Alteryx Inc - Ordinary Shares (AYX) 10-Q 9 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 03, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	AYX
Entity Registrant Name	Alteryx, Inc.
Entity Central Index Key	1,689,923
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Class A Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		23,921,917
Class B Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		35,244,315

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue	$ 34,155	$ 22,462	$ 93,019	$ 60,828
Cost of revenue	5,425	4,062	15,545	11,727
Gross profit	28,730	18,400	77,474	49,101
Operating expenses:
Research and development	7,774	4,496	20,943	12,419
Sales and marketing	15,514	13,456	48,731	42,530
General and administrative	8,005	4,298	24,115	11,623
Total operating expenses	31,293	22,250	93,789	66,572
Loss from operations	(2,563)	(3,850)	(16,315)	(17,471)
Other expense, net	(711)	(284)	(277)	(562)
Loss before provision for (benefit of) income taxes	(3,274)	(4,134)	(16,592)	(18,033)
Provisions for (benefit of) income taxes	25	58	(632)	148
Net loss	(3,299)	(4,192)	(15,960)	(18,181)
Less: Accretion of Series A redeemable convertible preferred stock		(1,733)	(1,983)	(4,466)
Net loss attributable to common stockholders	$ (3,299)	$ (5,925)	$ (17,943)	$ (22,647)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.06)	$ (0.18)	$ (0.35)	$ (0.70)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted	58,942	32,538	50,864	32,390
Net loss	$ (3,299)	$ (4,192)	$ (15,960)	$ (18,181)
Other comprehensive income (loss), net of tax:
Net unrealized holding gain (loss) on investments, net of tax	(15)	(9)	(101)	75
Foreign currency translation adjustments, net of tax	(40)		(148)
Other comprehensive income (loss), net of tax	(55)	(9)	(249)	75
Total comprehensive loss	$ (3,354)	$ (4,201)	$ (16,209)	$ (18,106)

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 95,776	$ 31,306
Short-term investments	60,812	21,394
Accounts receivable, net	30,820	35,367
Deferred commissions	6,700	7,358
Prepaid expenses and other current assets	6,211	5,013
Total current assets	200,319	100,438
Property and equipment, net	6,913	6,212
Long-term investments	25,989
Goodwill	8,741
Intangible assets, net	8,456
Other assets	3,928	4,765
Total assets	254,346	111,415
Current liabilities:
Accounts payable	4,014	1,780
Accrued payroll and payroll related liabilities	6,108	7,760
Accrued expenses and other current liabilities	8,063	4,987
Deferred revenue	78,656	71,050
Total current liabilities	96,841	85,577
Deferred revenue	3,522	3,084
Other liabilities	2,531	1,182
Total liabilities	102,894	89,843
Commitments and contingencies (Note 8)
Redeemable convertible preferred stock, $0.0001 par value: no shares and 14,899 shares authorized as of September 30, 2017 and December 31, 2016, respectively; no shares and 14,647 shares issued and outstanding as of September 30, 2017 and December 31, 2016, respectively; aggregate liquidation preference of $0 and $87,448 as of September 30, 2017 and December 31, 2016, respectively		99,182
Stockholders' equity (deficit):
Preferred stock, $0.0001 par value: 10,000 and no shares authorized as of September 30, 2017 and December 31, 2016, respectively; no shares issued and outstanding as of September 30, 2017 and December 31, 2016
Common stock, $0.0001 par value: 1,000,000 and 56,025 shares authorized as of September 30, 2017 and December 31, 2016, respectively; 59,142 and 32,674 shares issued and outstanding as of September 30, 2017 and December 31, 2016, respectively	5	3
Additional paid-in capital	253,712	8,443
Accumulated deficit	(102,007)	(86,047)
Accumulated other comprehensive loss	(258)	(9)
Total stockholders' equity (deficit)	151,452	(77,610)
Total liabilities, redeemable convertible preferred stock, and stockholders' equity (deficit)	$ 254,346	$ 111,415

Condensed Consolidated Balance4

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Redeemable convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Redeemable convertible preferred stock, shares authorized (in shares)	0	14,899
Redeemable convertible preferred stock, shares issued (in shares)	0	14,647
Redeemable convertible preferred stock, shares outstanding (in shares)	0	14,647
Redeemable convertible preferred stock, aggregate liquidation preference	$ 0	$ 87,448
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	10,000	0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock par value per share (in dollars per share)	$ 0.0001	$ 0.0001
Common stock shares authorized (in shares)	1,000,000	56,025
Common Stock shares issued (in shares)	59,142	32,674
Common stock shares outstanding (in shares)	59,142	32,674

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Deficit - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Redeemable Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2016	$ (77,610)		$ 3	$ 8,443	$ (86,047)	$ (9)
Beginning Balance at Dec. 31, 2016	$ 99,182	$ 99,182
Beginning Balance, Shares at Dec. 31, 2016	32,674,000		32,674,000
Beginning Balance, Shares at Dec. 31, 2016	14,647,000	14,647,000
Issuance of common stock, net of issuance costs	$ 131,413		$ 1	131,412
Accretion of Series A redeemable convertible preferred stock issuance costs and redemption feature		$ 1,983
Issuance of stock, net of issuance costs, shares			10,350,000
Accretion of Series A redeemable convertible preferred stock issuance costs and redemption feature	(1,983)			(1,983)
Conversion of redeemable convertible preferred stock to common stock	101,165	$ (101,165)	$ 1	101,164
Conversion of redeemable convertible preferred stock to common stock, shares		(14,647,000)	14,647,000
Equity issued in business combination	$ 5,285			5,285
Ending Balance at Sep. 30, 2017		$ 0
Equity issued in business combination, shares			265,000
Ending Balance, Shares at Sep. 30, 2017	0
Shares issued pursuant to stock awards	$ 2,562			2,562
Shares issued pursuant to stock awards, shares			1,194,000
Stock-based compensation	6,454			6,454
Equity settled contingent consideration, value	$ 375			375
Equity settled contingent consideration, shares	12,492		12,000
Cumulative translation adjustment	$ (148)					(148)
Unrealized loss on investments	(101)					(101)
Net loss	(15,960)				(15,960)
Ending Balance at Sep. 30, 2017	$ 151,452		$ 5	$ 253,712	$ (102,007)	$ (258)
Ending Balance, Shares at Sep. 30, 2017	59,142,000		59,142,000

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Deficit (Parenthetical) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Statement of Stockholders' Equity [Abstract]
Stock issuance cost	$ 3,344

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net loss	$ (15,960)	$ (18,181)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	2,670	1,182
Stock-based compensation	6,454	2,334
Provision for doubtful accounts and sales reserve, net of recoveries	770	(36)
Deferred income taxes	(1,138)
Impairment of long-lived assets	1,050
Change in fair value of contingent consideration	190
Loss on disposal of assets	32	56
Changes in operating assets and liabilities, net of effect of business acquisitions:
Accounts receivable	3,892	(3,342)
Deferred commissions	827	249
Prepaid expenses and other current assets and other assets	(2,229)	(1,209)
Accounts payable	1,720	2,646
Accrued payroll and payroll related liabilities	(1,667)	(2,357)
Accrued expenses and other current liabilities	1,470	(241)
Deferred revenue	8,071	8,430
Other liabilities	288	1,343
Net cash provided by (used in) operating activities	6,440	(9,126)
Cash flows from investing activities:
Purchases of property and equipment	(2,303)	(3,454)
Cash paid in business acquisitions, net of cash acquired	(9,097)
Purchases of investments	(87,551)	(5,706)
Maturities of investments	21,768	11,382
Net cash provided by (used in) investing activities	(77,183)	2,222
Cash flows from financing activities:
Proceeds from initial public offering, net of underwriting commissions and discounts	134,757
Repurchase of common stock, net of costs paid		(256)
Principal payments on capital lease obligations	(247)	(165)
Proceeds from exercise of stock options	2,562	270
Net cash provided by (used in) financing activities	135,205	(569)
Effect of exchange rate changes on cash	8
Net increase (decrease) in cash and cash equivalents	64,470	(7,473)
Cash and cash equivalents-beginning of period	31,306	24,779
Cash and cash equivalents-end of period	95,776	17,306
Supplemental disclosure of noncash investing and financing activities:
Property and equipment recorded in accounts payable	26	108
Consideration for business acquisition initially included in accrued expenses and other current liabilities and other liabilities	1,660
Consideration for business acquisition from issuance of common stock	5,285
Contingent consideration settled through issuance of common stock	375
Accretion of Series A redeemable convertible preferred stock	1,983	4,466
Deferred initial public offering costs recorded in accounts payable and accrued expenses	529	329
Property and equipment funded by capital lease borrowing		987
Common Stock [Member]
Cash flows from financing activities:
Payments stock issuance costs	(1,867)	(68)
Series C Convertible Preferred Stock [Member]
Cash flows from financing activities:
Payments stock issuance costs		(350)
Series A Redeemable Convertible Preferred Stock [Member]
Supplemental disclosure of noncash investing and financing activities:
Accretion of Series A redeemable convertible preferred stock	1,983	$ 4,466
Conversion of Series A redeemable convertible preferred stock to common shares	$ 101,165

