Apptio 10-Q 31 Oct 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 26, 2017
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	APTI
Entity Registrant Name	Apptio Inc
Entity Central Index Key	1,419,625
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Class A Common Stock
Entity Common Stock, Shares Outstanding		23,087,064
Class B Common Stock
Entity Common Stock, Shares Outstanding		17,301,431

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 29,279	$ 42,007
Short-term investments	106,249	36,741
Accounts receivable, net of allowance for doubtful accounts of $305 and $122	46,136	58,587
Prepaid expenses and other current assets	5,530	5,440
Total current assets	187,194	142,775
Long-term assets
Property and equipment, net of accumulated depreciation of $20,982 and $17,091	11,168	12,827
Long-term investments		38,446
Other long-term assets	944	734
Total assets	199,306	194,782
Current liabilities
Accounts payable	3,995	3,574
Accrued payroll and other expenses	14,568	14,073
Deferred revenue	96,609	97,885
Deferred rent	868	799
Capital leases	27	43
Total current liabilities	116,067	116,374
Long-term liabilities
Deferred revenue, net of current portion	3,602	2,254
Deferred rent, net of current portion	3,709	4,360
Capital leases, net of current portion	31	51
Asset retirement obligation	194	175
Total liabilities	123,603	123,214
Commitments and contingencies (Note 8)
Stockholders’ equity
Class A and Class B Common stock	4	4
Additional paid-in capital	294,848	271,982
Accumulated other comprehensive loss	(94)	(94)
Accumulated deficit	(219,055)	(200,324)
Total stockholders’ equity	75,703	71,568
Total liabilities and stockholders' equity	$ 199,306	$ 194,782

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 305	$ 122
Accumulated depreciation	$ 20,982	$ 17,091

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue
Subscription	$ 39,426	$ 33,314	$ 112,860	$ 94,995
Professional services	7,570	7,313	23,292	21,254
Total revenue	46,996	40,627	136,152	116,249
Cost of revenue
Subscription	7,167	6,921	22,269	19,960
Professional services	6,763	7,068	21,599	19,780
Total cost of revenue	13,930	13,989	43,868	39,740
Gross profit	33,066	26,638	92,284	76,509
Operating expenses
Research and development	10,139	9,015	30,060	26,072
Sales and marketing	20,863	18,300	60,983	54,256
General and administrative	7,188	6,285	20,342	16,969
Total operating expenses	38,190	33,600	111,385	97,297
Loss from operations	(5,124)	(6,962)	(19,101)	(20,788)
Other income (expense)
Interest income (expense) and other, net	311	(1,312)	811	(1,746)
Foreign exchange gain (loss)	105	(367)	173	(774)
Loss before provision for income taxes	(4,708)	(8,641)	(18,117)	(23,308)
Provision for income taxes	(463)	(114)	(614)	(328)
Net loss	$ (5,171)	$ (8,755)	$ (18,731)	$ (23,636)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.13)	$ (0.63)	$ (0.48)	$ (1.78)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted	40,120	13,884	39,240	13,307

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (5,171)	$ (8,755)	$ (18,731)	$ (23,636)
Other comprehensive loss
Unrealized gain (loss) on available-for-sale securities	53	(3)		(3)
Total comprehensive loss	$ (5,118)	$ (8,758)	$ (18,731)	$ (23,639)

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net loss	$ (18,731)	$ (23,636)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities
Depreciation and amortization	4,657	4,487
Amortization of premiums on investments	59	20
Loss on disposal of property and equipment	7	26
Stock-based compensation	11,667	6,902
Accretion of capitalized loan fees	18	127
Loss on extinguishment of debt		722
Remeasurement of preferred stock warrant liability		202
Foreign exchange gain	(173)
Change in operating assets and liabilities
Accounts receivable	12,026	10,302
Prepaid expenses and other assets	3,260	(660)
Accounts payable	635	1,648
Accrued expenses	(2,025)	(2,442)
Deferred revenue	72	535
Deferred rent	(596)	(421)
Net cash provided by (used in) operating activities	10,876	(2,188)
Cash flows from investing activities
Purchases of property and equipment	(2,837)	(3,518)
Proceeds from sales of equipment	11
Proceeds from maturities of investments	35,075	6,245
Purchases of investments	(66,196)	(10,826)
Payments for security deposits	(23)	(43)
Net cash used in investing activities	(33,970)	(8,142)
Cash flows from financing activities
Proceeds from exercises of common stock options	8,948	1,000
Proceeds from purchases of stock under employee stock purchase plan	2,251
Proceeds from initial public offering, net of underwriting discounts		102,672
Payment of initial public offering costs	(243)	(574)
Proceeds from long-term debt		20,000
Principal payments on long-term debt		(20,000)
Payment of debt prepayment fees		(200)
Principal payments on capital lease obligations	(32)	(33)
Payment of capitalized loan fees		(248)
Net cash provided by financing activities	10,924	102,617
Foreign currency effect on cash, cash equivalents and restricted cash	(558)	(331)
Net (decrease) increase in cash, cash equivalents and restricted cash	(12,728)	91,956
Cash, cash equivalents and restricted cash
Beginning of period	42,007	19,756
End of period	$ 29,279	$ 111,712

