRED STOCK Upon the closing of the IPO, all outstanding shares of redeemable convertible and convertible preferred stock automatically converted into shares of common stock and all outstanding warrants to purchase shares of redeemable convertible preferred stock became warrants to purchase shares of common stock. Also, on the date of the IPO, the Company filed a restated certificate of incorporation, which authorized the issuance of preferred stock with rights and preferences designated from time to time by the board of directors. As of September 30, 2018, there were 25,000,000 shares of preferred stock authorized with a par value of $0.001 per share, and no shares of preferred stock issued or outstanding. Prior to the closing of the IPO, certain employees exercised options to purchase 360,385 of Series A preferred stock in exchange for cash proceeds of $211 and the Company adjusted the carrying value of each series of redeemable convertible preferred stock by $199,492. This adjustment resulted in an increase to the net loss attributable to common stockholders for the period. As of December 31, 2017, the liquidation preference of the redeemable convertible preferred stock was $272,506. Immediately prior to the automatic conversion into common stock upon the closing of the IPO, preferred stock consisted of the following: Preferred Preferred Common Stock Shares Shares Issued Carrying Liquidation Issuable Upon Authorized and Outstanding Value Preference Conversion Series A preferred stock 8,800,000 4,212,191 $ 1,721 $ (1) 1,709,063 Series B preferred stock 24,673,917 24,665,856 10,442 22,534 12,332,924 Series C preferred stock 13,283,366 10,105,400 9,540 11,447 5,052,697 Series D preferred stock 11,876,688 11,541,688 109,646 34,500 5,770,841 Series E preferred stock 12,219,202 12,219,202 116,082 48,999 6,109,588 Series E-1 preferred stock 6,415,146 4,739,463 45,025 3,991 2,369,729 Series F preferred stock 25,632,888 25,469,585 241,961 151,035 12,734,781 94,101,207 88,741,194 $ 532,696 $ 272,506 44,370,560 (1) The liquidation preference of the Series A preferred stock was calculated based on a percentage of the proceeds received by the Company in the event of a Deemed Liquidation Event. The holders of the Series A preferred stock did not have redemption rights other than in the event of a Deemed Liquidation Event.

Preferred Stock Warrants and Co

Preferred Stock Warrants and Common Stock Warrants	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Preferred Stock Warrants and Common Stock Warrants	9. PREFERRED STOCK WARRANTS AND COMMON STOCK WARRANTS Immediately prior to the IPO, warrants outstanding consisted of the following: Issuance Date Underlying Security Exercise Number of Warrant Classification July 1, 2012 Common stock $ 485,985 (1) (1) Liability August 22, 2013 Series D preferred stock $ 10 years Liability June 27, 2014 Series D preferred stock $ 9.2 years Liability July 31, 2014 Common stock $ 10 years Equity (1) The number of shares of common stock issuable upon the exercise of the Company’s liability‑classified warrant to purchase common stock is calculated based on the number of shares of common stock equal to 12.5% of the sum of (a) the number of shares of common stock into which the outstanding shares of Series A preferred stock, including shares issuable upon the exercise of outstanding options to purchase shares of Series A preferred stock, convert upon an IPO and (b) the number of shares of common stock underlying the warrant. Such warrant is only exercisable upon the closing of an IPO of shares of the Company’s common stock. The warrant will expire, if not exercised, on the day immediately following the closing of an IPO of shares of the Company’s common stock. Upon closing of the IPO, the common stock warrant with an issuance date of July 1, 2012, became exercisable and was net exercised at an exercise price of $0.002 per share to purchase 485,985 shares of common stock. Upon the closing of the IPO, the warrants to purchase the Series D preferred stock became warrants to purchase common stock. Subsequent to the IPO and during the three months ended June 30, 2018, these common stock warrants were net exercised at an exercise price of $2.9891 per share to purchase 130,965 shares of common stock. Subsequent to the IPO and during the three months ended June 30, 2018, the common stock warrant with an issuance date of July 31, 2014, was net exercised at an exercise price of $3.02 per share to purchase 95,113 shares of common stock. As of September 30, 2018, there were no preferred stock warrants or common stock warrants outstanding.

Equity Award Plans

Equity Award Plans	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Equity Award Plans	10. EQUITY AWARD PLANS Options to Purchase Series A Preferred Stock Upon the closing of the IPO, all outstanding shares of Series A preferred stock options converted into common stock options at the Series A preferred stock conversion rate. The following table summarizes the Company’s Series A preferred stock option activity since December 31, 2017: Weighted- Weighted- Average Remaining Aggregate Number of Average Contractual Term Intrinsic Shares Exercise Price (in years) Value Outstanding at December 31, 2017 4,689,576 $ 0.98 5.18 $ 10,539 Granted 195,312 3.60 Exercised (360,385) 0.59 Forfeited (351,562) 0.52 Converted to common stock options upon IPO (4,172,941) 1.18 Outstanding at September 30, 2018 — The assumptions that the Company used to determine the fair value of the Series A preferred stock options granted to employees and directors were as follows: Nine Months Ended September 30, 2018 2017 Risk-free interest rate 2.74 % 2.17 % Expected term (in years) 6.25 6.25 Expected volatility 43.85 % 47.42 % Expected dividend yield — % — % Options to Purchase Common Stock The following table summarizes the Company’s common stock option activity since December 31, 2017 under all common stock option plans: Weighted- Weighted- Average Remaining Aggregate Number of Average Contractual Term Intrinsic Shares Exercise Price (in years) Value Outstanding at December 31, 2017 14,183,221 $ 4.89 7.16 $ 17,626 Granted 3,267,775 13.54 Exercised (765,998) 4.10 Forfeited (707,256) 6.42 Series A options converted to common stock options upon IPO 1,693,197 2.90 Series E-1 options converted to common stock options upon IPO 837,835 0.86 Outstanding at September 30, 2018 18,508,774 $ 6.02 6.82 $ 282,233 Vested and expected to vest at September 30, 2018 17,895,791 $ 5.87 6.75 $ 275,452 Options exercisable at September 30, 2018 11,323,339 $ 3.96 5.63 $ 194,951 Upon the closing of the IPO, options to purchase 837,835 shares of the Company’s Series E-1 Preferred Stock options converted to options to purchase 837,835 shares of common stock. The assumptions that the Company used to determine the fair value of the common stock options granted to employees and directors were as follows: Nine Months Ended September 30, 2018 2017 Risk-free interest rate 2.74-2.98 % 1.96-2.17 % Expected term (in years) 6.25 6.25 Expected volatility 43.29-43.85 % 45.85-47.42 % Expected dividend yield — % — % Restricted Stock Unit (“RSU”) Activity The following table summarizes the Company’s RSU activity since December 31, 2017 under all common stock option plans: Weighted ‑ Weighted ‑ Average Average Remaining Aggregate Number of Grant Date Fair Contractual Term Intrinsic Shares Value Per Share (in years) Value Outstanding at December 31, 2017 — $ — — $ — Granted 502,221 10.99 Vested — Forfeited — Outstanding at September 30, 2018 502,221 1.47 $ 10,637 RSUs vested and expected to vest at September 30, 2018 452,399 1.38 $ 9,582 RSUs vested and exercisable at September 30, 2018 — — Stock-Based Compensation Stock-based compensation expense was classified in the unaudited consolidated statements of operations and comprehensive loss as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Cost of subscription, license and support revenue $ 156 $ 113 $ 429 $ 272 Cost of services revenue 82 56 212 167 Sales and marketing expense 1,541 805 3,705 2,422 Research and development expense 748 656 2,206 1,926 General and administrative expense 1,067 652 2,918 1,862 $ 3,594 $ 2,282 $ 9,470 $ 6,649 As of September 30, 2018, total unrecognized compensation cost related to the unvested common stock-based awards was $32,344, which is expected to be recognized over weighted-average periods of 2.54 years. As of September 30, 2018, total unrecognized compensation cost related to these performance-based RSUs was $4,427 to be amortized over a weighted-average period of approximately 2.96 years. 2018 Stock Option and Incentive Plan On April 17, 2018, the Company’s board of directors adopted, and on April 19, 2018, the Company’s stockholders approved, the 2018 Stock Option and Incentive Plan (the “2018 Plan”), which became effective on May 2, 2018, the date immediately preceding the effectiveness of the registration statement for the Company’s IPO. The 2018 Plan provides for the grant of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock units, restricted stock awards, unrestricted stock awards and dividend equivalent rights. The number of shares initially reserved for issuance under the 2018 Plan is 6,075,051, plus the shares of common stock remaining available for issuance under the Company’s 2012 Stock Option and Grant Plan (the “2012 Plan”), which will be automatically increased on January 1, 2019 and each January 1 thereafter by 5% of the number of shares of the Company’s common stock outstanding on the immediately preceding December 31 or a lesser number of shares determined by the Company’s board of directors or the compensation committee of the board of directors. The shares of common stock underlying any awards that are forfeited, canceled, held back upon exercise or settlement of an award to satisfy the exercise price or tax withholding, reacquired by the Company prior to vesting, satisfied without any issuance of stock, expire or are otherwise terminated by the Company under the 2018 Plan, the 2012 Plan and the Company’s Amended and Restated Equity Incentive Plan will be added back to the shares of common stock available for issuance under the 2018 Plan. 2018 Employee Stock Purchase Plan On April 17, 2018, the Company’s board of directors adopted, and on April 19, 2018, the Company’s stockholders approved, the 2018 Employee Stock Purchase Plan (the “ESPP”), which became effective on May 2, 2018, the date immediately preceding the effectiveness of the registration statement for the Company’s IPO. A total of 1,735,729 shares of common stock were reserved for issuance under this plan. In addition, the number of shares of common stock that may be issued under the ESPP will be cumulatively increased on January 1, 2019 and each January 1 thereafter through January 1, 2028, by the lesser of (i) 1% of the number of shares of the Company’s common stock outstanding on the immediately preceding December 31, (ii) 1,735,729 shares of common stock or (iii) such lesser number of shares as determined by the compensation committee of the board of directors.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Commitments and Contingencies	11. COMMITMENTS AND CONTINGENCIES Operating Leases The Company leases office facilities under various non‑cancelable operating leases that expire at various dates through June 2027. Rent expense for non‑cancelable operating leases with free rental periods or scheduled rent increases is recognized using the straight‑line method over the term of the lease. Improvement reimbursements from landlords are amortized on a straight‑line basis into rent expense over the terms of the leases. The difference between required lease payments and straight‑lined rent expense is recorded as deferred rent. Rent expense related to the Company's leased office space was $3,353 and $2,615 for the nine months ended September 30, 2018 and 2017, respectively. The following table summarizes the future minimum lease payments due under operating leases as of September 30, 2018: Year Ending December 31, 2018 (remaining three months) $ 1,275 2019 5,263 2020 5,107 2021 4,945 2022 2,164 Thereafter 1,843 $ 20,597 Hosting Services Agreement In September 2017, the Company entered a non‑cancelable contractual agreement related to the hosting of its data processing, storage and other computing services. The agreement, as amended, expires in November 2020. The following table summarizes the future minimum payments committed under the hosting agreement as of September 30, 2018: Year Ending December 31, 2018 (remaining three months) $ 5,611 2019 15,333 2020 10,667 $ 31,611 Indemnifications Under the indemnification provisions of the Company's standard sales‑related contracts, the Company agreed to defend end‑customers against third‑party claims asserting infringement of certain intellectual property rights, which may include patents, copyrights, trademarks, or trade secrets, and to pay judgments entered on such claims. The Company's exposure under these indemnification provisions is generally limited to the total amount paid by the end‑customer under the agreement. However, certain agreements include indemnification provisions that could potentially expose the Company to losses in excess of the amount received under the agreement. In addition, the Company indemnifies its officers, directors and certain key employees while they are serving in good faith in their capacities. Through September 30, 2018, there have been no claims under any indemnification provisions. Litigation On March 21, 2018, Finjan, Inc. (“Finjan”) filed a complaint in the U.S. District Court for the Northern District of California alleging that the Company's products and services infringe at least four U.S. patents purportedly owned by Finjan, seeking, among other things, a judgment holding that the Company has infringed four asserted patents, a preliminary and permanent injunction preventing alleged continued infringement of one of the asserted patents, past damages not less than a reasonable royalty, enhanced damages for alleged willful infringement, costs and reasonable attorneys' fees, and pre‑ and post‑judgment interest. While the Company does not believe the complaint has merit, on April 6, 2018, the Company entered into a settlement agreement with Finjan, resolving all claims made pursuant to the complaint. In connection with the settlement agreement, the Company accrued a liability of $3,900 as of March 31, 2018, which is reflected in general and administrative expenses on the Company’s unaudited consolidated statements of operations and comprehensive loss and accrued expenses on the Company’s unaudited consolidated balance sheet, reflecting the aggregate amount of payments to be made to Finjan pursuant to the settlement, all of which will be paid in 2018. In April 2018, the complaint was dismissed and the Company made the first payment of $1,300. The second payment of $1,300 was made in September 2018. From time to time the Company may become involved in legal proceedings or be subject to claims arising in the ordinary course of business. Although the results of litigation and claims cannot be predicted with certainty, the Company currently believes that the final outcome of these ordinary course matters will not have a material adverse effect on its business, operating results, financial condition or cash flows. Regardless of the outcome, litigation can have an adverse impact because of defense and settlement costs, diversion of management resources and other factors.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Income Taxes	12. INCOME TAXES During the nine months ended September 30, 2018 and 2017, the Company recorded an income tax provision of $241 and $108, respectively, primarily due to foreign income taxes. In connection with the Tax Cuts and Jobs Act (the “Act”) enacted in December 2017, the Company made provisional estimates of the effects of the Act on its existing deferred tax balances and the one-time transition tax for the year end December 31, 2017. The Act did not have significant impact on the Company’s consolidated financial statements for the year ended December 31, 2017 as a result of the valuation allowance maintained against the Company’s U.S. deferred tax assets. However, the Company’s provisional estimate associated with the reduction in the U.S. federal corporate tax rate from 35% to 21% impacted the change in valuation allowance and tax rate change components of the Company’s effective tax rate reconciliation as well as its ending deferred tax assets, deferred tax liabilities and valuation allowance. The Company has an accumulated deficit from its foreign operations and does not have a transition tax associated with deferred foreign earnings related to the Act. The income tax provision for the nine months ended September 30, 2018 did not reflect any adjustment to the provisional amounts previously recorded. The ultimate impact of the Act may differ from these provisional amounts due to, among other things, additional analysis, changes in interpretations and assumptions the Company has made and additional regulatory guidance that may be issued. The Company’s accounting treatment is expected to be complete in the fourth quarter of 2018.