Business

Business	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	1. Business Our Company Alteryx, Inc. and its subsidiaries, or we, our, or us, are a leading provider of self-service data analytics software. Our software platform enables organizations to dramatically improve business outcomes and the productivity of their business analysts. Our subscription-based platform allows organizations to easily prepare, blend, and analyze data from a multitude of sources and more quickly benefit from data-driven decisions. The ease-of-use, speed, and sophistication that our platform provides is enhanced through intuitive and highly repeatable visual workflows. We aim to make our platform as ubiquitous in the workplace as spreadsheets are today. Initial Public Offering and Follow-on Public Offering In March 2017, we completed an initial public offering, or IPO, of our Class A common stock. In connection with the IPO, we sold 10.4 million shares of Class A common stock, which included the exercise in full of the underwriters’ option to purchase an additional 1.4 million shares in April 2017, at $14.00 per share for aggregate net proceeds of $131.4 million after underwriting discounts and commissions and offering expenses. Prior to the closing of the IPO, all shares of common stock then outstanding were reclassified as Class B common stock and all shares of our then outstanding convertible preferred stock held prior to the IPO were converted into Class B common stock. See Note 6 for further discussion of our Class A and Class B common stock. In September 2017, we completed a follow-on public offering in which a total of 8.0 million shares of our Class A common stock (issued upon automatic conversion of shares of our Class B common stock) were sold by certain selling stockholders at a price of $21.25 per share. We did not receive any proceeds from the sale of shares of our Class A common stock by the selling stockholders and we incurred offering costs of $0.7 million in the three and nine months ended September 30, 2017 in connection with this offering. These costs are included in general and administrative expense in our condensed consolidated statement of operations and comprehensive loss. As of September 30, 2017, we had 21.1 million and 38.0 million shares of Class A common stock and Class B common stock issued and outstanding, respectively. Basis of Presentation Our interim condensed consolidated financial statements are presented in accordance with accounting standards generally accepted in the United States of America, or U.S. GAAP, for interim financial information. Certain information and disclosures normally included in consolidated financial statements presented in accordance with U.S. GAAP have been condensed or omitted. Accordingly, these condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes for the year ended December 31, 2016 included in our final prospectus related to our IPO dated March 23, 2017, or the Prospectus, filed with the Securities and Exchange Commission, or SEC, pursuant to Rule 424(b) under the Securities Act of 1933, as amended, or the Securities Act. The unaudited interim condensed consolidated financial statements have been prepared on a basis consistent with that used to prepare the audited annual consolidated financial statements and reflect all adjustments which are, in the opinion of our management, of a normal recurring nature and necessary for a fair statement of the condensed consolidated financial statements. The operating results for the three and nine months ended September 30, 2017 are not necessarily indicative of the results expected for the full year ending December 31, 2017.