Description of Operations and S

Description of Operations and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2017
Description Of Operations And Summary Of Significant Accounting Policies [Abstract]
Description of Operations and Summary of Significant Accounting Policies	Note 1. Description of Operations and Summary of Significant Accounting Policies Operations Apptio, Inc., or the Company, was incorporated on October 2, 2007 and is headquartered in Bellevue, Washington. The Company develops and sells Technology Business Management, or TBM, solutions. The Company’s cloud-based platform and SaaS applications enable IT leaders to analyze, optimize and plan technology investments, and benchmark their financial and operational performance against peers. The Company operates primarily in North America, Europe and Australia. Initial Public Offering In September 2016, the Company completed an initial public offering, or IPO, in which the Company sold 6,900,000 shares of its newly-authorized Class A common stock at the initial price to public of $16.00 per share. The Company received net proceeds of $99.0 million, after deducting underwriting discounts and commissions and offering expenses, from sales of its shares in the IPO. Immediately prior to the completion of the IPO, (1) all shares of common stock then outstanding were converted to Class B common stock on a one-for-one basis, (2) common stock warrants then outstanding were converted to warrants to purchase 47,893 shares of Class B common stock on a one-for-one basis, (3) a warrant to purchase 27,321 shares of convertible preferred stock was converted to a warrant to purchase 27,321 shares of Class B common stock, and (4) all shares of convertible preferred stock then outstanding were converted into 18,239,475 shares of the Company’s common stock on a one-for-one basis, and then reclassified as shares of Class B common stock. See Note 4 for further discussion of Class A and B common stock. Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America, or GAAP, and applicable rules and regulations of the Securities and Exchange Commission, or SEC, regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016 filed with the SEC on February 17, 2017, or Form 10-K. The condensed consolidated balance sheet as of December 31, 2016, included herein, was derived from the audited annual financial statements as of that date, but does not include all disclosures including certain notes required by GAAP on an annual reporting basis. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to fairly state the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2017 or any future period. Principles of Consolidation The condensed consolidated financial statements include the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ materially from those estimates. Certain Significant Risks and Uncertainties The Company continues to be subject to the risks and challenges associated with other companies at a similar stage of development, including risks associated with: dependence on key personnel; successful marketing and sale of its solutions and adaptation of such solutions to changing market dynamics and customer preferences; competition from alternative products and services, including from larger companies that have greater name recognition, longer operating histories, more and better established customer relationships and greater resources than the Company; and the ability to raise additional capital to support future growth. Since inception through September 30, 2017, the Company has incurred losses from operations, and accumulated a deficit of $219.1 million, and has been dependent on equity and debt financing to fund operations. Significant Accounting Policies There have been no material changes to our significant accounting policies and estimates as previously disclosed in the Company’s Form 10-K. Recently Adopted Accounting Pronouncements In May 2017, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, 2017-09 Compensation-Stock Compensation (Topic 718) Scope of Modification Accounting. ASU 2017-09 provides clarification on when modification accounting should be used for changes to the terms or conditions of a share-based payment award. This ASU does not change the accounting for modifications but clarifies that modification accounting guidance should only be applied if there is a change to the value, vesting conditions, or award classification and would not be required if the changes are considered non-substantive. The Company elected to early adopt this new standard in the second quarter of 2017. The adoption of this standard did not have a material impact on the Company’s financial statements. In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, adopted this new standard as of January 1, 2017. As of December 31, 2016, the Company has accumulated excess tax benefits from temporary differences in the amount and timing of stock-based compensation expense and the Company’s deductions on its income tax return from the award compensation that reduces the net operating loss deferred tax asset. The Company provided a full valuation allowance against its net deferred tax assets since it has been determined that it is more likely than not that all of the deferred tax assets will not be realized. Upon adoption of this standard, the stock-based compensation excess tax benefit was eliminated, resulting in an increase to the net operating loss deferred tax asset, with an increase in the valuation allowance of the same. The Company elected to continue to estimate the number of share-based awards expected to vest, rather than electing to account for forfeitures as they occur to determine the amount of stock-based compensation expense to be recognized each period. The adoption of this standard did not have a material impact on the Company’s financial statements. New Accounting Pronouncements Not Yet Adopted In October 2016, the FASB issued ASU 2016-16 , Inter-Entity Transfers of Assets other than Inventory In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), and the guidance must be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of adoption. Based on a preliminary assessment, the Company does not believe this standard will have a material impact on subscription or services revenue recognition in its consolidated financial statements. However, the standard will require the Company to capitalize certain contract costs, such as commissions, which are currently being expensed as incurred. Because these costs will now be capitalized and amortized over the respective term of the transaction, the Company expects that adoption of this standard will result in marginally lower sales and marketing expense in scenarios where current period sales results are higher than the prior period sales results. In scenarios where current period sales results are lower than the prior period sales results, the Company expects sales and marketing expenses would be marginally higher than if the Company had expensed these selling costs as incurred. The Company currently does not believe this will have a material impact on the Company’s financial statements, specifically as a reduction or increase to sales and marketing expense on an annual or quarterly basis. Additionally, the new guidance requires enhanced disclosures, including revenue recognition policies to identify performance obligations to customers and significant judgments in measurement and recognition. The Company currently anticipates adopting the new standard on January 1, 2018 utilizing the full retrospective transition method.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 2. Fair Value Measurements The following tables present information about the Company’s financial assets and liabilities that have been measured at fair value as of September 30, 2017 and December 31, 2016, and indicates the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands): September 30, 2017 Level 1 Level 2 Level 3 Total Money market funds $ 11,667 $ — $ — $ 11,667 Corporate notes and obligations — 45,879 — 45,879 U.S. government treasury securities 60,370 — — 60,370 $ 72,037 $ 45,879 $ — $ 117,916 December 31, 2016 Level 1 Level 2 Level 3 Total Money market funds $ 18,029 $ — $ — $ 18,029 Corporate notes and obligations — 33,840 — 33,840 U.S. government treasury securities 41,347 — — 41,347 $ 59,376 $ 33,840 $ — $ 93,216 At f c c

