Workiva (WK) 10-Q 9 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Nov. 07, 2016
Entity Information [Line Items]
Entity Registrant Name	WORKIVA INC
Entity Central Index Key	1,445,305
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Amendment Flag	false
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		30,248,470
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		10,966,888

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 42,842	$ 58,750
Marketable securities	10,995	17,420
Accounts receivable, net of allowance for doubtful accounts of $794 and $713 at September 30, 2016 and December 31, 2015, respectively	22,353	15,647
Deferred commissions	1,634	1,368
Other receivables	1,261	818
Prepaid expenses and other current assets	4,972	3,875
Total current assets	84,057	97,878
Property and equipment, net	43,287	44,410
Intangible assets, net	995	896
Other assets	1,583	711
Total assets	129,922	143,895
Current liabilities
Accounts payable	5,637	5,138
Accrued expenses and other current liabilities	17,177	20,394
Deferred revenue	63,629	55,741
Deferred government grant obligation	1,164	985
Current portion of capital lease and financing obligations	1,432	1,808
Current portion of long-term debt	20	18
Total current liabilities	89,059	84,084
Deferred revenue	15,216	7,597
Deferred government grant obligation	1,089	1,996
Other long-term liabilities	4,064	3,343
Capital lease and financing obligations	20,013	21,083
Long-term debt	53	73
Total liabilities	129,494	118,176
Stockholders’ equity
Preferred stock, $0.001 par value per share, 100,000,000 shares authorized, no shares issued and outstanding	0	0
Additional paid-in-capital	213,532	202,371
Accumulated deficit	(213,395)	(176,934)
Accumulated other comprehensive income	250	241
Total stockholders’ equity	428	25,719
Total liabilities and stockholders’ equity	129,922	143,895
Class A Common Stock
Stockholders’ equity
Common stock	30	29
Class B Common Stock
Stockholders’ equity
Common stock	$ 11	$ 12

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Allowance for doubtful accounts	$ 794	$ 713
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	30,218,473	29,014,665
Common stock, shares outstanding	30,218,473	29,014,665
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	10,990,888	11,933,784
Common stock, shares outstanding	10,990,888	11,933,784

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue
Subscription and support	$ 36,237	$ 29,832	$ 104,791	$ 84,186
Professional services	8,473	6,436	27,481	21,204
Total revenue	44,710	36,268	132,272	105,390
Cost of revenue
Subscription and support	6,694	5,319	20,651	16,768
Professional services	6,040	4,457	17,766	12,423
Total cost of revenue	12,734	9,776	38,417	29,191
Gross profit	31,976	26,492	93,855	76,199
Operating expenses
Research and development	14,342	12,766	42,905	36,970
Sales and marketing	22,354	20,903	62,270	50,937
General and administrative	8,015	7,153	24,850	20,178
Total operating expenses	44,711	40,822	130,025	108,085
Loss from operations	(12,735)	(14,330)	(36,170)	(31,886)
Interest expense	(462)	(494)	(1,420)	(1,517)
Other income and (expense), net	298	163	1,152	288
Loss before provision for income taxes	(12,899)	(14,661)	(36,438)	(33,115)
(Benefit) provision for income taxes	(8)	(31)	23	(9)
Net loss	$ (12,891)	$ (14,630)	$ (36,461)	$ (33,106)
Net loss per common share:
Basic and diluted (in dollars per share)	$ (0.32)	$ (0.37)	$ (0.90)	$ (0.83)
Weighted average common shares outstanding - basic and diluted (in shares)	40,762,960	39,980,308	40,603,430	39,735,393

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (12,891)	$ (14,630)	$ (36,461)	$ (33,106)
Other comprehensive (loss) income, net of tax
Foreign currency translation adjustment, net of income tax (expense) of $0 and ($40) for the three months ended September 30, 2016 and 2015, respectively, and net of income tax benefit (expense) of $21 and ($84) for the nine months ended September 30, 2016 and 2015, respectively	(4)	59	(37)	104
Unrealized (loss) gain on available-for-sale securities, net of income tax benefit of $5 and $0 for the three months ended September 30, 2016 and 2015, respectively, and net of income tax (expense) of ($28) and $0 for the nine months ended September 30, 2016 and 2015, respectively	(8)	4	46	4
Other comprehensive (loss) income, net of tax	(12)	63	9	108
Comprehensive loss	$ (12,903)	$ (14,567)	$ (36,452)	$ (32,998)

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustment, tax (expense) benefit	$ 0	$ (40)	$ 21	$ (84)
Unrealized gain on available-for-sale securities, tax benefit (expense)	$ 5	$ 0	$ (28)	$ 0