Revenue

Revenue	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Revenue	13. REVENUE The Company generates revenue through relationships with channel partners and through its direct sales force primarily from three sources: (i) the sale of subscription (i.e., term-based) and perpetual licenses for the Company’s Cb Protection and Cb Response software products along with access to and the right to utilize the threat intelligence capabilities of the Cb Predictive Security Cloud, as well as maintenance services and customer support (collectively, “support”), (ii) cloud-based software-as-a-service (“SaaS”) subscriptions for access to the Company’s Cb Response and Cb Defense software products, and (iii) professional services and training (collectively, “services”). In accordance with ASC 606, revenue is recognized when a customer obtains control of promised products or services. The amount of revenue recognized reflects the consideration that the Company expects to be entitled to receive in exchange for these products or services. The Company applies the following five steps to recognize revenue: 1) Identification of the contract, or contracts, with a customer The Company considers the terms and conditions of its contracts and its customary business practices to identify contracts under ASC 606. The Company considers that it has a contract with a customer when the contract is approved, the Company can identify each party’s rights regarding the products or services to be transferred, the Company can identify the payment terms for the products or services to be transferred, the Company has determined that the customer has the ability and intent to pay, and the contract has commercial substance. The Company applies judgment in determining the customer’s ability and intention to pay, which is based on a variety of factors, including the customer’s historical payment experience or, in the case of a new customer, credit and financial information pertaining to the customer. 2) Identification of the performance obligation(s) in the contract Performance obligations promised in a contract are identified based on the products or services that will be transferred to the customer that are capable of being distinct, whereby the customer can benefit from the product or services either on their own or together with other resources that are readily available from third parties or from the Company, and are distinct in the context of the contract, whereby the transfer of the products or services is separately identifiable from other promises in the contract. To the extent a contract includes multiple promised products or services, the Company applies judgment to determine whether promised products or services are capable of being distinct, and are distinct in the context of the contract. If these criteria are not met, the promised products or services are accounted for as a combined performance obligation. 3) Determination of the transaction price The transaction price is determined based on the consideration that the Company will be entitled to in exchange for transferring products or services to the customer. Variable consideration is included in the transaction price, if, in the Company’s judgment, it is probable that no significant future reversal of cumulative revenue under the contract will occur. In instances where the timing of revenue recognition differs from the timing of invoicing, the Company has determined that its contracts generally do not include a significant financing component. The primary purpose of the Company’s invoicing terms is to provide customers with simplified and predictable ways of purchasing its products and services, not to receive financing from its customers or to provide customers with financing. An example is invoicing at the beginning of a subscription term with revenue recognized ratably over the contract period. 4) Allocation of the transaction price to performance obligations in the contract If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on relative standalone selling price (“SSP”) basis. The Company determines SSP based on the price at which the performance obligation is sold separately. If the SSP is not observable through past transactions, the Company estimates the SSP taking into account available information such as market conditions and internally approved pricing guidelines related to the performance obligation. 5) Recognition of revenue when, or as, a performance obligation is satisfied Revenue is recognized at the time the related performance obligation is satisfied by transferring the promised product or service to a customer. The Company recognizes revenue when it transfers control of the products or services to the customer for an amount that reflects the consideration that the Company expects to receive in exchange for those products or services. Subscription, License and Support Revenue Substantially all of the Company’s software arrangements contain multiple performance obligations that include a combination of software licenses, cloud-based subscriptions, support, professional services and training. The Company’s Cb Protection and Cb Response products are offered through subscription or perpetual software licenses, with a substantial majority of its customers selecting a subscription license. Subscription licenses include access to and the right to utilize the threat intelligence capabilities of the Cb Predictive Security Cloud as well as ongoing support, which provides customers with telephone and web-based support, bug fixes and repairs and software updates on a when-and-if-available basis. The Cb Predictive Security Cloud automatically distributes real-time threat intelligence, such as detection algorithms, reputation scores and attack classifications, to the Company’s customers. Substantially all customers who purchase licenses on a perpetual basis also purchase an agreement for support and an agreement for access to and the right to utilize the threat intelligence capabilities of the Cb Predictive Security Cloud. For subscription or perpetual license sales of Cb Protection and Cb Response, the Company considers the software license and access to the threat intelligence capabilities of the Cb Predictive Security Cloud to be a single performance obligation. Subscription (i.e. term-based) revenue is recognized on a ratable basis over the contract term beginning on the date the software is delivered to the customer. Revenue for cloud-based subscriptions is recognized on a ratable basis over the term of the subscription beginning on the date the customer is given access to the platform. Maintenance services and customer support revenue related to subscription licenses is recognized ratably over the term of the maintenance and support arrangement as this performance obligation is satisfied. Revenue from the infrequent sales of perpetual software licenses is recognized ratably over the customer’s estimated economic life, which the Company has estimated to be five years, beginning on the date the software is delivered to the customer. Maintenance services and customer support revenue related to perpetual licenses is recognized ratably over the term of the maintenance and support arrangement as this performance obligation is satisfied. Services Revenue The Company provides professional services to customers, primarily in the form of deployment, and training services. Services are typically sold together with licenses of the Company’s software products and, to a lesser extent, on a stand-alone basis. Services are priced separately and are considered distinct from the Company’s software license. The professional services can be performed by a third party and have a history of consistent pricing by the Company. Professional services are sold as time-and-materials contracts based on the number of hours worked and at contractually agreed-upon hourly rates, and also on a fixed-fee basis. Revenue from professional services and training sold on a stand-alone basis or in a combined arrangement is recognized as those services are rendered as control of the services passes to the customer over time. The Company’s employees may incur out-of-pocket expenses when providing services to customers that are reimbursable from the customer under the terms of the service contract. The Company bills any out-of-pocket expenses incurred in the performance of these services to the customer. The expenses are classified on a gross basis as revenue and costs of revenue in the unaudited consolidated statements of operations and comprehensive loss. The Company’s determination of a gross presentation is based on an assessment of the relevant facts and circumstances, including the fact that the Company’s customers, rather than the Company, benefit from the expenditures and the Company bears the credit risk of the reimbursement until it receives reimbursement from the customer. Variable Consideration Revenue is recorded at the net sales price, which is the transaction price. The Company does not offer refunds, rebates or credits to customers in the normal course of business. The impact of variable consideration has not been material. Contract Costs The Company capitalizes commission costs that are incremental and directly related to the acquisition of customer agreements. Commissions are earned by the Company’s sales force and paid in full upon the receipt of customer orders for new arrangements or renewals. Commission costs are capitalized when earned and are amortized as expense over an estimated customer relationship period of 5 years. The Company determined the estimated customer relationship period by taking into consideration the contractual term and expected renewals of customer contracts, its technology and other factors, including the fact that commissions paid on renewals are not commensurate with commissions paid on new sales. Commissions paid relating to contract renewals are deferred and amortized over the related renewal period. Costs to obtain a contract for service arrangements are expensed as incurred in accordance with the practical expedient as the contractual period for services is one year or less. As of September 30, 2018 and December 31, 2017, the Company recorded $34,972 and $29,955, respectively, of deferred commission costs in the consolidated balance sheet. As of September 30, 2017 and December 31, 2016, the Company recorded $25,815 and $21,693 of deferred commission costs in the consolidated balance sheet. Commission costs capitalized as deferred commissions during the nine months ended September 30, 2018 and 2017 totaled $14,253 and $11,230, respectively. Amortization of deferred commissions during the nine months ended September 30, 2018 and 2017 totaled $9,236 and $7,108, respectively, and is included in sales and marketing expense in the unaudited consolidated statements of operations and comprehensive loss. The Company periodically reviews these deferred costs to determine whether events or changes in circumstances have occurred that could impact the period of benefit of these deferred sales commissions. The Company does not incur any material costs to fulfill customer contracts. Deferred Revenue Contract liabilities consist of deferred revenue and include payments received in advance of performance under the contract. Such amounts are recognized as revenue over the contractual period. During the nine months ended September 30, 2018, the Company recognized revenue of $110,482 which was included in the deferred revenue balance as of December 31, 2017. The Company receives payments from customers based upon contractual billing schedules; accounts receivable are recorded when the right to consideration becomes unconditional. The Company generally bills its customers in advance, and payment terms on invoiced amounts are typically 30 to 90 days. Contract costs include amounts related to our contractual right to consideration for completed and partially completed performance obligations that may not have been invoiced; such amounts have been insignificant to date. Major products and services Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Subscription and support revenue $ 33,113 $ 29,567 $ 97,855 $ 85,567 Cloud-based subscription revenue 16,142 7,147 41,502 16,669 Perpetual license revenue 1,569 1,667 4,749 4,899 Services revenue 2,591 3,128 8,735 9,010 Total revenue $ 53,415 $ 41,509 $ 152,841 $ 116,145 Geographic revenue Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 United States $ 44,206 $ 35,439 $ 126,926 $ 100,605 All other 9,209 6,070 25,915 15,540 Total revenue $ 53,415 $ 41,509 $ 152,841 $ 116,145 Transaction price allocated to remaining performance obligations Transaction price allocated to remaining performance obligations represents contracted revenue that has not yet been recognized, which includes deferred revenue and backlog. The Company defines backlog as contractually committed orders for subscriptions and support services for which the associated revenue has not been recognized and the customer has not been invoiced. As of September 30, 2018, the aggregate amount of the transaction price allocated to remaining performance obligations was $176,831 in deferred revenue and $38,660 in backlog. The Company expects to recognize these remaining performance obligations as follows (in percentages): More than Total Less than 1 year 1-2 Years 2 years Deferred revenue 100 % 78 % 15 % 7 % Backlog 100 % 42 % 40 % 18 % Concentration Risk As of September 30, 2018, two channel partners accounted for 26.2% and 12.3% of outstanding accounts receivable, respectively. As of December 31, 2017, two channel partners accounted for 20.2% and 16.2% of outstanding accounts receivable, respectively. For the three and nine months ended September 30, 2018, two channel partners represented 19.9% and 20.1% and 21.2% and 18.5%, respectively, of total revenue. During the three and nine months ended September 30, 2017, one channel partner represented 26.0% and 26.6% of total revenue, respectively.