Investments

Investments	9 Months Ended
	Sep. 30, 2017
Available For Sale Securities [Abstract]
Investments	Note 3. Investments Available-for-sale securities consist of fixed-income securities that are accounted for at fair value. Available-for-sale securities with an original maturity of 90 days or less are classified within cash and cash equivalents in the condensed consolidated balance sheets. Premiums and discounts paid on securities at the time of purchase are recorded as accrued interest and amortized over the period of maturity. As of September 30, 2017, the Company did not hold any investments with a maturity date greater than one year. The amortized cost and fair value on the available-for-sale investments and unrealized gains and losses as of September 30, 2017 and December 31, 2016 were as follows (in thousands): September 30, 2017 Amortized Gross Unrealized Gross Unrealized Fair Cost Gains Losses Value Amounts maturing in one year or less Corporate notes and obligations $ 45,889 $ 1 $ (11 ) $ 45,879 U.S. government treasury securities 60,454 — (84 ) 60,370 Total short-term available-for-sale debt securities $ 106,343 $ 1 $ (95 ) $ 106,249 December 31, 2016 Amortized Gross Unrealized Gross Unrealized Fair Cost Gains Losses Value Amounts maturing in one year or less Corporate notes and obligations $ 29,866 $ — $ (25 ) $ 29,841 U.S. government treasury securities 6,900 — — 6,900 Total short-term available-for-sale debt securities $ 36,766 $ — $ (25 ) $ 36,741 Amounts maturing in greater than one year Corporate notes and obligations $ 4,010 $ — $ (11 ) $ 3,999 U.S. government treasury securities 34,505 — (58 ) 34,447 Total long-term available-for-sale debt securities $ 38,515 $ — $ (69 ) $ 38,446 As of September 30, 2017 and December 31, 2016, the Company did not consider any of the unrealized losses on its investments to be other-than-temporarily impaired based on its evaluation of available evidence. None of the investments held as of September 30, 2017 and December 31, 2016 have been in a continuous unrealized loss position for more than 12 months. Realized gains and losses on sales of available-for-sale securities were immaterial for both periods presented.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2017
Stockholders Equity Note [Abstract]
Stockholders' Equity	Note 4. Stockholders’ Equity Preferred Stock As of September 30, 2017, the Company had authorized 5,000,000 shares of preferred stock, par value $0.0001, of which no shares were outstanding. Common Stock As of September 30, 2017 the Company had authorized 451,000,000 shares of Class A common stock and 44,000,000 shares of Class B common stock, each par value $0.0001 per share, of which 23,049,295 shares and 17,327,005 shares of Class A and Class B common stock, respectively, were issued and outstanding. Holders of Class A and Class B common stock are entitled to one vote per share and ten votes per share, respectively. Each share of Class B common stock is convertible at any time at the option of the holder into one share of Class A common stock. In addition, each share of Class B common stock will convert automatically into one share of Class A common stock upon transfer, subject to certain exceptions, and upon the earlier of (1) the seventh anniversary of the closing of the IPO, and (2) the date on which the Class B common stock ceases to represent at least 25% of the outstanding common stock. The shares of Class A common stock and Class B common stock are identical, except for voting and conversion rights. During the nine months ended September 30, 2017, 14,165,862 shares of Class B common stock were converted into 14,165,862 shares of Class A common stock at the request of the holders thereof.

