Alteryx Inc - Ordinary Shares (AYX) 10-K 8 Mar 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Feb. 28, 2018	Jun. 30, 2017
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	AYX
Entity Registrant Name	Alteryx, Inc.
Entity Central Index Key	1,689,923
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Public Float			$ 331.3
Class A Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		27,669,778
Class B Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		32,553,260

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Revenue	$ 131,607	$ 85,790	$ 53,821
Cost of revenue	21,803	16,026	10,521
Gross profit	109,804	69,764	43,300
Operating expenses:
Research and development	29,342	17,481	11,103
Sales and marketing	66,420	57,585	43,244
General and administrative	32,241	17,720	10,039
Total operating expenses	128,003	92,786	64,386
Loss from operations	(18,199)	(23,022)	(21,086)
Other expense, net	(205)	(1,028)	(186)
Loss before provision for (benefit of) income taxes	(18,404)	(24,050)	(21,272)
Provision for (benefit of) income taxes	(905)	208	178
Net loss	(17,499)	(24,258)	(21,450)
Less: Accretion of Series A redeemable convertible preferred stock	(1,983)	(6,442)	(2,603)
Net loss attributable to common stockholders	$ (19,482)	$ (30,700)	$ (24,053)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.37)	$ (0.95)	$ (0.76)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted	53,006	32,440	31,697
Net loss	$ (17,499)	$ (24,258)	$ (21,450)
Other comprehensive income (loss), net of tax:
Change in net unrealized holding gains (losses) on investments, net of tax	(217)	72	(81)
Foreign currency translation adjustments, net of tax	(128)
Other comprehensive income (loss), net of tax	(345)	72	(81)
Total comprehensive loss	$ (17,844)	$ (24,186)	$ (21,531)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 119,716	$ 31,306
Short-term investments	54,386	21,394
Accounts receivable, net of allowance for doubtful accounts and sales reserves of $1,714 and $758 as of December 31, 2017 and December 31, 2016, respectively	49,797	35,367
Deferred commissions	11,213	7,358
Prepaid expenses and other current assets	7,227	5,013
Total current assets	242,339	100,438
Property and equipment, net	7,492	6,212
Long-term investments	19,964
Goodwill	8,750	0
Intangible assets, net	7,995
Restricted cash	200	200
Other assets	4,063	4,525
Deferred income taxes, net	613	40
Total assets	291,416	111,415
Current liabilities:
Accounts payable	522	1,780
Accrued payroll and payroll related liabilities	11,835	7,760
Accrued expenses and other current liabilities	7,941	4,658
Deferred revenue	110,213	71,050
Capital lease obligation	329	329
Total current liabilities	130,840	85,577
Deferred revenue	3,545	3,084
Other liabilities	3,313	1,182
Deferred income tax, net	214
Total liabilities	137,912	89,843
Commitments and contingencies (Note 15)
Redeemable convertible preferred stock, $0.0001 par value: no shares and 14,899 shares authorized as of December 31, 2017 and December 31, 2016, respectively; no shares and 14,647 shares issued and outstanding as of December 31, 2017 and December 31, 2016, respectively; aggregate liquidation preference of $0 and $87,448 of December 31, 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 December 31, 2017 and December 31, 2016, respectively; no shares issued and outstanding as of December 31, 2017 and December 31, 2016, respectively.
Additional paid-in capital	257,399	8,443
Accumulated deficit	(103,546)	(86,047)
Accumulated other comprehensive loss	(354)	(9)
Total stockholders' equity (deficit)	153,504	(77,610)
Total liabilities, redeemable convertible preferred stock, and stockholders' equity (deficit)	291,416	111,415
Class A Common Stock [Member]
Stockholders' equity (deficit):
Common stock	2
Class B Common Stock [Member]
Stockholders' equity (deficit):
Common stock	$ 3	$ 3

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Allowance for doubtful accounts and sales reserves	$ 1,714	$ 758
Redeemable convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Redeemable convertible preferred stock, shares authorized (in shares)	0	14,899,000
Redeemable convertible preferred stock, shares issued (in shares)	0	14,647,000
Redeemable convertible preferred stock, shares outstanding (in shares)	0	14,647,000
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)	10,000,000	0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A Common Stock [Member]
Common stock par value per share (in dollars per share)	$ 0.0001	$ 0.0001
Common stock shares authorized (in shares)	500,000,000	0
Common Stock shares issued (in shares)	26,687,000	0
Common stock shares outstanding (in shares)	26,687,000	0
Class B Common Stock [Member]
Common stock par value per share (in dollars per share)	$ 0.0001	$ 0.0001
Common stock shares authorized (in shares)	500,000,000	56,025,000
Common Stock shares issued (in shares)	32,948,000	32,674,000
Common stock shares outstanding (in shares)	32,948,000	32,674,000

Consolidated Statements of Rede

Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Redeemable Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Notes Receivables from Stockholders [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2014	$ (31,671)		$ 3	$ 10,902	$ (2,237)	$ (40,339)
Beginning Balance at Dec. 31, 2014		$ 41,618
Beginning Balance, Shares at Dec. 31, 2014			31,290,000
Beginning Balance, Shares at Dec. 31, 2014		11,240,000
Issuance of common stock, net of issuance costs	35,000			35,000
Issuance of convertible preferred stock, net of issuance costs		$ 49,225
Issuance of common stock, net of issuance costs, shares			2,944,000
Issuance of convertible preferred stock, net of issuance costs, shares		3,659,000
Repurchase of common stock	(35,006)			(35,006)
Repurchase of common stock, shares			(2,962,000)
Conversion of redeemable convertible preferred stock to common stock	706	$ (706)		706
Conversion of redeemable convertible preferred stock to common stock, shares		(252,000)	252,000
Accretion of Series A redeemable convertible preferred stock issuance costs and redemption feature	(2,603)			(2,603)
Accretion of Series A redeemable convertible preferred stock issuance costs and redemption feature		$ 2,603
Exercise of stock options	686			686
Ending Balance at Dec. 31, 2015		$ 92,740
Exercise of stock options, shares			734,000
Ending Balance, Shares at Dec. 31, 2015		14,647,000
Stock-based compensation	1,482			1,482
Excess tax benefit from stock-based compensation	26			26
Unrealized gain (loss) on investments	(81)						$ (81)
Net loss	(21,450)					(21,450)
Ending Balance at Dec. 31, 2015	(52,911)		$ 3	11,193	(2,237)	(61,789)	(81)
Ending Balance, Shares at Dec. 31, 2015			32,258,000
Issuance of common stock, net of issuance costs	21			21
Issuance of common stock, net of issuance costs, shares			2,000
Repurchase of common stock	(6)			(6)
Repurchase of common stock, shares			(17,000)
Accretion of Series A redeemable convertible preferred stock issuance costs and redemption feature	(6,442)			(6,442)
Accretion of Series A redeemable convertible preferred stock issuance costs and redemption feature		$ 6,442
Exercise of stock options	413			413
Ending Balance at Dec. 31, 2016	$ 99,182	$ 99,182
Exercise of stock options, shares			431,000
Ending Balance, Shares at Dec. 31, 2016	14,647,000	14,647,000
Stock-based compensation	$ 3,263			3,263
Repayment of stockholder note	2,237				$ 2,237
Excess tax benefit from stock-based compensation	1			1
Unrealized gain (loss) on investments	72						72
Net loss	(24,258)					(24,258)
Ending Balance at Dec. 31, 2016	(77,610)		$ 3	8,443		(86,047)	(9)
Ending Balance, Shares at Dec. 31, 2016			32,674,000
Issuance of common stock, net of issuance costs	131,413		$ 1	131,412
Issuance of common stock, net of issuance costs, shares			10,350,000
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
Accretion of Series A redeemable convertible preferred stock issuance costs and redemption feature	(1,983)			(1,983)
Accretion of Series A redeemable convertible preferred stock issuance costs and redemption feature		$ 1,983
Ending Balance at Dec. 31, 2017		$ 0
Shares issued pursuant to stock awards, net of shares withheld	$ 3,655			3,655
Exercise of stock options, shares	1,549,000
Ending Balance, Shares at Dec. 31, 2017	0	0
Shares issued pursuant to stock awards, shares			1,687,000
Equity issued in business combination	$ 5,285			5,285
Equity issued in business combination, shares			265,000
Stock-based compensation	8,886			8,886
Equity settled contingent consideration, value	$ 375			375
Equity settled contingent consideration, shares	12,492		12,000
Excess tax benefit from stock-based compensation	$ 162			162
Cumulative translation adjustment	(128)						(128)
Unrealized gain (loss) on investments	(217)						(217)
Net loss	(17,499)					(17,499)
Ending Balance at Dec. 31, 2017	$ 153,504		$ 5	$ 257,399		$ (103,546)	$ (354)
Ending Balance, Shares at Dec. 31, 2017			59,635,000

Consolidated Statements of Red6

Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2015
Stock issuance cost	$ 3,344
Redeemable Convertible Preferred Stock [Member]
Stock issuance cost		$ 775