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Significant Accounting Policies	2. Significant Accounting Policies There have been no changes to our accounting policies disclosed in our audited consolidated financial statements and the related notes for the year ended December 31, 2016 included in our Prospectus. As a result of business combinations made during the nine months ended September 30, 2017 (see Note 3), we have included our accounting policies relating to business combinations, intangible assets, and goodwill below. Correction of an Error In the course of preparing our consolidated financial statements as of and for the year ended December 31, 2016, we identified an error related to the improper calculation of royalty expense during the year ended December 31, 2016 associated with licensed third-party syndicated data. We have determined that the error was not material to our interim unaudited consolidated financial statements as of September 30, 2016, and for the three and nine months then ended. The correction of this error resulted in a revision which increased cost of revenue, loss from operations, net loss, and comprehensive loss by $0.3 million and $1.1 million for the three and nine months ended September 30, 2016, respectively, and decreased prepaid expenses and other current assets and total assets, and increased accumulated deficit by $1.1 million as of September 30, 2016. For the nine months ended September 30, 2016, the revision increased cost of revenue from $10.6 million to $11.7 million, loss from operations from $16.4 million to $17.5 million, loss before provision for income taxes from $16.9 million to $18.0 million, net loss from $17.1 million to $18.2 million, and comprehensive loss from $17.0 million to $18.1 million. Net loss per share attributable to common stockholders, basic and diluted, increased by $0.04 from $0.66 to $0.70 for the nine months ended September 30, 2016. Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities at the date of the condensed consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates and assumptions. On an ongoing basis, our management evaluates estimates and assumptions based on historical data and experience, as well as various other factors that our management believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities. Business Combinations The results of businesses acquired in a business combination are included in our condensed consolidated financial statements from the date of the acquisition. We allocated the purchase price, including the fair value of any non-cash and contingent consideration, to the identifiable assets and liabilities of the relevant acquired business at their acquisition date fair values. Any excess consideration over the fair value of assets acquired and liabilities assumed is recognized as goodwill. Contingent consideration payable in cash or a fixed dollar amount settleable in a variable number of shares is classified as a liability and recorded at fair value, with changes in fair value recorded in general and administrative expenses each period. Transaction costs associated with business combinations are expensed as incurred, and are included in general and administrative expense in the condensed consolidated statements of operations and comprehensive loss. We perform valuations of assets acquired, liabilities assumed, and contingent consideration and allocate the purchase price to its respective assets and liabilities. Determining the fair value of assets acquired, liabilities assumed, and contingent consideration requires us to use significant judgment and estimates including the selection of valuation methodologies, estimates of future revenue, costs and cash flows, discount rates, the probability of the achievement of specified milestones, and selection of comparable companies. We engage the assistance of valuation specialists in concluding on fair value measurements in connection with determining fair values of assets acquired, liabilities assumed, and contingent consideration in a business combination. Intangible Assets Intangible assets consist of acquired developed technology. We determine the appropriate useful life of our intangible assets by performing an analysis of expected cash flows of the acquired assets. Intangible assets are amortized over their estimated useful lives of three to seven years, using the straight-line method, which approximates the pattern in which the economic benefits are consumed. Goodwill Goodwill represents the excess of the purchase price over the fair value of net assets acquired in a business combination. We test goodwill for impairment in accordance with the provisions of Accounting Standards Codification, or ASC, 350, Intangibles – Goodwill and Other ASC 350 provides that an entity has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then additional impairment testing is not required. However, if an entity concludes otherwise, then it is required to perform the first of a two-step impairment test. The first step involves comparing the estimated fair value of a reporting unit with its book value, including goodwill. If the estimated fair value exceeds book value, goodwill is considered not to be impaired and no additional steps are necessary. If, however, the fair value of the reporting unit is less than book value, then the carrying amount of the goodwill is compared with its implied fair value. The estimate of implied fair value of goodwill may require valuations of certain internally generated and unrecognized intangible assets. If the carrying amount of goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in an amount equal to the excess. We have one reporting unit and we test for goodwill impairment annually during the fourth quarter of each calendar year. Variable Interest Entities In accordance with ASC 810, Consolidation As of September 30, 2017 and December 31, 2016, we determined that two of our distributors were VIEs under the guidance of ASC 810, Consolidation Recent Accounting Pronouncements In January 2017, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, 2017-04, Simplifying the Test for Goodwill Impairment In January 2017, the FASB issued ASU 2017-01, Clarifying the Definition of a Business In November 2016, the FASB issued ASU 2016-18, Restricted Cash In October 2016, the FASB issued ASU 2016-16, Intra-Entity Transfers of Assets Other Than Inventory Income Taxes, In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments In March 2016, the FASB issued ASU 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting In February 2016, the FASB issued ASU 2016-02, Leases In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Business Combinations	3. Business Combinations In January 2017, we acquired 100% of the outstanding equity of Semanta, s.r.o., or Semanta, a software development firm based in Prague, Czech Republic that delivers a cloud-based data governance and metadata management platform. In May 2017, we acquired 100% of the outstanding equity of Yhat, Inc., or Yhat, a data science software company based in Brooklyn, New York that provides data scientists and analysts with self-service data science tools for developing, managing, and deploying analytical models. These acquisitions were made to enhance our platform with additional data governance capabilities and the ability to deploy and manage advanced analytic models. The following table presents details of the purchase consideration related to each acquisition. Company Acquired Month Cash Equity Cash Holdback Contingent Contingent Semanta January 2017 $ 3,944 $ — $ 500 $ 2,300 $ 1,160 Yhat May 2017 5,535 5,285 — — — $ 9,479 $ 5,285 $ 500 $ 2,300 $ 1,160 The acquisition of Semanta included cash consideration held back for customary indemnification matters for a period of 24-months following the acquisition date. A portion of the cash consideration in the Yhat acquisition is currently held in escrow pursuant to the terms of the acquisition agreement and is reflected in goodwill. The condensed consolidated financial statements include the results of operations of the acquired companies commencing as of their respective acquisition dates. Revenue and operating results of the acquired companies for the nine months ended September 30, 2017 were not material to the condensed consolidated financial statements. During the nine months ended September 30, 2017, we recognized $0.9 million of acquisition related costs in general and administrative expense in the condensed consolidated statement of operations and comprehensive loss. The following table summarizes the estimated fair values of the assets acquired and liabilities assumed as of the dates of each acquisition (in thousands): Assets acquired and liabilities assumed: Cash and cash equivalents $ 382 Accounts receivable 247 Prepaid expenses and other assets 68 Property and equipment 54 Intangible assets 9,220 Goodwill 8,724 Accounts payable (479 ) Accrued expenses, deferred revenue and other current liabilities (205 ) Deferred tax liability, included in other liabilities (1,587 ) Total purchase consideration $ 16,424 Goodwill represents the excess of the purchase consideration over the fair value of the underlying intangible assets and net liabilities assumed. We believe the amount of goodwill resulting from the acquisitions is primarily attributable to expected synergies from an assembled workforce, increased development capabilities, increased offerings to customers, and enhanced opportunities for growth and innovation. The goodwill resulting from the acquisitions is not tax deductible. We determined the fair value of the completed technology acquired in the acquisitions using the multiple period excess earnings and the replacement cost models. These models utilize certain unobservable inputs classified as Level 3 measurements as defined by ASC 820, Fair Value Measurements and Disclosures A portion of the consideration for the Semanta acquisition is subject to earn-out provisions. Additional contingent earn-out consideration of up to $2.3 million in shares of our Class A common stock may be paid out to the former shareholders of Semanta over two years upon the achievement of specified milestones. The number of shares that will be issued will be determined based on the total dollar value of consideration earned upon the achievement of a particular milestone divided by an average trading value of our Class A common stock calculated at the time of the issuance. We utilized a probability weighted scenario based model to determine the fair value of the contingent consideration. Based on this valuation model we determined the fair value of the contingent consideration to be $1.2 million as of the acquisition date. Pro forma information as if the acquisitions occurred on January 1, 2016 has not been presented as the pro forma impact is not material to our condensed consolidated financial statements.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	4. Fair Value Measurements We utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. We determine fair value based on assumptions that market participants would use in pricing an asset or liability in the principal or most advantageous market. When considering market participant assumptions in fair value measurements, the following fair value hierarchy distinguishes between observable and unobservable inputs, which are categorized in one of the following levels: Level 1 Unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date. Level 2 Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active near the measurement date; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The fair value of our money market funds was determined based on “Level 1” inputs. The fair value of certificates of deposit, U.S. Treasury and agency bonds, and corporate bonds were determined based on “Level 2” inputs. The valuation techniques used to measure the fair value of certificates of deposit included observable market-based inputs for similar assets, which primarily include yield curves and time-to-maturity factors. The valuation techniques used to measure the fair value of U.S. Treasury and agency bonds and corporate bonds included standard observable inputs, including reported trades, quoted market prices, matrix pricing, benchmark yields, broker/dealer quotes, issuer spreads, two-sided markets or benchmark securities and data provided by third parties as many of the bonds are not actively traded. There were no marketable securities measured on a recurring basis in the “Level 3” category. We have not elected the fair value option as prescribed by ASC 825, The Fair Value Option for Financial Assets and Financial Liabilities Instruments Measured at Fair Value on a Recurring Basis. As of September 30, 2017 Gross Cash and Unrealized Cash Short-term Long-term Cost Gains (Losses) Fair Value Equivalents Investments Investments Cash $ 89,377 $ — $ 89,377 $ 89,377 $ — $ — Level 1: Money market funds 6,399 — 6,399 6,399 — — Subtotal 6,399 — 6,399 6,399 — — Level 2: Certificates of deposit 2,584 — 2,584 — 2,584 — U.S. Treasury and agency bonds 52,537 (78 ) 52,459 — 27,569 24,890 Corporate bonds 31,790 (32 ) 31,758 — 30,659 1,099 Subtotal 86,911 (110 ) 86,801 — 60,812 25,989 Level 3 — — — — — — Total $ 182,687 $ (110 ) $ 182,577 $ 95,776 $ 60,812 $ 25,989 As of December 31, 2016 Gross Cash and Unrealized Cash Short-term Long-term Cost Gains (Losses) Fair Value Equivalents Investments Investments Cash $ 10,499 $ — $ 10,499 $ 10,499 $ — $ — Level 1: Money market funds 20,807 — 20,807 20,807 — — Subtotal 20,807 — 20,807 20,807 — — Level 2: — Certificates of deposit 10,552 — 10,552 — 10,552 — Corporate bonds 10,770 72 10,842 — 10,842 — Subtotal 21,322 72 21,394 — 21,394 — Level 3 — — — — — — Total $ 52,628 $ 72 $ 52,700 $ 31,306 $ 21,394 $ — There were no transfers between Level 1, Level 2, or Level 3 securities during the nine months ended September 30, 2017. As of September 30, 2017, there were 28 securities with a fair value of $77.9 million in an unrealized loss position for less than 12 months. The gross unrealized losses of $0.1 million as of September 30, 2017 were due to changes in market rates, and we have determined the losses are temporary in nature. All the long-term investments had maturities of between one and two years in duration as of September 30, 2017. Cash and cash equivalents, restricted cash, and investments as of September 30, 2017 and December 31, 2016 held domestically were approximately $166.9 million and $52.9 million, respectively. Contingent Consideration. The following table presents a reconciliation of the beginning and ending balances of acquisition-related accrued contingent consideration using significant unobservable inputs (Level 3) for the three and nine months ended September 30, 2017 (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Beginning balance $ 1,318 $ — $ — $ — Obligations assumed — — 1,160 — Change in fair value 32 — 190 — Settlement (375 ) — (375 ) — Ending balance $ 975 $ — $ 975 $ — Upon the achievement of certain milestones in connection with our acquisition of Semanta, we released 12,492 shares of Class A common stock to the former shareholders of Semanta in the nine months ended September 30, 2017. In addition, 4,824 shares were earned, but held back for customary indemnification matters in accordance with the acquisition agreement, and the value of the shares is presented within additional paid-in capital in the condensed consolidated balance sheet as of September 30, 2017. Subject to any indemnification claims that may arise during the indemnification period, these shares will be issued to the former shareholders upon the completion of the indemnification period. Instruments Not Recorded at Fair Value on a Recurring Basis. Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis.