Equity Incentive Plans

Equity Incentive Plans	9 Months Ended
	Sep. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity Incentive Plans	Note 5. Equity Incentive Plans 2016 Equity Incentive Plan The Company’s 2016 Equity Incentive Plan, or the 2016 Plan, became effective on September 21, 2016. The 2016 Plan provides for the grant of incentive stock options, or ISOs, within the meaning of Section 422 of the Internal Revenue Code, to the Company’s employees or any of the Company’s subsidiaries’ employees, and for the grant of nonstatutory stock options, or NSOs, restricted stock, restricted stock units, stock appreciation rights, performance units and performance shares to employees, directors and consultants of the Company and the Company’s subsidiaries’ employees and consultants. As of September 30, 2017, the total number of shares available for issuance under the 2016 Plan was 4,538,495. These available shares will automatically increase each January 1, by the least of 5,500,000 shares of Class A common stock, 5% of the outstanding shares of all classes of the Company’s common stock as of the last day of the Company’s immediately preceding fiscal year, and such other amount as the Company’s board of directors may determine on or before the last day of the Company’s immediately preceding fiscal year. 2016 Employee Stock Purchase Plan The Company’s Employee Stock Purchase Plan, or 2016 ESPP, became effective on September 21, 2016. As of September 30, 2017, the total number of shares of Class A common stock available for issuance under the 2016 ESPP was 967,818. These available shares will automatically increase each January 1, by the least of 1,600,000 shares of Class A common stock, 1% of the number of shares of all classes of the Company’s common stock outstanding on the immediately preceding fiscal year, and such lesser number of shares as determined by the Company’s board of directors. The 2016 ESPP allows eligible employees to purchase shares of the Company’s Class A common stock at a discount through payroll deductions of their eligible compensation, subject to any plan limitations. Except for the initial offering period, the 2016 ESPP provides for separate six-month offering periods beginning November 30 and May 31 of each fiscal year. The initial offering period ran from September 23, 2016 through May 31, 2017. The initial offering period included the employee enrollment period, which ran from September 23, 2016 to November 10, 2016, at which time employee deductions commenced. On each purchase date, eligible employees will purchase the Company’s Class A common stock at a price per share equal to 85% of the lesser of (1) the fair market value of the Company’s Class A common stock on the first trading day of the offering period, which for the initial offering period was the initial price to public in the IPO, and (2) the fair market value of the Company’s common stock on the purchase date. No shares of Class A common stock were purchased under the 2016 ESPP during the three months ended September 30, 2017. During the nine months ended September 30, 2017, 165,559 shares of Class A common stock were purchased under the 2016 ESPP. Stock Options Stock option activity during the nine months ended September 30, 2017 was as follows (in thousands, except per share and contractual life data): Weighted- Weighted- Average Average Remaining Total Options Exercise Price Contractual Intrinsic Outstanding per Share Life (years) Value Outstanding at December 31, 2016 11,203 $ 9.49 Options granted 291 14.08 Options exercised (1,877 ) 4.79 Options forfeited or canceled (684 ) 13.85 Outstanding at September 30, 2017 8,933 $ 10.29 6.55 $ 73,081 Vested and expected to vest at September 30, 2017 8,826 $ 10.24 6.50 $ 72,672 Exercisable at September 30, 2017 6,051 $ 8.47 5.66 $ 60,489 As of September 30, 2017, there was a total of $16.8 million of unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested stock-based compensation arrangements associated with options granted. That cost is expected to be recognized over a weighted-average remaining expected term of 2.3 years. RSUs RSU activity under the 2016 Plan during the nine months ended September 30, 2017 was as follows (in thousands, except per share data): Weighted-Average RSUs Grant Date Fair Value Outstanding per Share Non-Vested outstanding at December 31, 2016 628 $ 16.43 Granted 1,397 14.39 Vested — — Forfeited or canceled (148 ) 15.55 Non-Vested outstanding at September 30, 2017 1,877 $ 14.98 As of September 30, 2017, total unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested RSUs was approximately $24.3 million and the weighted-average remaining vesting period was 3.4 years. Stock-based compensation expense recognized in the Company’s statement of comprehensive loss was as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Cost of revenue Subscription $ 330 $ 232 927 $ 564 Professional services 294 190 842 557 Operating expenses Research and development 1,179 698 3,332 1,965 Sales and marketing 1,239 735 3,316 2,176 General and administrative 1,315 632 3,250 1,640 Total stock-based compensation $ 4,357 $ 2,487 $ 11,667 $ 6,902

Net Loss Per Share Attributable

Net Loss Per Share Attributable to Common Stockholders	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Net Loss Per Share Attributable to Common Stockholders	Note 6. Net Loss Per Share Attributable to Common Stockholders The Company calculates basic and diluted net loss per share attributable to common stockholders in conformity with the two-class method required for companies with participating securities. The Company considered all series of convertible preferred stock outstanding prior to the IPO to be participating securities. Under the two-class method, the net loss attributable to common stockholders is not allocated to the convertible preferred stock as the holders of convertible preferred stock do not have a contractual obligation to share in losses. The diluted net loss per share attributable to common stockholders is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. For purposes of this calculation, convertible preferred stock, options to purchase common stock and warrants to purchase common stock and convertible preferred stock are considered common stock equivalents but have been excluded from the calculation of diluted net loss per share attributable to common stockholders as their effect is antidilutive. Basic and diluted net loss per share was the same for each period presented, as the inclusion of all potential common shares outstanding would have been antidilutive. The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Numerator: Net loss attributable to common stockholders $ (5,171 ) $ (8,755 ) $ (18,731 ) $ (23,636 ) Denominator: Weighted-average common shares outstanding - basic and diluted 40,120 13,884 39,240 13,307 Net loss per common share - basic and diluted $ (0.13 ) $ (0.63 ) $ (0.48 ) $ (1.78 ) The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because the impact of including them would have been antidilutive (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Options to purchase common shares 9,224 11,514 10,127 10,862 Restricted stock units 1,829 — 1,257 — Employee stock purchase plan shares 158 — 207 — Common stock warrant 11 46 11 36 Convertible preferred shares (as converted) — 17,645 — 18,040 Preferred stock warrant (as converted) — 26 — 27 11,222 29,231 11,602 28,965