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net loss	$ (17,499)	$ (24,258)	$ (21,450)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	3,957	1,677	759
Stock-based compensation	8,886	3,284	1,482
Provision for doubtful accounts and sales reserve, net of recoveries	820	432	380
Deferred income taxes	(1,425)	(27)	(12)
Loss on disposal of assets	175	66	47
Change in fair value of contingent consideration	190
Impairment of long-lived assets	1,050
Changes in operating assets and liabilities, net of effect of business acquisitions:
Accounts receivable	(15,325)	(14,248)	(6,216)
Deferred commissions	(3,663)	(1,582)	(2,233)
Prepaid expenses and other current assets and other assets	(3,508)	(4,314)	(768)
Accounts payable	(1,483)	2,134	(802)
Accrued payroll and payroll related liabilities	4,047	1,177	2,744
Accrued expenses and other current liabilities	2,444	1,122	1,908
Deferred revenue	39,835	27,840	15,252
Other liabilities	442	666	874
Net cash provided by (used in) operating activities	18,943	(6,031)	(8,035)
Cash flows from investing activities:
Purchases of property and equipment	(3,669)	(4,307)	(2,714)
Purchases of investments	(91,517)	(5,720)	(36,445)
Maturities of investments	37,862	20,762
Acquisitions, net of cash acquired	(9,097)
Change in restricted cash		1,000	(1,200)
Net cash provided by (used in) investing activities	(66,421)	11,735	(40,359)
Cash flows from financing activities:
Proceeds from initial public offering, net of underwriting commissions and discounts	134,757
Proceeds from issuance of Series C convertible preferred stock, net of issuance costs paid		(350)	49,575
Proceeds from issuance of common stock			35,000
Repurchase of common stock, net of costs paid		(256)	(34,756)
Advance from line of credit			1,875
Repayment of line of credit			(3,875)
Repayment of loans to stockholders		2,237
Principal payments on capital lease obligations	(328)	(274)
Proceeds from exercise of stock options	4,342	413	686
Minimum tax withholding paid on behalf of employees for restricted stock units	(674)
Excess tax benefit from stock-based compensation	162	1	26
Net cash provided by financing activities	135,863	823	48,531
Effect of exchange rate changes on cash	25
Net increase in cash and cash equivalents	88,410	6,527	137
Cash and cash equivalents-beginning of year	31,306	24,779	24,642
Cash and cash equivalents-end of year	119,716	31,306	24,779
Supplemental disclosure of cash flow information:
Cash paid for interest			101
Cash paid for income taxes	333	12	7
Supplemental disclosure of noncash investing and financing activities:
Property and equipment recorded in accounts payable		38	27
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	6,442	2,603
Deferred initial public offering costs included in other assets and accounts payable and accrued expense and other current liabilities		452
Property and equipment funded by capital lease borrowing		987
Conversion of redeemable convertible preferred stock to common shares	101,165		706
Repurchase of common stock costs recorded in accrued expenses and other current liabilities			250
Common Stock [Member]
Cash flows from financing activities:
Payment of initial public offering costs	(2,396)	(948)
Series C Convertible Preferred Stock [Member]
Supplemental disclosure of noncash investing and financing activities:
Series C convertible preferred stock issuance costs recorded in accrued expenses and other current liabilities			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	$ 6,442	$ 2,603

Organization and Nature of Oper

Organization and Nature of Operations	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Nature of Operations	1. Organization and Nature of Operations Our Company Alteryx, Inc. was initially organized in California in March 1997 as SRC, LLC, commenced principal operations in November 1997, changed its name to Alteryx, LLC in March 2010, and converted into a Delaware corporation in March 2011 under the name Alteryx, Inc. Alteryx, Inc. and its subsidiaries, or we, our, or us, are headquartered in Irvine, California. We are a provider of self-service data analytics software. Our software platform enables organizations to 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 benefit from data-driven decisions. The ease-of-use, Initial Public Offering and Follow-on 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 12 for further discussion of our Class A and Class B common stock. In September 2017, we completed a follow-on

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Significant Accounting Policies	2. Significant Accounting Policies Principles of Consolidation and Basis of Presentation Our consolidated financial statements are presented in accordance with accounting standards generally accepted in the United States of America, or U.S. GAAP, and include the accounts of Alteryx, Inc. and its wholly owned subsidiaries after elimination of intercompany transactions and balances. Use of Estimates The preparation of 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 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. Concentration of Risk Financial instruments, which subject us to concentrations of credit risk, consist primarily of cash and cash equivalents, investments, and trade accounts receivable. We maintain our cash and cash equivalents and investments with three major financial institutions and a portion of such balances exceed or are not subject to Federal Deposit Insurance Corporation, or FDIC, insurance limits. We extend differing levels of credit to customers, do not require collateral deposits, and, when necessary, maintain reserves for potential credit losses based upon the expected collectability of accounts receivable. We manage credit risk related to our customers by following credit approval processes, establishing credit limits, performing periodic evaluations of credit worthiness and applying other credit risk monitoring procedures. Accounts receivable include amounts due from customers with principal operations primarily in the United States. Significant customers are those which represent 10% or more of our revenue for each period presented or total net accounts receivable at each balance sheet date presented. For all years presented, we had no customer which accounted for 10% or more of our accounts receivable balance or 10% or more of our revenue. Fair Value of Financial Instruments 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 two-sided 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 Cash and Cash Equivalents and Restricted Cash We consider cash and cash equivalents to include short-term, highly liquid investments that are readily convertible to known amounts of cash and so near their maturity that they present an insignificant risk of changes in the value, including investments that mature within three months from the date of original purchase. Amounts receivable from a credit card processor of approximately $0.7 million and $0.3 million as of December 31, 2017 and 2016, respectively, are considered cash equivalents because they were both short-term and highly liquid in nature and are typically converted to cash within three days of the sales transaction. Restricted cash as of December 31, 2017 and 2016 related to amounts required to be restricted as to use by our credit card processor. Investments in Marketable Securities Our investments include available-for-sale non-current available-for-sale At each balance sheet date, we assess available-for-sale Accounts Receivable, Allowance for Doubtful Accounts, and Sales Reserves Our accounts receivable consist of amounts due from customers and are typically unsecured. Accounts receivable are recorded at the invoiced amount and are non-interest The allowance for doubtful accounts is estimated and established by assessing individual accounts receivable over a specific age and dollar value, and all other balances are pooled based on historical collection experience. Additions to the allowance are charged to general and administrative expenses. Accounts receivable are written off against the allowance when an account balance is deemed uncollectible. We estimate a sales reserve based upon the historical adjustments made to customer billings. Such reserve is recorded as a reduction of revenue and deferred revenue. Sales Commissions and Cash-Based Performance Awards Our sales personnel and other commissioned employees are paid commissions. Commissions are considered direct and incremental costs to customer agreements and are generally paid in the period we receive payment from the customer under the associated customer agreement. These costs are recoverable from future revenue associated with the noncancelable customer agreements that gave rise to the commissions. Commissions are amortized to sales and marketing expense over the term the respective revenue is recognized. For the years ended December 31, 2017, 2016, and 2015, we amortized to sales and marketing expense approximately $11.3 million, $9.4 million, and $6.4 million, respectively. Certain of our sales personnel and other commissioned employees are also eligible for annual cash-based performance awards based on overall performance of the individuals. Awards that are directly related to a specific customer agreement are amortized to sales and marketing expense over the term the respective revenue is recognized. If awards are not directly related to specific customer agreements, they are expensed to sales and marketing expense during the year they are earned commencing when the award is both probable of being earned and reasonably estimable, which generally has been in the latter part of the year. For the years ended December 31, 2017, 2016, and 2015, we recognized sales and marketing expense related to these awards of approximately $0.2 million, $1.4 million, and $1.2 million, respectively. Royalties We pay royalties associated with licensed data sold with our platform and we recognize royalty expense to cost of revenue when incurred. For the years ended December 31, 2017, 2016, and 2015, we recognized royalty expense of approximately $9.4 million, $6.0 million, and $4.1 million, respectively. Under certain of our contractual arrangements we prepay royalties. Prepaid royalties were approximately $1.1 million and $1.3 million as of December 31, 2017 and 2016, respectively, and are included in prepaid expenses and other current assets in our consolidated balance sheet. Property and Equipment Property and equipment are stated at historical cost, less accumulated depreciation and amortization. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized on a straight-line basis over the shorter of their estimated useful lives or lease terms. Useful lives by asset category are as follows: Computer equipment 3 years Furniture and fixtures 3 to 7 years Leasehold improvement Shorter of useful life or lease term Repairs and maintenance costs are charged to expense as incurred. Upon the sale or retirement of property and equipment, the cost and the related accumulated depreciation or amortization are removed from the accounts, with any resulting gain or loss included in our consolidated statement of operations and comprehensive loss. Intangible Assets Intangible assets consist primarily 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 two to eight years, using the straight-line method, which approximates the pattern in which the economic benefits are consumed. Impairment of Long-Lived Assets We review our long-lived assets for impairment whenever events or changes in circumstances indicate the carrying amount of such assets may not be fully recoverable. Recoverability of these assets is determined by comparing the forecasted undiscounted cash flows attributable to such assets to their carrying value. If the carrying value of the assets exceeds the forecasted undiscounted cash flows, then the assets are written down to their fair value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the assets. To date, no such impairments have been recorded. Business Combinations The results of businesses acquired in a business combination are included in our consolidated financial statements from the date of the acquisition. We allocated the purchase price, including the fair value of any non-cash 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 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. 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 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. At December 31, 2017, we determined our goodwill was not impaired as our fair value significantly exceeded the carrying value of our net assets. Revenue Recognition Our revenue is derived from the licensing of subscription, time-based software, sale of a hosted version of our software, data subscription services, and professional services, including training and consulting services. The time-based subscriptions include post-contract support, or PCS, which provides the customer the right to receive when-and-if-available Revenue is recognized when all four revenue recognition criteria have been met: persuasive evidence of an arrangement exists, the product has been delivered or the service has been performed, the fee is fixed or determinable, and collection is probable or reasonably assured. Determining whether and when some of these criteria have been satisfied often involves exercising judgment and using estimates and assumptions that can have a significant impact on the timing and amount of revenue that is recognized. Invoiced amounts have been recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met. We account for revenue from software and related products and services in accordance with ASC 985-605, Software We also recognize revenue from the sale of a hosted version of our platform which is delivered pursuant to a hosting arrangement. Revenue from hosted services is recognized ratably beginning on the date the services are first made available to the customer and continuing through the end of the contractual service term. Hosted revenue arrangements are outside the scope of ASC 986-605 Our arrangements may include the resale of third-party syndicated data content pursuant to subscription arrangements, and professional services. Data subscriptions provide the customer the right to receive data that is updated periodically over the term of the license agreement, and revenue is recognized ratably over the contract period once the customer has access to the data. We recognize revenue from the resale of third-party syndicated data on a gross basis when (i) we are the primary obligor, (ii) we have latitude to establish the price charged, and (iii) we bear credit risk in the transaction. Revenue from professional services, which is comprised primarily of training and consulting services, is recognized on a time and materials basis as the services are provided. Multiple Element Arrangements We enter into multiple element revenue arrangements in which a customer may purchase a combination of software, data, and services. For multiple element arrangements that contain only software and software-related elements, revenue is allocated and deferred for the undelivered elements based on their VSOE. In situations where VSOE exists for all elements (delivered and undelivered), the revenue to be earned under the arrangement among the various elements is allocated based on their relative fair value. For arrangements where VSOE exists only for the undelivered elements, the full fair value of the undelivered elements is deferred and the difference between the total arrangement fee and the amount deferred for the undelivered items is recognized as revenue. If VSOE does not exist for an undelivered service element, the revenue from the entire arrangement is recognized over the service period, once all services have commenced. Changes in assumptions or judgments or changes to the elements in a software arrangement could cause a material increase or decrease in the amount of revenue recognized in a particular period. VSOE is determined for each element, or a group of elements sold on a combined basis, such as our software and PCS, based on historical stand-alone sales to third parties or the price to be charged when the product or service, or group of products or services, is available. In determining VSOE, a substantial majority of the selling prices for a product or service must fall within a reasonably narrow pricing range. Revenue related to the delivered products or services is recognized only if (i) the above revenue recognition criteria are met, (ii) any undelivered products or services are not essential to the functionality of the delivered products and services, (iii) payment for the delivered products or services is not contingent upon delivery of the remaining products or services, and (iv) there is an enforceable claim to receive the amount due in the event that the undelivered products or services are not delivered. For multiple-element arrangements that contain both software and non-software non-software non-software Judgment is required to determine VSOE or BESP. For VSOE, we consider multiple factors including, but not limited to, product types, geographies, sales channels, and customer sizes and, for BESP, we also consider market conditions, competitive landscape, internal costs, gross margin objectives, and pricing practices. Pricing practices taken into consideration include historic contractually stated prices, volume discounts, where applicable, and price lists. BESP is generally used for offerings that are not typically sold on a stand-alone basis or when the selling prices for a product or service do not fall within a reasonably narrow pricing range. Revenue generated from sales arrangements through distributors is recognized in accordance with our revenue recognition policies as described above at the amount invoiced to the distributor. We recognize revenue at the net amount invoiced to the distributor, as opposed to the gross amount the distributor invoices their end customer, as we have determined that (i) we are not the primary obligor in these arrangements, (ii) we do not have latitude to establish the price charged to the end-customer, end-customer. Deferred Revenue Deferred revenue includes amounts collected or billed in excess of revenue recognized. Such amounts are recognized by us over the life of the contract upon meeting the revenue recognition criteria. Deferred revenue that will be recognized during the succeeding 12-month non-current Cost of Revenue Cost of revenue is accounted for in accordance with ASC 705, Cost of Sales and Services Out-of-pocket Research and Development Research and development expense consists primarily of employee-related costs, including salaries and bonuses, stock-based compensation expense, and employee benefits costs, depreciation of equipment used in research and development for our research and development employees, third-party contractor costs, and related allocated overhead costs. Product development expenses, other than software development costs qualifying for capitalization, are expensed as incurred. Software Development Costs Costs incurred in the development of new software products and enhancements to existing software products to be accounted for under software revenue recognition guidance are accounted for in accordance with ASC 985-20, Costs of Software to be Sold, Leased, or Marketed 985-20. We account for costs to develop or obtain internal-use 350-40, Internal-Use 350-40. internal-use, Internal-use internal-use Advertising Costs Advertising costs are expensed as incurred. We incurred advertising costs of approximately $5.5 million, $5.0 million, and $3.7 million for the years ended December 31, 2017, 2016, and 2015, respectively. Such costs primarily relate to our annual customer conferences, online and print advertising as well as sponsorship of public marketing events, and are reflected in sales and marketing expense in our consolidated statements of operations and comprehensive loss. Stock-Based Compensation We recognize stock-based compensation expense in accordance with the provisions of ASC 718, Compensation—Stock Compensation The determination of the grant date fair value of stock-based awards is affected by the estimated fair value per share of our common stock as well as other highly subjective assumptions, including, but not limited to, the expected term of the stock-based awards, expected stock price volatility, risk-free interest rates, and expected dividends yields, which are estimated as follows: • Fair value per share of our common stock Valuation of Privately Held Company Equity Securities Issued as Compensation. • Expected term • Expected volatility • Risk-free interest rate • Estimated dividend yield In addition, we are required to estimate at the time of grant the expected forfeiture rate and only recognize expense for those stock-based awards expected to vest. Our estimated forfeiture rate is based on our estimate of pre-vesting The assumptions used in calculating the fair value of stock-based awards represent our best estimates, but these estimates involve inherent uncertainties and the application of judgment. As a result, if factors change or we use different assumptions, stock-based compensation expense could be materially different in the future. Foreign Currency Remeasurement and Transactions The functional currency of our wholly owned subsidiaries is the currency of the primary economic environment in which the entity operates. Assets and liabilities denominated in currencies other than the functional currency are remeasured using the current exchange rate for monetary accounts and historical exchange rates for nonmonetary accounts, with exchange differences on remeasurement included in other expense in our consolidated statements of operations and comprehensive loss. Our foreign subsidiaries that utilize foreign currency as their functional currency translate such currency into U.S. Dollars using (i) the exchange rate on the balance sheet dates for assets and liabilities, (ii) the average exchange rates prevailing during the period for revenues and expenses, and (iii) historical exchange rates for equity. Any translation adjustments resulting from this process are shown separately as a component of accumulated other comprehensive income (loss) within stockholder’s equity (deficit) in the consolidated balance sheets. Transactions denominated in currencies other than the U.S. dollar may result in transaction gains or losses at the end of the period and when the related receivable or payable is settled, which are recorded in other income (expense), net. Transaction losses were $0.3 million, $0.5 million, and $0.2 million for the years ended December 31, 2017, 2016, and 2015, respectively. Income Taxes We apply the provisions of ASC 740, Income Taxes We also utilize the guidance in ASC 740 to account for uncertain tax positions. ASC 740 contains a two-step Net Loss Per Share Attributable to Common Stockholders In periods in which we have net income, we apply the two-class two-class Under the two-class Diluted earnings per share attributable to common stockholders adjusts basic earnings per share for the potentially dilutive impact of stock options and convertible preferred stock. As we have reported losses for all periods, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share. Variable Interest Entities In accordance with ASC 810, Consolidation As of December 31, 2017 and December 31, 2016, we determined that two of our distributors were VIEs under the guidance of ASC 810, Consolidation Recent Accounting Pronouncements Under the Jumpstart our Business Startups Act, or the JOBS Act, we meet the definition of an emerging growth company, or EGC. We have elected to use this extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act. 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 2016-02, right-of-use right-of-use In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers 2015-14, 2014-09