Cost Method Investment

Cost Method Investment	9 Months Ended
	Sep. 30, 2017
Investments, All Other Investments [Abstract]
Cost Method Investment	5. Cost Method Investment In November 2014, we entered into a definitive agreement with a privately held company, in which we agreed to invest approximately $1.1 million in exchange for shares of convertible preferred stock equal to approximately 15% ownership of the privately held company. We account for our investment in this company using the cost method of accounting and the investment balance is included in other non-current assets in our condensed consolidated balance sheets. We evaluate the investment at each reporting date to determine if any indicators of other-than-temporary impairment exist. If such indicators are identified, we will estimate the fair value of the investment and determine if any decline in the fair value of the investment below its carrying value is other-than-temporary. The estimated fair value is determined using unobservable inputs including forecasted cash flow information from the investee’s management. These inputs are classified as Level 3. During the three months ended September 30, 2017, we determined that indicators of other-than-temporary impairment existed. Based on our evaluation, we estimated the fair value of the investment and recorded an impairment for the full value of the investment of $1.1 million. The impairment is included in other expenses in our condensed consolidated statements of operations for the three and nine months ended September 30, 2017.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Stockholders' Equity	6. Stockholders’ Equity Reverse Stock Split In February 2017, we effected a 2-to-1 reverse stock split of our outstanding common and preferred stock and a corresponding reduction in the number of authorized shares of preferred stock. All share and per share amounts for all periods presented in these condensed consolidated financial statements and notes, have been adjusted retrospectively to reflect this reverse stock split. Dual Class Common Stock Structure In February 2017, we implemented a dual class common stock structure in which each then existing share of common stock converted into a share of Class B common stock and we also authorized a new class of common stock, the Class A common stock. The Class A common stock is entitled to one vote per share and the Class B common stock is entitled to ten votes per share. The Class A common stock and Class B common stock have the same dividend and liquidation rights, and the Class B common stock converts to Class A common stock at any time at the option of the holder, or automatically upon the date that is the earliest of (i) the date specified by a vote of the holders of at least 66 2/3% of the outstanding shares of Class B common stock, (ii) March 29, 2027, and (iii) the date that the total number of shares of Class B common stock outstanding cease to represent at least 10% of the aggregate number of shares of Class A common stock and Class B common stock then outstanding. In addition, each share of Class B common stock will convert automatically into one share of Class A common stock upon any transfer, except for certain permitted transfers described in our restated certificate of incorporation, or the Restated Certificate. Upon the creation of the dual class common stock structure all outstanding options to purchase common stock became options to purchase an equivalent number of shares of Class B common stock, and all restricted stock units, or RSUs, became RSUs for an equivalent number of shares of Class B common stock. Upon the effectiveness of the Restated Certificate in March 2017, the number of shares of capital stock that is authorized to be issued consisted of 500,000,000 shares of Class A common stock, $0.0001 par value per share, 500,000,000 shares of Class B common stock, $0.0001 par value per share, and 10,000,000 shares of undesignated preferred stock, $0.0001 par value per share.

Equity Awards

Equity Awards	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Awards	7. Equity Awards Amended and Restated 2013 Stock Plan We granted options and RSUs under our Amended and Restated 2013 Stock Plan, or 2013 Plan, until March 22, 2017, when the plan was terminated in connection with our IPO. Accordingly, no shares are available for future issuance under the 2013 Plan following the IPO. The 2013 Plan continues to govern outstanding equity awards granted thereunder. 2017 Equity Incentive Plan In February 2017, our board of directors adopted and our stockholders approved the 2017 Equity Incentive Plan, or 2017 Plan. The 2017 Plan became effective on March 22, 2017 and is the successor plan to the 2013 Plan. Under the 2017 Plan, we initially reserved (i) 5.1 million shares of Class A common stock for future issuance and (ii) 0.8 million shares of Class A common stock equal to the number of Class B shares reserved but not issued under the 2013 Plan as of the effective date of the 2017 Plan. The number of shares of Class A common stock reserved for issuance under our 2017 Plan will increase automatically on the first day of January of each of 2018 through 2027 by the lesser of (a) 5% of the total outstanding shares of our Class A and Class B common stock as of the immediately preceding December 31 and (b) the number of shares determined by our board of directors. The share reserve may also increase to the extent that outstanding awards under our 2013 Plan expire or terminate. As of September 30, 2017, an aggregate of 5.4 million shares of Class A common stock were reserved for issuance under the 2017 Plan. 2017 Employee Stock Purchase Plan In February 2017, our board of directors adopted and our stockholders approved the 2017 Employee Stock Purchase Plan, or 2017 ESPP. The 2017 ESPP became effective on March 23, 2017. Under the 2017 ESPP, we reserved 1.1 million shares of Class A common stock for future issuance. The number of shares of Class A common stock reserved for issuance under our 2017 ESPP will increase automatically on the first day of January of each of 2018 through 2027 by the lesser of (a) 1% of the total outstanding shares of our Class A and Class B common stock as of the immediately preceding December 31 and (b) the number of shares determined by our board of directors. The aggregate number of shares issued over the term of the 2017 ESPP may not exceed 11,000,000 shares of Class A common stock. Stock Options Stock option activity during the nine months ended September 30, 2017 consisted of the following (in thousands, except weighted-average information): Options Weighted- Options outstanding at December 31, 2016 6,318 $ 5.65 Granted 938 16.72 Exercised (1,099 ) 1.36 Cancelled/forfeited (538 ) 8.30 Options outstanding at September 30, 2017 5,619 $ 8.08 As of September 30, 2017, there was $11.9 million of unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted-average period of 2.9 years. Restricted Stock Units RSU activity during the nine months ended September 30, 2017 consisted of the following (in thousands, except weighted-average information): Awards Weighted- RSUs outstanding at December 31, 2016 373 $ 12.30 Granted 178 18.10 Cancelled/forfeited (96 ) 12.67 RSUs outstanding at September 30, 2017 455 $ 14.50 RSUs outstanding as of December 31, 2016, or pre-2017 RSUs, vest upon the satisfaction of both a service condition and a liquidity condition. The service condition for these awards will be satisfied over four years. The liquidity condition was satisfied on September 25, 2017, which was 180 days following the closing of the IPO. Beginning on the closing of the IPO in March 2017, we recognized a cumulative stock-based compensation expense for the portion of the pre-2017 RSUs that had met the service condition. In the nine months ended September 30, 2017, stock-based compensation expense related to our pre-2017 RSUs was $1.4 million. As of September 30, 2017, total unrecognized compensation expense, adjusted for estimated forfeitures, related to unvested RSUs was approximately $3.7 million, which is expected to be recognized over a weighted-average period of 2.0 years. We classified stock-based compensation expense in the accompanying consolidated statements of operations and comprehensive loss as follows (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Cost of revenue $ 123 $ 24 $ 368 $ 72 Research and development 458 99 1,157 243 Sales and marketing 459 308 1,642 942 General and administrative 1,239 475 3,342 1,077 Total $ 2,279 $ 906 $ 6,509 $ 2,334

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	8. Commitments and Contingencies Leases We have various non-cancelable operating leases for our offices. These leases expire at various times through 2024. Certain lease agreements contain renewal options, rent abatement, and escalation clauses. Indemnification In the ordinary course of business, we enter into agreements in which we may agree to indemnify other parties with respect to certain matters, including losses resulting from claims of intellectual property infringement, damages to property or persons, business losses, or other liabilities. In addition, we have entered into indemnification agreements with our directors, executive officers, and certain other employees that will require us to indemnify them against liabilities that may arise by reason of their status or service as directors, officers, or employees. The term of these indemnification agreements with our directors, executive officers, and other employees, are generally perpetual after execution of the agreement. The maximum potential amount of future payments we could be required to make under these indemnification provisions is unlimited; however, we maintain insurance that reduces our exposure and enables us to recover a portion of any future amounts paid. As of September 30, 2017 and December 31, 2016, we have not accrued a liability for these indemnification provisions because the likelihood of incurring a payment obligation, if any, in connection with these arrangements is not probable or reasonably estimable. Litigation From time to time, we may be involved in lawsuits, claims, investigations, and proceedings, consisting of intellectual property, commercial, employment, and other matters, which arise in the ordinary course of business. We are not currently a party to any material legal proceedings or claims, nor are we aware of any pending or threatened litigation or claims that could have a material adverse effect on our business, operating results, cash flows, or financial condition should such litigation or claim be resolved unfavorably.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	9. Income Taxes The following table presents details of the provision for (benefit of) income taxes and our effective tax rates (in thousands except percentages): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Provision for (benefit of) income taxes $ 25 $ 58 $ (632 ) $ 148 Effective tax rate 0.8 % 1.4 % (3.8 %) 0.8 % We account for income taxes according to ASC 740, Income Taxes, We evaluate whether to record a valuation allowance against our deferred tax assets by considering all available positive and negative evidence, using a “more likely than not” realization standard, including our cumulative losses, and the amount and timing of future taxable income. Based on our review, we will continue to maintain a full valuation allowance against our U.S. deferred tax assets. The income tax benefit of $0.6 million for the nine months ended September 30, 2017 primarily relates to a discrete tax benefit of $1.0 million related to a decrease in our valuation allowance against our deferred tax assets related to the Yhat acquisition, offset in part by U.S. and Czech tax expense from the sale of the intellectual property related to our products from the U.S. parent company to wholly owned subsidiaries outside the United States and from the Czech subsidiary to the U.S. parent company and other wholly owned subsidiaries outside the United States. Neither we nor any of our subsidiaries are currently under examination from tax authorities in the jurisdictions in which we do business.