Segments

Segments	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segments	Note 7. Segments The Company operates its business as one operating segment. Its chief operating decision makers, or CODMs, are its Chief Executive Officer and Chief Financial Officer. The CODMs review separate revenue information for the Company’s subscription and professional services revenue, and all other financial information, including free cash flow, presented on a consolidated basis, for purposes of making operating decisions, assessing financial performance and allocating resources. Revenue The following table sets forth the Company’s total revenue by geographic area for the three and nine months ended September 30, 2017 and 2016, as determined based on the billing address of the customer (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 North America $ 33,541 $ 29,941 $ 98,080 $ 87,341 Europe 10,928 9,066 31,470 24,259 APAC 2,527 1,620 6,602 4,649 $ 46,996 $ 40,627 $ 136,152 $ 116,249 Revenue attributed to the United States was approximately 99% of North America revenue for the three and nine months ended September 30, 2017 and 2016.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 8. Commitments and Contingencies Leases The Company has entered into non-cancellable operating leases, primarily related to rental of office space and certain office equipment. Certain lease agreements include rent payment escalation clauses and free rent (rent holidays). The total amount of base rentals over the term of the leases is charged to expense using the straight-line method with the amount of the rental expense in excess of lease payments recorded as a deferred rent liability. There have been no material changes to operating leases compared to those discussed in Note 11 of the notes to the consolidated financial statements as disclosed in the Company’s Form 10-K. Other Commitments The Company has entered into certain other non-cancellable agreements for software and marketing services that specify all significant terms, including fixed or minimum services to be used, pricing provisions and the approximate timing of the transaction. There have been no material changes for commitments compared to those discussed in Note 11 of the notes to the consolidated financial statements as disclosed in the Company’s Form 10-K. Legal Matters From time to time, the Company has become involved in claims and other legal matters arising in the ordinary course of business. The Company makes a provision for a liability relating to legal matters when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed at least quarterly and adjusted to reflect the impacts of negotiations, estimated settlements, legal rulings, advice of legal counsel and other information and events pertaining to a particular matter. Although claims are inherently unpredictable, the Company is currently not aware of any matters that may have a material adverse effect on the Company’s business, financial position, results of operations or cash flows, individually or in the aggregate.

Description of Operations and15

Description of Operations and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Description Of Operations And Summary Of Significant Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America, or GAAP, and applicable rules and regulations of the Securities and Exchange Commission, or SEC, regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016 filed with the SEC on February 17, 2017, or Form 10-K. The condensed consolidated balance sheet as of December 31, 2016, included herein, was derived from the audited annual financial statements as of that date, but does not include all disclosures including certain notes required by GAAP on an annual reporting basis. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to fairly state the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full year 2017 or any future period.
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ materially from those estimates.
Certain Significant Risks And Uncertainties	Certain Significant Risks and Uncertainties The Company continues to be subject to the risks and challenges associated with other companies at a similar stage of development, including risks associated with: dependence on key personnel; successful marketing and sale of its solutions and adaptation of such solutions to changing market dynamics and customer preferences; competition from alternative products and services, including from larger companies that have greater name recognition, longer operating histories, more and better established customer relationships and greater resources than the Company; and the ability to raise additional capital to support future growth. Since inception through September 30, 2017, the Company has incurred losses from operations, and accumulated a deficit of $219.1 million, and has been dependent on equity and debt financing to fund operations.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In May 2017, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, 2017-09 Compensation-Stock Compensation (Topic 718) Scope of Modification Accounting. ASU 2017-09 provides clarification on when modification accounting should be used for changes to the terms or conditions of a share-based payment award. This ASU does not change the accounting for modifications but clarifies that modification accounting guidance should only be applied if there is a change to the value, vesting conditions, or award classification and would not be required if the changes are considered non-substantive. The Company elected to early adopt this new standard in the second quarter of 2017. The adoption of this standard did not have a material impact on the Company’s financial statements. In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, adopted this new standard as of January 1, 2017. As of December 31, 2016, the Company has accumulated excess tax benefits from temporary differences in the amount and timing of stock-based compensation expense and the Company’s deductions on its income tax return from the award compensation that reduces the net operating loss deferred tax asset. The Company provided a full valuation allowance against its net deferred tax assets since it has been determined that it is more likely than not that all of the deferred tax assets will not be realized. Upon adoption of this standard, the stock-based compensation excess tax benefit was eliminated, resulting in an increase to the net operating loss deferred tax asset, with an increase in the valuation allowance of the same. The Company elected to continue to estimate the number of share-based awards expected to vest, rather than electing to account for forfeitures as they occur to determine the amount of stock-based compensation expense to be recognized each period. The adoption of this standard did not have a material impact on the Company’s financial statements.
New Accounting Pronouncements Not Yet Adopted	New Accounting Pronouncements Not Yet Adopted In October 2016, the FASB issued ASU 2016-16 , Inter-Entity Transfers of Assets other than Inventory In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), and the guidance must be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of adoption. Based on a preliminary assessment, the Company does not believe this standard will have a material impact on subscription or services revenue recognition in its consolidated financial statements. However, the standard will require the Company to capitalize certain contract costs, such as commissions, which are currently being expensed as incurred. Because these costs will now be capitalized and amortized over the respective term of the transaction, the Company expects that adoption of this standard will result in marginally lower sales and marketing expense in scenarios where current period sales results are higher than the prior period sales results. In scenarios where current period sales results are lower than the prior period sales results, the Company expects sales and marketing expenses would be marginally higher than if the Company had expensed these selling costs as incurred. The Company currently does not believe this will have a material impact on the Company’s financial statements, specifically as a reduction or increase to sales and marketing expense on an annual or quarterly basis. Additionally, the new guidance requires enhanced disclosures, including revenue recognition policies to identify performance obligations to customers and significant judgments in measurement and recognition. The Company currently anticipates adopting the new standard on January 1, 2018 utilizing the full retrospective transition method.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Schedule of Financial Assets and Liabilities Measured at Fair Value	The following tables present information about the Company’s financial assets and liabilities that have been measured at fair value as of September 30, 2017 and December 31, 2016, and indicates the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands): September 30, 2017 Level 1 Level 2 Level 3 Total Money market funds $ 11,667 $ — $ — $ 11,667 Corporate notes and obligations — 45,879 — 45,879 U.S. government treasury securities 60,370 — — 60,370 $ 72,037 $ 45,879 $ — $ 117,916 December 31, 2016 Level 1 Level 2 Level 3 Total Money market funds $ 18,029 $ — $ — $ 18,029 Corporate notes and obligations — 33,840 — 33,840 U.S. government treasury securities 41,347 — — 41,347 $ 59,376 $ 33,840 $ — $ 93,216

