Apptio 10-Q 4 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 31, 2016
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
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		6,900,000
Class B Common Stock
Entity Common Stock, Shares Outstanding		31,411,927

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 111,712	$ 17,256
Short-term investments	10,818	6,260
Accounts receivable, net of allowance for doubtful accounts of $215 and $289	42,585	52,887
Prepaid expenses and other current assets	5,249	3,990
Total current assets	170,364	80,393
Long-term assets
Property and equipment, net of accumulated depreciation of $15,703 and $12,774	13,058	13,487
Restricted cash		2,500
Deferred initial public offering costs		1,973
Other long-term assets	616	798
Total assets	184,038	99,151
Current liabilities
Accounts payable	6,375	3,462
Accrued payroll and other expenses	12,456	14,732
Deferred revenue	81,415	82,422
Deferred rent	784	613
Capital leases	42	42
Total current liabilities	101,072	101,271
Long-term liabilities
Deferred revenue, net of current portion	2,346	803
Deferred rent, net of current portion	4,540	4,810
Capital leases, net of current portion	62	95
Preferred stock warrant liability		414
Asset retirement obligation	184	210
Total liabilities	108,204	107,603
Commitments and contingencies (Note 9)
Convertible preferred stock		133,809
Stockholders’ equity (deficit)
Class A and Class B Common stock	4	1
Additional paid-in capital	268,240	26,509
Accumulated other comprehensive loss	(3)
Accumulated deficit	(192,407)	(168,771)
Total stockholders’ equity (deficit)	75,834	(142,261)
Total liabilities, convertible preferred stock and stockholders' equity (deficit)	$ 184,038	$ 99,151

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 215	$ 289
Accumulated depreciation	$ 15,703	$ 12,774

Condensed Consolidated Statemen

Condensed Consolidated Statement of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue
Subscription	$ 33,314	$ 25,594	$ 94,995	$ 72,836
Professional services	7,313	6,660	21,254	21,573
Total revenue	40,627	32,254	116,249	94,409
Cost of revenue
Subscription	6,921	6,173	19,960	17,315
Professional services	7,068	6,684	19,780	19,720
Total cost of revenue	13,989	12,857	39,740	37,035
Gross profit	26,638	19,397	76,509	57,374
Operating expenses
Research and development	9,015	7,928	26,072	22,602
Sales and marketing	18,300	15,855	54,256	49,129
General and administrative	6,285	5,023	16,969	12,721
Total operating expenses	33,600	28,806	97,297	84,452
Loss from operations	(6,962)	(9,409)	(20,788)	(27,078)
Other income (expense)
Interest (expense) income and other, net	(1,312)	(18)	(1,746)	1
Foreign exchange loss	(367)	(351)	(774)	(958)
Loss before provision for income taxes	(8,641)	(9,778)	(23,308)	(28,035)
Provision for income taxes	(114)	(87)	(328)	(236)
Net loss	$ (8,755)	$ (9,865)	$ (23,636)	$ (28,271)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.63)	$ (0.77)	$ (1.78)	$ (2.25)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted	13,884	12,754	13,307	12,575

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (8,755)	$ (9,865)	$ (23,636)	$ (28,271)
Other comprehensive loss
Unrealized (loss) gain on available-for-sale securities	(3)	4	(3)	2
Total comprehensive loss	$ (8,758)	$ (9,861)	$ (23,639)	$ (28,269)

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net loss	$ (23,636)	$ (28,271)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	4,487	4,916
Amortization of premiums on investments	20	67
Loss (gain) on disposal of property and equipment	26	(12)
Stock-based compensation	6,902	5,877
Accretion of capitalized loan fees	127	39
Loss on extinguishment of debt	722
Remeasurement of preferred stock warrant liability	202	57
Change in operating assets and liabilities
Accounts receivable	10,302	14,689
Prepaid expenses and other assets	(660)	(2,167)
Accounts payable	1,648	812
Accrued expenses	(2,442)	(2,199)
Deferred revenue	535	(2,959)
Deferred rent	(421)	391
Net cash used in operating activities	(2,188)	(8,760)
Cash flows from investing activities
Purchases of property and equipment	(3,518)	(6,636)
Proceeds from maturities of investments	6,245	13,309
Purchases of investments	(10,826)	(2,017)
(Payment) return of security deposits	(43)	157
Return of restricted cash	2,500	85
Net cash (used in) provided by investing activities	(5,642)	4,898
Cash flows from financing activities
Proceeds from initial public offering, net of underwriting discounts	102,672
Payment of deferred initial public offering costs	(574)	(418)
Proceeds from long-term debt	20,000
Principal payments on long-term debt	(20,000)
Payment of debt prepayment fees	(200)
Proceeds from exercise of common stock options	1,000	2,335
Principal payments on capital lease obligations	(33)	(36)
Payment of capitalized loan fees	(248)	(78)
Net cash provided by financing activities	102,617	1,803
Foreign currency effect on cash and cash equivalents	(331)	(77)
Net increase (decrease) in cash and cash equivalents	94,456	(2,136)
Cash and cash equivalents
Beginning of year	17,256	19,686
End of year	111,712	17,550
Supplemental disclosures
Purchases under capital lease obligations		102
Property and equipment additions in accounts payable and accrued expenses	419	37
Leasehold improvements paid directly by lessor	356
Non-cash debt issuance costs	285	90
Deferred initial public offering cost accruals	1,004	$ 1,163
Non-cash preferred stock warrant exercise	$ 616