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 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 (in thousands): Company Acquired Month Cash Consideration Equity Cash Holdback Contingent Contingent Consideration Fair Value 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 The 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 year ended December 31, 2017 were not material to the consolidated financial statements. During the year ended December 31, 2017, we recognized $0.9 million of acquisition related costs in general and administrative expense in the 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 earn-out 20-day 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 consolidated financial statements.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	4. Fair Value Measurements Instruments Measured at Fair Value on a Recurring Basis. As of December 31, 2017 Cost Gross Fair Value Cash and Short-term Long-term Cash $ 100,651 $ — $ 100,651 $ 100,651 $ — $ — Level 1: Money market funds 19,065 — 19,065 19,065 — — Subtotal 19,065 — 19,065 19,065 — — Level 2: U.S. Treasury and agency bonds 44,968 (176 ) 44,792 — 25,923 18,869 Corporate bonds 29,608 (50 ) 29,558 — 28,463 1,095 Subtotal 74,576 (226 ) 74,350 — 54,386 19,964 Level 3 — — — — — — Total $ 194,292 $ (226 ) $ 194,066 $ 119,716 $ 54,386 $ 19,964 As of December 31, 2016 Cost Gross Fair Value Cash and Short-term Long-term 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 year ended December 31, 2017. As of December 31, 2017, there were 27 securities with a fair value of $74.4 million in an unrealized loss position for less than 12 months. The gross unrealized losses of $0.2 million as of December 31, 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 December 31, 2017. Cash and cash equivalents, restricted cash, and investments as of December 31, 2017 and December 31, 2016 held domestically were approximately $181.3 million and $52.9 million, respectively. Contingent Consideration. earn-out The following table presents a reconciliation of the beginning and ending balances of acquisition-related accrued contingent consideration using significant unobservable inputs (Level 3) (in thousands): Year Ended Beginning balance $ — Obligations assumed 1,160 Change in fair value 190 Settlement (375 ) Ending balance $ 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 year ended December 31, 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 Instruments Not Recorded at Fair Value on a Recurring Basis. Assets and Liabilities Recorded at Fair Value on a Non-Recurring non-recurring

Cost Method Investment

Cost Method Investment	12 Months Ended
	Dec. 31, 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

Allowance for Doubtful Accounts

Allowance for Doubtful Accounts	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Allowance for Doubtful Accounts	6. Allowance for Doubtful Accounts The following table summarizes the changes in the allowance for doubtful accounts (in thousands): Year Ended December 31, 2017 2016 2015 Beginning balance $ 670 $ 280 $ 62 Charge-offs (337 ) (97 ) (19 ) Recoveries (783 ) (283 ) (1 ) Provision 1,905 770 238 Ending balance $ 1,455 $ 670 $ 280

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Property and Equipment	7. Property and Equipment Property and equipment, net consisted of the following (in thousands): As of December 31, 2017 2016 Computer equipment & software $ 5,852 $ 4,736 Furniture and fixtures 1,812 1,910 Leasehold improvements 2,229 1,297 Construction in process 1,493 765 $ 11,386 $ 8,708 Less: Accumulated depreciation and amortization (3,894 ) (2,496 ) Total property and equipment, net $ 7,492 $ 6,212 Depreciation and amortization expense for the years ended December 31, 2017, 2016, and 2015 was approximately $2.3 million, $1.7 million, and $0.8 million, respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	8. Goodwill and Intangible Assets The change in carrying amount of goodwill for the year ended December 31, 2017 was as follows (in thousands): Goodwill as of December 31, 2016 $ — Goodwill recorded in connection with acquisitions 8,724 Effects of foreign currency translation 26 Goodwill as of December 31, 2017 $ 8,750 Intangible assets consisted of the following (in thousands, except years): As of December 31, 2017 Weighted Gross Carrying Accumulated Net Carrying Customer Relationships 2.0 $ 40 $ (12 ) $ 28 Completed Technology 5.7 9,180 (1,213 ) 7,967 $ 9,220 $ (1,225 ) $ 7,995 We classified intangible asset amortization expense in the accompanying consolidated statements of operations and comprehensive loss as follows (in thousands): Year Ended December 31, 2017 2016 2015 Cost of revenue $ 1,213 $ — $ — Sales and marketing 12 — — Total $ 1,225 $ — $ — The following table presents our estimates of remaining amortization expense for each of the five succeeding fiscal years and thereafter for finite-lived intangible assets at December 31, 2017 (in thousands): 2018 $ 1,829 2019 1,817 2020 1,503 2021 1,293 2022 747 Thereafter 806 Total amortization expense $ 7,995

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	12 Months Ended
	Dec. 31, 2017
Payables and Accruals [Abstract]
Accrued Expenses and Other Current Liabilities	9. Accrued Expenses and Other Current Liabilities Accrued commissions of approximately $4.9 million and $4.1 million as of December 31, 2017 and 2016, respectively, were included in accrued payroll and payroll-related liabilities in our consolidated balance sheets.