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2017
Available For Sale Securities [Abstract]
Amortized Cost and Fair Value on Available-for-Sale Investments and Unrealized Gains and Losses	The amortized cost and fair value on the available-for-sale investments and unrealized gains and losses as of September 30, 2017 and December 31, 2016 were as follows (in thousands): September 30, 2017 Amortized Gross Unrealized Gross Unrealized Fair Cost Gains Losses Value Amounts maturing in one year or less Corporate notes and obligations $ 45,889 $ 1 $ (11 ) $ 45,879 U.S. government treasury securities 60,454 — (84 ) 60,370 Total short-term available-for-sale debt securities $ 106,343 $ 1 $ (95 ) $ 106,249 December 31, 2016 Amortized Gross Unrealized Gross Unrealized Fair Cost Gains Losses Value Amounts maturing in one year or less Corporate notes and obligations $ 29,866 $ — $ (25 ) $ 29,841 U.S. government treasury securities 6,900 — — 6,900 Total short-term available-for-sale debt securities $ 36,766 $ — $ (25 ) $ 36,741 Amounts maturing in greater than one year Corporate notes and obligations $ 4,010 $ — $ (11 ) $ 3,999 U.S. government treasury securities 34,505 — (58 ) 34,447 Total long-term available-for-sale debt securities $ 38,515 $ — $ (69 ) $ 38,446

Equity Incentive Plans (Tables)

Equity Incentive Plans (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Stock Option Activity	Stock option activity during the nine months ended September 30, 2017 was as follows (in thousands, except per share and contractual life data): Weighted- Weighted- Average Average Remaining Total Options Exercise Price Contractual Intrinsic Outstanding per Share Life (years) Value Outstanding at December 31, 2016 11,203 $ 9.49 Options granted 291 14.08 Options exercised (1,877 ) 4.79 Options forfeited or canceled (684 ) 13.85 Outstanding at September 30, 2017 8,933 $ 10.29 6.55 $ 73,081 Vested and expected to vest at September 30, 2017 8,826 $ 10.24 6.50 $ 72,672 Exercisable at September 30, 2017 6,051 $ 8.47 5.66 $ 60,489
Summary of RSU Activity Under 2016 Plan	RSU activity under the 2016 Plan during the nine months ended September 30, 2017 was as follows (in thousands, except per share data): Weighted-Average RSUs Grant Date Fair Value Outstanding per Share Non-Vested outstanding at December 31, 2016 628 $ 16.43 Granted 1,397 14.39 Vested — — Forfeited or canceled (148 ) 15.55 Non-Vested outstanding at September 30, 2017 1,877 $ 14.98
Summary of Stock Based Compensation Expenses	Stock-based compensation expense recognized in the Company’s statement of comprehensive loss was as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Cost of revenue Subscription $ 330 $ 232 927 $ 564 Professional services 294 190 842 557 Operating expenses Research and development 1,179 698 3,332 1,965 Sales and marketing 1,239 735 3,316 2,176 General and administrative 1,315 632 3,250 1,640 Total stock-based compensation $ 4,357 $ 2,487 $ 11,667 $ 6,902

Net Loss Per Share Attributab19

Net Loss Per Share Attributable to Common Stockholders (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Loss Per Share	The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Numerator: Net loss attributable to common stockholders $ (5,171 ) $ (8,755 ) $ (18,731 ) $ (23,636 ) Denominator: Weighted-average common shares outstanding - basic and diluted 40,120 13,884 39,240 13,307 Net loss per common share - basic and diluted $ (0.13 ) $ (0.63 ) $ (0.48 ) $ (1.78 )
Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Share	The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because the impact of including them would have been antidilutive (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Options to purchase common shares 9,224 11,514 10,127 10,862 Restricted stock units 1,829 — 1,257 — Employee stock purchase plan shares 158 — 207 — Common stock warrant 11 46 11 36 Convertible preferred shares (as converted) — 17,645 — 18,040 Preferred stock warrant (as converted) — 26 — 27 11,222 29,231 11,602 28,965