Description of Operations and S

Description of Operations and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
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 in the United States, the United Kingdom, Germany, Denmark, the Netherlands, Australia, Canada, France and Singapore. 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 $99.1 million, after deducting underwriting discounts and commissions and offering expenses paid and payable by the Company, 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 shares of Class B common stock on a one-for-one basis, (3) a warrant to purchase shares of convertible preferred stock was converted to a warrant to purchase shares of Class B common stock, and (4) all shares of convertible preferred stock then outstanding were converted into 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 5 for further discussion of Class A and B common stock. As of September 30, 2016, 6,900,000 shares of the Company’s Class A common stock and 31,398,491 shares of the Company’s Class B common stock were outstanding. Deferred Offering Costs Deferred offering costs of $3.6 million, consisting of legal, accounting and other fees and costs related to the IPO, were reclassified to additional paid-in capital as a reduction of the proceeds upon the closing of our IPO on September 28, 2016. 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 final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended, on September 23, 2016, or the Prospectus. The condensed consolidated balance sheet as of December 31, 2015, 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 2016 or any future period. Principles of Consolidation The condensed consolidated financial statements include the Company and its wholly-owned subsidiaries. All significant 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, 2016, the Company has incurred losses from operations, and accumulated a deficit of $192.4 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 Prospectus. Recently Adopted Accounting Pronouncements In August 2016, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, No. 2016-15, Classification of Certain Cash Receipts and Cash Payments the Jump-start Our Business Start-ups Act, or In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes New Accounting Pronouncements Not Yet Adopted In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, 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), Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net), Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements – Going Concern (Subtopic 205-40),

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2016
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, 2016 and December 31, 2015, and indicates the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands): As of September 30, 2016 Level 1 Level 2 Level 3 Total Money market funds $ 82,485 $ — $ — $ 82,485 Corporate notes and obligations — 8,418 — 8,418 U.S. agency securities — 2,400 — 2,400 $ 82,485 $ 10,818 $ — $ 93,303 As of December 31, 2015 Level 1 Level 2 Level 3 Total Money market funds $ 8,015 $ — $ — $ 8,015 Corporate notes and obligations — 2,245 — 2,245 U.S. agency securities — 3,015 — 3,015 U.S. government treasury securities 1,000 — — 1,000 Preferred stock warrant liability — — (414 ) (414 ) $ 9,015 $ 5,260 $ (414 ) $ 13,861 At f c c The Company’s Black-Scholes The following Balance as of December 31, 2015 $ 414 Changes in fair value of underlying warrant securities, recorded to interest expense 202 Conversion of warrant, recorded to additional paid-in capital (616 ) Balance as of September 30, 2016 $ —

Investments

Investments	9 Months Ended
	Sep. 30, 2016
Available For Sale Securities [Abstract]
Investments	Note 3. Investments Available-for-sale investments consist of fixed-income securities that are accounted for at fair value. Premiums and discounts paid on securities at the time of purchase are recorded as accrued interest and amortized over the period of maturity. The amortized cost and fair value on the available-for-sale investments and unrealized gains and losses as of September 30, 2016 and December 31, 2015 were as follows (in thousands): As of September 30, 2016 Amortized Gross Unrealized Gross Unrealized Fair Cost Gains Losses Value Amounts maturing in one year or less Corporate notes and obligations $ 8,421 $ 1 $ (4 ) $ 8,418 U.S. agency securities 2,400 — — 2,400 Total available-for-sale debt securities $ 10,821 $ 1 $ (4 ) $ 10,818 As of December 31, 2015 Amortized Gross Unrealized Gross Unrealized Fair Cost Gains Losses Value Amounts maturing in one year or less Corporate notes and obligations $ 2,245 $ — $ — $ 2,245 U.S. agency securities 3,016 — (1 ) 3,015 U.S. government treasury securities 999 1 — 1,000 Total available-for-sale debt securities $ 6,260 $ 1 $ (1 ) $ 6,260 As of September 30, 2016 and December 31, 2015, 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, 2016 and December 31, 2015 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.