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net loss	$ (12,891)	$ (14,630)	$ (36,461)	$ (33,106)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities
Depreciation and amortization	944	1,058	2,916	3,354
Stock-based compensation expense	3,670	3,082	10,562	7,876
(Recovery of) provision for doubtful accounts	(92)	222	78	348
Realized gain on sale of available-for-sale securities	0	(7)	(6)	(7)
Amortization (accretion) of premiums and discounts on marketable securities, net	36	32	111	32
Recognition of deferred government grant obligation	(247)	(236)	(910)	(508)
Deferred income tax	5	0	(7)	0
Changes in assets and liabilities:
Accounts receivable	(4,009)	47	(6,734)	(1,448)
Deferred commissions	(135)	(217)	(264)	(104)
Other receivables	(365)	(44)	(447)	(656)
Prepaid expenses and other	415	(218)	(1,098)	(139)
Other assets	(455)	72	(841)	166
Accounts payable	279	857	380	2,276
Deferred revenue	13,228	1,686	15,412	3,528
Accrued expenses and other liabilities	2,410	3,578	(3,012)	1,732
Change in restricted cash	0	0	0	101
Net cash provided by (used in) operating activities	2,793	(4,718)	(20,321)	(16,555)
Cash flows from investing activities
Purchase of property and equipment	(91)	(629)	(1,100)	(1,659)
Purchase of marketable securities	0	(15,692)	(802)	(15,692)
Sale of marketable securities	0	3,012	7,197	3,012
Purchase of intangible assets	(38)	(66)	(152)	(344)
Net cash (used in) provided by investing activities	(129)	(13,375)	5,143	(14,683)
Cash flows from financing activities
Payment of equity issuance costs	0	0	0	(1,346)
Proceeds from option exercises	840	1,062	1,360	1,495
Taxes paid related to net share settlements of stock-based compensation awards	0	0	(761)	0
Changes in restricted cash	0	0	0	300
Repayment of other long-term debt	0	(17)	(18)	(84)
Principal payments on capital lease and financing obligations	(538)	(522)	(1,446)	(1,683)
Distributions to members	0	0	0	(35)
Proceeds from government grants	0	235	183	548
Payments of issuance costs on line of credit	0	0	(33)	0
Net cash provided by (used in) financing activities	302	758	(715)	(805)
Effect of foreign exchange rates on cash	(9)	(3)	(15)	6
Net increase (decrease) in cash and cash equivalents	2,957	(17,338)	(15,908)	(32,037)
Cash and cash equivalents at beginning of period	39,885	86,432	58,750	101,131
Cash and cash equivalents at end of period	42,842	69,094	42,842	69,094
Supplemental cash flow disclosure
Cash paid for interest	600	488	1,392	1,407
Cash paid for income taxes, net of refunds	(26)	0	22	0
Supplemental disclosure of noncash investing and financing activities
Fixed assets acquired through capital lease arrangements	0	0	0	527
Allowance for tenant improvements	80	0	481	698
Accrued distributions to members	0	0	0	60
Purchases of property and equipment, accrued but not paid	$ 505	$ 0	$ 505	$ 0

Organization and Significant Ac

Organization and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Significant Accounting Policies	Organization and Significant Accounting Policies Organization Workiva Inc., a Delaware corporation, and its wholly-owned subsidiaries created Wdesk, a cloud-based platform for enterprises to collect, link, report and analyze business data with control and accountability. The Wdesk proprietary word processing, spreadsheet and presentation applications are integrated and built upon a data management engine, offering synchronized data, controlled collaboration, granular permissions and a full audit trail. We offer our customers solutions in the areas of compliance, risk, finance, accounting, and audit management. Our operational headquarters are located in Ames, Iowa, with additional offices located in the United States, Europe and Canada. Basis of Presentation and Principles of Consolidation The financial information presented in the accompanying unaudited condensed consolidated financial statements has been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and in accordance with rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Accordingly, the financial statements do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The condensed consolidated balance sheet data as of December 31, 2015 was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. The condensed consolidated financial information 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, 2015 filed with the SEC on March 1, 2016 . In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments, consisting primarily of normal recurring accruals, necessary for a fair presentation of our financial position and results of operations. The operating results for the three and nine months ended September 30, 2016 are not necessarily indicative of the results expected for the full year ending December 31, 2016 . The unaudited condensed consolidated financial statements include the accounts of Workiva Inc. and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We base our estimates on historical experience and various other assumptions believed to be reasonable. These estimates include, but are not limited to, the determination of the relative selling prices of our services, health insurance claims incurred but not yet reported, collectability of accounts receivable, valuation of available-for-sale marketable securities, useful lives of intangible assets and property and equipment, income taxes and certain assumptions used in the valuation of equity awards. While these estimates are based on our best knowledge of current events and actions that may affect us in the future, actual results may differ materially from these estimates. New Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued guidance codified in Accounting Standards Codification (“ASC”) 606, Revenue Recognition - Revenue from Contracts with Customers , which amends the guidance in former ASC 605, Revenue Recognition . In August 2015, the FASB approved the deferral of the effective date of the standard by one year. The new guidance is effective for our fiscal year beginning January 1, 2018 instead of January 1, 2017 and permits the use of either a full retrospective or modified retrospective transition method. Entities are permitted to adopt the guidance in accordance with the original effective date if they choose. We plan to adopt this guidance on the effective date. We have not determined our transition method, and we are currently evaluating the impact the provisions of ASC 606 will have on our consolidated financial statements. In April 2015, the FASB issued Accounting Standards Update (“ASU”) 2015-05, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement . The amendments in this update provide guidance to customers about whether a cloud computing arrangement includes a software license. The amendment was effective for interim and annual periods beginning after December 15, 2015 with early adoption permitted. Effective January 1, 2016, we adopted this standard prospectively. The adoption did not have a material impact on our consolidated financial statements. In April 2015, the FASB issued ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs . The standard requires debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected. The standard became effective for interim and annual periods beginning after December 15, 2015. Effective January 1, 2016, we adopted this standard. The adoption did not have a material impact on our consolidated financial statements. In February 2016, the FASB issued guidance codified in ASC 842, Leases , which supersedes the guidance in former ASC 840, Leases , to increase transparency and comparability among organizations by requiring recognition of lease assets and lease liabilities on the balance sheet and disclosure of key information about leasing arrangements. The standard will become effective for interim and annual periods beginning after December 15, 2018, with early adoption permitted. The guidance is required to be adopted at the earliest period presented using a modified retrospective approach. We are currently evaluating the impact the provisions will have on our consolidated financial statements and whether we will adopt the guidance early. In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting

Supplemental Consolidated Balan

Supplemental Consolidated Balance Sheet and Statement of Operations Information	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplemental Consolidated Balance Sheet and Statement of Operations Information	Supplemental Consolidated Balance Sheet and Statement of Operations Information Other Assets Other assets consisted of (in thousands): September 30, 2016 December 31, 2015 Deposits and prepayments $ 1,166 $ 708 Refundable tax credits 330 — Other assets 87 3 $ 1,583 $ 711 Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consisted of (in thousands): September 30, 2016 December 31, 2015 Accrued vacation $ 4,336 $ 3,604 Accrued commissions 2,307 2,470 Accrued bonuses 6,421 9,598 Estimated health insurance claims 1,100 900 Accrued other liabilities 3,013 3,822 $ 17,177 $ 20,394 Other Income and (Expense), net Other income and (expense), net for the three and nine months ended September 30, 2016 and 2015 consisted of (in thousands): Three months ended September 30, Nine months ended September 30, 2016 2015 2016 2015 Interest income $ 64 $ 51 $ 209 $ 78 Income from training reimbursement program 247 236 910 508 Other (13 ) (124 ) 33 (298 ) $ 298 $ 163 $ 1,152 $ 288

Marketable Securities

Marketable Securities	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	Marketable Securities At September 30, 2016 , marketable securities consisted of the following (in thousands): Amortized Cost Unrealized Gains Unrealized Losses Aggregate Fair Value U.S. treasury debt securities $ 3,505 $ 1 $ — $ 3,506 U.S. corporate debt securities 7,478 12 (1 ) 7,489 Money market funds 37,455 — — 37,455 $ 48,438 $ 13 $ (1 ) $ 48,450 Included in cash and cash equivalents $ 37,455 $ — $ — $ 37,455 Included in marketable securities $ 10,983 $ 13 $ (1 ) $ 10,995 At December 31, 2015 , marketable securities consisted of the following (in thousands): Amortized Cost Unrealized Gains Unrealized Losses Aggregate Fair Value U.S. treasury debt securities $ 4,805 $ — $ (31 ) $ 4,774 U.S. corporate debt securities 12,679 1 (34 ) 12,646 Money market funds 53,365 — — 53,365 $ 70,849 $ 1 $ (65 ) $ 70,785 Included in cash and cash equivalents $ 53,365 $ — $ — $ 53,365 Included in marketable securities $ 17,484 $ 1 $ (65 ) $ 17,420 The following table presents gross unrealized losses and fair values for those marketable securities that were in an unrealized loss position as of September 30, 2016 , aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in thousands): As of September 30, 2016 Less than 12 months 12 months or greater Fair Value Unrealized Loss Fair Value Unrealized Loss U.S. corporate debt securities $ 2,042 $ (1 ) $ — $ — Total $ 2,042 $ (1 ) $ — $ — We do not believe any of the unrealized losses represented an other-than-temporary impairment based on our evaluation of available evidence, which includes our intent as of September 30, 2016

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements We determine the fair values of our financial instruments based on the fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value assumes that the transaction to sell the asset or transfer the liability occurs in the principal or most advantageous market for the asset or liability and establishes that the fair value of an asset or liability shall be determined based on the assumptions that market participants would use in pricing the asset or liability. The classification of a financial asset or liability within the hierarchy is based upon the lowest level input that is significant to the fair value measurement. The fair value hierarchy prioritizes the inputs into three levels that may be used to measure fair value: Level 1 - Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 - Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 - Inputs are unobservable inputs based on our assumptions. Financial Assets Cash equivalents primarily consist of AAA-rated money market funds with overnight liquidity and no stated maturities. We classified cash equivalents as Level 1 due to the short-term nature of these instruments and measured the fair value based on quoted prices in active markets for identical assets. When available, our marketable securities are valued using quoted prices for identical instruments in active markets. If we are unable to value our marketable securities using quoted prices for identical instruments in active markets, we value our investments using broker reports that utilize quoted market prices for comparable instruments. We validate, on a sample basis, the derived prices provided by the brokers by comparing their assessment of the fair values of our investments against the fair values of the portfolio balances of another third-party professional pricing service. As of September 30, 2016 , all of our marketable securities were valued using quoted prices for comparable instruments in active markets and are classified as Level 2. Based on our valuation of our money market funds and marketable securities, we concluded that they are classified in either Level 1 or Level 2 and we have no financial assets measured using Level 3 inputs. The following table presents information about our assets that are measured at fair value on a recurring basis using the above input categories (in thousands): Fair Value Measurements as of September 30, 2016 Fair Value Measurements as of December 31, 2015 Description Total Level 1 Level 2 Total Level 1 Level 2 Money market funds $ 37,455 $ 37,455 $ — $ 53,365 $ 53,365 $ — U.S. treasury debt securities 3,506 — 3,506 4,774 — 4,774 U.S. corporate debt securities 7,489 — 7,489 12,646 — 12,646 $ 48,450 $ 37,455 $ 10,995 $ 70,785 $ 53,365 $ 17,420 Included in cash and cash equivalents $ 37,455 $ 53,365 Included in marketable securities $ 10,995 $ 17,420 Other Fair Value Measurements At September 30, 2016 , the fair value of our debt obligations approximated the carrying amount of $73,000

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Lease Commitments As of September 30, 2016 , future estimated minimum lease payments under non-cancelable operating leases were as follows (in thousands): Operating Leases Remainder of 2016 $ 827 2017 3,477 2018 3,281 2019 2,581 2020 2,263 Thereafter 10,316 Total minimum lease payments $ 22,745 There have been no material changes in our future estimated minimum lease payments under non-cancelable capital and financing leases, as disclosed in our Annual Report on Form 10-K for the year ended December 31, 2015 . Litigation