Segments (Tables)

Segments (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Summary of Revenue by Geographic Areas	The following table sets forth the Company’s total revenue by geographic area for the three and nine months ended September 30, 2017 and 2016, as determined based on the billing address of the customer (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 North America $ 33,541 $ 29,941 $ 98,080 $ 87,341 Europe 10,928 9,066 31,470 24,259 APAC 2,527 1,620 6,602 4,649 $ 46,996 $ 40,627 $ 136,152 $ 116,249

Description of Operations and21

Description of Operations and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended
	Sep. 30, 2016	Sep. 30, 2017	Dec. 31, 2016
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Accumulated deficit		$ (219,055)	$ (200,324)
Common Class B Converted From Common Stock Warrants
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Conversion ratio	100.00%
Warrants outstanding	47,893
Common Class B Converted From Common
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Conversion ratio	100.00%
Common Class B Converted From Convertible Preferred Stock Warrant
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Conversion ratio	100.00%
Warrants outstanding	27,321
Convertible Preferred Stock
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Conversion of preferred stock to Class B common stock, Shares	18,239,475
IPO | Class A Common Stock
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Shares sold (in shares)	6,900,000
Share price (in dollars per share)	$ 16
Net proceeds after deducting underwriting discounts and commissions and offering expenses	$ 99,000

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, net asset (liability)	$ 117,916	$ 93,216
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, net asset (liability)	72,037	59,376
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, net asset (liability)	45,879	33,840
Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	11,667	18,029
Money Market Funds | Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	11,667	18,029
Corporate Notes and Obligations
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	45,879	33,840
Corporate Notes and Obligations | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	45,879	33,840
U.S. Government Treasury Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	60,370	41,347
U.S. Government Treasury Securities | Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	$ 60,370	$ 41,347

Investments - Additional Inform

Investments - Additional Information (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Available For Sale Securities [Abstract]
Long-term investments	$ 0
Other-than-temporarily impairment, unrealized losses on available-for-sale investments	0	$ 0
Available-for-sale investments that have been in continuous unrealized loss position for more than 12 months	$ 0	$ 0

Investments - Amortized Cost an

Investments - Amortized Cost and Fair Value on Available-for-Sale Investments and Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Amounts Maturing in One Year or Less
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	$ 106,343	$ 36,766
Available-for-sale debt securities, Gross Unrealized Gains	1
Available-for-sale debt securities, Gross Unrealized Losses	(95)	(25)
Available-for-sale debt securities, Fair Value	106,249	36,741
Amounts Maturing in One Year or Less | Corporate Notes and Obligations
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	45,889	29,866
Available-for-sale debt securities, Gross Unrealized Gains	1
Available-for-sale debt securities, Gross Unrealized Losses	(11)	(25)
Available-for-sale debt securities, Fair Value	45,879	29,841
Amounts Maturing in One Year or Less | U.S. Government Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	60,454	6,900
Available-for-sale debt securities, Gross Unrealized Losses	(84)
Available-for-sale debt securities, Fair Value	$ 60,370	6,900
Amounts Maturing in Greater than One Year
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost		38,515
Available-for-sale debt securities, Gross Unrealized Losses		(69)
Available-for-sale debt securities, Fair Value		38,446
Amounts Maturing in Greater than One Year | Corporate Notes and Obligations
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost		4,010
Available-for-sale debt securities, Gross Unrealized Losses		(11)
Available-for-sale debt securities, Fair Value		3,999
Amounts Maturing in Greater than One Year | U.S. Government Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost		34,505
Available-for-sale debt securities, Gross Unrealized Losses		(58)
Available-for-sale debt securities, Fair Value		$ 34,447

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details)	9 Months Ended
	Sep. 30, 2017$ / sharesshares
Class Of Stock [Line Items]
Preferred stock, shares authorized	5,000,000
Preferred stock, par value | $ / shares	$ 0.0001
Preferred stock, shares outstanding	0
Conversion of stock, description	Each share of Class B common stock is convertible at any time at the option of the holder into one share of Class A common stock. In addition, each share of Class B common stock will convert automatically into one share of Class A common stock upon transfer, subject to certain exceptions, and upon the earlier of (1) the seventh anniversary of the closing of the IPO, and (2) the date on which the Class B common stock ceases to represent at least 25% of the outstanding common stock.
Class A Common Stock
Class Of Stock [Line Items]
Common stock, shares authorized	451,000,000
Common stock, par value | $ / shares	$ 0.0001
Common stock, shares issued	23,049,295
Common stock, shares outstanding	23,049,295
Common stock, entitled for voting rights	one vote per share
Number of shares issued for conversion	14,165,862
Class B Common Stock
Class Of Stock [Line Items]
Common stock, shares authorized	44,000,000
Common stock, par value | $ / shares	$ 0.0001
Common stock, shares issued	17,327,005
Common stock, shares outstanding	17,327,005
Common stock, entitled for voting rights	ten votes per share
Percentage of outstanding common stock, minimum	25.00%
Number of shares converted	14,165,862