Warrants

Warrants	9 Months Ended
	Sep. 30, 2016
Warrants [Abstract]
Warrants	Note 4. Warrants Convertible Preferred Stock Warrant The Company previously issued a warrant to purchase 27,321 shares of Series A convertible preferred stock in conjunction with a loan and security agreement with Silicon Valley Bank, or SVB, at an exercise price of $1.37255 per share. Immediately prior to the completion of the IPO, this warrant was converted to a warrant to purchase 27,321 shares of Class B common stock. The fair value of the warrant at the time of conversion was $0.6 million and was recorded as additional paid-in capital and a reduction of the preferred stock warrant liability. On September 26, 2016, the warrant holder exercised the warrant and the Company issued 25,658 shares of Class B common stock through a cashless exercise of the warrant, in accordance with its terms. Common Stock Warrants In connection with entering into and amending the senior credit facility, see Note 10, the Company issued warrants to purchase 21,444 shares of Class B common stock at an exercise price of $13.99 per share and 5,241 shares of Class B common stock at an exercise price of $14.31 per share. The warrants were recorded as additional paid-in capital and as debt issuance costs on the condensed consolidated balance sheet. In connection with the repayment of the debt, the unamortized debt issuance costs related to the warrants were expensed and recorded as interest expense in the condensed consolidated statements of operations. On September 26, 2016, the warrant holders exercised these warrants and the Company issued 10,055 shares of Class B common stock through a cashless exercise of the warrants. The impact of this exercise was immaterial to the financial statements. In addition, in connection with entering into the subordinated loan agreement, see Note 10, the Company issued warrants to purchase an aggregate of 21,208 shares of Class B common stock at an exercise price of $14.31 per share. The warrants were recorded as additional paid-in capital and as debt issuance costs on the condensed consolidated balance sheet. In connection with the repayment of the debt, the unamortized debt issuance costs related to the warrants were expensed and recorded as interest expense in the condensed consolidated statements of operations. On September 26, 2016, one of the warrant holders exercised warrants to purchase 10,604 shares of Class B common stock. The Company issued 3,874 shares of Class B common stock through a cashless exercise of the warrants. The remaining warrants to purchase 10,604 shares of Class B common stock were outstanding as of September 30, 2016. The impact of this exercise was immaterial to the financial statements.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2016
Stockholders Equity Note [Abstract]
Stockholders' Equity	Note 5. Stockholders’ Equity Convertible Preferred Stock Immediately prior to the completion of the IPO, all shares of convertible preferred stock then outstanding were automatically converted to 18,239,475 shares of Class B common stock on a one-for-one basis. Preferred Stock As of September 30, 2016, the Company had authorized 5,000,000 shares of preferred stock, par value $0.0001, of which no shares were outstanding. Common Stock Immediately prior to the completion of the IPO, all shares of common stock then outstanding were converted to Class B common stock on a one-for-one basis. Shares offered and sold in the IPO were the newly authorized shares of Class A common stock. As of September 30, 2016 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 6,900,000 shares and 31,398,491 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. The shares of Class A common stock and Class B common stock are identical, except for voting and conversion rights. As of December 31, 2015, the Company had 12,897,001 shares of common stock outstanding.