Net Loss per Share

Net Loss per Share	9 Months Ended
	Sep. 30, 2018
Disclosure Text Block
Net Loss Per Share	14. NET LOSS PER SHARE Net Loss per Share Basic and diluted net loss per share attributable to common stockholders was calculated as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Numerator: Net loss $ (17,632) $ (13,599) $ (63,507) $ (38,373) Accretion of preferred stock to redemption value — (7,427) (199,492) (15,751) Net loss attributable to common stockholders $ (17,632) $ (21,026) $ (262,999) $ (54,124) Denominator: Weighted-average number of common shares outstanding—basic and diluted 67,837,240 10,587,153 41,494,203 10,263,962 Net loss per share attributable to common stockholders—basic and diluted $ (0.26) $ (1.99) $ (6.34) $ (5.27) The Company’s potentially dilutive securities, which include stock options, redeemable convertible and convertible preferred stock, and warrants to purchase common stock and preferred stock, have been excluded from the computation of diluted net loss per share as the effect would be to reduce the net loss per share. Therefore, the weighted‑average number of common shares outstanding used to calculate both basic and diluted net loss per share attributable to common stockholders is the same. The Company excluded the following potential common shares, presented based on amounts outstanding at each period end, from the computation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti‑dilutive effect: As of September 30, 2018 2017 Options to purchase common stock 18,508,774 14,541,159 Unvested restricted stock units 502,221 — Options to purchase Series E-1 preferred stock (as converted to common stock) — 837,835 Warrants to purchase common stock — 106,250 Warrants to purchase redeemable convertible preferred stock (as converted to common stock) — 167,500 Redeemable convertible preferred stock (as converted to common stock) — 44,370,560 19,010,995 60,023,304 The table above excludes shares of common stock issuable upon the conversion of Series A preferred stock and upon the exercise of options to purchase shares of Series A preferred stock as such shares are only convertible into common stock upon the closing of an IPO. The table also excludes shares of common stock issuable upon the exercise of the Company’s liability-classified common stock warrant as the warrant is only exercisable upon the closing of an IPO.

Overview and Basis of Present_2

Overview and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2018
Policy Text Blocks
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting standards (“GAAP”) for interim financial information and include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The Company’s condensed consolidated financial statements are unaudited, but include all adjustments of a normal recurring nature necessary for a fair presentation of the quarterly results. The Company has made estimates and judgments affecting the amounts reported in the condensed consolidated financial statements and the accompanying notes. The actual results that the Company experiences may differ materially from the Company’s estimates. The Company’s condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company’s final prospectus for its IPO dated as of May 4, 2018 and filed with the SEC pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended. Effective January 1, 2018, the Company adopted the requirements of Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASC 606”) on a full retrospective basis as discussed in detail in Note 2. All amounts and disclosures set forth in this Quarterly Report on Form 10-Q have been updated to comply with ASC 606.
New Accounting Pronouncements	Internal-Use Software In August 2018, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40) (“ASU 2018-15”). ASU 2018-15 was issued in order to address a customer's accounting for implementation costs incurred in a cloud computing arrangement (“CCA”) that is considered a service contract. Under this guidance, implementation costs for a CCA should be evaluated for capitalization using the same approach as implementation costs associated with internal-use software. The capitalized implementation costs should be expensed over the term of the hosting arrangement, which includes any reasonably certain renewal periods. The pronouncement is effective for fiscal years beginning after December 15, 2019, with early adoption permitted. The Company is currently evaluating the impact of this pronouncement on its consolidated financial statements. Stock Compensation In June 2018, the FASB issued ASU No. 2018-07, Compensation – Stock Compensation (Topic 718) (“ASU 2018-07”). ASU 2018-07 was issued in order to expand the guidance for stock-based compensation, to include share-based payment transactions for acquiring goods and services from nonemployees. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. The Company does not expect the adoption of the new accounting standard to have a material impact on its consolidated financial statements. Comprehensive Income In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (“ASU 2018-02”), which provides for the reclassification of the effect of remeasuring deferred tax balances related to items within accumulated other comprehensive income to retained earnings resulting from the Tax Cuts and Jobs Act, or Tax Act. The guidance is effective for annual reporting periods beginning after December 15, 2018, including interim periods within that reporting period. Early adoption is permitted. The Company does not expect the adoption of the new accounting standard to have a material impact on its consolidated financial statements. Leases In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”). ASU 2016-02 was issued to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The new standard will be effective for the Company on January 1, 2019. Companies are required to use a modified retrospective approach, with the option of applying the requirements of the standard either (1) retrospectively to each prior comparative reporting period presented, or (2) retrospectively at the beginning of the period of adoption. The Company plans to adopt this standard in the first quarter of 2019 by applying the requirements to the beginning of the period of adoption through a cumulative-effect adjustment. The Company is in the process of identifying the population of potential lease arrangements and evaluating these arrangements in the context of the new guidance. While the Company continues to evaluate the effect of adoption on its consolidated financial statements, the Company expects the adoption will result in the recognition of right-of-use assets and lease liabilities that were not previously recognized, which will increase total assets and liabilities on the Company’s consolidated balance sheet. Recently adopted accounting pronouncement:
Revenue	Revenue In May 2014, the FASB issued ASC 606, which supersedes existing revenue recognition guidance under GAAP. The Company adopted ASC 606 effective January 1, 2018 using the full retrospective method, which required the Company to restate each prior reporting period presented for the impact of adoption of the standard. The Company’s recognition of total revenue related to subscription (i.e., term-based) licenses, cloud-based subscriptions, access to the threat intelligence capabilities of the Cb Predictive Security Cloud, maintenance services and customer support, and stand-alone professional services remain substantially unchanged under the new standard. However, as further discussed herein, the timing of recognition related to certain aspects of subscription (i.e. term-based) licenses, perpetual licenses and associated professional services is different under the new standard. For subscription license sales of Cb Protection and Cb Response, under the new standard, the Company considers the software license and the access to the threat intelligence capabilities of the Cb Predictive Security Cloud, which provides continuous updates of real-time threat intelligence, to be a single performance obligation. As a result, the arrangement consideration allocated to the software license is deferred on the Company’s balance sheet and recognized ratably over the term of the subscription as the performance obligation is satisfied. However, under the new standard, the Company is no longer required to delay the commencement of revenue recognition of subscription licenses until the commencement of any professional services and training sold with the subscription license due to the lack of vendor - specific objective evidence ("VSOE") of its longest delivered service elements, maintenance and support. While under the new standard, maintenance services and customer support related to subscription licenses are a stand-alone performance obligation, the related revenue continues to be recognized ratably over the term of the maintenance and support arrangement as the performance obligation is satisfied. For its infrequent sales of perpetual licenses of Cb Protection and Cb Response, prior to the adoption of ASC 606, the Company recognized revenue ratably over the longest service period of any deliverable in the arrangement, which was generally the maintenance and support term, due to the lack of VSOE of fair value for its maintenance and support offerings. Under the new standard, the Company is no longer required to delay revenue recognition of perpetual licenses until the commencement of any bundled professional services and training sold with the perpetual license. Further, the Company recognizes the revenue related to the sale of perpetual software licenses ratably over the customer’s estimated economic life, which the Company has estimated to be five years, rather than over the initially committed period of maintenance and support. In addition, under the new standard, for subscription and perpetual licenses that are sold with professional services in a combined arrangement, the professional services represent a separate performance obligation and the Company recognizes revenue associated with the professional services as such services are performed. Revenue associated with professional services sold in a combined arrangement with subscription and perpetual licenses was previously recognized ratably over the longest service period of any deliverable in the arrangement, which was generally the maintenance and support term, due to the lack of VSOE of fair value for the Company’s maintenance and support offerings. Another significant provision of the new standard requires the capitalization and amortization of costs associated with obtaining a contract, such as sales commissions. Under the new standard, all incremental costs to acquire a contract are capitalized and amortized using a systematic basis over the pattern of transfer of the goods and services to which the asset relates. Under the previous standard, the Company capitalized commission costs that were incremental and directly related to the acquisition of a customer arrangement. The commission costs were capitalized when earned and were amortized as expense over the period that the revenue was recognized for the related non-cancelable customer arrangement in proportion to the recognition of revenue, without regard to anticipated customer renewals. Under the new standard, the Company continues to capitalize all incremental commission costs to obtain a customer arrangement, but now amortizes the capitalized costs on a straight-line basis over the estimated customer relationship period, which includes anticipated customer renewals, because the Company anticipates that a majority of customers will renew their license and cloud-based subscriptions and the commissions paid by the Company for such renewals are not commensurate with the commissions paid for new sales. Accordingly, this has resulted in the Company’s capitalized commission costs being amortized to expense over a longer period under the new standard than under the prior guidance. The Company has estimated the customer relationship period to be five years. For additional information on the Company’s accounting policies as a result of the adoption of ASC 606 see Note 13 “Revenue”. The Company adjusted its consolidated financial statements due to the adoption of ASC 606. Select unaudited consolidated financial statements, which reflect the adoption of ASC 606 are as follows: As of December 31, 2017 Adjustments for As Previously ASC 606 Reported Adoption As Adjusted Consolidated Balance Sheet Assets: Deferred commissions, current portion $ 15,195 $ (5,644) $ 9,551 Deferred commissions, net of current portion 3,811 16,593 20,404 Liabilities, redeemable convertible and convertible preferred stock and stockholders' equity (deficit): Deferred revenue, current portion 132,278 (2,113) 130,165 Deferred revenue, net of current portion 31,902 6,633 38,535 Accumulated deficit (279,942) 6,429 (273,513) Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 As Prepared under ASC 605 Adjustments for ASC 606 Adoption As Adjusted As Prepared under ASC 605 Adjustments for ASC 606 Adoption As Adjusted Consolidated Statement of Operations Subscription, license and support $ 38,216 $ 165 $ 38,381 $ 107,783 $ (648) $ 107,135 Services 3,163 (35) 3,128 9,417 (407) 9,010 Total revenue 41,379 130 41,509 117,200 (1,055) 116,145 Gross profit 31,594 130 31,724 91,423 (1,055) 90,368 Sales and marketing 26,905 (917) 25,988 77,929 (2,851) 75,078 Total operating expenses 46,297 (917) 45,380 131,783 (2,851) 128,932 Loss from operations (14,703) 1,047 (13,656) (40,360) 1,796 (38,564) Loss before income taxes (14,624) 1,047 (13,577) (40,061) 1,796 (38,265) Net loss and comprehensive loss (14,646) 1,047 (13,599) (40,169) 1,796 (38,373) Net loss attributable to common stockholders (22,073) 1,047 (21,026) (55,920) 1,796 (54,124) Net loss per share attributable to common stockholders—basic and diluted $ (2.08) $ 0.09 $ (1.99) $ (5.45) $ 0.17 $ (5.27) Nine Months Ended September 30, 2017 Adjustments for As Prepared ASC 606 under ASC 605 Adoption As Adjusted Consolidated Statement of Cash Flows Cash flows from operating activities: Net loss $ (40,169) $ 1,796 $ (38,373) Changes in operating assets and liabilities, excluding the impact of acquisition of businesses: Deferred commissions (1,272) (2,850) (4,122) Deferred revenue $ 22,657 $ 1,054 $ 23,711