Notes Receivable From Stockhold

Notes Receivable From Stockholder	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Notes Receivable From Stockholder	10. Notes Receivable From Stockholder Pursuant to a Loan and Security Agreement, dated March 18, 2011, we agreed to lend Dean A. Stoecker, the Chairman of our board of directors and Chief Executive Officer, or Borrower, up to $4.2 million, or Loan, in monthly advances of $0.1 million commencing on April 1, 2011. We were obligated to make the advances until the earlier of the termination of the Borrower’s employment agreement with us or November 1, 2017. The Loan bore interest on the outstanding principal balance at the applicable federal rate, as published monthly, and the accrued, but unpaid, interest was due and payable annually, or Annual Interest, by the Borrower no later than December 31 of each year. On or before December 31 of each year, we were obligated to pay the Borrower a bonus equal to the Annual Interest plus an amount equal to the estimated income taxes which the Borrower was required to pay on the bonus. In the event that we suspended the bonus for any reason, the Borrower’s obligation to pay the Annual Interest was also suspended until such time as we resumed payment of the bonus. The Loan was secured by our common stock held by an entity affiliated with the Borrower, or the Collateral Stock, and, prior to the Modification (as described below), was due and payable in full upon the sale of all shares of the Collateral Stock or, if less than all of the shares of the Collateral Stock were sold, the net proceeds from such sale were required to be paid to us towards repayment of the Loan. On September 30, 2014, the terms of the Loan were modified, or the Modification, principally to (a) eliminate our obligation to make additional advances, (b) provide that the outstanding principal and accrued interest was due and payable upon the earlier of (i) the date that our unrestricted cash and cash equivalents was less than $15 million for more than thirty consecutive days, (ii) the date prior to the date we determine that the Loan would be deemed a prohibited loan under U.S. securities or other applicable laws, (iii) March 18, 2018, or (iv) the date of sale of any or all of the Collateral Stock, and (c) remove the restriction that limited our recourse solely to the Collateral Stock, resulting in the Loan becoming full recourse, or the Recourse Loan. The terms of the Loan were also modified to eliminate our obligations to pay the Borrower a bonus. Interest on the Loan balance continued to accrue monthly at the applicable federal rate. Concurrent with the Modification, the Borrower sold shares of common stock. As of December 31, 2015, an aggregate amount of approximately $2.3 million was outstanding pursuant to the Loan, including accrued, but unpaid, interest and 9.8 million shares held by the Borrower collateralized the Loan. The outstanding principal and accrued interest of approximately $2.3 million was fully repaid to us in November 2016. We accounted for the original issuance of the Loan secured solely by shares of common stock as a repurchase of common stock and a concurrent grant of an option to purchase the shares of common stock, or the Note Option, with an effective exercise price equal to the borrowings under the Loan. The fair value of the Note Option was not material. We accounted for the Modification of the Loan as an exercise of the Note Option through the issuance of the Recourse Loan. Prior to the Modification, the Collateral Stock was treated as treasury stock and therefore was excluded from the basic net loss per share computations.

Line of Credit

Line of Credit	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Line of Credit	11. Line of Credit On October 22, 2012, we entered into a line of credit agreement, as subsequently amended, with a commercial bank, or Bank, whereby we had a borrowing capacity of $10.0 million. Interest at the Bank’s prime rate was payable monthly. The loan was collateralized by a lien on substantially all of our assets. In December 2015, we paid off the line of credit in full and cancelled the line of credit agreement.

Redeemable Convertible Preferre

Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)	12. Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit) Redeemable Convertible Preferred Stock Upon the closing of our initial public offering in March 2017, all shares of our then-outstanding convertible preferred stock automatically converted on a one-for-one As of December 31, 2016, our convertible preferred stock consisted of the following (in thousands, except per share data): As of December 31, 2016 Shares Shares Price Net Liquidation Series A 8,238 7,986 $ 2.1850 $ 30,043 $ 17,448 Series B 3,002 3,002 6.6630 19,914 20,000 Series C 3,659 3,659 13.6632 49,225 50,000 Total 14,899 14,647 $ 99,182 $ 87,448 The rights, privileges, and preferences of the Series A redeemable convertible preferred stock, Series B convertible preferred stock, and Series C convertible preferred stock, or collectively, Preferred Stock, were as follows: Dividends Dividends on the Preferred Stock were payable only when, and if, declared by the board of directors. No dividends on the Preferred Stock were declared by our board of directors or paid since inception. Voting The holders of each share of Preferred Stock were entitled to the number of votes equal to the number of shares of common stock into which their respective shares were convertible. Liquidation In the event of our liquidation, dissolution, or winding up, the holders of Series A redeemable convertible preferred stock, Series B convertible preferred stock, and Series C convertible preferred stock were entitled to receive their full preferential amounts plus any declared but unpaid dividends prior to any distribution to the holders of common stock. Classification of Preferred Stock The deemed liquidation preference provisions of the Series A redeemable convertible preferred stock, Series B convertible preferred stock, and Series C convertible preferred stock were considered contingent redemption provisions that were not solely within our control. Accordingly, the Preferred Stock has been presented outside of permanent equity in the mezzanine portion of our consolidated balance sheets. Reverse Stock Split In February 2017, we effected a 2-to-1 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 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 were 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. Preferred Stock Our board of directors is authorized, subject to limitations prescribed by Delaware law, to issue preferred stock in one or more series, to establish from time to time the number of shares to be included in each series, and to fix the designation, powers, preferences, and rights of the shares of each series and any of its qualifications, limitations, or restrictions, in each case without further vote or action by our stockholders. As of December 31, 2017, no shares of preferred stock were outstanding. Repurchase of Common Stock In connection with the Series C convertible preferred stock financing in September 2015, we conducted a tender offer to repurchase $35.0 million outstanding shares of our common stock at a price per share of $11.887 from our employees and existing stockholders. At the close of the transaction, 2.9 million shares of common stock were tendered for an aggregate price of approximately $35.0 million.

Equity Awards

Equity Awards	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Awards	13. 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) 0.5 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 December 31, 2017, an aggregate of 5.3 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. Under the 2017 ESPP, eligible employees are allowed to purchase shares of our Class A common stock at a discount through payroll deductions of up to 15% of their eligible compensation, subject to plan limitations. Except for the first offering period, which began on the date our Registration Statement on Form S-1 th In 2017, employees purchased 0.1 million shares of Class A common stock at a price per share of $11.90. As of December 31, 2017, 1.0 million shares of Class A common stock were available for future issuance under the 2017 ESPP. Stock Options Stock options generally vest over four years and expire ten years from the date of grant. Vested stock options generally expire three months after termination of employment. We allow for early exercise of certain stock option grants. Stock option activity, excluding activity related to the ESPP, during the year ended December 31, 2017 consisted of the following (in thousands, except weighted-average information): Number of Weighted- Aggregate Weighted- Options outstanding at December 31, 2016 6,318 $ 5.65 $ 51,752 8.1 Granted 1,056 17.48 Exercised (1,549 ) 2.12 $ 25,724 Cancelled/forfeited (629 ) 8.98 Options outstanding at December 31, 2017 5,196 $ 8.70 $ 86,108 7.8 Exercisable 3,163 $ 5.39 $ 62,900 7.1 Vested and expected to vest 5,016 $ 8.50 $ 84,121 7.7 The total intrinsic value of options exercised in the years ended December 31, 2017, 2016, and 2015 was $25.7 million, $4.1 million, and $6.8 million, respectively. The intrinsic value represents the excess of the fair market value of our common stock on the date of exercise over the exercise price of each option. As of December 31, 2017, there was $11.4 million of unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted-average period of 2.8 years. Valuation Assumptions The following table presents the weighted-average assumptions used for stock options granted for each of the years indicated: Stock Options Employee Stock Purchase Plan 2017 2016 2015 2017 2016 2015 Expected term (in years) 6.1 6.0 6.0 0.4 — — Estimated volatility 42 % 41 % 56 % 29 % — — Risk-free interest rate 2 % 2 % 2 % 1 % — — Estimated dividend yield — — — — — — Weighed average fair value $ 7.53 $ 4.47 $ 4.23 $ 4.02 — — Restricted Stock Units RSUs granted under the 2017 Plan generally vest over four years and expire ten years from date of grant. RSUs will be forfeited in case of a termination of employment or service before the satisfaction of the vesting schedule. RSU activity during the year ended December 31, 2017 consisted of the following (in thousands, except weighted-average information): Awards Weighted- Aggregate RSUs outstanding at December 31, 2016 373 $ 12.30 Granted 261 20.43 Vested (71 ) 12.31 $ 1,769 Forfeited (99 ) 12.66 RSUs outstanding at December 31, 2017 464 $ 16.81 $ 11,731 RSUs outstanding as of December 31, 2016, or pre-2017 pre-2017 pre-2017 As of December 31, 2017, total unrecognized compensation expense, adjusted for estimated forfeitures, related to unvested RSUs was approximately $4.7 million, which is expected to be recognized over a weighted-average period of 2.7 years. We classified stock-based compensation expense in the accompanying consolidated statements of operations and comprehensive loss as follows (in thousands): Year Ended December 31, 2017 2016 2015 Cost of revenue $ 485 $ 106 $ 34 Research and development 1,635 338 239 Sales and marketing 2,302 1,281 800 General and administrative 4,519 1,559 409 Total $ 8,941 $ 3,284 $ 1,482