Equity Incentive Plans

Equity Incentive Plans	9 Months Ended
	Sep. 30, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity Incentive Plans	Note 6. Equity Incentive Plans 2007 Stock Plan The Company granted options under its 2007 stock plan, as amended, or the 2007 Plan, until September 23, 2016, when the plan was terminated in connection with the Company’s IPO. Accordingly, no shares are available for future issuance under this plan. The 2007 Plan continues to govern outstanding equity awards granted thereunder. 2011 Executive Equity Incentive Plan The Company granted options under its 2011 executive equity incentive plan as amended, or the 2011 Plan, until September 23, 2016, when the plan was terminated in connection with the Company’s IPO. Accordingly, no shares are available for future issuance under this plan. The 2011 Plan continues to govern outstanding equity awards granted thereunder. 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. The total number of shares of Class A common stock reserved for issuance under the 2016 Plan is equal to (1) 3,800,000 shares plus (2) a number of shares of Class A common stock equal to the number of shares of Class B common stock subject to awards granted under the 2007 Plan and the 2011 Plan, or our Existing Plans, that, on or after September 22, 2016 expire or otherwise terminate without having been exercised in full, and a number of shares of Class A common stock equal to the number of shares of Class B common stock issued pursuant to awards granted under our Existing Plans that are forfeited to or repurchased by us, provided that the maximum number of shares of Class A common stock that may be added to the 2016 Plan pursuant to (2) is 11,663,388 shares. These available shares will automatically increase each January 1, beginning on January 1, 2017, by the lesser of 5,500,000 shares of Class A common stock, by 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, or 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. A total of 750,000 shares of the Company’s Class A common stock were initially reserved for issuance under the 2016 ESPP. These available shares will automatically increase each January 1, beginning on January 1, 2017, by the lesser 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, or 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 of up to 15% 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 will run from September 23, 2016 through May 31, 2017. 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 is the initial price to public in the IPO, and/or (2) the fair market value of the Company’s common stock on the purchase date. During the three and nine months ended September 30, 2016, no shares of Class A common stock were purchased under the 2016 ESPP. Stock option activity under the 2007 Plan, 2011 Plan and the 2016 Plan during the nine months ended September 30, 2016 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, 2015 10,506 $ 8.51 7.49 $ 60,911 Options granted 2,063 14.31 Options exercised (222 ) 4.50 Options forfeited or canceled (815 ) 11.46 Outstanding at September 30, 2016 11,532 $ 9.42 7.22 $ 141,628 Vested and expected to vest - September 30, 2016 10,612 $ 9.09 7.08 $ 133,851 Exercisable - September 30, 2016 6,496 $ 6.23 5.87 $ 100,492 Stock-based compensation expense recognized in the Company’s statement of comprehensive loss was as follows (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Cost of revenue Subscription $ 232 $ 145 $ 564 $ 341 Professional services 190 179 557 574 Research and development 698 577 1,965 1,737 Sales and marketing 735 623 2,176 1,833 General and administrative 632 498 1,640 1,392 Total stock-based compensation $ 2,487 $ 2,022 $ 6,902 $ 5,877 As of September 30, 2016, there was a total of $23.2 million of unrecognized compensation cost related to unvested stock- based compensation arrangements granted under the 2007 and 2011 Plans. That cost is expected to be recognized over a weighted-average remaining expected term of 3.04 years.

Net Loss Per Share Attributable

Net Loss Per Share Attributable to Common Stockholders	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Net Loss Per Share Attributable to Common Stockholders	Note 7. 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 considers all series of convertible preferred stock 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 Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Numerator: Net loss attributable to common stockholders $ (8,755 ) $ (9,865 ) $ (23,636 ) $ (28,271 ) Denominator: Weighted-average common shares outstanding - basic and diluted 13,884 12,754 13,307 12,575 Net loss per common share, basic and diluted $ (0.63 ) $ (0.77 ) $ (1.78 ) $ (2.25 ) 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 Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Options to purchase common shares 11,514 9,154 10,862 9,040 Common stock warrant 46 11 36 4 Convertible preferred shares (as converted) 17,645 18,240 18,040 18,240 Preferred stock warrant 26 27 27 27 29,231 27,432 28,965 27,311

Segments

Segments	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segments	Note 8. 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 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, 2016 and 2015, as determined based on the billing address of the customer (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 North America $ 29,941 $ 25,327 $ 87,341 $ 74,105 Europe 9,066 5,512 24,259 15,889 APAC 1,620 1,415 4,649 4,415 $ 40,627 $ 32,254 $ 116,249 $ 94,409 Revenue attributed to the United States was approximately 99% of North America revenue for the three and nine months ended September 30, 2016, respectively, and 99% and 98% for the three and nine months ended September 30, 2015, respectively.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 9. 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. Total rent expense for operating leases was $1.0 million and $2.8 million for the three and nine months ended September 30, 2016, respectively, and $0.9 million and $2.7 million for the three and nine months ended September 30, 2015, respectively. In May 2016, the Company amended its primary office space lease by adding an additional 9,000 square feet. The Company also finances the purchase of certain office equipment under capital lease arrangements. 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. Obligations under contracts that are cancellable are not included. 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 Prospectus. 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 investigates these claims as they arise. 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. The Company accrues estimates for resolution of legal and other contingencies when losses are probable and estimable. From time to time, the Company is a party to litigation and subject to claims incident to the ordinary course of business, including intellectual property claims, labor and employment claims, and threatened claims, breach of contract claims, and other matters. Although the results of litigation and claims are inherently unpredictable, the Company believes that there was not at least a reasonable possibility that it had incurred a material loss with respect to such loss contingencies, as of September 30, 2016, therefore, the Company has not recorded a reserve for any material contingencies.