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation We grant stock-based incentive awards to attract, motivate and retain qualified employees, non-employee directors and consultants, and to align their financial interests with those of our stockholders. We utilize stock-based compensation in the form of restricted stock awards, restricted stock units (together, “restricted stock”) and options to purchase Class A common stock. As of September 30, 2016 , awards outstanding under the 2009 Plan consisted of stock options, and awards outstanding under the 2014 Plan consisted of stock options, restricted stock awards and restricted stock units. In June 2016, stockholders approved an amendment to the 2014 Plan that increased the number of shares available for grant by 3,900,000 . As of September 30, 2016 , 4,173,014 shares of Class A common stock were available for grant under the 2014 Plan. Stock-based compensation expense for the nine months ended September 30, 2016 was $7.0 million and $3.6 million for options to purchase Class A common stock and restricted stock, respectively. Stock-based compensation expense for the nine months ended September 30, 2015 was $5.5 million and $2.4 million for options to purchase Class A common stock and restricted stock, respectively. Stock-based compensation expense associated with stock options and restricted stock was recorded in the following cost and expense categories consistent with the respective employee or service provider’s related cash compensation (in thousands): Three months ended September 30, Nine months ended September 30, 2016 2015 2016 2015 Cost of revenue Subscription and support $ 122 $ 92 $ 365 $ 275 Professional services 100 90 315 251 Operating expenses Research and development 594 586 1,787 1,289 Sales and marketing 567 461 1,471 1,243 General and administrative 2,287 1,853 6,624 4,818 Total $ 3,670 $ 3,082 $ 10,562 $ 7,876 The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model. Expected volatility is based on historical volatilities for publicly traded stock of comparable companies over the estimated expected life of the options. The expected term represents the period of time the options are expected to be outstanding and is based on the “simplified method” as defined by SEC Staff Accounting Bulletin No. 110 (Topic 14.D.2). We use the “simplified method” due to the lack of sufficient historical exercise data to provide a reasonable basis upon which to otherwise estimate the expected life of the options. The risk-free interest rate is based on yields on U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) with a maturity similar to the estimated expected term of the options. The fair value of our stock options was estimated assuming no expected dividends and the following weighted-average assumptions: Three months ended September 30, Nine months ended September 30, 2016 2015 2016 2015 Expected term (in years) 6.1 6.1 6.1 6.1 Risk-free interest rate 1.15% - 1.32% 1.70% - 1.93% 1.15% - 1.90% 1.35% - 1.93% Expected volatility 44.36% - 44.57% 46.09% - 47.07% 44.36% - 45.29% 42.35% - 47.07% Stock Options The following table summarizes the option activity under the Plans for the nine months ended September 30, 2016 : Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (in thousands) Outstanding at December 31, 2015 6,969,133 $ 11.37 7.7 $ 43,287 Granted 1,194,119 15.24 Forfeited (251,073 ) 14.58 Exercised (322,228 ) 4.22 Outstanding at September 30, 2016 7,589,951 $ 12.18 7.4 $ 45,209 Exercisable at September 30, 2016 4,107,422 $ 9.69 6.3 $ 34,677 Options to purchase Class A common stock generally vest over a three - or four -year period and are generally granted for a term of ten years . The total intrinsic value of options exercised during the nine months ended September 30, 2016 and 2015 was $3.4 million and $5.9 million , respectively. The weighted-average grant-date fair value of options granted during the nine months ended September 30, 2016 and 2015 was $6.78 and $6.31 , respectively. The total fair value of options vested during the nine months ended September 30, 2016 and 2015 was approximately $6.9 million and $6.8 million , respectively. Total unrecognized compensation expense of $20.4 million related to options will be recognized over a weighted-average period of 2.5 years. Restricted Stock We have granted restricted stock awards and restricted stock units to our executive officers that vest in three equal annual installments from the date of grant and restricted stock awards and restricted stock units to non-employee members of our Board of Directors with one -year cliff vesting from the date of grant. The fair value for restricted stock awards and units is calculated based on the stock price on the date of grant. The total fair value of restricted stock awards and units vested during the nine months ended September 30, 2016 was approximately $3.3 million . No restricted stock awards or units vested during the nine months ended September 30, 2015 . The following table summarizes the restricted stock activity under the Plan for the nine months ended September 30, 2016 : Number of Shares Weighted- Aggregate Intrinsic Value (in thousands) Outstanding at December 31, 2015 600,025 $ 13.38 $ 10,542 Granted 381,952 15.11 Forfeited — — Vested (246,690 ) 13.35 Outstanding at September 30, 2016 735,287 $ 14.29 $ 13,331 Compensation expense associated with unvested restricted stock is recognized on a straight-line basis over the vesting period. The expense recognized each period is dependent upon our estimate of the number of shares that will ultimately be issued. At September 30, 2016 , there was approximately $7.6 million of total unrecognized compensation expense related to restricted stock, which is expected to be recognized over a weighted-average period of 1.8

Net Loss Per Share

Net Loss Per Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share Basic net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by giving effect to all potential shares of common stock, including our outstanding stock options and stock related to unvested restricted stock awards to the extent dilutive. The net loss per share is allocated based on the participation rights of the Class A and Class B common shares as if the loss for the year has been distributed. As the liquidation and dividend rights are identical, the net loss is allocated on a proportionate basis. We consider unvested restricted stock awards granted under the 2014 Equity Incentive Plan to be participating securities because holders of such shares have non-forfeitable dividend rights in the event of our declaration of a dividend for common shares. In future periods to the extent we are profitable, we will subtract earnings allocated to these participating securities from net income to determine net income attributable to common stockholders. A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands, except share and per share data): Three months ended September 30, 2016 September 30, 2015 Class A Class B Class A Class B Numerator Net loss $ (9,369 ) $ (3,522 ) $ (10,199 ) $ (4,431 ) Denominator Weighted-average common shares outstanding - basic and diluted 29,624,794 11,138,166 27,870,414 12,109,894 Basic and diluted net loss per share $ (0.32 ) $ (0.32 ) $ (0.37 ) $ (0.37 ) Nine months ended September 30, 2016 September 30, 2015 Class A Class B Class A Class B Numerator Net loss $ (26,076 ) $ (10,385 ) $ (22,849 ) $ (10,257 ) Denominator Weighted-average common shares outstanding - basic and diluted 29,038,566 11,564,864 27,423,991 12,311,402 Basic and diluted net loss per share $ (0.90 ) $ (0.90 ) $ (0.83 ) $ (0.83 ) The anti-dilutive securities excluded from the weighted-average shares used to calculate the diluted net loss per common share were as follows: As of September 30, 2016 September 30, 2015 Shares subject to outstanding common stock options 7,589,951 6,945,857 Shares subject to unvested restricted stock awards 353,335 654,375