Retirement Plan

Retirement Plan	12 Months Ended
	Dec. 31, 2017
Retirement Benefits [Abstract]
Retirement Plan	14. Retirement Plan We established a savings plan that qualifies as a defined contribution plan under Section 401(k) of the Internal Revenue Code of 1986, as amended, or the Code, for the benefit of our employees. Our contributions to the savings plan are discretionary and vest immediately. We contributed approximately $1.6 million, $1.1 million, and $0.6 million to the savings plan for the years ended December 31, 2017, 2016, and 2015, respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	15. Commitments and Contingencies Leases We have various non-cancelable The aggregate undiscounted future minimum rental payments under our leases as of December 31, 2017 were as follows (in thousands): Year Ending December 31, Amounts 2018 $ 5,645 2019 6,458 2020 6,570 2021 6,304 2022 6,217 Thereafter 13,702 Total minimum lease payments $ 44,896 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 December 31, 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. Other than the matters described below, we are not currently 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. On December 19, 2017, we disclosed that individuals with an Amazon Web Services, or AWS, login could have had access to a third-party marketing dataset that provided consumer marketing information intended to help marketing professionals advertise and sell their products, or the AWS Matter. This dataset is commercially available and provides some location information, contact information and other estimated information that is used for marketing purposes. It does not include names, credit card numbers, social security numbers, bank account information or passwords. To date, four putative consumer class action lawsuits have been filed against us in U.S. federal courts relating to the AWS Matter: (1) Kacur v. Alteryx, Inc. 8:17-cv-2222 Jackson v. Alteryx, Inc. 3:17-cv-02021 Foskaris v. Alteryx, Inc. 2:17-cv-03088 Ruderman et al. v. Alteryx, Inc. 8:18-cv-00022 Kacur, Jackson, Foskaris Ruderman common-law Warranty We warrant to customers that our platform will operate substantially in accordance with its specifications. Historically, no significant costs have been incurred related to product warranties and none are expected in the future and, as such, no accruals for product warranty costs have been made.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	16. Income Taxes The components of income (loss) before provision for (benefit of) income taxes were as follows (in thousands): Year Ended December 31, 2017 2016 2015 Domestic $ 24,460 $ (24,741 ) $ (21,605 ) Foreign (42,864 ) 691 333 Total $ (18,404 ) $ (24,050 ) $ (21,272 ) The components of the provision for (benefit of) income taxes were as follows (in thousands): Year Ended December 31, 2017 2016 2015 Current: Federal $ 38 $ — $ — State 70 6 1 Foreign 297 229 189 Total current income tax expense 405 235 190 Deferred: Federal $ (1,564 ) $ — $ — State — — — Foreign 254 (27 ) (12 ) Total deferred income tax benefit (1,310 ) (27 ) (12 ) Total $ (905 ) $ 208 $ 178 For purposes of reconciling our provision for (benefit of) income taxes at the statutory rate and our provision for (benefit of) income taxes at the effective tax rate, a notional 34% tax rate was applied as follows (in thousands): Year Ended December 31, 2017 2016 2015 Income tax at federal statutory rate $ (6,257 ) $ (8,177 ) $ (7,225 ) Increase/(decrease) in tax resulting from: State income tax expense, net of federal 1,428 (716 ) (589 ) Foreign rate differential 15,375 (88 ) (46 ) Stock-based compensation (1,086 ) 602 346 Change in valuation allowance (20,500 ) 8,449 7,549 Tax impact due to tax law change 2,627 — — Change in uncertain tax position reserves 7,854 — — Current year research credits (965 ) — — Prior years research credits (1,284 ) — — Other 1,903 138 143 Total $ (905 ) $ 208 $ 178 Significant components of deferred income tax assets (liabilities) were as follows (in thousands): As of December 31, 2017 2016 Deferred revenue $ 764 $ 812 Net operating losses 5,655 28,736 Accruals and reserves 1,022 75 State taxes (212 ) (1,131 ) Deferred commissions (2,467 ) (1,837 ) Stock-based compensation 1,572 690 Fixed assets & intangibles (1,327 ) — Research & other credits 2,407 — Other 289 499 Valuation allowance (7,304 ) (27,804 ) Net non-current $ 399 $ 40 We have evaluated the available positive and negative evidence supporting the realization of our gross deferred tax assets, including our cumulative losses, and the amount and timing of future taxable income. Accordingly, we recorded a valuation allowance against our U.S. federal and state deferred tax assets to the extent that they are not expected to be recoverable as of December 31, 2017 and 2016. The changes in the valuation allowance were as follows (in thousands): Year Ended December 31, 2017 2016 2015 Beginning balance $ 27,804 $ 19,355 $ 11,806 Decrease in valuation allowance due to Yhat acquisition (998 ) — — Increase (decrease) in valuation allowance (19,502 ) 8,449 7,549 Ending balance $ 7,304 $ 27,804 $ 19,355 As of December 31, 2017, we had U.S. federal and state income tax net operating loss carryforwards of approximately $55.4 million and $20.3 million, respectively. The U.S. federal and state net operating losses will begin to expire in 2034 and 2025, respectively, unless previously utilized. As of December 31, 2017 and 2016, our pre-tax paid-in Under Sections 382 and 383 of the Internal Revenue Code, annual use of our net operating loss carryforwards and tax credits may be limited if a cumulative change in ownership of more than 50% occurs within a three-year period. We determined that such an ownership change occurred in 2015. This ownership change resulted in limitations of the annual utilization of our net operating loss carryforwards, but did not result in permanent disallowance of any of our net operating loss carryforwards. On December 22, 2017, the Tax Cuts and Jobs Act of 2017, or the Tax Act became law. The legislation adopts significant changes to the Internal Revenue Code that include, among other things, reduction of the corporate income tax rate from 35% to 21%, effective for tax years beginning after December 31, 2017, the transition of U.S. international taxation from a worldwide tax system to a territorial system, and imposition of a one-time one-time We have not accrued U.S. income taxes or foreign withholding taxes on the earnings of our foreign subsidiaries, as these amounts are intended to be indefinitely reinvested in operations outside the United States. As of December 31, 2017, there are no cumulative amounts of undistributed earnings at our foreign subsidiaries. We are subject to taxation in the United States and various states and international jurisdictions. Our U.S. federal tax returns are open for examination for tax years 2014 and forward, and our state tax returns are open for examination for tax years 2013 and forward. Our tax returns for international jurisdictions are open for examination for tax years 2013 and forward. However, net operating loss and other tax attribute carryforwards utilized in subsequent years continue to be subject to examination by the tax authorities until the year to which the net operating loss and/or other tax attributes are carried forward is no longer subject to examination. Neither we nor any of our subsidiaries are currently under examination from tax authorities in the jurisdictions in which we do business. For the year ended December 31, 2017 we recorded unrecognized tax benefits of approximately $5.8 million pertaining to transfer pricing. If fully recognized, the unrecognized tax benefits would not have an impact on our effective tax rate. We recorded no unrecognized tax benefits for each of the years ended December 31, 2016 and 2015. We had no accrual for interest or penalties related to uncertain tax positions in our consolidated balance sheets as of December 31, 2017 and 2016, and have not recognized interest or penalties in our consolidated statement of operations and comprehensive loss for the years ended December 31, 2017, 2016, and 2015. A rollforward of the activity in the gross unrecognized tax benefits is as follows: Year Ended Balance at beginning of year $ — Additions based on tax positions related to the current year 5,624 Additions for tax positions of prior years 170 Balance at end of year $ 5,794

Basic and Diluted Net Loss Per

Basic and Diluted Net Loss Per Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Basic and Diluted Net Loss Per Share	17. Basic and Diluted Net Loss Per Share As we reported losses attributable to common stockholders for all periods presented, all potentially dilutive shares of common stock are antidilutive for those periods. 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): Year Ended December 31, 2017 2016 2015 Options to purchase common stock 5,897 5,516 5,045 Unvested restricted stock units 415 — — Conversion of convertible preferred stock 3,290 14,647 12,198 Contingently issuable shares 7 — — Total shares excluded from net loss per share 9,609 20,163 17,243

Segment and Geographic Informat

Segment and Geographic Information	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Segment and Geographic Information	18. 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, France, 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): Year Ended December 31, 2017 2016 2015 United States $ 101,932 $ 69,420 $ 46,078 International 29,675 16,370 7,743 Total $ 131,607 $ 85,790 $ 53,821 No countries outside the United States comprised more than 10% of revenue for any of the periods presented. As of December 31, 2017 and 2016, substantially all of our property and equipment was located in the United States

Selected Quarterly Financial Da

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	19. Selected Quarterly Financial Data (Unaudited) The following table sets forth unaudited quarterly financial information for the years ended December 31, 2017 and 2016. We have prepared the unaudited quarterly consolidated statements of operations data on a basis consistent with the audited annual consolidated financial statements. In the opinion of management, the financial information in this table reflects all adjustments, consisting of normal and recurring adjustments, necessary for the fair statement of this data (in thousands except per share data): 2017 Quarter Ended March 31 June 30 September 30 December 31 Revenue $ 28,545 $ 30,319 $ 34,155 $ 38,588 Gross margin $ 23,719 $ 25,025 $ 28,730 $ 32,330 Loss from operations $ (5,614 ) $ (8,138 ) $ (2,563 ) $ (1,884 ) Net loss $ (5,667 ) $ (6,994 ) $ (3,299 ) $ (1,539 ) Basic and diluted loss per share $ (0.22 ) $ (0.12 ) $ (0.06 ) $ (0.03 ) 2016 Quarter Ended March 31 June 30 September 30 December 31 Revenue $ 18,394 $ 19,972 $ 22,462 $ 24,962 Gross margin $ 14,495 $ 16,206 $ 18,400 $ 20,663 Loss from operations $ (6,406 ) $ (7,215 ) $ (3,850 ) $ (5,551 ) Net loss $ (6,533 ) $ (7,456 ) $ (4,192 ) $ (6,077 ) Basic and diluted loss per share $ (0.24 ) $ (0.28 ) $ (0.18 ) $ (0.25 )

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	20. Subsequent Events In February 2018, we acquired 100% of the outstanding equity of Alteryx ANZ Pty Limited in Sydney, Australia, our exclusive master distributor in Australia and New Zealand. The total purchase price for the acquisition was approximately $3.3 million in cash and up to $1.5 million in cash paid over two years contingent upon the achievement of specified milestones. Given the timing of the completion of the acquisition, we are currently in the process of valuing the assets acquired and liabilities assumed in the acquisition. As a result, we are unable to provide the amounts recognized as of the acquisition date for the major classes of assets acquired and liabilities assumed and other disclosures.