Credit Facilities

Credit Facilities	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Credit Facilities	Note 10. Credit Facilities On April 20, 2016, the Company amended a revolving credit agreement, or the senior credit facility, with SVB and entered into a new subordinated loan and security agreement, or subordinated loan agreement, with SVB and ORIX Ventures, LLC. The Company incurred a total of $20.0 million in term loan borrowings under these agreements in 2016. Using the proceeds from the IPO, on September 28, 2016, the Company repaid $10.0 million principal amount of term borrowings under the senior credit facility, which is no longer available to be reborrowed, and $10.0 million principal amount of term borrowings under the subordinated loan and security agreement. In addition, the Company paid a debt prepayment penalty and a final payment fee in the aggregate amount of $0.2 million in connection with the foregoing repayment under the subordinated loan and security agreement. Unamortized debt issuance costs of $0.5 million were expensed and recorded as interest expense in the condensed consolidated statement of operations. The subordinated loan agreement was extinguished as a result of the repayment and no amounts were available to the Company under this agreement as of September 30, 2016. The Company can incur revolver borrowings on a borrowing base tied to the amount of eligible accounts receivable, not to exceed $15.0 million. Interest on the revolver borrowings accrues at a floating rate equal to the prime rate and is payable monthly. The revolver matures on June 16, 2017. No amounts were outstanding under the senior credit facility as of September 30, 2016 or December 31, 2015. The senior credit facility contains customary conditions to borrowing, events of default and covenants, including covenants that restrict our ability to dispose of assets, merge with or acquire other entities, incur indebtedness, incur encumbrances, make distributions to holders of our capital stock, make investments or engage in transactions with our affiliates. If the Company’s cash and cash equivalents, as defined in the senior credit facility, are below $25 million as of the last day of the applicable monthly measuring period, the Company will be required to comply with a financial covenant based on subscription and professional services bookings. This financial covenant is measured both monthly and quarterly, generally on a trailing six month basis. The Company was in compliance with all covenants as of September 30, 2016. The Company’s obligations under the senior credit facility are secured by substantially all of the assets of the Company other than intellectual property.

Description of Operations and17

Description of Operations and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
Description Of Operations And Summary Of Significant Accounting Policies [Abstract]
Deferred Offering Costs	Deferred Offering Costs Deferred offering costs of $3.6 million, consisting of legal, accounting and other fees and costs related to the IPO, were reclassified to additional paid-in capital as a reduction of the proceeds upon the closing of our IPO on September 28, 2016.
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 final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended, on September 23, 2016, or the Prospectus. The condensed consolidated balance sheet as of December 31, 2015, 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 2016 or any future period.
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include the Company and its wholly-owned subsidiaries. All significant 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, 2016, the Company has incurred losses from operations, and accumulated a deficit of $192.4 million, and has been dependent on equity and debt financing to fund operations.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In August 2016, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, No. 2016-15, Classification of Certain Cash Receipts and Cash Payments the Jump-start Our Business Start-ups Act, or In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes
New Accounting Pronouncements Not Yet Adopted	New Accounting Pronouncements Not Yet Adopted In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, 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), Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net), Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements – Going Concern (Subtopic 205-40),

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 and December 31, 2015, and indicates the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands): As of September 30, 2016 Level 1 Level 2 Level 3 Total Money market funds $ 82,485 $ — $ — $ 82,485 Corporate notes and obligations — 8,418 — 8,418 U.S. agency securities — 2,400 — 2,400 $ 82,485 $ 10,818 $ — $ 93,303 As of December 31, 2015 Level 1 Level 2 Level 3 Total Money market funds $ 8,015 $ — $ — $ 8,015 Corporate notes and obligations — 2,245 — 2,245 U.S. agency securities — 3,015 — 3,015 U.S. government treasury securities 1,000 — — 1,000 Preferred stock warrant liability — — (414 ) (414 ) $ 9,015 $ 5,260 $ (414 ) $ 13,861
Schedule of Reconciliation of Preferred Stock Warrant Liability Measured at Fair Value Using Significant Unobservable Inputs	The following Balance as of December 31, 2015 $ 414 Changes in fair value of underlying warrant securities, recorded to interest expense 202 Conversion of warrant, recorded to additional paid-in capital (616 ) Balance as of September 30, 2016 $ —

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 and December 31, 2015 were as follows (in thousands): As of September 30, 2016 Amortized Gross Unrealized Gross Unrealized Fair Cost Gains Losses Value Amounts maturing in one year or less Corporate notes and obligations $ 8,421 $ 1 $ (4 ) $ 8,418 U.S. agency securities 2,400 — — 2,400 Total available-for-sale debt securities $ 10,821 $ 1 $ (4 ) $ 10,818 As of December 31, 2015 Amortized Gross Unrealized Gross Unrealized Fair Cost Gains Losses Value Amounts maturing in one year or less Corporate notes and obligations $ 2,245 $ — $ — $ 2,245 U.S. agency securities 3,016 — (1 ) 3,015 U.S. government treasury securities 999 1 — 1,000 Total available-for-sale debt securities $ 6,260 $ 1 $ (1 ) $ 6,260

Equity Incentive Plans (Tables)