Organization and Significant 15

Organization and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Principles of Consolidation	The financial information presented in the accompanying unaudited condensed consolidated financial statements has been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and in accordance with rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Accordingly, the financial statements do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The condensed consolidated balance sheet data as of December 31, 2015 was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. The condensed consolidated financial information 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, 2015 filed with the SEC on March 1, 2016 . In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments, consisting primarily of normal recurring accruals, necessary for a fair presentation of our financial position and results of operations. The operating results for the three and nine months ended September 30, 2016 are not necessarily indicative of the results expected for the full year ending December 31, 2016
Use of Estimates	The preparation of consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We base our estimates on historical experience and various other assumptions believed to be reasonable. These estimates include, but are not limited to, the determination of the relative selling prices of our services, health insurance claims incurred but not yet reported, collectability of accounts receivable, valuation of available-for-sale marketable securities, useful lives of intangible assets and property and equipment, income taxes and certain assumptions used in the valuation of equity awards. While these estimates are based on our best knowledge of current events and actions that may affect us in the future, actual results may differ materially from these estimates.
New Accounting Pronouncements	In May 2014, the Financial Accounting Standards Board (“FASB”) issued guidance codified in Accounting Standards Codification (“ASC”) 606, Revenue Recognition - Revenue from Contracts with Customers , which amends the guidance in former ASC 605, Revenue Recognition . In August 2015, the FASB approved the deferral of the effective date of the standard by one year. The new guidance is effective for our fiscal year beginning January 1, 2018 instead of January 1, 2017 and permits the use of either a full retrospective or modified retrospective transition method. Entities are permitted to adopt the guidance in accordance with the original effective date if they choose. We plan to adopt this guidance on the effective date. We have not determined our transition method, and we are currently evaluating the impact the provisions of ASC 606 will have on our consolidated financial statements. In April 2015, the FASB issued Accounting Standards Update (“ASU”) 2015-05, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement . The amendments in this update provide guidance to customers about whether a cloud computing arrangement includes a software license. The amendment was effective for interim and annual periods beginning after December 15, 2015 with early adoption permitted. Effective January 1, 2016, we adopted this standard prospectively. The adoption did not have a material impact on our consolidated financial statements. In April 2015, the FASB issued ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs . The standard requires debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected. The standard became effective for interim and annual periods beginning after December 15, 2015. Effective January 1, 2016, we adopted this standard. The adoption did not have a material impact on our consolidated financial statements. In February 2016, the FASB issued guidance codified in ASC 842, Leases , which supersedes the guidance in former ASC 840, Leases , to increase transparency and comparability among organizations by requiring recognition of lease assets and lease liabilities on the balance sheet and disclosure of key information about leasing arrangements. The standard will become effective for interim and annual periods beginning after December 15, 2018, with early adoption permitted. The guidance is required to be adopted at the earliest period presented using a modified retrospective approach. We are currently evaluating the impact the provisions will have on our consolidated financial statements and whether we will adopt the guidance early. In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting
Fair Value of Financial Instruments	Cash equivalents primarily consist of AAA-rated money market funds with overnight liquidity and no stated maturities. We classified cash equivalents as Level 1 due to the short-term nature of these instruments and measured the fair value based on quoted prices in active markets for identical assets. When available, our marketable securities are valued using quoted prices for identical instruments in active markets. If we are unable to value our marketable securities using quoted prices for identical instruments in active markets, we value our investments using broker reports that utilize quoted market prices for comparable instruments. We validate, on a sample basis, the derived prices provided by the brokers by comparing their assessment of the fair values of our investments against the fair values of the portfolio balances of another third-party professional pricing service.
Share-based Compensation	The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model. Expected volatility is based on historical volatilities for publicly traded stock of comparable companies over the estimated expected life of the options. The expected term represents the period of time the options are expected to be outstanding and is based on the “simplified method” as defined by SEC Staff Accounting Bulletin No. 110 (Topic 14.D.2). We use the “simplified method” due to the lack of sufficient historical exercise data to provide a reasonable basis upon which to otherwise estimate the expected life of the options. The risk-free interest rate is based on yields on U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities) with a maturity similar to the estimated expected term of the options.

Supplemental Consolidated Bal16

Supplemental Consolidated Balance Sheet and Statement of Operations Information (Tables)	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Other Assets	Other assets consisted of (in thousands): September 30, 2016 December 31, 2015 Deposits and prepayments $ 1,166 $ 708 Refundable tax credits 330 — Other assets 87 3 $ 1,583 $ 711
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities consisted of (in thousands): September 30, 2016 December 31, 2015 Accrued vacation $ 4,336 $ 3,604 Accrued commissions 2,307 2,470 Accrued bonuses 6,421 9,598 Estimated health insurance claims 1,100 900 Accrued other liabilities 3,013 3,822 $ 17,177 $ 20,394
Schedule of Other Income and (Expense), net	Other income and (expense), net for the three and nine months ended September 30, 2016 and 2015 consisted of (in thousands): Three months ended September 30, Nine months ended September 30, 2016 2015 2016 2015 Interest income $ 64 $ 51 $ 209 $ 78 Income from training reimbursement program 247 236 910 508 Other (13 ) (124 ) 33 (298 ) $ 298 $ 163 $ 1,152 $ 288