New Accounting Pronouncements (

New Accounting Pronouncements (Tables)	9 Months Ended
	Sep. 30, 2018
Accounting Standards Update 2014-09
Table Text Blocks
Schedule of changes in financial statements due to adoption of ASC 606	As of December 31, 2017 Adjustments for As Previously ASC 606 Reported Adoption As Adjusted Consolidated Balance Sheet Assets: Deferred commissions, current portion $ 15,195 $ (5,644) $ 9,551 Deferred commissions, net of current portion 3,811 16,593 20,404 Liabilities, redeemable convertible and convertible preferred stock and stockholders' equity (deficit): Deferred revenue, current portion 132,278 (2,113) 130,165 Deferred revenue, net of current portion 31,902 6,633 38,535 Accumulated deficit (279,942) 6,429 (273,513) Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 As Prepared under ASC 605 Adjustments for ASC 606 Adoption As Adjusted As Prepared under ASC 605 Adjustments for ASC 606 Adoption As Adjusted Consolidated Statement of Operations Subscription, license and support $ 38,216 $ 165 $ 38,381 $ 107,783 $ (648) $ 107,135 Services 3,163 (35) 3,128 9,417 (407) 9,010 Total revenue 41,379 130 41,509 117,200 (1,055) 116,145 Gross profit 31,594 130 31,724 91,423 (1,055) 90,368 Sales and marketing 26,905 (917) 25,988 77,929 (2,851) 75,078 Total operating expenses 46,297 (917) 45,380 131,783 (2,851) 128,932 Loss from operations (14,703) 1,047 (13,656) (40,360) 1,796 (38,564) Loss before income taxes (14,624) 1,047 (13,577) (40,061) 1,796 (38,265) Net loss and comprehensive loss (14,646) 1,047 (13,599) (40,169) 1,796 (38,373) Net loss attributable to common stockholders (22,073) 1,047 (21,026) (55,920) 1,796 (54,124) Net loss per share attributable to common stockholders—basic and diluted $ (2.08) $ 0.09 $ (1.99) $ (5.45) $ 0.17 $ (5.27) Nine Months Ended September 30, 2017 Adjustments for As Prepared ASC 606 under ASC 605 Adoption As Adjusted Consolidated Statement of Cash Flows Cash flows from operating activities: Net loss $ (40,169) $ 1,796 $ (38,373) Changes in operating assets and liabilities, excluding the impact of acquisition of businesses: Deferred commissions (1,272) (2,850) (4,122) Deferred revenue $ 22,657 $ 1,054 $ 23,711

Cash Equivalents and Short term

Cash Equivalents and Short term Investments (Tables)	9 Months Ended
	Sep. 30, 2018
Table Text Blocks
Schedule of cash equivalents and short-term investments	September 30, 2018 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Cash equivalents: Money market funds $ 56,647 $ — $ — $ 56,647 Total cash equivalents 56,647 — — 56,647 Short-term investments: Commercial paper $ 46,710 $ — $ — $ 46,710 U.S. treasury securities 21,382 — (13) 21,369 Corporate bonds 13,778 — (6) 13,772 Asset-backed securities 12,826 — (11) 12,815 Total short-term investments $ 94,696 $ — $ (30) $ 94,666

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2018
Table Text Blocks
Schedule of financial assets and liabilities measured at fair value on a recurring basis	September 30, 2018 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 56,647 $ — $ — $ 56,647 Total cash equivalents $ 56,647 $ — $ — $ 56,647 Short-term investments: Commercial paper $ — $ 46,710 $ — $ 46,710 U.S. treasury securities 21,369 — — 21,369 Corporate bonds — 13,772 — 13,772 Asset-backed securities — 12,815 — 12,815 Total short-term investments $ 21,369 $ 73,297 $ — $ 94,666 December 31, 2017 Level 1 Level 2 Level 3 Total Assets: Money market funds $ 21,597 $ — $ — $ 21,597 Total cash equivalents $ 21,597 $ — $ — $ 21,597 Liabilities: Series D preferred stock warrant liability $ — $ — $ 992 $ 992 Common stock warrant liability — — 1,774 1,774 $ — $ — $ 2,766 $ 2,766
Schedule of changes in fair values of preferred stock warrant liabilities and common stock warrant liability	Series D Preferred Stock Common Stock Warrant Liability Warrant Liability Fair value at December 31, 2017 992 1,774 Change in fair value 1,378 7,460 Exercise of common stock warrant — (9,234) Conversion to common stock warrant (2,370) — Fair value at September 30, 2018 $ — $ —

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	9 Months Ended
	Sep. 30, 2018
Table Text Blocks
Schedule of property and equipment, net	September 30, December 31, 2018 2017 Computer equipment $ 14,928 $ 12,349 Computer software 3,693 3,048 Leasehold improvements 6,870 6,327 Furniture and fixtures 3,751 2,870 Office equipment 20 99 Internal-use software 3,880 1,979 33,142 26,672 Less: Accumulated depreciation and amortization (18,350) (14,213) $ 14,792 $ 12,459

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2018
Table Text Blocks
Schedule of identifiable intangible assets	September 30, 2018 December 31, 2017 Gross Accumulated Carrying Gross Accumulated Carrying Amount Amortization Value Amount Amortization Value License agreement $ 150 $ (124) $ 26 $ 150 $ (113) $ 37 Developed technology 7,301 (4,440) 2,861 7,301 (3,344) 3,957 Trade name 440 (408) 32 440 (342) 98 Customer relationships 2,950 (2,950) — 2,950 (2,950) — $ 10,841 $ (7,922) $ 2,919 $ 10,841 $ (6,749) $ 4,092
Schedule of estimated future amortization expense of the identifiable intangible assets	Year Ending December 31, 2018 (remaining three months) $ 390 2019 1,130 2020 1,015 2021 384 $ 2,919

Preferred Stock (Tables)

Preferred Stock (Tables)	9 Months Ended
	Sep. 30, 2018
Table Text Blocks
Schedule of preferred stock	Preferred Preferred Common Stock Shares Shares Issued Carrying Liquidation Issuable Upon Authorized and Outstanding Value Preference Conversion Series A preferred stock 8,800,000 4,212,191 $ 1,721 $ (1) 1,709,063 Series B preferred stock 24,673,917 24,665,856 10,442 22,534 12,332,924 Series C preferred stock 13,283,366 10,105,400 9,540 11,447 5,052,697 Series D preferred stock 11,876,688 11,541,688 109,646 34,500 5,770,841 Series E preferred stock 12,219,202 12,219,202 116,082 48,999 6,109,588 Series E-1 preferred stock 6,415,146 4,739,463 45,025 3,991 2,369,729 Series F preferred stock 25,632,888 25,469,585 241,961 151,035 12,734,781 94,101,207 88,741,194 $ 532,696 $ 272,506 44,370,560 (1) The liquidation preference of the Series A preferred stock was calculated based on a percentage of the proceeds received by the Company in the event of a Deemed Liquidation Event. The holders of the Series A preferred stock did not have redemption rights other than in the event of a Deemed Liquidation Event.