Equity Incentive Plans (Tables)	9 Months Ended
	Sep. 30, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Stock Option Activity Under 2007 Plan, 2011 Plan and 2016 Plan	Stock option activity under the 2007 Plan, 2011 Plan and the 2016 Plan during the nine months ended September 30, 2016 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, 2015 10,506 $ 8.51 7.49 $ 60,911 Options granted 2,063 14.31 Options exercised (222 ) 4.50 Options forfeited or canceled (815 ) 11.46 Outstanding at September 30, 2016 11,532 $ 9.42 7.22 $ 141,628 Vested and expected to vest - September 30, 2016 10,612 $ 9.09 7.08 $ 133,851 Exercisable - September 30, 2016 6,496 $ 6.23 5.87 $ 100,492
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 Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Cost of revenue Subscription $ 232 $ 145 $ 564 $ 341 Professional services 190 179 557 574 Research and development 698 577 1,965 1,737 Sales and marketing 735 623 2,176 1,833 General and administrative 632 498 1,640 1,392 Total stock-based compensation $ 2,487 $ 2,022 $ 6,902 $ 5,877

Net Loss Per Share Attributab21

Net Loss Per Share Attributable to Common Stockholders (Tables)	9 Months Ended
	Sep. 30, 2016
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 Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Numerator: Net loss attributable to common stockholders $ (8,755 ) $ (9,865 ) $ (23,636 ) $ (28,271 ) Denominator: Weighted-average common shares outstanding - basic and diluted 13,884 12,754 13,307 12,575 Net loss per common share, basic and diluted $ (0.63 ) $ (0.77 ) $ (1.78 ) $ (2.25 )
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 Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Options to purchase common shares 11,514 9,154 10,862 9,040 Common stock warrant 46 11 36 4 Convertible preferred shares (as converted) 17,645 18,240 18,040 18,240 Preferred stock warrant 26 27 27 27 29,231 27,432 28,965 27,311

Segments (Tables)

Segments (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 and 2015, as determined based on the billing address of the customer (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 North America $ 29,941 $ 25,327 $ 87,341 $ 74,105 Europe 9,066 5,512 24,259 15,889 APAC 1,620 1,415 4,649 4,415 $ 40,627 $ 32,254 $ 116,249 $ 94,409

Description of Operations and23

Description of Operations and Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Common stock, shares outstanding			12,897,001
Accumulated deficit	$ (192,407)	$ (192,407)	$ (168,771)
Debt extinguishment fee		$ 200
Class A Common Stock
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Net proceeds after deducting underwriting discounts and commissions and offering expenses	$ 99,100
Conversion ratio		100.00%
Common stock, shares outstanding	6,900,000	6,900,000
Class B Common Stock
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Conversion ratio	100.00%	100.00%
Common stock, shares outstanding	31,398,491	31,398,491
Common Stock Warrant | Class B Common Stock
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Conversion ratio	100.00%
Common Stock | Class B Common Stock
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Conversion ratio	100.00%
IPO
Description Of Operations And Summary Of Significant Accounting Policies [Line Items]
Deferred offering costs	$ 3,600	$ 3,600
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	$ 16

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, net asset (liability)	$ 93,303	$ 13,861
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, net asset (liability)	82,485	9,015
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, net asset (liability)	10,818	5,260
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, net asset (liability)		(414)
Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	82,485	8,015
Money Market Funds | Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	82,485	8,015
U.S. Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	2,400	3,015
U.S. Agency Securities | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	2,400	3,015
U.S. Government Treasury Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets		1,000
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		1,000
Corporate Notes and Obligations
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	8,418	2,245
Corporate Notes and Obligations | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, assets	$ 8,418	2,245
Preferred Stock Warrant Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, liability		(414)
Preferred Stock Warrant Liability | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair value, liability		$ (414)

Fair Value Measurements - Sch25

Fair Value Measurements - Schedule of Reconciliation of Preferred Stock Warrant Liability Measured at Fair Value Using Significant Unobservable Inputs (Details) - Preferred Stock Warrant Liability $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Balance as of December 31, 2015	$ 414
Changes in fair value of underlying warrant securities, recorded to interest expense	202
Conversion of warrant, recorded to additional paid-in capital	$ (616)

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, 2016	Dec. 31, 2015
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	$ 10,821	$ 6,260
Available-for-sale debt securities, Gross Unrealized Gains	1	1
Available-for-sale debt securities, Gross Unrealized Losses	(4)	(1)
Available-for-sale debt securities, Fair Value	10,818	6,260
Corporate Notes and Obligations
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	8,421	2,245
Available-for-sale debt securities, Gross Unrealized Gains	1
Available-for-sale debt securities, Gross Unrealized Losses	(4)
Available-for-sale debt securities, Fair Value	8,418	2,245
U.S. Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost	2,400	3,016
Available-for-sale debt securities, Gross Unrealized Losses		(1)
Available-for-sale debt securities, Fair Value	$ 2,400	3,015
U.S. Government Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale debt securities, Amortized Cost		999
Available-for-sale debt securities, Gross Unrealized Gains		1
Available-for-sale debt securities, Fair Value		$ 1,000