Marketable Securities (Tables)

Marketable Securities (Tables)	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Schedule of Marketable Securities	At September 30, 2016 , marketable securities consisted of the following (in thousands): Amortized Cost Unrealized Gains Unrealized Losses Aggregate Fair Value U.S. treasury debt securities $ 3,505 $ 1 $ — $ 3,506 U.S. corporate debt securities 7,478 12 (1 ) 7,489 Money market funds 37,455 — — 37,455 $ 48,438 $ 13 $ (1 ) $ 48,450 Included in cash and cash equivalents $ 37,455 $ — $ — $ 37,455 Included in marketable securities $ 10,983 $ 13 $ (1 ) $ 10,995 At December 31, 2015 , marketable securities consisted of the following (in thousands): Amortized Cost Unrealized Gains Unrealized Losses Aggregate Fair Value U.S. treasury debt securities $ 4,805 $ — $ (31 ) $ 4,774 U.S. corporate debt securities 12,679 1 (34 ) 12,646 Money market funds 53,365 — — 53,365 $ 70,849 $ 1 $ (65 ) $ 70,785 Included in cash and cash equivalents $ 53,365 $ — $ — $ 53,365 Included in marketable securities $ 17,484 $ 1 $ (65 ) $ 17,420
Schedule of Cash and Cash Equivalents	At September 30, 2016 , marketable securities consisted of the following (in thousands): Amortized Cost Unrealized Gains Unrealized Losses Aggregate Fair Value U.S. treasury debt securities $ 3,505 $ 1 $ — $ 3,506 U.S. corporate debt securities 7,478 12 (1 ) 7,489 Money market funds 37,455 — — 37,455 $ 48,438 $ 13 $ (1 ) $ 48,450 Included in cash and cash equivalents $ 37,455 $ — $ — $ 37,455 Included in marketable securities $ 10,983 $ 13 $ (1 ) $ 10,995 At December 31, 2015 , marketable securities consisted of the following (in thousands): Amortized Cost Unrealized Gains Unrealized Losses Aggregate Fair Value U.S. treasury debt securities $ 4,805 $ — $ (31 ) $ 4,774 U.S. corporate debt securities 12,679 1 (34 ) 12,646 Money market funds 53,365 — — 53,365 $ 70,849 $ 1 $ (65 ) $ 70,785 Included in cash and cash equivalents $ 53,365 $ — $ — $ 53,365 Included in marketable securities $ 17,484 $ 1 $ (65 ) $ 17,420
Schedule of Available-for-sale Securities, Continuous Unrealized Loss Position	The following table presents gross unrealized losses and fair values for those marketable securities that were in an unrealized loss position as of September 30, 2016 , aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in thousands): As of September 30, 2016 Less than 12 months 12 months or greater Fair Value Unrealized Loss Fair Value Unrealized Loss U.S. corporate debt securities $ 2,042 $ (1 ) $ — $ — Total $ 2,042 $ (1 ) $ — $ —

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Schedule of Assets Measured on Recurring Basis	The following table presents information about our assets that are measured at fair value on a recurring basis using the above input categories (in thousands): Fair Value Measurements as of September 30, 2016 Fair Value Measurements as of December 31, 2015 Description Total Level 1 Level 2 Total Level 1 Level 2 Money market funds $ 37,455 $ 37,455 $ — $ 53,365 $ 53,365 $ — U.S. treasury debt securities 3,506 — 3,506 4,774 — 4,774 U.S. corporate debt securities 7,489 — 7,489 12,646 — 12,646 $ 48,450 $ 37,455 $ 10,995 $ 70,785 $ 53,365 $ 17,420 Included in cash and cash equivalents $ 37,455 $ 53,365 Included in marketable securities $ 10,995 $ 17,420

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments	As of September 30, 2016 , future estimated minimum lease payments under non-cancelable operating leases were as follows (in thousands): Operating Leases Remainder of 2016 $ 827 2017 3,477 2018 3,281 2019 2,581 2020 2,263 Thereafter 10,316 Total minimum lease payments $ 22,745

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock-based Compensation Expense	Stock-based compensation expense associated with stock options and restricted stock was recorded in the following cost and expense categories consistent with the respective employee or service provider’s related cash compensation (in thousands): Three months ended September 30, Nine months ended September 30, 2016 2015 2016 2015 Cost of revenue Subscription and support $ 122 $ 92 $ 365 $ 275 Professional services 100 90 315 251 Operating expenses Research and development 594 586 1,787 1,289 Sales and marketing 567 461 1,471 1,243 General and administrative 2,287 1,853 6,624 4,818 Total $ 3,670 $ 3,082 $ 10,562 $ 7,876
Schedule of Share-based Payment Award, Valuation Assumptions	The fair value of our stock options was estimated assuming no expected dividends and the following weighted-average assumptions: Three months ended September 30, Nine months ended September 30, 2016 2015 2016 2015 Expected term (in years) 6.1 6.1 6.1 6.1 Risk-free interest rate 1.15% - 1.32% 1.70% - 1.93% 1.15% - 1.90% 1.35% - 1.93% Expected volatility 44.36% - 44.57% 46.09% - 47.07% 44.36% - 45.29% 42.35% - 47.07%
Schedule of Stock-Option Activity	The following table summarizes the option activity under the Plans for the nine months ended September 30, 2016 : Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (in thousands) Outstanding at December 31, 2015 6,969,133 $ 11.37 7.7 $ 43,287 Granted 1,194,119 15.24 Forfeited (251,073 ) 14.58 Exercised (322,228 ) 4.22 Outstanding at September 30, 2016 7,589,951 $ 12.18 7.4 $ 45,209 Exercisable at September 30, 2016 4,107,422 $ 9.69 6.3 $ 34,677
Schedule of Restricted Stock Activity	The following table summarizes the restricted stock activity under the Plan for the nine months ended September 30, 2016 : Number of Shares Weighted- Aggregate Intrinsic Value (in thousands) Outstanding at December 31, 2015 600,025 $ 13.38 $ 10,542 Granted 381,952 15.11 Forfeited — — Vested (246,690 ) 13.35 Outstanding at September 30, 2016 735,287 $ 14.29 $ 13,331