Preferred Stock Warrants and _2

Preferred Stock Warrants and Common Stock Warrants (Tables)	9 Months Ended
	Sep. 30, 2018
Table Text Blocks
Summary of valuation assumptions used in determining fair value of common and preferred stock warrants	Issuance Date Underlying Security Exercise Number of Warrant Classification July 1, 2012 Common stock $ 485,985 (1) (1) Liability August 22, 2013 Series D preferred stock $ 10 years Liability June 27, 2014 Series D preferred stock $ 9.2 years Liability July 31, 2014 Common stock $ 10 years Equity (1) The number of shares of common stock issuable upon the exercise of the Company’s liability‑classified warrant to purchase common stock is calculated based on the number of shares of common stock equal to 12.5% of the sum of (a) the number of shares of common stock into which the outstanding shares of Series A preferred stock, including shares issuable upon the exercise of outstanding options to purchase shares of Series A preferred stock, convert upon an IPO and (b) the number of shares of common stock underlying the warrant. Such warrant is only exercisable upon the closing of an IPO of shares of the Company’s common stock. The warrant will expire, if not exercised, on the day immediately following the closing of an IPO of shares of the Company’s common stock.

Equity Award Plans (Tables)

Equity Award Plans (Tables)	9 Months Ended
	Sep. 30, 2018
Table Text Blocks
Schedule of Restricted Stock Unit ("RSU") activity	Weighted ‑ Weighted ‑ Average Average Remaining Aggregate Number of Grant Date Fair Contractual Term Intrinsic Shares Value Per Share (in years) Value Outstanding at December 31, 2017 — $ — — $ — Granted 502,221 10.99 Vested — Forfeited — Outstanding at September 30, 2018 502,221 1.47 $ 10,637 RSUs vested and expected to vest at September 30, 2018 452,399 1.38 $ 9,582 RSUs vested and exercisable at September 30, 2018 — —
Schedule of stock-based compensation expense	Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Cost of subscription, license and support revenue $ 156 $ 113 $ 429 $ 272 Cost of services revenue 82 56 212 167 Sales and marketing expense 1,541 805 3,705 2,422 Research and development expense 748 656 2,206 1,926 General and administrative expense 1,067 652 2,918 1,862 $ 3,594 $ 2,282 $ 9,470 $ 6,649
Series A convertible preferred stock
Table Text Blocks
Schedule of stock option activity	Weighted- Weighted- Average Remaining Aggregate Number of Average Contractual Term Intrinsic Shares Exercise Price (in years) Value Outstanding at December 31, 2017 4,689,576 $ 0.98 5.18 $ 10,539 Granted 195,312 3.60 Exercised (360,385) 0.59 Forfeited (351,562) 0.52 Converted to common stock options upon IPO (4,172,941) 1.18 Outstanding at September 30, 2018 —
Schedule of stock option assumptions	Nine Months Ended September 30, 2018 2017 Risk-free interest rate 2.74 % 2.17 % Expected term (in years) 6.25 6.25 Expected volatility 43.85 % 47.42 % Expected dividend yield — % — %
Common Stock
Table Text Blocks
Schedule of stock option activity	Weighted- Weighted- Average Remaining Aggregate Number of Average Contractual Term Intrinsic Shares Exercise Price (in years) Value Outstanding at December 31, 2017 14,183,221 $ 4.89 7.16 $ 17,626 Granted 3,267,775 13.54 Exercised (765,998) 4.10 Forfeited (707,256) 6.42 Series A options converted to common stock options upon IPO 1,693,197 2.90 Series E-1 options converted to common stock options upon IPO 837,835 0.86 Outstanding at September 30, 2018 18,508,774 $ 6.02 6.82 $ 282,233 Vested and expected to vest at September 30, 2018 17,895,791 $ 5.87 6.75 $ 275,452 Options exercisable at September 30, 2018 11,323,339 $ 3.96 5.63 $ 194,951
Schedule of stock option assumptions	Nine Months Ended September 30, 2018 2017 Risk-free interest rate 2.74-2.98 % 1.96-2.17 % Expected term (in years) 6.25 6.25 Expected volatility 43.29-43.85 % 45.85-47.42 % Expected dividend yield — % — %

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2018
Table Text Blocks
Summary of the future minimum lease payments due under operating leases	Year Ending December 31, 2018 (remaining three months) $ 1,275 2019 5,263 2020 5,107 2021 4,945 2022 2,164 Thereafter 1,843 $ 20,597
Summary of future minimum payments committed under hosting agreement	Year Ending December 31, 2018 (remaining three months) $ 5,611 2019 15,333 2020 10,667 $ 31,611

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2018
Table Text Blocks
Schedule of disaggregation of revenue	Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Subscription and support revenue $ 33,113 $ 29,567 $ 97,855 $ 85,567 Cloud-based subscription revenue 16,142 7,147 41,502 16,669 Perpetual license revenue 1,569 1,667 4,749 4,899 Services revenue 2,591 3,128 8,735 9,010 Total revenue $ 53,415 $ 41,509 $ 152,841 $ 116,145 Geographic revenue Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 United States $ 44,206 $ 35,439 $ 126,926 $ 100,605 All other 9,209 6,070 25,915 15,540 Total revenue $ 53,415 $ 41,509 $ 152,841 $ 116,145
Schedule of transaction price allocated to the remaining performance obligations	More than Total Less than 1 year 1-2 Years 2 years Deferred revenue 100 % 78 % 15 % 7 % Backlog 100 % 42 % 40 % 18 %

Net Loss per Share (Tables)

Net Loss per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Table Text Blocks
Schedule of basic and diluted net loss per share attributable to common stockholders	Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Numerator: Net loss $ (17,632) $ (13,599) $ (63,507) $ (38,373) Accretion of preferred stock to redemption value — (7,427) (199,492) (15,751) Net loss attributable to common stockholders $ (17,632) $ (21,026) $ (262,999) $ (54,124) Denominator: Weighted-average number of common shares outstanding—basic and diluted 67,837,240 10,587,153 41,494,203 10,263,962 Net loss per share attributable to common stockholders—basic and diluted $ (0.26) $ (1.99) $ (6.34) $ (5.27)
Schedule of potential common shares excluded from computation of diluted net loss per share	As of September 30, 2018 2017 Options to purchase common stock 18,508,774 14,541,159 Unvested restricted stock units 502,221 — Options to purchase Series E-1 preferred stock (as converted to common stock) — 837,835 Warrants to purchase common stock — 106,250 Warrants to purchase redeemable convertible preferred stock (as converted to common stock) — 167,500 Redeemable convertible preferred stock (as converted to common stock) — 44,370,560 19,010,995 60,023,304

Overview and Basis of Present_3

Overview and Basis of Presentation - Reverse Stock Split (Details)	Apr. 20, 2018
Reverse stock split
Reverse stock split ratio	0.50

Overview and Basis of Present_4

Overview and Basis of Presentation - Initial Public Offering - Sale of Stock (Details) - Initial Public Offering $ / shares in Units, $ in Millions	May 08, 2018USD ($)$ / sharesshares
Initial Public Offering
Issuance of common stock upon initial public offering, net of underwriting discounts and commissions and offering costs incurred (in shares) | shares	9,200,000
Share price (in dollars per share) | $ / shares	$ 19
Aggregate proceeds from IPO	$ 162.6
Offering costs	$ 4.9

Overview and Basis of Present_5

Overview and Basis of Presentation - Initial Public Offering - Conversion of Preferred Stock (Details)	May 08, 2018shares
Initial Public Offering
Common stock issued upon conversion of redeemable preferred stock (in shares)	46,079,623

Overview and Basis of Present_6

Overview and Basis of Presentation - Initial Public Offering - Warrants Exercised (Details)	May 08, 2018shares
Common stock warrants issued on July 1, 2012
Warrants
Common stock issued upon exercise of warrants (in shares)	485,985

New Accounting Pronouncements -

New Accounting Pronouncements - Impact of Recently Adopted Accounting Standards (Details)	9 Months Ended
	Sep. 30, 2018
Revenue recognition
Perpetual software licenses, estimated useful life	5 years
Customer relationship, commission costs amortization period	5 years

New Accounting Pronouncements_2

New Accounting Pronouncements - Select Unaudited Consolidated Balance Sheet Line Items (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets:
Deferred commissions, current portion	$ 11,801	$ 9,551
Deferred commissions, net of current portion	23,171	20,404
Liabilities, redeemable convertible and convertible preferred stock and stockholders' equity (deficit):
Deferred revenue, current portion	138,515	130,165
Deferred revenue, net of current portion	38,316	38,535
Accumulated deficit	$ (518,962)	(273,513)
Accounting Standards Update 2014-09 | Previously Reported
Assets:
Deferred commissions, current portion		15,195
Deferred commissions, net of current portion		3,811
Liabilities, redeemable convertible and convertible preferred stock and stockholders' equity (deficit):
Deferred revenue, current portion		132,278
Deferred revenue, net of current portion		31,902
Accumulated deficit		(279,942)
Accounting Standards Update 2014-09 | Restatement Adjustment
Assets:
Deferred commissions, current portion		(5,644)
Deferred commissions, net of current portion		16,593
Liabilities, redeemable convertible and convertible preferred stock and stockholders' equity (deficit):
Deferred revenue, current portion		(2,113)
Deferred revenue, net of current portion		6,633
Accumulated deficit		$ 6,429

New Accounting Pronouncements_3

New Accounting Pronouncements - Select Unaudited Consolidated Statement of Operations Line Items (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Revenue	$ 53,415	$ 41,509	$ 152,841	$ 116,145
Gross profit	41,510	31,724	119,617	90,368
Sales and marketing	35,818	25,988	101,657	75,078
Total operating expenses	59,570	45,380	174,690	128,932
Loss from operations	(18,060)	(13,656)	(55,073)	(38,564)
Loss before income taxes	(17,496)	(13,577)	(63,266)	(38,265)
Net loss	(17,632)	(13,599)	(63,507)	(38,373)
Comprehensive loss	(17,662)	(13,599)	(63,537)	(38,373)
Net loss attributable to common stockholders	$ (17,632)	$ (21,026)	$ (262,999)	$ (54,124)
Net loss per share attributable to common stockholders - basic and diluted	$ (0.26)	$ (1.99)	$ (6.34)	$ (5.27)
Subscription, License and Support
Revenue:
Revenue	$ 50,824	$ 38,381	$ 144,106	$ 107,135
Services
Revenue:
Revenue	$ 2,591	3,128	$ 8,735	9,010
Accounting Standards Update 2014-09 | Previously Reported
Revenue:
Revenue		41,379		117,200
Gross profit		31,594		91,423
Sales and marketing		26,905		77,929
Total operating expenses		46,297		131,783
Loss from operations		(14,703)		(40,360)
Loss before income taxes		(14,624)		(40,061)
Net loss		(14,646)		(40,169)
Net loss attributable to common stockholders		$ (22,073)		$ (55,920)
Net loss per share attributable to common stockholders - basic and diluted		$ (2.08)		$ (5.45)
Accounting Standards Update 2014-09 | Previously Reported | Subscription, License and Support
Revenue:
Revenue		$ 38,216		$ 107,783
Accounting Standards Update 2014-09 | Previously Reported | Services
Revenue:
Revenue		3,163		9,417
Accounting Standards Update 2014-09 | Restatement Adjustment
Revenue:
Revenue		130		(1,055)
Gross profit		130		(1,055)
Sales and marketing		(917)		(2,851)
Total operating expenses		(917)		(2,851)
Loss from operations		1,047		1,796
Loss before income taxes		1,047		1,796
Net loss		1,047		1,796
Net loss attributable to common stockholders		$ 1,047		$ 1,796
Net loss per share attributable to common stockholders - basic and diluted		$ 0.09		$ 0.17
Accounting Standards Update 2014-09 | Restatement Adjustment | Subscription, License and Support
Revenue:
Revenue		$ 165		$ (648)
Accounting Standards Update 2014-09 | Restatement Adjustment | Services
Revenue:
Revenue		$ (35)		$ (407)