Significant Accounting Polici28

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation Our consolidated financial statements are presented in accordance with accounting standards generally accepted in the United States of America, or U.S. GAAP, and include the accounts of Alteryx, Inc. and its wholly owned subsidiaries after elimination of intercompany transactions and balances.
Use of Estimates	Use of Estimates The preparation of 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 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.
Concentration of Risk	Concentration of Risk Financial instruments, which subject us to concentrations of credit risk, consist primarily of cash and cash equivalents, investments, and trade accounts receivable. We maintain our cash and cash equivalents and investments with three major financial institutions and a portion of such balances exceed or are not subject to Federal Deposit Insurance Corporation, or FDIC, insurance limits. We extend differing levels of credit to customers, do not require collateral deposits, and, when necessary, maintain reserves for potential credit losses based upon the expected collectability of accounts receivable. We manage credit risk related to our customers by following credit approval processes, establishing credit limits, performing periodic evaluations of credit worthiness and applying other credit risk monitoring procedures. Accounts receivable include amounts due from customers with principal operations primarily in the United States. Significant customers are those which represent 10% or more of our revenue for each period presented or total net accounts receivable at each balance sheet date presented. For all years presented, we had no customer which accounted for 10% or more of our accounts receivable balance or 10% or more of our revenue.
Fair Value of Financial Instruments	Fair Value of Financial Instruments 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 two-sided 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
Cash and Cash Equivalents and Restricted Cash	Cash and Cash Equivalents and Restricted Cash We consider cash and cash equivalents to include short-term, highly liquid investments that are readily convertible to known amounts of cash and so near their maturity that they present an insignificant risk of changes in the value, including investments that mature within three months from the date of original purchase. Amounts receivable from a credit card processor of approximately $0.7 million and $0.3 million as of December 31, 2017 and 2016, respectively, are considered cash equivalents because they were both short-term and highly liquid in nature and are typically converted to cash within three days of the sales transaction. Restricted cash as of December 31, 2017 and 2016 related to amounts required to be restricted as to use by our credit card processor.
Investments in Marketable Securities	Investments in Marketable Securities Our investments include available-for-sale marketable securities. The classification of investments is determined at the time of purchase and reevaluated at each balance sheet date. We classify investments as current or non-current based on the nature of the securities as well as their stated maturities. Investments are stated at fair value. The net unrealized gains or losses on available-for-sale securities are recorded as a component of accumulated other comprehensive loss, net of income taxes. At each balance sheet date, we assess available-for-sale securities in an unrealized loss position to determine whether the unrealized loss is other than temporary. We consider factors including the significance of the decline in value as compared to the cost basis, underlying factors contributing to a decline in the prices of securities in a single asset class, how long the market value of the security has been less than its cost basis, the security’s relative performance versus its peers, sector or asset class, expected market volatility, and the market and economy in general, and, if determined to be other than temporary, will record an other than temporary impairment charge.
Accounts Receivable, Allowance for Doubtful Accounts, and Sales Reserves	Accounts Receivable, Allowance for Doubtful Accounts, and Sales Reserves Our accounts receivable consist of amounts due from customers and are typically unsecured. Accounts receivable are recorded at the invoiced amount and are non-interest bearing. The allowance for doubtful accounts is estimated and established by assessing individual accounts receivable over a specific age and dollar value, and all other balances are pooled based on historical collection experience. Additions to the allowance are charged to general and administrative expenses. Accounts receivable are written off against the allowance when an account balance is deemed uncollectible. We estimate a sales reserve based upon the historical adjustments made to customer billings. Such reserve is recorded as a reduction of revenue and deferred revenue.
Sales Commissions and Cash-Based Performance Awards	Sales Commissions and Cash-Based Performance Awards Our sales personnel and other commissioned employees are paid commissions. Commissions are considered direct and incremental costs to customer agreements and are generally paid in the period we receive payment from the customer under the associated customer agreement. These costs are recoverable from future revenue associated with the noncancelable customer agreements that gave rise to the commissions. Commissions are amortized to sales and marketing expense over the term the respective revenue is recognized. For the years ended December 31, 2017, 2016, and 2015, we amortized to sales and marketing expense approximately $11.3 million, $9.4 million, and $6.4 million, respectively. Certain of our sales personnel and other commissioned employees are also eligible for annual cash-based performance awards based on overall performance of the individuals. Awards that are directly related to a specific customer agreement are amortized to sales and marketing expense over the term the respective revenue is recognized. If awards are not directly related to specific customer agreements, they are expensed to sales and marketing expense during the year they are earned commencing when the award is both probable of being earned and reasonably estimable, which generally has been in the latter part of the year. For the years ended December 31, 2017, 2016, and 2015, we recognized sales and marketing expense related to these awards of approximately $0.2 million, $1.4 million, and $1.2 million, respectively.
Royalties	Royalties We pay royalties associated with licensed data sold with our platform and we recognize royalty expense to cost of revenue when incurred. For the years ended December 31, 2017, 2016, and 2015, we recognized royalty expense of approximately $9.4 million, $6.0 million, and $4.1 million, respectively. Under certain of our contractual arrangements we prepay royalties. Prepaid royalties were approximately $1.1 million and $1.3 million as of December 31, 2017 and 2016, respectively, and are included in prepaid expenses and other current assets in our consolidated balance sheet.
Property and Equipment	Property and Equipment Property and equipment are stated at historical cost, less accumulated depreciation and amortization. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized on a straight-line basis over the shorter of their estimated useful lives or lease terms. Useful lives by asset category are as follows: Computer equipment 3 years Furniture and fixtures 3 to 7 years Leasehold improvement Shorter of useful life or lease term Repairs and maintenance costs are charged to expense as incurred. Upon the sale or retirement of property and equipment, the cost and the related accumulated depreciation or amortization are removed from the accounts, with any resulting gain or loss included in our consolidated statement of operations and comprehensive loss.
Intangible Assets	Intangible Assets Intangible assets consist primarily 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 two to eight years, using the straight-line method, which approximates the pattern in which the economic benefits are consumed.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets We review our long-lived assets for impairment whenever events or changes in circumstances indicate the carrying amount of such assets may not be fully recoverable. Recoverability of these assets is determined by comparing the forecasted undiscounted cash flows attributable to such assets to their carrying value. If the carrying value of the assets exceeds the forecasted undiscounted cash flows, then the assets are written down to their fair value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the assets. To date, no such impairments have been recorded.
Business Combinations	Business Combinations The results of businesses acquired in a business combination are included in our consolidated financial statements from the date of the acquisition. We allocated the purchase price, including the fair value of any non-cash 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 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.
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 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. At December 31, 2017, we determined our goodwill was not impaired as our fair value significantly exceeded the carrying value of our net assets.
Revenue Recognition	Revenue Recognition Our revenue is derived from the licensing of subscription, time-based software, sale of a hosted version of our software, data subscription services, and professional services, including training and consulting services. The time-based subscriptions include post-contract support, or PCS, which provides the customer the right to receive when-and-if-available unspecified future updates, upgrades and enhancements, and technical product support. Revenue is recognized when all four revenue recognition criteria have been met: persuasive evidence of an arrangement exists, the product has been delivered or the service has been performed, the fee is fixed or determinable, and collection is probable or reasonably assured. Determining whether and when some of these criteria have been satisfied often involves exercising judgment and using estimates and assumptions that can have a significant impact on the timing and amount of revenue that is recognized. Invoiced amounts have been recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met. We account for revenue from software and related products and services in accordance with ASC 985-605, Software We also recognize revenue from the sale of a hosted version of our platform which is delivered pursuant to a hosting arrangement. Revenue from hosted services is recognized ratably beginning on the date the services are first made available to the customer and continuing through the end of the contractual service term. Hosted revenue arrangements are outside the scope of ASC 986-605 software revenue recognition guidance as customers do not have the right to take possession of the software code underlying our hosted solutions. Our arrangements may include the resale of third-party syndicated data content pursuant to subscription arrangements, and professional services. Data subscriptions provide the customer the right to receive data that is updated periodically over the term of the license agreement, and revenue is recognized ratably over the contract period once the customer has access to the data. We recognize revenue from the resale of third-party syndicated data on a gross basis when (i) we are the primary obligor, (ii) we have latitude to establish the price charged, and (iii) we bear credit risk in the transaction. Revenue from professional services, which is comprised primarily of training and consulting services, is recognized on a time and materials basis as the services are provided. Multiple Element Arrangements We enter into multiple element revenue arrangements in which a customer may purchase a combination of software, data, and services. For multiple element arrangements that contain only software and software-related elements, revenue is allocated and deferred for the undelivered elements based on their VSOE. In situations where VSOE exists for all elements (delivered and undelivered), the revenue to be earned under the arrangement among the various elements is allocated based on their relative fair value. For arrangements where VSOE exists only for the undelivered elements, the full fair value of the undelivered elements is deferred and the difference between the total arrangement fee and the amount deferred for the undelivered items is recognized as revenue. If VSOE does not exist for an undelivered service element, the revenue from the entire arrangement is recognized over the service period, once all services have commenced. Changes in assumptions or judgments or changes to the elements in a software arrangement could cause a material increase or decrease in the amount of revenue recognized in a particular period. VSOE is determined for each element, or a group of elements sold on a combined basis, such as our software and PCS, based on historical stand-alone sales to third parties or the price to be charged when the product or service, or group of products or services, is available. In determining VSOE, a substantial majority of the selling prices for a product or service must fall within a reasonably narrow pricing range. Revenue related to the delivered products or services is recognized only if (i) the above revenue recognition criteria are met, (ii) any undelivered products or services are not essential to the functionality of the delivered products and services, (iii) payment for the delivered products or services is not contingent upon delivery of the remaining products or services, and (iv) there is an enforceable claim to receive the amount due in the event that the undelivered products or services are not delivered. For multiple-element arrangements that contain both software and non-software elements, revenue is allocated on a relative fair value basis to software or software-related elements as a group and any non-software elements separately based on the selling price hierarchy. The selling price for each deliverable is determined using VSOE of selling price, if it exists, or third-party evidence of fair value, or TPE. If neither VSOE nor TPE exist for a deliverable, best estimate of selling price, or BESP, is used. Once revenue is allocated to software or software-related elements as a group, revenue is recognized in accordance with software revenue accounting guidance. Revenue allocated to non-software elements is recognized in accordance with SAB Topic 13, Revenue Recognition. Revenue is recognized when revenue recognition criteria are met for each element. Judgment is required to determine VSOE or BESP. For VSOE, we consider multiple factors including, but not limited to, product types, geographies, sales channels, and customer sizes and, for BESP, we also consider market conditions, competitive landscape, internal costs, gross margin objectives, and pricing practices. Pricing practices taken into consideration include historic contractually stated prices, volume discounts, where applicable, and price lists. BESP is generally used for offerings that are not typically sold on a stand-alone basis or when the selling prices for a product or service do not fall within a reasonably narrow pricing range. Revenue generated from sales arrangements through distributors is recognized in accordance with our revenue recognition policies as described above at the amount invoiced to the distributor. We recognize revenue at the net amount invoiced to the distributor, as opposed to the gross amount the distributor invoices their end customer, as we have determined that (i) we are not the primary obligor in these arrangements, (ii) we do not have latitude to establish the price charged to the end-customer, and (iii) we do not bear credit risk in the transaction with the end-customer.
Deferred Revenue	Deferred Revenue Deferred revenue includes amounts collected or billed in excess of revenue recognized. Such amounts are recognized by us over the life of the contract upon meeting the revenue recognition criteria. Deferred revenue that will be recognized during the succeeding 12-month period is recorded as current deferred revenue and the remaining portion is recorded as non-current deferred revenue in our consolidated balance sheet.
Cost of Revenue	Cost of Revenue Cost of revenue is accounted for in accordance with ASC 705, Cost of Sales and Services
Research and Development	Research and Development Research and development expense consists primarily of employee-related costs, including salaries and bonuses, stock-based compensation expense, and employee benefits costs, depreciation of equipment used in research and development for our research and development employees, third-party contractor costs, and related allocated overhead costs. Product development expenses, other than software development costs qualifying for capitalization, are expensed as incurred.
Software Development Costs	Software Development Costs Costs incurred in the development of new software products and enhancements to existing software products to be accounted for under software revenue recognition guidance are accounted for in accordance with ASC 985-20, Costs of Software to be Sold, Leased, or Marketed We account for costs to develop or obtain internal-use software in accordance with ASC 350-40, Internal-Use Software
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred. We incurred advertising costs of approximately $5.5 million, $5.0 million, and $3.7 million for the years ended December 31, 2017, 2016, and 2015, respectively. Such costs primarily relate to our annual customer conferences, online and print advertising as well as sponsorship of public marketing events, and are reflected in sales and marketing expense in our consolidated statements of operations and comprehensive loss.
Stock-Based Compensation	Stock-Based Compensation We recognize stock-based compensation expense in accordance with the provisions of ASC 718, Compensation—Stock Compensation The determination of the grant date fair value of stock-based awards is affected by the estimated fair value per share of our common stock as well as other highly subjective assumptions, including, but not limited to, the expected term of the stock-based awards, expected stock price volatility, risk-free interest rates, and expected dividends yields, which are estimated as follows: • Fair value per share of our common stock Valuation of Privately Held Company Equity Securities Issued as Compensation. • Expected term • Expected volatility • Risk-free interest rate • Estimated dividend yield In addition, we are required to estimate at the time of grant the expected forfeiture rate and only recognize expense for those stock-based awards expected to vest. Our estimated forfeiture rate is based on our estimate of pre-vesting award forfeitures. The assumptions used in calculating the fair value of stock-based awards represent our best estimates, but these estimates involve inherent uncertainties and the application of judgment. As a result, if factors change or we use different assumptions, stock-based compensation expense could be materially different in the future.
Foreign Currency Remeasurement and Transactions	Foreign Currency Remeasurement and Transactions The functional currency of our wholly owned subsidiaries is the currency of the primary economic environment in which the entity operates. Assets and liabilities denominated in currencies other than the functional currency are remeasured using the current exchange rate for monetary accounts and historical exchange rates for nonmonetary accounts, with exchange differences on remeasurement included in other expense in our consolidated statements of operations and comprehensive loss. Our foreign subsidiaries that utilize foreign currency as their functional currency translate such currency into U.S. Dollars using (i) the exchange rate on the balance sheet dates for assets and liabilities, (ii) the average exchange rates prevailing during the period for revenues and expenses, and (iii) historical exchange rates for equity. Any translation adjustments resulting from this process are shown separately as a component of accumulated other comprehensive income (loss) within stockholder’s equity (deficit) in the consolidated balance sheets. Transactions denominated in currencies other than the U.S. dollar may result in transaction gains or losses at the end of the period and when the related receivable or payable is settled, which are recorded in other income (expense), net. Transaction losses were $0.3 million, $0.5 million, and $0.2 million for the years ended December 31, 2017, 2016, and 2015, respectively.
Income Taxes	Income Taxes We apply the provisions of ASC 740, Income Taxes We also utilize the guidance in ASC 740 to account for uncertain tax positions. ASC 740 contains a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount which is more likely than not to be realized and effectively settled. We consider many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately reflect actual outcomes. We recognize interest and penalties on unrecognized tax benefits as a component of income tax expense in our consolidated statement of operations and comprehensive loss.
Net Loss Per Share Attributable to Common Stockholders	Net Loss Per Share Attributable to Common Stockholders In periods in which we have net income, we apply the two-class two-class Under the two-class Diluted earnings per share attributable to common stockholders adjusts basic earnings per share for the potentially dilutive impact of stock options and convertible preferred stock. As we have reported losses for all periods, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share.
Variable Interest Entities	Variable Interest Entities In accordance with ASC 810, Consolidation As of December 31, 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 Under the Jumpstart our Business Startups Act, or the JOBS Act, we meet the definition of an emerging growth company, or EGC. We have elected to use this extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act. 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 2016-02, right-of-use right-of-use In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers 2015-14, 2014-09
Notes Receivable From Stockholder	We accounted for the original issuance of the Loan secured solely by shares of common stock as a repurchase of common stock and a concurrent grant of an option to purchase the shares of common stock, or the Note Option, with an effective exercise price equal to the borrowings under the Loan. The fair value of the Note Option was not material. We accounted for the Modification of the Loan as an exercise of the Note Option through the issuance of the Recourse Loan. Prior to the Modification, the Collateral Stock was treated as treasury stock and therefore was excluded from the basic net loss per share computations.
Segment and Geographic Information	18. 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.