Investments - Additional Inform

Investments - Additional Information (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Available For Sale Securities [Abstract]
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

Warrants - Additional Informati

Warrants - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 26, 2016	Apr. 30, 2016	Apr. 20, 2016
Class Of Warrant Or Right [Line Items]
Fair value of warrant at the time of conversion	$ (202)	$ (57)
Class B Common Stock
Class Of Warrant Or Right [Line Items]
Common stock issued through cashless exercise of warrant			10,055
Class B Common Stock | Subordinated Loan And Security Agreement
Class Of Warrant Or Right [Line Items]
Warrants issued to purchase shares				21,208
Exercise price of warrant				$ 14.31
Class B Common Stock | Warrant Holder One
Class Of Warrant Or Right [Line Items]
Warrants issued to purchase shares			10,604
Common stock issued through cashless exercise of warrant			3,874
Warrant outstanding to purchase shares of common stock	10,604
Subordinated Loan And Security Agreement | Series A Convertible Preferred Stock
Class Of Warrant Or Right [Line Items]
Warrants issued to purchase shares	27,321
Exercise price of warrant	$ 1.37255
Subordinated Loan And Security Agreement | Class B Common Stock
Class Of Warrant Or Right [Line Items]
Warrants issued to purchase shares	27,321
Common stock issued through cashless exercise of warrant			25,658
Senior Credit Facility | Class B Common Stock | Term Loan Borrowings | Warrants Exercise Price at $13.99 | Silicon Valley Bank
Class Of Warrant Or Right [Line Items]
Warrants issued to purchase shares					21,444
Exercise price of warrant					$ 13.99
Senior Credit Facility | Class B Common Stock | Term Loan Borrowings | Warrants Exercise Price at $14.31 | Silicon Valley Bank
Class Of Warrant Or Right [Line Items]
Warrants issued to purchase shares					5,241
Exercise price of warrant					$ 14.31
Additional Paid-In Capital
Class Of Warrant Or Right [Line Items]
Fair value of warrant at the time of conversion	$ 600

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - $ / shares	1 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Class Of Stock [Line Items]
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares outstanding	0	0
Common stock, shares outstanding			12,897,001
Class B Common Stock
Class Of Stock [Line Items]
Convertible preferred stock converted into common stock	18,239,475	18,239,475
Conversion of convertible securities ratio	100.00%	100.00%
Common stock, shares authorized	44,000,000	44,000,000
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares issued	31,398,491	31,398,491
Common stock, shares outstanding	31,398,491	31,398,491
Common stock, entitled for voting rights		ten votes per share
Class A Common Stock
Class Of Stock [Line Items]
Conversion of convertible securities ratio		100.00%
Common stock, shares authorized	451,000,000	451,000,000
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares issued	6,900,000	6,900,000
Common stock, shares outstanding	6,900,000	6,900,000
Common stock, entitled for voting rights		one vote per share

Equity Incentive Plans - Additi

Equity Incentive Plans - Additional Information (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016USD ($)shares	Sep. 30, 2016USD ($)shares
2007 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	0	0
2011 Executive Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	0	0
2016 Equity Incentive Plan
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%
Equity incentive plan description		The total number of shares of Class A common stock reserved for issuance under the 2016 Plan is equal to (1) 3,800,000 shares plus (2) a number of shares of Class A common stock equal to the number of shares of Class B common stock subject to awards granted under the 2007 Plan and the 2011 Plan, or our Existing Plans, that, on or after September 22, 2016 expire or otherwise terminate without having been exercised in full, and a number of shares of Class A common stock equal to the number of shares of Class B common stock issued pursuant to awards granted under our Existing Plans that are forfeited to or repurchased by us, provided that the maximum number of shares of Class A common stock that may be added to the 2016 Plan pursuant to (2) is 11,663,388 shares.
2016 Equity Incentive Plan | Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	3,800,000	3,800,000
Automatically increase of shares reserved for issuance	5,500,000	5,500,000
2016 Equity Incentive Plan | Class A Common Stock | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	11,663,388	11,663,388
2016 Employee Stock Purchase Plan
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%
Unrecognized compensation cost | $	$ 23.2	$ 23.2
Weighted-average remaining expected term		3 years 15 days
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	750,000	750,000
Automatically increase of shares reserved for issuance	1,600,000	1,600,000
Purchase price of common stock, percent		85.00%
Number of shares purchased	0	0
2016 Employee Stock Purchase Plan | Class A Common Stock | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares purchase price discount rate		15.00%