Equity Incentive Plans - Additi

Equity Incentive Plans - Additional Information (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2017USD ($)shares	Sep. 30, 2017USD ($)shares
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost | $	$ 16.8	$ 16.8
Weighted-average remaining expected term		2 years 3 months 19 days
RSU
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average remaining expected term		3 years 4 months 25 days
Unrecognized compensation cost | $	$ 24.3	$ 24.3
2016 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	4,538,495	4,538,495
2016 Equity Incentive Plan | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Automatically increase percentage of shares of all classes of company’s common stock outstanding	5.00%	5.00%
2016 Equity Incentive Plan | Class A Common Stock | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Automatically increase of shares reserved for issuance	5,500,000	5,500,000
2016 Employee Stock Purchase Plan | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Automatically increase percentage of shares of all classes of company’s common stock outstanding	1.00%	1.00%
2016 Employee Stock Purchase Plan | Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	967,818	967,818
Purchase price of common stock, percent		85.00%
Number of shares purchased	0	165,559
2016 Employee Stock Purchase Plan | Class A Common Stock | IPO
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Initial public offering date		Sep. 23, 2016
2016 Employee Stock Purchase Plan | Class A Common Stock | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Automatically increase of shares reserved for issuance	1,600,000	1,600,000

Equity Incentive Plans - Summar

Equity Incentive Plans - Summary of Stock Option Activity (Details) - Stock Option $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)$ / sharesshares
Options Outstanding
Outstanding at beginning of period | shares	11,203,000
Options granted | shares	291,000
Options exercised | shares	(1,877,000)
Options forfeited or canceled | shares	(684,000)
Outstanding at end of period | shares	8,933,000
Vested and expected to vest at end of period | shares	8,826,000
Exercisable at end of period | shares	6,051,000
Weighted Average Exercise Price per Share
Outstanding at beginning of period | $ / shares	$ 9.49
Options granted | $ / shares	14.08
Options exercised | $ / shares	4.79
Options forfeited or canceled | $ / shares	13.85
Outstanding at end of period | $ / shares	10.29
Vested and expected to vest at end of period | $ / shares	10.24
Exercisable at end of period | $ / shares	$ 8.47
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding	6 years 6 months 18 days
Vested and expected to vest at end of period	6 years 6 months
Exercisable at end of period	5 years 7 months 28 days
Total Intrinsic Value | $	$ 73,081
Vested and expected to vest at end of period | $	72,672
Exercisable at end of period | $	$ 60,489

Equity Incentive Plans - Summ28

Equity Incentive Plans - Summary of RSU Activity Under 2016 Plan (Details) - RSU shares in Thousands	9 Months Ended
	Sep. 30, 2017$ / sharesshares
RSU Outstanding
Non-Vested outstanding at beginning period | shares	628
Granted | shares	1,397
Forfeited or canceled | shares	(148)
Non-Vested outstanding at end of period | shares	1,877
Weighted-Average Grant Date Fair Value per Share
Non-Vested outstanding at begging period | $ / shares	$ 16.43
Granted | $ / shares	14.39
Forfeited or canceled | $ / shares	15.55
Non-Vested outstanding at end of period | $ / shares	$ 14.98

Equity Incentive Plans - Summ29

Equity Incentive Plans - Summary of Stock Based Compensation Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based Compensation	$ 4,357	$ 2,487	$ 11,667	$ 6,902
Cost of Revenue Subscription
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based Compensation	330	232	927	564
Cost of Revenue Professional Services
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based Compensation	294	190	842	557
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based Compensation	1,179	698	3,332	1,965
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based Compensation	1,239	735	3,316	2,176
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based Compensation	$ 1,315	$ 632	$ 3,250	$ 1,640

Net Loss Per Share Attributab30

Net Loss Per Share Attributable to Common Stockholders - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net loss attributable to common stockholders	$ (5,171)	$ (8,755)	$ (18,731)	$ (23,636)
Denominator:
Weighted-average common shares outstanding - basic and diluted	40,120	13,884	39,240	13,307
Net loss per common share - basic and diluted	$ (0.13)	$ (0.63)	$ (0.48)	$ (1.78)

Net Loss Per Share Attributab31

Net Loss Per Share Attributable to Common Stockholders - Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share	11,222	29,231	11,602	28,965
Employee Stock Purchase Plan Shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share	158		207
Options to Purchase Common Shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share	9,224	11,514	10,127	10,862
Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share	1,829		1,257
Common Stock Warrant
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share	11	46	11	36
Preferred Stock Warrant (as converted)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share		26		27
Convertible Preferred Shares (as converted)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share		17,645		18,040

Segments - Additional Informati

Segments - Additional Information (Details) - Segment	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Number of operating segment			1
North America | Revenue | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Percentage of revenue attributable to United States	99.00%	99.00%	99.00%	99.00%

Segments - Summary of Revenue b

Segments - Summary of Revenue by Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 46,996	$ 40,627	$ 136,152	$ 116,249
North America
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	33,541	29,941	98,080	87,341
Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	10,928	9,066	31,470	24,259
APAC
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 2,527	$ 1,620	$ 6,602	$ 4,649