Significant Accounting Polici29

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Summary of Useful Lives of Assets	Useful lives by asset category are as follows: Computer equipment 3 years Furniture and fixtures 3 to 7 years Leasehold improvement Shorter of useful life or lease term

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Dec. 31, 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 (in thousands): Company Acquired Month Cash Consideration Equity Cash Holdback Contingent Contingent Consideration Fair Value 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)	12 Months Ended
	Dec. 31, 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 December 31, 2017 and December 31, 2016 (in thousands): As of December 31, 2017 Cost Gross Fair Value Cash and Short-term Long-term Cash $ 100,651 $ — $ 100,651 $ 100,651 $ — $ — Level 1: Money market funds 19,065 — 19,065 19,065 — — Subtotal 19,065 — 19,065 19,065 — — Level 2: U.S. Treasury and agency bonds 44,968 (176 ) 44,792 — 25,923 18,869 Corporate bonds 29,608 (50 ) 29,558 — 28,463 1,095 Subtotal 74,576 (226 ) 74,350 — 54,386 19,964 Level 3 — — — — — — Total $ 194,292 $ (226 ) $ 194,066 $ 119,716 $ 54,386 $ 19,964 As of December 31, 2016 Cost Gross Fair Value Cash and Short-term Long-term 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) (in thousands): Year Ended Beginning balance $ — Obligations assumed 1,160 Change in fair value 190 Settlement (375 ) Ending balance $ 975

Allowance for Doubtful Accoun32

Allowance for Doubtful Accounts (Tables)	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Summary of Changes in the Allowance for Doubtful Accounts	The following table summarizes the changes in the allowance for doubtful accounts (in thousands): Year Ended December 31, 2017 2016 2015 Beginning balance $ 670 $ 280 $ 62 Charge-offs (337 ) (97 ) (19 ) Recoveries (783 ) (283 ) (1 ) Provision 1,905 770 238 Ending balance $ 1,455 $ 670 $ 280

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Property and equipment, net	Property and equipment, net consisted of the following (in thousands): As of December 31, 2017 2016 Computer equipment & software $ 5,852 $ 4,736 Furniture and fixtures 1,812 1,910 Leasehold improvements 2,229 1,297 Construction in process 1,493 765 $ 11,386 $ 8,708 Less: Accumulated depreciation and amortization (3,894 ) (2,496 ) Total property and equipment, net $ 7,492 $ 6,212

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Change in Carrying Amount of Goodwill	The change in carrying amount of goodwill for the year ended December 31, 2017 was as follows (in thousands): Goodwill as of December 31, 2016 $ — Goodwill recorded in connection with acquisitions 8,724 Effects of foreign currency translation 26 Goodwill as of December 31, 2017 $ 8,750
Schedule of Intangible Assets	Intangible assets consisted of the following (in thousands, except years): As of December 31, 2017 Weighted Gross Carrying Accumulated Net Carrying Customer Relationships 2.0 $ 40 $ (12 ) $ 28 Completed Technology 5.7 9,180 (1,213 ) 7,967 $ 9,220 $ (1,225 ) $ 7,995
Schedule of Intangible Asset Amortization Expense	We classified intangible asset amortization expense in the accompanying consolidated statements of operations and comprehensive loss as follows (in thousands): Year Ended December 31, 2017 2016 2015 Cost of revenue $ 1,213 $ — $ — Sales and marketing 12 — — Total $ 1,225 $ — $ —
Schedule of Finite-Lived Intangible Assets Estimated Remaining Amortization Expense	The following table presents our estimates of remaining amortization expense for each of the five succeeding fiscal years and thereafter for finite-lived intangible assets at December 31, 2017 (in thousands): 2018 $ 1,829 2019 1,817 2020 1,503 2021 1,293 2022 747 Thereafter 806 Total amortization expense $ 7,995

Redeemable Convertible Prefer35

Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Schedule of Convertible Preferred Stock	As of December 31, 2016, our convertible preferred stock consisted of the following (in thousands, except per share data): As of December 31, 2016 Shares Shares Price Net Liquidation Series A 8,238 7,986 $ 2.1850 $ 30,043 $ 17,448 Series B 3,002 3,002 6.6630 19,914 20,000 Series C 3,659 3,659 13.6632 49,225 50,000 Total 14,899 14,647 $ 99,182 $ 87,448

Equity Awards (Tables)