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands, except share and per share data): Three months ended September 30, 2016 September 30, 2015 Class A Class B Class A Class B Numerator Net loss $ (9,369 ) $ (3,522 ) $ (10,199 ) $ (4,431 ) Denominator Weighted-average common shares outstanding - basic and diluted 29,624,794 11,138,166 27,870,414 12,109,894 Basic and diluted net loss per share $ (0.32 ) $ (0.32 ) $ (0.37 ) $ (0.37 ) Nine months ended September 30, 2016 September 30, 2015 Class A Class B Class A Class B Numerator Net loss $ (26,076 ) $ (10,385 ) $ (22,849 ) $ (10,257 ) Denominator Weighted-average common shares outstanding - basic and diluted 29,038,566 11,564,864 27,423,991 12,311,402 Basic and diluted net loss per share $ (0.90 ) $ (0.90 ) $ (0.83 ) $ (0.83 )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The anti-dilutive securities excluded from the weighted-average shares used to calculate the diluted net loss per common share were as follows: As of September 30, 2016 September 30, 2015 Shares subject to outstanding common stock options 7,589,951 6,945,857 Shares subject to unvested restricted stock awards 353,335 654,375

Supplemental Consolidated Bal22

Supplemental Consolidated Balance Sheet and Statement of Operations Information - Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other Assets, Noncurrent [Abstract]
Deposits and prepayments	$ 1,166	$ 708
Refundable tax credits	330	0
Other assets	87	3
Total Other Assets	$ 1,583	$ 711

Supplemental Consolidated Bal23

Supplemental Consolidated Balance Sheet and Statement of Operations Information - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accrued Liabilities and Other Liabilities [Abstract]
Accrued vacation	$ 4,336	$ 3,604
Accrued commissions	2,307	2,470
Accrued bonuses	6,421	9,598
Estimated health insurance claims	1,100	900
Accrued other liabilities	3,013	3,822
Accrued expenses and other current liabilities	$ 17,177	$ 20,394

Supplemental Consolidated Bal24

Supplemental Consolidated Balance Sheet and Statement of Operations Information - Other Income and (Expense), Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Nonoperating Income (Expense) [Abstract]
Interest income	$ 64	$ 51	$ 209	$ 78
Income from training reimbursement program	247	236	910	508
Other	(13)	(124)	33	(298)
Nonoperating income (expense)	$ 298	$ 163	$ 1,152	$ 288

Marketable Securities - Schedul

Marketable Securities - Schedule of Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 42,842	$ 39,885	$ 58,750	$ 69,094	$ 86,432	$ 101,131
Schedule of Available-for-sale Securities [Line Items]
Unrealized Gains	13		1
Unrealized Losses	(1)		(65)
Cash and cash equivalents and available-for-sale securities, amortized cost	48,438		70,849
Cash and cash equivalents and available-for-sale securities	48,450		70,785
U. S. treasury debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,505		4,805
Unrealized Gains	1		0
Unrealized Losses	0		(31)
Aggregate Fair Value	3,506		4,774
U.S. corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,478		12,679
Unrealized Gains	12		1
Unrealized Losses	(1)		(34)
Aggregate Fair Value	7,489		12,646
Money market funds
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	37,455		53,365
Cash and cash equivalents, aggregate fair value	37,455		53,365
Cash and cash equivalents | Money market funds
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	37,455		53,365
Cash and cash equivalents, aggregate fair value	37,455		53,365
Marketable securities | U.S. corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,983		17,484
Unrealized Gains	13		1
Unrealized Losses	(1)		(65)
Aggregate Fair Value	$ 10,995		$ 17,420

Marketable Securities - Continu

Marketable Securities - Continuous Unrealized Loss Position (Details) $ in Thousands	Sep. 30, 2016USD ($)
Fair Value
Less than 12 months	$ 2,042
12 months or greater	0
Unrealized Loss
Less than 12 months	(1)
12 months or greater	0
U.S. corporate debt securities
Fair Value
Less than 12 months	2,042
12 months or greater	0
Unrealized Loss
Less than 12 months	(1)
12 months or greater	$ 0

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
U. S. treasury debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities - domestic debt securities	$ 3,506	$ 4,774
U.S. corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities - domestic debt securities	7,489	12,646
U.S. corporate debt securities | Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities - domestic debt securities	10,995	17,420
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	37,455	53,365
Money market funds | Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	37,455	53,365
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt fair value	73
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	48,450	70,785
Recurring | Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	37,455	53,365
Recurring | Marketable securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities - domestic debt securities	10,995	17,420
Recurring | U. S. treasury debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities - domestic debt securities	3,506	4,774
Recurring | U.S. corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities - domestic debt securities	7,489	12,646
Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	37,455	53,365
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	37,455	53,365
Recurring | Level 1 | U. S. treasury debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities - domestic debt securities	0	0
Recurring | Level 1 | U.S. corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities - domestic debt securities	0	0
Recurring | Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	37,455	53,365
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	10,995	17,420
Recurring | Level 2 | U. S. treasury debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities - domestic debt securities	3,506	4,774
Recurring | Level 2 | U.S. corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities - domestic debt securities	7,489	12,646
Recurring | Level 2 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents - money market funds	$ 0	$ 0