Basic and Diluted Net Loss Per

Basic and Diluted Net Loss Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Basic and Diluted Net Loss Per Share	10. Basic and Diluted Net Loss Per Share In periods in which we have net income, we apply the two-class method for calculating net loss per share. Under the two-class method, net income is attributed to common stockholders and participating securities based on their participation rights. Participating securities include convertible preferred stock. In periods in which we have net losses after accretion of convertible preferred stock, we do not attribute losses to participating securities as they are not contractually obligated to share our losses. Under the two-class method, basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Net loss attributable to common stockholders is calculated as net loss including current period convertible preferred stock accretion. Diluted net loss per share attributable to common stockholders adjusts basic net loss per share for the potentially dilutive impact of stock options and convertible preferred stock. As we have reported losses attributable to common stockholders for all periods presented, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share. Basic and diluted net loss per share attributable to common stockholders for Class A and Class B common stock were the same because they were entitled to the same liquidation and dividend rights. The following weighted-average equivalent shares of common stock were excluded from the diluted net loss per share calculation because their inclusion would have been anti-dilutive (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Options to purchase common stock 5,890 5,590 6,029 5,363 Unvested restricted stock units 418 — 411 — Conversion of convertible preferred stock — 14,647 4,399 14,647 Contingently issuable shares 12 — 4 — Total shares excluded from net loss per share 6,320 20,237 10,843 20,010

Segment and Geographic Informat

Segment and Geographic Information	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segment and Geographic Information	11. Segment and Geographic Information Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker, or CODM, who is our chief executive officer, in deciding how to allocate resources and assess our financial and operational performance. Our CODM evaluates our financial information and resources and assesses the performance of these resources on a consolidated and aggregated basis. As a result, we have determined that our business operates in a single operating segment. Our operations outside the United States include sales offices in Canada, Czech Republic, Germany, Singapore, and the United Kingdom, and a research and development center in Ukraine. Revenue by location is determined by the billing address of the customer. The following sets forth our revenue by geographic region (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 United States $ 26,290 $ 18,158 $ 72,582 $ 49,632 International 7,865 4,304 20,437 11,196 Total $ 34,155 $ 22,462 $ 93,019 $ 60,828 No countries outside the United States comprised more than 10% of revenue for any of the periods presented.

Significant Accounting Polici19

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Correction of an Error	Correction of an Error In the course of preparing our consolidated financial statements as of and for the year ended December 31, 2016, we identified an error related to the improper calculation of royalty expense during the year ended December 31, 2016 associated with licensed third-party syndicated data. We have determined that the error was not material to our interim unaudited consolidated financial statements as of September 30, 2016, and for the three and nine months then ended. The correction of this error resulted in a revision which increased cost of revenue, loss from operations, net loss, and comprehensive loss by $0.3 million and $1.1 million for the three and nine months ended September 30, 2016, respectively, and decreased prepaid expenses and other current assets and total assets, and increased accumulated deficit by $1.1 million as of September 30, 2016. For the nine months ended September 30, 2016, the revision increased cost of revenue from $10.6 million to $11.7 million, loss from operations from $16.4 million to $17.5 million, loss before provision for income taxes from $16.9 million to $18.0 million, net loss from $17.1 million to $18.2 million, and comprehensive loss from $17.0 million to $18.1 million. Net loss per share attributable to common stockholders, basic and diluted, increased by $0.04 from $0.66 to $0.70 for the nine months ended September 30, 2016.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities at the date of the condensed consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates and assumptions. On an ongoing basis, our management evaluates estimates and assumptions based on historical data and experience, as well as various other factors that our management believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities.
Business Combinations	Business Combinations The results of businesses acquired in a business combination are included in our condensed consolidated financial statements from the date of the acquisition. We allocated the purchase price, including the fair value of any non-cash and contingent consideration, to the identifiable assets and liabilities of the relevant acquired business at their acquisition date fair values. Any excess consideration over the fair value of assets acquired and liabilities assumed is recognized as goodwill. Contingent consideration payable in cash or a fixed dollar amount settleable in a variable number of shares is classified as a liability and recorded at fair value, with changes in fair value recorded in general and administrative expenses each period. Transaction costs associated with business combinations are expensed as incurred, and are included in general and administrative expense in the condensed consolidated statements of operations and comprehensive loss. We perform valuations of assets acquired, liabilities assumed, and contingent consideration and allocate the purchase price to its respective assets and liabilities. Determining the fair value of assets acquired, liabilities assumed, and contingent consideration requires us to use significant judgment and estimates including the selection of valuation methodologies, estimates of future revenue, costs and cash flows, discount rates, the probability of the achievement of specified milestones, and selection of comparable companies. We engage the assistance of valuation specialists in concluding on fair value measurements in connection with determining fair values of assets acquired, liabilities assumed, and contingent consideration in a business combination.
Intangible Assets	Intangible Assets Intangible assets consist of acquired developed technology. We determine the appropriate useful life of our intangible assets by performing an analysis of expected cash flows of the acquired assets. Intangible assets are amortized over their estimated useful lives of three to seven years, using the straight-line method, which approximates the pattern in which the economic benefits are consumed.
Goodwill	Goodwill Goodwill represents the excess of the purchase price over the fair value of net assets acquired in a business combination. We test goodwill for impairment in accordance with the provisions of Accounting Standards Codification, or ASC, 350, Intangibles – Goodwill and Other ASC 350 provides that an entity has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, an entity determines it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then additional impairment testing is not required. However, if an entity concludes otherwise, then it is required to perform the first of a two-step impairment test. The first step involves comparing the estimated fair value of a reporting unit with its book value, including goodwill. If the estimated fair value exceeds book value, goodwill is considered not to be impaired and no additional steps are necessary. If, however, the fair value of the reporting unit is less than book value, then the carrying amount of the goodwill is compared with its implied fair value. The estimate of implied fair value of goodwill may require valuations of certain internally generated and unrecognized intangible assets. If the carrying amount of goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in an amount equal to the excess. We have one reporting unit and we test for goodwill impairment annually during the fourth quarter of each calendar year.
Variable Interest Entities	Variable Interest Entities In accordance with ASC 810, Consolidation As of September 30, 2017 and December 31, 2016, we determined that two of our distributors were VIEs under the guidance of ASC 810, Consolidation
Recent Accounting Pronouncements	Recent Accounting Pronouncements In January 2017, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, 2017-04, Simplifying the Test for Goodwill Impairment In January 2017, the FASB issued ASU 2017-01, Clarifying the Definition of a Business In November 2016, the FASB issued ASU 2016-18, Restricted Cash In October 2016, the FASB issued ASU 2016-16, Intra-Entity Transfers of Assets Other Than Inventory Income Taxes, In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments In March 2016, the FASB issued ASU 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting In February 2016, the FASB issued ASU 2016-02, Leases In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers
Fair Value Measurements	Fair Value Measurements We utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. We determine fair value based on assumptions that market participants would use in pricing an asset or liability in the principal or most advantageous market. When considering market participant assumptions in fair value measurements, the following fair value hierarchy distinguishes between observable and unobservable inputs, which are categorized in one of the following levels: Level 1 Unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date. Level 2 Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active near the measurement date; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The fair value of our money market funds was determined based on “Level 1” inputs. The fair value of certificates of deposit, U.S. Treasury and agency bonds, and corporate bonds were determined based on “Level 2” inputs. The valuation techniques used to measure the fair value of certificates of deposit included observable market-based inputs for similar assets, which primarily include yield curves and time-to-maturity factors. The valuation techniques used to measure the fair value of U.S. Treasury and agency bonds and corporate bonds included standard observable inputs, including reported trades, quoted market prices, matrix pricing, benchmark yields, broker/dealer quotes, issuer spreads, two-sided markets or benchmark securities and data provided by third parties as many of the bonds are not actively traded. There were no marketable securities measured on a recurring basis in the “Level 3” category. We have not elected the fair value option as prescribed by ASC 825, The Fair Value Option for Financial Assets and Financial Liabilities
Income Taxes	We account for income taxes according to ASC 740, Income Taxes, We evaluate whether to record a valuation allowance against our deferred tax assets by considering all available positive and negative evidence, using a “more likely than not” realization standard, including our cumulative losses, and the amount and timing of future taxable income. Based on our review, we will continue to maintain a full valuation allowance against our U.S. deferred tax assets. The income tax benefit of $0.6 million for the nine months ended September 30, 2017 primarily relates to a discrete tax benefit of $1.0 million related to a decrease in our valuation allowance against our deferred tax assets related to the Yhat acquisition, offset in part by U.S. and Czech tax expense from the sale of the intellectual property related to our products from the U.S. parent company to wholly owned subsidiaries outside the United States and from the Czech subsidiary to the U.S. parent company and other wholly owned subsidiaries outside the United States. Neither we nor any of our subsidiaries are currently under examination from tax authorities in the jurisdictions in which we do business.
Basic and Diluted Net Loss Per Share	Basic and Diluted Net Loss Per Share In periods in which we have net income, we apply the two-class method for calculating net loss per share. Under the two-class method, net income is attributed to common stockholders and participating securities based on their participation rights. Participating securities include convertible preferred stock. In periods in which we have net losses after accretion of convertible preferred stock, we do not attribute losses to participating securities as they are not contractually obligated to share our losses. Under the two-class method, basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Net loss attributable to common stockholders is calculated as net loss including current period convertible preferred stock accretion. Diluted net loss per share attributable to common stockholders adjusts basic net loss per share for the potentially dilutive impact of stock options and convertible preferred stock. As we have reported losses attributable to common stockholders for all periods presented, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share. Basic and diluted net loss per share attributable to common stockholders for Class A and Class B common stock were the same because they were entitled to the same liquidation and dividend rights.
Segment and Geographic Information	11. Segment and Geographic Information Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker, or CODM, who is our chief executive officer, in deciding how to allocate resources and assess our financial and operational performance. Our CODM evaluates our financial information and resources and assesses the performance of these resources on a consolidated and aggregated basis. As a result, we have determined that our business operates in a single operating segment.