New Accounting Pronouncements_4

New Accounting Pronouncements - Select Unaudited Consolidated Statement of Cash Flow Line Items (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net loss	$ (63,507)	$ (38,373)
Changes in operating assets and liabilities, excluding the impact of acquisition of businesses:
Deferred commissions	(5,017)	(4,122)
Deferred revenue	$ 8,131	23,711
Accounting Standards Update 2014-09 | Previously Reported
Cash flows from operating activities:
Net loss		(40,169)
Changes in operating assets and liabilities, excluding the impact of acquisition of businesses:
Deferred commissions		(1,272)
Deferred revenue		22,657
Accounting Standards Update 2014-09 | Restatement Adjustment
Cash flows from operating activities:
Net loss		1,796
Changes in operating assets and liabilities, excluding the impact of acquisition of businesses:
Deferred commissions		(2,850)
Deferred revenue		$ 1,054

Cash Equivalents and Short-te_2

Cash Equivalents and Short-term Investments - Cash Equivalents (Details) $ in Thousands	Sep. 30, 2018USD ($)
Cash equivalents
Cash equivalents:
Amortized Cost	$ 56,647
Fair Value	56,647
Money market funds
Cash equivalents:
Amortized Cost	56,647
Fair Value	$ 56,647

Cash Equivalents and Short-te_3

Cash Equivalents and Short-term Investments - Short-term Investments (Details) $ in Thousands	Sep. 30, 2018USD ($)
Short-term investments
Amortized Cost	$ 94,696
Unrealized Losses	(30)
Fair Value	94,666
Commercial paper
Short-term investments
Amortized Cost	46,710
Fair Value	46,710
U.S. treasury securities
Short-term investments
Amortized Cost	21,382
Unrealized Losses	(13)
Fair Value	21,369
Corporate bonds
Short-term investments
Amortized Cost	13,778
Unrealized Losses	(6)
Fair Value	13,772
Asset-backed securities
Short-term investments
Amortized Cost	12,826
Unrealized Losses	(11)
Fair Value	$ 12,815

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2018	May 08, 2018	Dec. 31, 2017
Assets:
Short-term investments	$ 94,666
Liabilities:
Warrant liability			$ 2,766
Commercial paper
Assets:
Short-term investments	46,710
U.S. treasury securities
Assets:
Short-term investments	21,369
Corporate bonds
Assets:
Short-term investments	13,772
Asset-backed securities
Assets:
Short-term investments	12,815
Series D preferred stock warrants
Liabilities:
Warrants, type			us-gaap:RedeemablePreferredStockMember
Common stock warrants
Liabilities:
Warrants, type		us-gaap:CommonStockMember	us-gaap:CommonStockMember
Cash equivalents
Assets:
Cash equivalents	56,647
Money market funds
Assets:
Cash equivalents	56,647
Recurring basis
Assets:
Short-term investments	94,666
Liabilities:
Fair value of liabilities			$ 2,766
Recurring basis | Commercial paper
Assets:
Short-term investments	46,710
Recurring basis | U.S. treasury securities
Assets:
Short-term investments	21,369
Recurring basis | Corporate bonds
Assets:
Short-term investments	13,772
Recurring basis | Asset-backed securities
Assets:
Short-term investments	12,815
Recurring basis | Series D preferred stock warrants
Liabilities:
Warrant liability			992
Recurring basis | Common stock warrants
Liabilities:
Warrant liability			1,774
Recurring basis | Cash equivalents
Assets:
Cash equivalents	56,647		21,597
Recurring basis | Money market funds
Assets:
Cash equivalents	56,647		21,597
Recurring basis | Level 1
Assets:
Short-term investments	21,369
Recurring basis | Level 1 | U.S. treasury securities
Assets:
Short-term investments	21,369
Recurring basis | Level 1 | Cash equivalents
Assets:
Cash equivalents	56,647		21,597
Recurring basis | Level 1 | Money market funds
Assets:
Cash equivalents	56,647		21,597
Recurring basis | Level 2
Assets:
Short-term investments	73,297
Recurring basis | Level 2 | Commercial paper
Assets:
Short-term investments	46,710
Recurring basis | Level 2 | Corporate bonds
Assets:
Short-term investments	13,772
Recurring basis | Level 2 | Asset-backed securities
Assets:
Short-term investments	$ 12,815
Recurring basis | Level 3
Liabilities:
Fair value of liabilities			2,766
Recurring basis | Level 3 | Series D preferred stock warrants
Liabilities:
Warrant liability			992
Recurring basis | Level 3 | Common stock warrants
Liabilities:
Warrant liability			$ 1,774

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Level 3 Roll Forward (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Series D preferred stock warrants
Fair values of preferred stock warrant liabilities and common stock warrant liability
Beginning Balance	$ 992
Change in fair value	1,378
Exercise of common stock warrants / Conversion to common stock warrants	(2,370)
Ending Balance	0
Common stock warrants
Fair values of preferred stock warrant liabilities and common stock warrant liability
Beginning Balance	1,774
Change in fair value	7,460
Exercise of common stock warrants / Conversion to common stock warrants	(9,234)
Ending Balance	$ 0

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Warrants Exercised (Details)	May 08, 2018shares
Common stock warrants issued on July 1, 2012
Warrants
Common stock issued upon exercise of warrants (in shares)	485,985

Fair Value of Financial Instr_6

Fair Value of Financial Instruments - Valuation Assumptions (Details) - Common stock warrants - $ / shares	May 08, 2018	Dec. 31, 2017
Valuation assumptions
Warrants, type	us-gaap:CommonStockMember	us-gaap:CommonStockMember
Valuation technique	us-gaap:ValuationTechniqueOptionPricingModelMember
Measurement Input, Share Price
Valuation assumptions
Measurement input	19

Property and Equipment, Net - T

Property and Equipment, Net - Tabular Disclosure (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property and equipment, net
Property and equipment, gross	$ 33,142	$ 26,672
Less: Accumulated depreciation and amortization	(18,350)	(14,213)
Property and equipment, net	14,792	12,459
Computer equipment
Property and equipment, net
Property and equipment, gross	14,928	12,349
Computer software
Property and equipment, net
Property and equipment, gross	3,693	3,048
Leasehold improvements
Property and equipment, net
Property and equipment, gross	6,870	6,327
Furniture and fixtures
Property and equipment, net
Property and equipment, gross	3,751	2,870
Office equipment
Property and equipment, net
Property and equipment, gross	20	99
Internal-use software
Property and equipment, net
Property and equipment, gross	$ 3,880	$ 1,979

Property and Equipment, Net - D

Property and Equipment, Net - Depreciation and Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Depreciation and amortization expense
Depreciation and amortization expense related to property and equipment, including internal-use software	$ 1,615	$ 1,417	$ 4,708	$ 4,031

Property and Equipment, Net -_2

Property and Equipment, Net - Disposals (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Property and equipment, net
Disposed of fully depreciated assets with an original cost	$ 57	$ 0	$ 57	$ 0

Property and Equipment, Net - C

Property and Equipment, Net - Capitalized Internal-use Software (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Capitalized internal-use software
Internal-use software capitalized	$ 910	$ 237	$ 1,901	$ 714
Capitalized internal-use software, amortization expense	$ 115	$ 117	$ 405	$ 302

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Goodwill
Goodwill	$ 119,656	$ 119,656

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Intangible Assets
Gross Amount	$ 10,841	$ 10,841
Accumulated Amortization	(7,922)	(6,749)
Carrying Value	2,919	4,092
License Agreement
Intangible Assets
Gross Amount	150	150
Accumulated Amortization	(124)	(113)
Carrying Value	26	37
Developed Technology
Intangible Assets
Gross Amount	7,301	7,301
Accumulated Amortization	(4,440)	(3,344)
Carrying Value	2,861	3,957
Trade Name
Intangible Assets
Gross Amount	440	440
Accumulated Amortization	(408)	(342)
Carrying Value	32	98
Customer Relationships
Intangible Assets
Gross Amount	2,950	2,950
Accumulated Amortization	$ (2,950)	$ (2,950)

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Intangible Assets
Amortization expense	$ 391	$ 391	$ 1,173	$ 1,173

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Estimated future amortization expense
2018 (remaining three months)	$ 390
2,019	1,130
2,020	1,015
2,021	384
Carrying Value	$ 2,919	$ 4,092

Debt (Details)

Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt
Line of credit	$ 0	$ 0

Preferred Stock - General Infor

Preferred Stock - General Information (Details)	Sep. 30, 2018$ / sharesshares
Convertible preferred stock
Convertible preferred stock, shares authorized (in shares)	25,000,000
Convertible preferred stock, par value (in dollars per share) | $ / shares	$ 0.001
Convertible preferred stock, shares issued (in shares)	0
Convertible preferred stock, shares outstanding (in shares)	0

Preferred Stock - Options Exerc

Preferred Stock - Options Exercised (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Preferred stock
Cash proceeds from exercise of stock options	$ 3,348	$ 2,349
Series A convertible preferred stock
Preferred stock
Exercise of stock options (in shares)	360,385
Cash proceeds from exercise of stock options	$ 211

Preferred Stock - Adjustment to

Preferred Stock - Adjustment to the Carrying Value Redeemable Convertible Preferred Stock (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Preferred stock
Accretion of preferred stock to redemption value	$ 7,427	$ 199,492	$ 15,751

Preferred Stock - Liquidation P

Preferred Stock - Liquidation Preference (Details) - USD ($) $ in Thousands	May 07, 2018	Dec. 31, 2017
Redeemable convertible preferred stock
Convertible preferred stock
Liquidation Preference	$ 272,506	$ 272,506