Commitments and Contingencies -

Commitments and Contingencies - Future Minimum Lease Payments (Details) $ in Thousands	Sep. 30, 2016USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Remainder of 2016	$ 827
2,017	3,477
2,018	3,281
2,019	2,581
2,020	2,263
Thereafter	10,316
Total minimum lease payments	$ 22,745

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 3,670	$ 3,082	$ 10,562	$ 7,876
Employee and Nonemployee Stock Options | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense				7,000	5,500
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense				$ 3,600	$ 2,400
2014 Equity Incentive Plan | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized	3,900,000
Number of shares available for grant		4,173,014		4,173,014

Stock-Based Compensation - Expe

Stock-Based Compensation - Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 3,670	$ 3,082	$ 10,562	$ 7,876
Subscription and support
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	122	92	365	275
Professional services
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	100	90	315	251
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	594	586	1,787	1,289
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	567	461	1,471	1,243
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 2,287	$ 1,853	$ 6,624	$ 4,818

Stock-Based Compensation - Assu

Stock-Based Compensation - Assumptions (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term (in years)	6 years 1 month 6 days	6 years 1 month 6 days	6 years 1 month 10 days	6 years 1 month 6 days
Risk-free interest rate, min (as percent)	1.15%	1.70%	1.15%	1.35%
Risk-free interest rate, max (as percent)	1.32%	1.93%	1.90%	1.93%
Expected volatility, min (as percent)	44.36%	46.09%	44.36%	42.35%
Expected volatility, max (as percent)	44.57%	47.07%	45.29%	47.07%

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Options (in shares):
Outstanding beginning of the period (in shares)	6,969,133
Granted (in shares)	1,194,119
Forfeited (in shares)	(251,073)
Exercised (in shares)	(322,228)
Outstanding end of the period (in shares)	7,589,951		6,969,133
Exercisable at end of the period (in shares)	4,107,422
Weighted-Average Exercise Price (in dollars per share):
Outstanding beginning of the period (in dollars per share)	$ 11.37
Granted (in dollars per share)	15.24
Forfeited (in dollars per share)	14.58
Exercised (in dollars per share)	4.22
Outstanding end of the period (in dollars per share)	12.18		$ 11.37
Exercisable at the end of the period (in dollars per share)	$ 9.69
Outstanding, weighted-average remaining contractual term (years)	7 years 4 months 24 days		7 years 8 months 12 days
Exercisable, weighted-average remaining contractual term (years)	6 years 3 months 18 days
Outstanding, aggregate intrinsic value	$ 45,209		$ 43,287
Exercisable, aggregate intrinsic value	34,677
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options exercised intrinsic value	$ 3,400	$ 5,900
Options grants in period, weighted average grant date fair value (in dollars per share)	$ 6.78	$ 6.31
Options vested in period fair value	$ 6,900	$ 6,800
Employee and Nonemployee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options unrecognized compensation expense	$ 20,400
Options unrecognized compensation expense, period for recognition (years)	2 years 6 months
Class A Common Stock | Employee and Nonemployee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Expiration period (years)	10 years
Minimum | Class A Common Stock | Employee and Nonemployee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Award vesting period (years)	3 years
Maximum | Class A Common Stock | Employee and Nonemployee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Award vesting period (years)	4 years

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock (Details) - Restricted Stock - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested in period, fair value	$ 3,300
Vested in period (in shares)	246,690	0
Number of Shares (in shares)
Outstanding at beginning of period (in shares)	600,025
Granted (in shares)	381,952
Forfeited (in shares)	0
Vested (in shares)	(246,690)	0
Outstanding at end of period (in shares)	735,287
Weighted- Average Grant Date Fair Value (in dollars per share)
Outstanding at beginning of period (in dollars per share)	$ 13.38
Granted (in dollars per share)	15.11
Forfeited (in dollars per share)	0
Vested (in dollars per share)	13.35
Outstanding at end of period (in dollars per share)	$ 14.29
Aggregate intrinsic value	$ 13,331		$ 10,542
Unrecognized compensation expense	$ 7,600
Unrecognized compensation expense, period for recognition (years)	1 year 9 months 18 days
Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	3 years
Non-employee Members, Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	1 year

Net Loss Per Share - Earnings P

Net Loss Per Share - Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Class of Stock [Line Items]
Net loss	$ (12,891)	$ (14,630)	$ (36,461)	$ (33,106)
Weighted-average common shares outstanding - basic and diluted (in shares)	40,762,960	39,980,308	40,603,430	39,735,393
Basic and diluted net loss per share (in dollars per share)	$ (0.32)	$ (0.37)	$ (0.90)	$ (0.83)
Class A Common Stock
Class of Stock [Line Items]
Net loss	$ (9,369)	$ (10,199)	$ (26,076)	$ (22,849)
Weighted-average common shares outstanding - basic and diluted (in shares)	29,624,794	27,870,414	29,038,566	27,423,991
Basic and diluted net loss per share (in dollars per share)	$ (0.32)	$ (0.37)	$ (0.90)	$ (0.83)
Class B Common Stock
Class of Stock [Line Items]
Net loss	$ (3,522)	$ (4,431)	$ (10,385)	$ (10,257)
Weighted-average common shares outstanding - basic and diluted (in shares)	11,138,166	12,109,894	11,564,864	12,311,402
Basic and diluted net loss per share (in dollars per share)	$ (0.32)	$ (0.37)	$ (0.90)	$ (0.83)

Net Loss Per Share - Antidiluti

Net Loss Per Share - Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Shares subject to outstanding common stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	7,589,951	6,945,857
Shares subject to unvested restricted stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	353,335	654,375