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Summary of Purchase Consideration Related to Each Acquisition	The following table presents details of the purchase consideration related to each acquisition. Company Acquired Month Cash Equity Cash Holdback Contingent Contingent Semanta January 2017 $ 3,944 $ — $ 500 $ 2,300 $ 1,160 Yhat May 2017 5,535 5,285 — — — $ 9,479 $ 5,285 $ 500 $ 2,300 $ 1,160
Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed as of the dates of each acquisition (in thousands): Assets acquired and liabilities assumed: Cash and cash equivalents $ 382 Accounts receivable 247 Prepaid expenses and other assets 68 Property and equipment 54 Intangible assets 9,220 Goodwill 8,724 Accounts payable (479 ) Accrued expenses, deferred revenue and other current liabilities (205 ) Deferred tax liability, included in other liabilities (1,587 ) Total purchase consideration $ 16,424

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Summary of Cash and Cash Equivalents and Investments' Costs, Gross Unrealized Gains (Losses), and Fair Value by Major Security Type Recorded as Cash and Cash Equivalents or Short-Term or Long-Term Investments	The following tables present our cash and cash equivalents and investments’ costs, gross unrealized gains (losses), and fair value by major security type recorded as cash and cash equivalents or short-term or long-term investments as of September 30, 2017 and December 31, 2016 (in thousands): As of September 30, 2017 Gross Cash and Unrealized Cash Short-term Long-term Cost Gains (Losses) Fair Value Equivalents Investments Investments Cash $ 89,377 $ — $ 89,377 $ 89,377 $ — $ — Level 1: Money market funds 6,399 — 6,399 6,399 — — Subtotal 6,399 — 6,399 6,399 — — Level 2: Certificates of deposit 2,584 — 2,584 — 2,584 — U.S. Treasury and agency bonds 52,537 (78 ) 52,459 — 27,569 24,890 Corporate bonds 31,790 (32 ) 31,758 — 30,659 1,099 Subtotal 86,911 (110 ) 86,801 — 60,812 25,989 Level 3 — — — — — — Total $ 182,687 $ (110 ) $ 182,577 $ 95,776 $ 60,812 $ 25,989 As of December 31, 2016 Gross Cash and Unrealized Cash Short-term Long-term Cost Gains (Losses) Fair Value Equivalents Investments Investments Cash $ 10,499 $ — $ 10,499 $ 10,499 $ — $ — Level 1: Money market funds 20,807 — 20,807 20,807 — — Subtotal 20,807 — 20,807 20,807 — — Level 2: — Certificates of deposit 10,552 — 10,552 — 10,552 — Corporate bonds 10,770 72 10,842 — 10,842 — Subtotal 21,322 72 21,394 — 21,394 — Level 3 — — — — — — Total $ 52,628 $ 72 $ 52,700 $ 31,306 $ 21,394 $ —
Reconciliation of Beginning and Ending Balances of Acquisition-Related Accrued Contingent Consideration	The following table presents a reconciliation of the beginning and ending balances of acquisition-related accrued contingent consideration using significant unobservable inputs (Level 3) for the three and nine months ended September 30, 2017 (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Beginning balance $ 1,318 $ — $ — $ — Obligations assumed — — 1,160 — Change in fair value 32 — 190 — Settlement (375 ) — (375 ) — Ending balance $ 975 $ — $ 975 $ —

Equity Awards (Tables)

Equity Awards (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock Option Activity	Stock option activity during the nine months ended September 30, 2017 consisted of the following (in thousands, except weighted-average information): Options Weighted- Options outstanding at December 31, 2016 6,318 $ 5.65 Granted 938 16.72 Exercised (1,099 ) 1.36 Cancelled/forfeited (538 ) 8.30 Options outstanding at September 30, 2017 5,619 $ 8.08
Schedule of RSU Activity	RSU activity during the nine months ended September 30, 2017 consisted of the following (in thousands, except weighted-average information): Awards Weighted- RSUs outstanding at December 31, 2016 373 $ 12.30 Granted 178 18.10 Cancelled/forfeited (96 ) 12.67 RSUs outstanding at September 30, 2017 455 $ 14.50
Schedule of Stock-based Compensation Expense	We classified stock-based compensation expense in the accompanying consolidated statements of operations and comprehensive loss as follows (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Cost of revenue $ 123 $ 24 $ 368 $ 72 Research and development 458 99 1,157 243 Sales and marketing 459 308 1,642 942 General and administrative 1,239 475 3,342 1,077 Total $ 2,279 $ 906 $ 6,509 $ 2,334

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Schedule of Provision for (Benefit of) Income Taxes and Effective Tax Rates	The following table presents details of the provision for (benefit of) income taxes and our effective tax rates (in thousands except percentages): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Provision for (benefit of) income taxes $ 25 $ 58 $ (632 ) $ 148 Effective tax rate 0.8 % 1.4 % (3.8 %) 0.8 %

Basic and Diluted Net Loss Pe24

Basic and Diluted Net Loss Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Anti-dilutive Securities Excluded from Computation of Diluted Net Loss Per Share	The following weighted-average equivalent shares of common stock were excluded from the diluted net loss per share calculation because their inclusion would have been anti-dilutive (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 Options to purchase common stock 5,890 5,590 6,029 5,363 Unvested restricted stock units 418 — 411 — Conversion of convertible preferred stock — 14,647 4,399 14,647 Contingently issuable shares 12 — 4 — Total shares excluded from net loss per share 6,320 20,237 10,843 20,010

Segment and Geographic Inform25

Segment and Geographic Information (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Schedule of Revenue by Geographic Region	The following sets forth our revenue by geographic region (in thousands): Three Months Ended Nine Months Ended 2017 2016 2017 2016 United States $ 26,290 $ 18,158 $ 72,582 $ 49,632 International 7,865 4,304 20,437 11,196 Total $ 34,155 $ 22,462 $ 93,019 $ 60,828