Preferred Stock - Tabular Discl

Preferred Stock - Tabular Disclosure (Details) - USD ($) $ in Thousands	Sep. 30, 2018	May 07, 2018	Dec. 31, 2017
Convertible preferred stock
Convertible preferred stock, shares authorized (in shares)	25,000,000
Convertible preferred stock, shares issued (in shares)	0
Convertible preferred stock, shares outstanding (in shares)	0
Series A convertible preferred stock
Convertible preferred stock
Convertible preferred stock, shares authorized (in shares)	0	8,800,000	8,800,000
Convertible preferred stock, shares issued (in shares)	0	4,212,191	3,851,806
Convertible preferred stock, shares outstanding (in shares)	0	4,212,191	3,851,806
Convertible preferred stock		$ 1,721	$ 1,510
Convertible preferred stock, common stock issuable upon conversion (in shares)		1,709,063
Redeemable convertible preferred stock
Convertible preferred stock
Convertible preferred stock, shares authorized (in shares)	0	94,101,207	94,101,207
Convertible preferred stock, shares issued (in shares)	0	88,741,194	88,741,194
Convertible preferred stock, shares outstanding (in shares)	0	88,741,194	88,741,194
Convertible preferred stock		$ 532,696	$ 333,204
Convertible preferred stock, liquidation preference, value		$ 272,506	$ 272,506
Convertible preferred stock, common stock issuable upon conversion (in shares)		44,370,560
Redeemable convertible preferred stock, Series B
Convertible preferred stock
Convertible preferred stock, shares authorized (in shares)		24,673,917
Convertible preferred stock, shares issued (in shares)		24,665,856
Convertible preferred stock, shares outstanding (in shares)		24,665,856
Convertible preferred stock		$ 10,442
Convertible preferred stock, liquidation preference, value		$ 22,534
Convertible preferred stock, common stock issuable upon conversion (in shares)		12,332,924
Redeemable convertible preferred stock, Series C
Convertible preferred stock
Convertible preferred stock, shares authorized (in shares)		13,283,366
Convertible preferred stock, shares issued (in shares)		10,105,400
Convertible preferred stock, shares outstanding (in shares)		10,105,400
Convertible preferred stock		$ 9,540
Convertible preferred stock, liquidation preference, value		$ 11,447
Convertible preferred stock, common stock issuable upon conversion (in shares)		5,052,697
Redeemable convertible preferred stock, Series D
Convertible preferred stock
Convertible preferred stock, shares authorized (in shares)		11,876,688
Convertible preferred stock, shares issued (in shares)		11,541,688
Convertible preferred stock, shares outstanding (in shares)		11,541,688
Convertible preferred stock		$ 109,646
Convertible preferred stock, liquidation preference, value		$ 34,500
Convertible preferred stock, common stock issuable upon conversion (in shares)		5,770,841
Redeemable convertible preferred stock, Series E
Convertible preferred stock
Convertible preferred stock, shares authorized (in shares)		12,219,202
Convertible preferred stock, shares issued (in shares)		12,219,202
Convertible preferred stock, shares outstanding (in shares)		12,219,202
Convertible preferred stock		$ 116,082
Convertible preferred stock, liquidation preference, value		$ 48,999
Convertible preferred stock, common stock issuable upon conversion (in shares)		6,109,588
Redeemable convertible preferred stock, Series E-1
Convertible preferred stock
Convertible preferred stock, shares authorized (in shares)		6,415,146
Convertible preferred stock, shares issued (in shares)		4,739,463
Convertible preferred stock, shares outstanding (in shares)		4,739,463
Convertible preferred stock		$ 45,025
Convertible preferred stock, liquidation preference, value		$ 3,991
Convertible preferred stock, common stock issuable upon conversion (in shares)		2,369,729
Redeemable convertible preferred stock, Series F
Convertible preferred stock
Convertible preferred stock, shares authorized (in shares)		25,632,888
Convertible preferred stock, shares issued (in shares)		25,469,585
Convertible preferred stock, shares outstanding (in shares)		25,469,585
Convertible preferred stock		$ 241,961
Convertible preferred stock, liquidation preference, value		$ 151,035
Convertible preferred stock, common stock issuable upon conversion (in shares)		12,734,781

Preferred Stock Warrants and _3

Preferred Stock Warrants and Common Stock Warrants - Warrants Outstanding - Tabular Disclosure (Details) - $ / shares	May 07, 2018	Jun. 30, 2018	May 08, 2018
Series D preferred stock warrants issued on August 22, 2013
Warrants
Exercise price (in dollars per share)	$ 2.9891
Number of shares issuable upon exercise (in shares)	167,500
Warrant contractual term	10 years
Series D preferred stock warrants issued on June 27, 2014
Warrants
Exercise price (in dollars per share)	$ 2.9891
Number of shares issuable upon exercise (in shares)	167,500
Warrant contractual term	9 years 2 months 12 days
Common stock warrants issued on July 1, 2012
Warrants
Exercise price (in dollars per share)	$ 0.002		$ 0.002
Number of shares issuable upon exercise (in shares)	485,985
Common stock warrants issued on July 31, 2014, expiring July 2024
Warrants
Exercise price (in dollars per share)	$ 3.02	$ 3.02
Number of shares issuable upon exercise (in shares)	106,250
Warrant contractual term	10 years

Preferred Stock Warrants and _4

Preferred Stock Warrants and Common Stock Warrants - Warrants Outstanding - Additional Information (Details)	May 07, 2018
Common stock warrants issued on July 1, 2012
Class of Warrant or Right [Line Items]
Shares issuable percentage (as a percent)	12.50%

Preferred Stock Warrants and _5

Preferred Stock Warrants and Common Stock Warrants - Warrants Exercised (Details) - $ / shares	May 08, 2018	Jun. 30, 2018	May 07, 2018
Common stock warrants issued on July 1, 2012
Warrants
Exercise price (in dollars per share)	$ 0.002		$ 0.002
Stock issued upon exercise of warrants (in shares)	485,985
Common stock warrants issued on July 31, 2014, expiring July 2024
Warrants
Exercise price (in dollars per share)		$ 3.02	$ 3.02
Stock issued upon exercise of warrants (in shares)		95,113
Common stock warrants converted from Series D preferred stock warrants issued upon closing of initial public offering
Warrants
Exercise price (in dollars per share)		$ 2.9891
Stock issued upon exercise of warrants (in shares)		130,965

Preferred Stock Warrants and _6

Preferred Stock Warrants and Common Stock Warrants - General Information (Details)	Sep. 30, 2018shares
Redeemable convertible preferred stock warrants
Warrants
Warrants outstanding (in shares)	0
Common stock warrants
Warrants
Warrants outstanding (in shares)	0

Equity Award Plans - Options to

Equity Award Plans - Options to Purchase Series A Preferred Stock - Activity (Details) - Series A convertible preferred stock - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Number of Shares
Beginning balance (in shares)	4,689,576
Granted (in shares)	195,312
Exercised (in shares)	(360,385)
Forfeited (in shares)	(351,562)
Converted to common stock options upon IPO (in shares)	(4,172,941)
Ending balance (in shares)	0	4,689,576
Weighted-Average Exercise Price
Beginning balance (in dollars per share)	$ 0.98
Granted (in dollars per share)	3.60
Exercised (in dollars per share)	0.59
Forfeited (in dollars per share)	0.52
Converted to common stock options upon IPO (in dollars per share)	1.18
Ending balance (in dollars per share)	$ 0	$ 0.98
Vested and expected to vest
Weighted-Average Remaining Contractual Term - Vested and expected to vest (in years)		5 years 2 months 5 days
Additional disclosures
Aggregate Intrinsic Value - Options, balance		$ 10,539

Equity Award Plans - Options _2

Equity Award Plans - Options to Purchase Series A Preferred Stock - Fair Value Assumptions (Details) - Series A convertible preferred stock - Stock Options	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Fair value assumptions
Risk-free interest rate (as a percent)	2.74%	2.17%
Expected term (in years)	6 years 3 months	6 years 3 months
Expected volatility (as a percent)	43.85%	47.42%
Expected dividend yield (as a percent)	0.00%	0.00%

Equity Award Plans - Options _3

Equity Award Plans - Options to Purchase Common Stock - Activity (Details) - Common Stock - USD ($) $ / shares in Units, $ in Thousands	May 08, 2018	Sep. 30, 2018	Dec. 31, 2017
Number of Shares
Beginning balance (in shares)		14,183,221
Granted (in shares)		3,267,775
Exercised (in shares)		(765,998)
Forfeited (in shares)		(707,256)
Series A options converted to common stock options upon IPO (in shares)		1,693,197
Series E-1 options converted to common stock options upon IPO (in shares)	837,835	837,835
Ending balance (in shares)		18,508,774	14,183,221
Weighted-Average Exercise Price
Beginning balance (in dollars per share)		$ 4.89
Granted (in dollars per share)		13.54
Exercised (in dollars per share)		4.10
Forfeited (in dollars per share)		6.42
Series A options converted to common stock options upon IPO (in dollars per share)		2.90
Series E-1 options converted to common stock options upon IPO (in dollars per share)		0.86
Ending balance (in dollars per share)		$ 6.02	$ 4.89
Vested and expected to vest
Number of Shares - Vested and expected to vest (in shares)		17,895,791
Weighted-Average Exercise Price - Vested and expected to vest (in dollars per share)		$ 5.87
Weighted-Average Remaining Contractual Term - Vested and expected to vest (in years)		6 years 9 months
Aggregate Intrinsic Value - Vested and expected to vest		$ 275,452
Additional disclosures
Weighted-Average Remaining Contractual Term - Options, balance (in years)		6 years 9 months 26 days	7 years 1 month 28 days
Aggregate Intrinsic Value - Options, balance		$ 282,233	$ 17,626
Number of Shares - Options vested and exercisable (in shares)		11,323,339
Weighted-Average Exercise Price - Options vested and exercisable (in dollars per share)		$ 3.96
Weighted-Average Remaining Contractual Term - Options vested and exercisable (in years)		5 years 7 months 17 days
Aggregate Intrinsic Value - Options vested and exercisable		$ 194,951

Equity Award Plans - Series E-1

Equity Award Plans - Series E-1 Preferred Stock Options (Details) - shares	May 08, 2018	Sep. 30, 2018
Common Stock
Additional disclosures
Series E-1 options converted to common stock options upon IPO (in shares)	837,835	837,835
Redeemable convertible preferred stock, Series E-1
Additional disclosures
Converted to common stock options upon IPO (in shares)	837,835

Equity Award Plans - Options _4

Equity Award Plans - Options to Purchase Common Stock - Fair Value Assumptions (Details) - Common Stock - Stock Options	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Fair value assumptions
Risk-free interest rate, minimum (as a percent)	2.74%	1.96%
Risk-free interest rate, maximum (as a percent)	2.98%	2.17%
Expected term (in years)	6 years 3 months	6 years 3 months
Expected volatility, minimum (as a percent)	43.29%	45.85%
Expected volatility, maximum (as a percent)	43.85%	47.42%
Expected dividend yield (as a percent)	0.00%	0.00%