Equity Incentive Plans - Summar

Equity Incentive Plans - Summary of Stock Option Activity Under 2007 Plan, 2011 Plan and 2016 Plan (Details) - Stock Option - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Options Outstanding
Outstanding at beginning of period	10,506,000
Options granted	2,063,000
Options exercised	(222,000)
Options forfeited or canceled	(815,000)
Outstanding at end of period	11,532,000	10,506,000
Vested and expected to vest at end of period	10,612,000
Exercisable at end of period	6,496,000
Weighted Average Exercise Price per Share
Outstanding at beginning of period	$ 8.51
Options granted	14.31
Options exercised	4.50
Options forfeited or canceled	11.46
Outstanding at end of period	9.42	$ 8.51
Vested and expected to vest at end of period	9.09
Exercisable at end of period	$ 6.23
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding	7 years 2 months 19 days	7 years 5 months 27 days
Vested and expected to vest at end of period	7 years 29 days
Exercisable at end of period	5 years 10 months 13 days
Outstanding at beginning of period	$ 141,628	$ 60,911
Vested and expected to vest at end of period	133,851
Exercisable at end of period	$ 100,492

Equity Incentive Plans - Summ32

Equity Incentive Plans - Summary of Stock Based Compensation Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock based compensation expense	$ 2,487	$ 2,022	$ 6,902	$ 5,877
Cost of Revenue Subscription
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock based compensation expense	232	145	564	341
Cost of Revenue Professional Services
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock based compensation expense	190	179	557	574
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock based compensation expense	698	577	1,965	1,737
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock based compensation expense	735	623	2,176	1,833
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock based compensation expense	$ 632	$ 498	$ 1,640	$ 1,392

Net Loss Per Share Attributab33

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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator:
Net loss attributable to common stockholders	$ (8,755)	$ (9,865)	$ (23,636)	$ (28,271)
Denominator:
Weighted-average common shares outstanding - basic and diluted	13,884	12,754	13,307	12,575
Net loss per common share, basic and diluted	$ (0.63)	$ (0.77)	$ (1.78)	$ (2.25)

Net Loss Per Share Attributab34

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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share	29,231	27,432	28,965	27,311
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	11,514	9,154	10,862	9,040
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	46	11	36	4
Preferred Stock Warrant
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share	26	27	27	27
Convertible Preferred Shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share	17,645	18,240	18,040	18,240

Segments - Additional Informati

Segments - Additional Information (Details) - Segment	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
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%	98.00%

Segments - Summary of Revenue b

Segments - Summary of Revenue by Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 40,627	$ 32,254	$ 116,249	$ 94,409
North America
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	29,941	25,327	87,341	74,105
Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	9,066	5,512	24,259	15,889
APAC
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 1,620	$ 1,415	$ 4,649	$ 4,415

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) $ in Millions	May 31, 2016ft²	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)
Commitments And Contingencies Disclosure [Abstract]
Total rent expense for operating leases | $		$ 1	$ 0.9	$ 2.8	$ 2.7
Amended additional office space lease | ft²	9,000

Credit Facilities - Additional

Credit Facilities - Additional Information (Details) - USD ($)	Sep. 28, 2016	Sep. 30, 2016	Apr. 20, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Line Of Credit Facility [Line Items]
Debt prepayment penalty and final payment fee		$ 200,000
Cash and cash equivalents		111,712,000		$ 17,256,000	$ 17,550,000	$ 19,686,000
Subordinated Loan And Security Agreement
Line Of Credit Facility [Line Items]
Debt prepayment penalty and final payment fee	$ 200,000
Repayments of loan agreement		0
Senior Credit Facility
Line Of Credit Facility [Line Items]
Repayment of senior credit facility	10,000,000
Unamortized debt issuance costs		$ 500,000
Credit facility, covenant terms		If the Company’s cash and cash equivalents, as defined in the senior credit facility, are below $25 million as of the last day of the applicable monthly measuring period, the Company will be required to comply with a financial covenant based on subscription and professional services bookings. This financial covenant is measured both monthly and quarterly, generally on a trailing six month basis.
Cash and cash equivalents		$ 25,000,000
Senior Credit Facility | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Term loan borrowings		$ 0		$ 0
Credit facility frequency of interest payments		monthly
Credit facility expiration date		Jun. 16, 2017
Senior Credit Facility | SVB and ORIX Ventures, LLC | Term Loan Borrowings
Line Of Credit Facility [Line Items]
Term loan borrowings			$ 20,000,000
Senior Credit Facility | Silicon Valley Bank | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Maximum borrowings capacity		$ 15,000,000
Subordinated Debt
Line Of Credit Facility [Line Items]
Repayment of subordinated loan	$ 10,000,000