Business - Additional Informati

Business - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands	1 Months Ended			3 Months Ended	9 Months Ended
	Sep. 30, 2017	Apr. 30, 2017	Mar. 31, 2017	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Organization And Description Of Business [Line Items]
Aggregate net proceeds from IPO					$ 134,757,000
Common Stock shares issued	59,142			59,142	59,142	32,674
Common stock shares outstanding	59,142			59,142	59,142	32,674
Class A Common Stock [Member]
Organization And Description Of Business [Line Items]
Common Stock shares issued	21,100			21,100	21,100
Common stock shares outstanding	21,100			21,100	21,100
Class A Common Stock [Member] | IPO [Member]
Organization And Description Of Business [Line Items]
Shares issued, common stock			10,400
Shares sold, price per share		$ 14
Aggregate net proceeds from IPO		$ 131,400,000
Class A Common Stock [Member] | Over-Allotment Option [Member]
Organization And Description Of Business [Line Items]
Shares issued, common stock		1,400
Class A Common Stock [Member] | Follow-on Public Offering [Member]
Organization And Description Of Business [Line Items]
Shares issued, common stock	8,000
Shares sold, price per share	$ 21.25			$ 21.25	$ 21.25
Proceeds from sale of stock				$ 0	$ 0
Offering costs incurred				$ 700,000	$ 700,000
Class B Common Stock [Member]
Organization And Description Of Business [Line Items]
Common Stock shares issued	38,000			38,000	38,000
Common stock shares outstanding	38,000			38,000	38,000

Summary of Significant Accounti

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Significant Accounting Policies [Line Items]
Cost of revenue	$ 5,425	$ 4,062	$ 15,545	$ 11,727
Loss from operations	(2,563)	(3,850)	(16,315)	(17,471)
Net loss	(3,299)	(4,192)	(15,960)	(18,181)
Comprehensive loss	(3,354)	(4,201)	(16,209)	(18,106)
Prepaid expenses and other current assets	6,211		6,211		$ 5,013
Total assets	254,346		254,346		111,415
Accumulated deficit	(102,007)		(102,007)		$ (86,047)
Loss before provision for (benefit of) income taxes	$ (3,274)	$ (4,134)	$ (16,592)	$ (18,033)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.06)	$ (0.18)	$ (0.35)	$ (0.70)
Minimum [Member]
Significant Accounting Policies [Line Items]
Intangible assets estimated useful lives			3 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Intangible assets estimated useful lives			7 years
Restatement Adjustment [Member]
Significant Accounting Policies [Line Items]
Cost of revenue		$ 300		$ 1,100
Loss from operations		(300)		(1,100)
Net loss		(300)		(1,100)
Comprehensive loss		(300)		(1,100)
Prepaid expenses and other current assets		(1,100)		(1,100)
Total assets		(1,100)		(1,100)
Accumulated deficit		$ (1,100)		$ (1,100)
Net loss per share attributable to common stockholders, basic and diluted				$ 0.04
Scenario, Previously Reported [Member]
Significant Accounting Policies [Line Items]
Cost of revenue				$ 10,600
Loss from operations				(16,400)
Net loss				(17,100)
Comprehensive loss				(17,000)
Loss before provision for (benefit of) income taxes				$ (16,900)
Net loss per share attributable to common stockholders, basic and diluted				$ (0.66)

Business Combinations - Additio

Business Combinations - Additional Information (Detail) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2017	Sep. 30, 2017	May 31, 2017
Business Acquisition [Line Items]
Contingent earn-out consideration			$ 2,300
Business combination equity interests issued and issuable			$ 1,160
Completed Technology [Member] | Level 3 [Member]
Business Acquisition [Line Items]
Market participant tax rate			40.00%
Fair value of completed technology			$ 9,200
Weighted average amortization period			5 years 8 months 12 days
General and Administrative [Member]
Business Acquisition [Line Items]
Acquisition related costs			$ 900
Minimum [Member] | Completed Technology [Member] | Level 3 [Member]
Business Acquisition [Line Items]
Discount rate			35.00%
Maximum [Member] | Completed Technology [Member] | Level 3 [Member]
Business Acquisition [Line Items]
Discount rate			45.00%
Semanta, s.r.o [Member]
Business Acquisition [Line Items]
Business combination acquired percentage	100.00%	100.00%
Cash consideration held back for customary indemnification matters period	24 months
Contingent earn-out consideration	$ 2,300	$ 2,300
Business combination equity interests issued and issuable	1,160	1,160
Semanta, s.r.o [Member] | Class A Common Stock [Member]
Business Acquisition [Line Items]
Contingent earn-out consideration	2,300	$ 2,300
Contingent earn-out consideration payment period		2 years
Business combination equity interests issued and issuable	$ 1,200	$ 1,200
Yhat, Inc. [Member]
Business Acquisition [Line Items]
Business combination acquired percentage				100.00%

Business Combinations - Summary

Business Combinations - Summary of Purchase Consideration Related to Each Acquisition (Detail) - USD ($) $ in Thousands	1 Months Ended		9 Months Ended
	May 31, 2017	Jan. 31, 2017	Sep. 30, 2017
Business Acquisition [Line Items]
Cash Consideration Paid			$ 9,479
Equity Consideration Paid			5,285
Cash Holdback			500
Contingent Consideration Maximum			2,300
Contingent Consideration Fair Value			$ 1,160
Semanta, s.r.o [Member]
Business Acquisition [Line Items]
Month Acquired		2017-01
Cash Consideration Paid		$ 3,944
Cash Holdback		500
Contingent Consideration Maximum		2,300
Contingent Consideration Fair Value		$ 1,160
Yhat, Inc. [Member]
Business Acquisition [Line Items]
Month Acquired	2017-05
Cash Consideration Paid	$ 5,535
Equity Consideration Paid	$ 5,285

Business Combinations - Summa30

Business Combinations - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) $ in Thousands	Sep. 30, 2017USD ($)
Assets acquired and liabilities assumed:
Goodwill	$ 8,741
Semanta, s.r.o and Yhat, Inc. [Member]
Assets acquired and liabilities assumed:
Cash and cash equivalents	382
Accounts receivable	247
Prepaid expenses and other assets	68
Property and equipment	54
Intangible assets	9,220
Goodwill	8,724
Accounts payable	(479)
Accrued expenses, deferred revenue and other current liabilities	(205)
Deferred tax liability, included in other liabilities	(1,587)
Total purchase consideration	$ 16,424

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Cash and Cash Equivalents and Investments' Costs, Gross Unrealized Losses, and Fair Value by Major Security Type Recorded as Cash and Cash Equivalents or Short-Term or Long-Term Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 60,812	$ 21,394
Long-term investments	25,989
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	182,687	52,628
Gross Unrealized Gains (Losses)	(110)	72
Fair Value	182,577	52,700
Cash and Cash Equivalents	95,776	31,306
Short-term investments	60,812	21,394
Long-term investments	25,989
Fair Value, Measurements, Recurring [Member] | Cash [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	89,377	10,499
Fair Value	89,377	10,499
Cash and Cash Equivalents	89,377	10,499
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	6,399	20,807
Fair Value	6,399	20,807
Cash and Cash Equivalents	6,399	20,807
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	6,399	20,807
Fair Value	6,399	20,807
Cash and Cash Equivalents	6,399	20,807
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	86,911	21,322
Gross Unrealized Gains (Losses)	(110)	72
Fair Value	86,801	21,394
Short-term investments	60,812	21,394
Long-term investments	25,989
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Certificates of Deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	2,584	10,552
Fair Value	2,584	10,552
Short-term investments	2,584	10,552
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	31,790	10,770
Gross Unrealized Gains (Losses)	(32)	72
Fair Value	31,758	10,842
Short-term investments	30,659	$ 10,842
Long-term investments	1,099
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. Treasury and Agency Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	52,537
Gross Unrealized Gains (Losses)	(78)
Fair Value	52,459
Short-term investments	27,569
Long-term investments	$ 24,890

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017USD ($)Securityshares	Dec. 31, 2016USD ($)
Fair Value Disclosures [Line Items]
Fair value transfer between Level 1, Level 2 or Level 3	$ 0
Number of securities in an unrealized loss position for less than 12 months | Security	28
Fair value of securities in an unrealized loss position for less than 12 months	$ 77,900,000
Gross unrealized losses	$ 100,000
Business acquisition, number of shares issued to Semanta | shares	12,492
Number of shares held back | shares	4,824
Domestic Cash and Investments [Member]
Fair Value Disclosures [Line Items]
Cash and cash equivalents, restricted cash and investments	$ 166,900,000	$ 52,900,000
Minimum [Member]
Fair Value Disclosures [Line Items]
Long-term investments maturity period	1 year
Maximum [Member]
Fair Value Disclosures [Line Items]
Long-term investments maturity period	2 years