Equity Award Plans - Restricted

Equity Award Plans - Restricted Stock Units - Activity (Details) - RSUs $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)$ / sharesshares
Number of Shares
Beginning balance (in shares)	0
Granted (in shares)	502,221
Ending balance (in shares)	502,221
Weighted-Average Grant Date Fair Value Per Share
Beginning balance (in dollars per share) | $ / shares	$ 0
Granted (in dollars per share) | $ / shares	10.99
Ending balance (in dollars per share) | $ / shares	$ 0
Additional disclosures
Weighted-Average Remaining Contractual Term - Balance (in years)	1 year 5 months 19 days
Number of Shares - Vested and expected to vest (in shares)	452,399
Weighted-Average Remaining Contractual Term - Vested and expected to vest (in years)	1 year 4 months 17 days
Aggregate Intrinsic Value
Balance | $	$ 10,637
Vested and expected to vest | $	$ 9,582

Equity Award Plans - Stock-Base

Equity Award Plans - Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Stock-Based Compensation
Stock-based compensation expense	$ 3,594	$ 2,282	$ 9,470	$ 6,649
Sales and marketing expense
Stock-Based Compensation
Stock-based compensation expense	1,541	805	3,705	2,422
Research and development expense
Stock-Based Compensation
Stock-based compensation expense	748	656	2,206	1,926
General and administrative expense
Stock-Based Compensation
Stock-based compensation expense	1,067	652	2,918	1,862
Subscription, License and Support | Cost of revenue
Stock-Based Compensation
Stock-based compensation expense	156	113	429	272
Services | Cost of revenue
Stock-Based Compensation
Stock-based compensation expense	$ 82	$ 56	$ 212	$ 167

Equity Award Plans - Unrecogniz

Equity Award Plans - Unrecognized Compensation Cost (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Stock Options
Unrecognized compensation cost
Unrecognized compensation cost, options	$ 32,344
Weighted-average period for unrecognized compensation cost	2 years 6 months 15 days
RSUs
Unrecognized compensation cost
Unrecognized compensation cost, RSUs	$ 4,427
Weighted-average period for unrecognized compensation cost	2 years 11 months 16 days

Equity Award Plans - 2018 Stock

Equity Award Plans - 2018 Stock Option and Incentive Plan (Details) - 2018 Plan	Apr. 17, 2018shares
Share-based compensation
Number of shares available for future issuance (in shares)	6,075,051
Percentage of increase in number of shares of common stock outstanding (as a percent)	5.00%

Equity Award Plans - 2018 Emplo

Equity Award Plans - 2018 Employee Stock Purchase Plan (Details) - Employee Stock Purchase Plan	Apr. 17, 2018shares
Share-based compensation
Number of shares available for future issuance (in shares)	1,735,729
Percentage of increase in number of shares of common stock outstanding (as a percent)	1.00%

Commitments and Contingencies -

Commitments and Contingencies - Rent Expense (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating leases
Rent expense	$ 3,353	$ 2,615

Commitments and Contingencies_2

Commitments and Contingencies - Future Minimum Lease Payments (Details) $ in Thousands	Sep. 30, 2018USD ($)
Future minimum lease payments due under operating leases
2018 (remaining three months)	$ 1,275
2,019	5,263
2,020	5,107
2,021	4,945
2,022	2,164
Thereafter	1,843
Total	$ 20,597

Commitments and Contingencies_3

Commitments and Contingencies - Hosting Services Agreement (Details) $ in Thousands	Sep. 30, 2018USD ($)
Future minimum payments committed under the hosting agreement
2018 (remaining three months)	$ 5,611
2,019	15,333
2,020	10,667
Total	$ 31,611

Commitments and Contingencies_4

Commitments and Contingencies - Indemnifications (Details) - Indemnifications	9 Months Ended
	Sep. 30, 2018claim
Indemnifications
Number of claims pending	0
Number of new claims	0

Commitments and Contingencies_5

Commitments and Contingencies - Litigation (Details) - Settled litigation - Finjan, Inc. patent infringement $ in Thousands	Mar. 21, 2018patent	Sep. 30, 2018USD ($)	Apr. 30, 2018USD ($)	Mar. 31, 2018USD ($)
Patents
Number of patents seeking judgment the Company infringed asserted patents	4
Number of patents seeking preliminary and permanent injunction against the Company preventing continued infringement	1
Accrual
Accrued liability | $				$ 3,900
Payment
Payment of settlement amount | $		$ 1,300	$ 1,300
Minimum
Patents
Number of patents allegedly infringed	4

Income Taxes - Provision (Detai

Income Taxes - Provision (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Taxes
Provision for income taxes	$ 136	$ 22	$ 241	$ 108

Income Taxes - Tax Rate (Detail

Income Taxes - Tax Rate (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Income Taxes
U.S. federal corporate tax rate (as a percent)	21.00%	35.00%

Revenue - Subscription, License

Revenue - Subscription, License and Support Revenue (Details)	9 Months Ended
	Sep. 30, 2018
Revenue recognition
Perpetual software licenses, estimated useful life	5 years

Revenue - Contract Costs (Detai

Revenue - Contract Costs (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Revenue recognition
Customer relationship, commission costs amortization period	5 years
Practical expedient
Revenue, Practical Expedient, Incremental Cost of Obtaining Contract	true
Deferred commissions
Deferred commissions	$ 34,972	$ 25,815	$ 29,955	$ 21,693
Commission costs capitalized	14,253	11,230
Amortization of deferred commissions	$ 9,236	$ 7,108

Revenue - Deferred Revenue (Det

Revenue - Deferred Revenue (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Deferred revenue
Revenue recognized	$ 110,482

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue - Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Revenue	$ 53,415	$ 41,509	$ 152,841	$ 116,145
Subscription, License and Support
Revenue:
Revenue	50,824	38,381	144,106	107,135
Subscription and support
Revenue:
Revenue	33,113	29,567	97,855	85,567
Cloud-based subscription
Revenue:
Revenue	16,142	7,147	41,502	16,669
Perpetual license
Revenue:
Revenue	1,569	1,667	4,749	4,899
Services
Revenue:
Revenue	$ 2,591	$ 3,128	$ 8,735	$ 9,010

Revenue - Disaggregation of R_2

Revenue - Disaggregation of Revenue - Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Revenue	$ 53,415	$ 41,509	$ 152,841	$ 116,145
United States
Revenue:
Revenue	44,206	35,439	126,926	100,605
All other countries
Revenue:
Revenue	$ 9,209	$ 6,070	$ 25,915	$ 15,540

Revenue - Performance Obligatio

Revenue - Performance Obligations - General Information (Details) $ in Thousands	Sep. 30, 2018USD ($)
Customers, Contracted Revenue, Deferred Revenue
Remaining performance obligations
Remaining performance obligation	$ 176,831
Customers, Contracted Revenue, Backlog
Remaining performance obligations
Remaining performance obligation	$ 38,660

Revenue - Performance Obligat_2

Revenue - Performance Obligations - Tabular Disclosure (Details)	Sep. 30, 2018
Customers, Contracted Revenue, Deferred Revenue
Remaining performance obligations
Remaining performance obligation (as a percent)	100.00%
Customers, Contracted Revenue, Deferred Revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Remaining performance obligations
Remaining performance obligation (as a percent)	78.00%
Remaining performance obligation, expected timing of satisfaction, period	3 months
Customers, Contracted Revenue, Deferred Revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Remaining performance obligations
Remaining performance obligation (as a percent)	15.00%
Remaining performance obligation, expected timing of satisfaction, period	12 months
Customers, Contracted Revenue, Deferred Revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Remaining performance obligations
Remaining performance obligation (as a percent)	7.00%
Remaining performance obligation, expected timing of satisfaction, period
Customers, Contracted Revenue, Backlog
Remaining performance obligations
Remaining performance obligation (as a percent)	100.00%
Customers, Contracted Revenue, Backlog | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Remaining performance obligations
Remaining performance obligation (as a percent)	42.00%
Remaining performance obligation, expected timing of satisfaction, period	3 months
Customers, Contracted Revenue, Backlog | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Remaining performance obligations
Remaining performance obligation (as a percent)	40.00%
Remaining performance obligation, expected timing of satisfaction, period	12 months
Customers, Contracted Revenue, Backlog | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Remaining performance obligations
Remaining performance obligation (as a percent)	18.00%
Remaining performance obligation, expected timing of satisfaction, period

Revenue - Concentrations of Ris

Revenue - Concentrations of Risk - Accounts Receivable (Details) - Accounts Receivable - Credit Concentration Risk	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Channel Partner, One
Accounts receivable, net
Concentration risk (as a percent)	26.20%	20.20%
Channel Partner, Two
Accounts receivable, net
Concentration risk (as a percent)	12.30%	16.20%

Revenue - Concentrations of R_2

Revenue - Concentrations of Risk - Revenue (Details) - Customer Concentration Risk - Sales Revenue, Services, Net	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Concentration risk (as a percent)		26.00%		26.60%
Channel Partner, One
Revenue:
Concentration risk (as a percent)	19.90%		21.20%
Channel Partner, Two
Revenue:
Concentration risk (as a percent)	20.10%		18.50%

Net Loss per Share - Basic and

Net Loss per Share - Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net loss	$ (17,632)	$ (13,599)	$ (63,507)	$ (38,373)
Accretion of preferred stock to redemption value		(7,427)	(199,492)	(15,751)
Net loss attributable to common stockholders	$ (17,632)	$ (21,026)	$ (262,999)	$ (54,124)
Denominator:
Weighted-average common shares outstanding - basic and diluted	67,837,240	10,587,153	41,494,203	10,263,962
Net loss per share attributable to common stockholders - basic and diluted	$ (0.26)	$ (1.99)	$ (6.34)	$ (5.27)

Net Loss per Share - Anti-dilut

Net Loss per Share - Anti-dilutive Securities (Details) - shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Anti-dilutive securities
Potential common shares excluded from computation of diluted net loss per share (in shares)	19,010,995	60,023,304
Employee and Non-Employee Stock Options
Anti-dilutive securities
Potential common shares excluded from computation of diluted net loss per share (in shares)	18,508,774	14,541,159
RSUs
Anti-dilutive securities
Potential common shares excluded from computation of diluted net loss per share (in shares)	502,221
Options to Purchase Series E-1 Preferred Stock [Member]
Anti-dilutive securities
Potential common shares excluded from computation of diluted net loss per share (in shares)		837,835
Common stock warrants
Anti-dilutive securities
Potential common shares excluded from computation of diluted net loss per share (in shares)		106,250
Redeemable convertible preferred stock warrants
Anti-dilutive securities
Potential common shares excluded from computation of diluted net loss per share (in shares)		167,500
Redeemable convertible preferred stock
Anti-dilutive securities
Potential common shares excluded from computation of diluted net loss per share (in shares)		44,370,560