Fair Value Measurements - Recon

Fair Value Measurements - Reconciliation of Beginning and Ending Balances of Acquisition-Related Accrued Contingent Consideration (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Beginning balance	$ 1,318
Obligations assumed		$ 1,160
Change in fair value	(32)	(190)
Settlement	(375)	(375)
Ending balance	$ 975	$ 975

Cost Method Investment - Additi

Cost Method Investment - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Nov. 30, 2014
Investments Schedule [Abstract]
Cost method investment		$ 1.1
Percentage of investment		15.00%
Impairment cost	$ 1.1

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail)	1 Months Ended	9 Months Ended
	Feb. 28, 2017Vote	Sep. 30, 2017$ / sharesshares	Mar. 31, 2017$ / sharesshares	Dec. 31, 2016$ / sharesshares
Stockholders Equity Note [Line Items]
Reverse stock split ratio	2
Common stock voting rights description		The Class A common stock is entitled to one vote per share and the Class B common stock is entitled to ten votes per share.
Common stock conversion basis		Class B common stock converts to Class A common stock at any time at the option of the holder, or automatically upon the date that is the earliest of (i) the date specified by a vote of the holders of at least 66 2/3% of the outstanding shares of Class B common stock, (ii) March 29, 2027, and (iii) the date that the total number of shares of Class B common stock outstanding cease to represent at least 10% of the aggregate number of shares of Class A common stock and Class B common stock then outstanding. In addition, each share of Class B common stock will convert automatically into one share of Class A common stock upon any transfer, except for certain permitted transfers described in our restated certificate of incorporation, or the Restated Certificate.
Common stock shares authorized | shares		1,000,000,000		56,025,000
Common stock par value per share | $ / shares		$ 0.0001		$ 0.0001
Preferred stock shares authorized | shares		10,000,000		0
Preferred stock par value per share | $ / shares		$ 0.0001		$ 0.0001
Class A Common Stock [Member]
Stockholders Equity Note [Line Items]
Number of votes per share | Vote	1
Common stock shares authorized | shares			500,000,000
Common stock par value per share | $ / shares			$ 0.0001
Class B Common Stock [Member]
Stockholders Equity Note [Line Items]
Number of votes per share | Vote	10
Threshold percentage of common stock conversion	10.00%
Common stock shares authorized | shares			500,000,000
Common stock par value per share | $ / shares			$ 0.0001
Undesignated Preferred Stock [Member]
Stockholders Equity Note [Line Items]
Preferred stock shares authorized | shares			10,000,000
Preferred stock par value per share | $ / shares			$ 0.0001
Minimum [Member]
Stockholders Equity Note [Line Items]
Percentage of votes required for stock conversion	66.67%

Equity Awards - Additional Info

Equity Awards - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Feb. 28, 2017	Sep. 30, 2017
Unrecognized compensation cost related to unvested stock options		$ 11.9
Amended and Restated 2013 Stock Plan [Member]
Number of shares available for future Grant		0
Stock plan termination date		Mar. 22, 2017
Class A Common Stock [Member] | 2013 Plan [Member]
Stock reserved for issuance under equity award plans	800,000
Class A Common Stock [Member] | 2017 Equity Incentive Plan [Member]
Number of shares available for future Grant		5,400,000
Stock reserved for issuance under equity award plans	5,100,000
Class A Common Stock [Member] | 2017 Employee Stock Purchase Plan [Member]
Stock reserved for issuance under equity award plans	1,100,000
Class A Common Stock [Member] | 2017 Employee Stock Purchase Plan [Member] | Maximum [Member]
Aggregate number of shares issued	11,000,000
Common Class A and Class B [Member] | 2017 Equity Incentive Plan [Member]
Common stock outstanding percentage	5.00%
Common Class A and Class B [Member] | 2017 Employee Stock Purchase Plan [Member]
Common stock outstanding percentage	1.00%
Stock Options [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years 10 months 25 days
Restricted Stock Units [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years
Unrecognized compensation expense, adjusted for estimated forfeitures, related to unvested RSUs		$ 3.7
Pre-2017 RSU's [Member]
Awards vesting period upon service condition satisfied		4 years
Share-based compensation expense related to pre-2017 RSUs		$ 1.4
Pre-2017 RSUs vesting description		RSUs outstanding as of December 31, 2016, or pre-2017 RSUs, vest upon the satisfaction of both a service condition and a liquidity condition. The service condition for these awards will be satisfied over four years.

Equity Awards - Schedule of Sto

Equity Awards - Schedule of Stock Option Activity (Detail) shares in Thousands	9 Months Ended
	Sep. 30, 2017$ / sharesshares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options Outstanding, Beginning Balance | shares	6,318
Options Outstanding, Granted | shares	938
Options Outstanding, Exercised | shares	(1,099)
Options Outstanding, Cancelled/forfeited | shares	(538)
Options Outstanding, Ending Balance | shares	5,619
Weighted- Average Exercise Price, Beginning Balance | $ / shares	$ 5.65
Weighted- Average Exercise Price, Granted | $ / shares	16.72
Weighted- Average Exercise Price, Exercised | $ / shares	1.36
Weighted- Average Exercise Price, Cancelled/forfeited | $ / shares	8.30
Weighted- Average Exercise Price, Ending Balance | $ / shares	$ 8.08

Equity Awards - Schedule RSU Ac

Equity Awards - Schedule RSU Activity (Detail) - Restricted Stock Units [Member] shares in Thousands	9 Months Ended
	Sep. 30, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Weighted- Average Grant Date Fair Value (Per Share) Beginning Balance | $ / shares	$ 12.30
Weighted- Average Grant Date Fair Value (Per Share), Granted | $ / shares	18.10
Weighted- Average Grant Date Fair Value (Per Share), Cancelled/forfeited | $ / shares	12.67
Weighted- Average Grant Date Fair Value (Per Share), Ending Balance | $ / shares	$ 14.50
Awards Outstanding, Beginning Balance | shares	373
Awards Outstanding, Granted | shares	178
Awards Outstanding, Cancelled/forfeited | shares	(96)
Awards Outstanding, Ending Balance | shares	455

Equity Awards - Schedule of S39

Equity Awards - Schedule of Stock-based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based Compensation Expense	$ 2,279	$ 906	$ 6,509	$ 2,334
Cost of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based Compensation Expense	123	24	368	72
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based Compensation Expense	458	99	1,157	243
Sales And Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based Compensation Expense	459	308	1,642	942
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based Compensation Expense	$ 1,239	$ 475	$ 3,342	$ 1,077

Income Taxes - Schedule of Prov

Income Taxes - Schedule of Provision for (Benefit of) Income Taxes and Effective Tax Rates (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Provision for (benefit of) income taxes	$ 25	$ 58	$ (632)	$ 148
Effective tax rate	0.80%	1.40%	(3.80%)	0.80%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Taxes [Line Items]
Income tax benefit	$ 25	$ 58	$ (632)	$ 148
Intellectual Property [Member] | Yhat, Inc. [Member]
Income Taxes [Line Items]
Discrete tax benefit			$ 1,000

Basic and Diluted Net Loss Pe42

Basic and Diluted Net Loss Per Share - Schedule of Anti-dilutive Securities Excluded from Computation of Diluted Net Loss Per Share (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share	6,320	20,237	10,843	20,010
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share	5,890	5,590	6,029	5,363
Unvested Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share	418		411
Conversion of Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share		14,647	4,399	14,647
Contingently Issuable Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share	12		4

Segment and Geographic Inform43

Segment and Geographic Information - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017Segment
Segment Reporting Information [Line Items]
Number of operating segments	1
Geographic Concentration Risk [Member] | Sales Revenue, Net [Member] | International [Member] | Maximum [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	10.00%

Segment and Geographic Inform44

Segment and Geographic Information - Schedule of Revenue by Geographic Region (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Revenues	$ 34,155	$ 22,462	$ 93,019	$ 60,828
United States [Member]
Segment Reporting Information [Line Items]
Revenues	26,290	18,158	72,582	49,632
International [Member]
Segment Reporting Information [Line Items]
Revenues	$ 7,865	$ 4,304	$ 20,437	$ 11,196