Equity Awards (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock Option Activity	Stock option activity, excluding activity related to the ESPP, during the year ended December 31, 2017 consisted of the following (in thousands, except weighted-average information): Number of Weighted- Aggregate Weighted- Options outstanding at December 31, 2016 6,318 $ 5.65 $ 51,752 8.1 Granted 1,056 17.48 Exercised (1,549 ) 2.12 $ 25,724 Cancelled/forfeited (629 ) 8.98 Options outstanding at December 31, 2017 5,196 $ 8.70 $ 86,108 7.8 Exercisable 3,163 $ 5.39 $ 62,900 7.1 Vested and expected to vest 5,016 $ 8.50 $ 84,121 7.7
Schedule of Weighted-average Assumption Used for Stock Options	The following table presents the weighted-average assumptions used for stock options granted for each of the years indicated: Stock Options Employee Stock Purchase Plan 2017 2016 2015 2017 2016 2015 Expected term (in years) 6.1 6.0 6.0 0.4 — — Estimated volatility 42 % 41 % 56 % 29 % — — Risk-free interest rate 2 % 2 % 2 % 1 % — — Estimated dividend yield — — — — — — Weighed average fair value $ 7.53 $ 4.47 $ 4.23 $ 4.02 — —
Schedule of RSU Activity	RSU activity during the year ended December 31, 2017 consisted of the following (in thousands, except weighted-average information): Awards Weighted- Aggregate RSUs outstanding at December 31, 2016 373 $ 12.30 Granted 261 20.43 Vested (71 ) 12.31 $ 1,769 Forfeited (99 ) 12.66 RSUs outstanding at December 31, 2017 464 $ 16.81 $ 11,731
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): Year Ended December 31, 2017 2016 2015 Cost of revenue $ 485 $ 106 $ 34 Research and development 1,635 338 239 Sales and marketing 2,302 1,281 800 General and administrative 4,519 1,559 409 Total $ 8,941 $ 3,284 $ 1,482

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule of Undiscounted Future Minimum Rental Payment Under Non-Cancelable Operating Leases	The aggregate undiscounted future minimum rental payments under our leases as of December 31, 2017 were as follows (in thousands): Year Ending December 31, Amounts 2018 $ 5,645 2019 6,458 2020 6,570 2021 6,304 2022 6,217 Thereafter 13,702 Total minimum lease payments $ 44,896

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Components of Income (Loss) Before Provision for (Benefit of) Income Taxes	The components of income (loss) before provision for (benefit of) income taxes were as follows (in thousands): Year Ended December 31, 2017 2016 2015 Domestic $ 24,460 $ (24,741 ) $ (21,605 ) Foreign (42,864 ) 691 333 Total $ (18,404 ) $ (24,050 ) $ (21,272 )
Components of Provision for (Benefit of) Income Taxes	The components of the provision for (benefit of) income taxes were as follows (in thousands): Year Ended December 31, 2017 2016 2015 Current: Federal $ 38 $ — $ — State 70 6 1 Foreign 297 229 189 Total current income tax expense 405 235 190 Deferred: Federal $ (1,564 ) $ — $ — State — — — Foreign 254 (27 ) (12 ) Total deferred income tax benefit (1,310 ) (27 ) (12 ) Total $ (905 ) $ 208 $ 178
Reconciliation of Provision for (Benefit of) Income Taxes at Statutory Rate and Provision for (Benefit of) Income Taxes	For purposes of reconciling our provision for (benefit of) income taxes at the statutory rate and our provision for (benefit of) income taxes at the effective tax rate, a notional 34% tax rate was applied as follows (in thousands): Year Ended December 31, 2017 2016 2015 Income tax at federal statutory rate $ (6,257 ) $ (8,177 ) $ (7,225 ) Increase/(decrease) in tax resulting from: State income tax expense, net of federal 1,428 (716 ) (589 ) Foreign rate differential 15,375 (88 ) (46 ) Stock-based compensation (1,086 ) 602 346 Change in valuation allowance (20,500 ) 8,449 7,549 Tax impact due to tax law change 2,627 — — Change in uncertain tax position reserves 7,854 — — Current year research credits (965 ) — — Prior years research credits (1,284 ) — — Other 1,903 138 143 Total $ (905 ) $ 208 $ 178
Significant Components of Deferred Income Tax Assets (Liabilities)	Significant components of deferred income tax assets (liabilities) were as follows (in thousands): As of December 31, 2017 2016 Deferred revenue $ 764 $ 812 Net operating losses 5,655 28,736 Accruals and reserves 1,022 75 State taxes (212 ) (1,131 ) Deferred commissions (2,467 ) (1,837 ) Stock-based compensation 1,572 690 Fixed assets & intangibles (1,327 ) — Research & other credits 2,407 — Other 289 499 Valuation allowance (7,304 ) (27,804 ) Net non-current $ 399 $ 40
Summary of Changes in the Valuation Allowance	The changes in the valuation allowance were as follows (in thousands): Year Ended December 31, 2017 2016 2015 Beginning balance $ 27,804 $ 19,355 $ 11,806 Decrease in valuation allowance due to Yhat acquisition (998 ) — — Increase (decrease) in valuation allowance (19,502 ) 8,449 7,549 Ending balance $ 7,304 $ 27,804 $ 19,355
Schedule of Activity in Gross Unrecognized Tax Benefits	A rollforward of the activity in the gross unrecognized tax benefits is as follows: Year Ended Balance at beginning of year $ — Additions based on tax positions related to the current year 5,624 Additions for tax positions of prior years 170 Balance at end of year $ 5,794

Basic and Diluted Net Loss Pe39

Basic and Diluted Net Loss Per Share (Tables)	12 Months Ended
	Dec. 31, 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): Year Ended December 31, 2017 2016 2015 Options to purchase common stock 5,897 5,516 5,045 Unvested restricted stock units 415 — — Conversion of convertible preferred stock 3,290 14,647 12,198 Contingently issuable shares 7 — — Total shares excluded from net loss per share 9,609 20,163 17,243

Segment and Geographic Inform40

Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Schedule of Revenue by Geographic Region	The following sets forth our revenue by geographic region (in thousands): Year Ended December 31, 2017 2016 2015 United States $ 101,932 $ 69,420 $ 46,078 International 29,675 16,370 7,743 Total $ 131,607 $ 85,790 $ 53,821

Selected Quarterly Financial 41

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Data	The following table sets forth unaudited quarterly financial information for the years ended December 31, 2017 and 2016. We have prepared the unaudited quarterly consolidated statements of operations data on a basis consistent with the audited annual consolidated financial statements. In the opinion of management, the financial information in this table reflects all adjustments, consisting of normal and recurring adjustments, necessary for the fair statement of this data (in thousands except per share data): 2017 Quarter Ended March 31 June 30 September 30 December 31 Revenue $ 28,545 $ 30,319 $ 34,155 $ 38,588 Gross margin $ 23,719 $ 25,025 $ 28,730 $ 32,330 Loss from operations $ (5,614 ) $ (8,138 ) $ (2,563 ) $ (1,884 ) Net loss $ (5,667 ) $ (6,994 ) $ (3,299 ) $ (1,539 ) Basic and diluted loss per share $ (0.22 ) $ (0.12 ) $ (0.06 ) $ (0.03 ) 2016 Quarter Ended March 31 June 30 September 30 December 31 Revenue $ 18,394 $ 19,972 $ 22,462 $ 24,962 Gross margin $ 14,495 $ 16,206 $ 18,400 $ 20,663 Loss from operations $ (6,406 ) $ (7,215 ) $ (3,850 ) $ (5,551 ) Net loss $ (6,533 ) $ (7,456 ) $ (4,192 ) $ (6,077 ) Basic and diluted loss per share $ (0.24 ) $ (0.28 ) $ (0.18 ) $ (0.25 )

Organization and Nature of Op42

Organization and Nature of Operations - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended		2 Months Ended	12 Months Ended
	Sep. 30, 2017	Apr. 30, 2017	Apr. 30, 2017	Dec. 31, 2017	Dec. 31, 2015
Organization And Description Of Business [Line Items]
Aggregate net proceeds from IPO				$ 134,757,000
Proceeds from sale of stock					$ 35,000,000
Class A Common Stock [Member] | IPO [Member]
Organization And Description Of Business [Line Items]
Shares issued, common stock			10.4
Shares sold, price per share		$ 14	$ 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		1.4
Class A Common Stock [Member] | Follow-on Public Offering [Member]
Organization And Description Of Business [Line Items]
Shares issued, common stock	8
Shares sold, price per share	$ 21.25
Proceeds from sale of stock				0
Offering costs incurred				$ 700,000

Significant Accounting Polici43

Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Feb. 28, 2018
Significant Accounting Policies [Line Items]
Amounts receivable from a credit card processor	$ 0.7	$ 0.3
Recognized royalty expense	9.4	6	$ 4.1
Prepaid royalties	1.1	1.3
Advertising Expenses	5.5	5	3.7
Transaction losses	$ (0.3)	$ (0.5)	$ (0.2)
Alteryx ANZ Pty Limited [Member] | Subsequent Event [Member]
Significant Accounting Policies [Line Items]
Business combination acquired percentage				100.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
Intangible assets estimated useful lives	2 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Intangible assets estimated useful lives	8 years
Sales Revenue, Net [Member] | Product Concentration Risk [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Percentage of revenue concentration	90.00%	90.00%	90.00%
Sales And Marketing [Member]
Significant Accounting Policies [Line Items]
Amortized to sales and marketing expense	$ 11.3	$ 9.4	$ 6.4
Sales And Marketing [Member] | Deferred Bonus [Member]
Significant Accounting Policies [Line Items]
Cash-based performance awards	$ 0.2	$ 1.4	$ 1.2

Significant Accounting Polici44

Significant Accounting Policies - Schedule Useful lives by asset category (Detail)	12 Months Ended
	Dec. 31, 2017
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	7 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	Shorter of useful life or lease term

Business Combinations - Additio

Business Combinations - Additional Information (Detail) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2017	Dec. 31, 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]
Business Acquisition [Line Items]
Weighted average amortization period			5 years 8 months 12 days
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		12 Months Ended
	May 31, 2017	Jan. 31, 2017	Dec. 31, 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 - Summa47

Business Combinations - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets acquired and liabilities assumed:
Goodwill	$ 8,750	$ 0
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	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 54,386	$ 21,394
Long-term investments	19,964
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	194,292	52,628
Gross Unrealized Gains (Losses)	(226)	72
Fair Value	194,066	52,700
Cash and Cash Equivalents	119,716	31,306
Short-term investments	54,386	21,394
Long-term investments	19,964
Fair Value, Measurements, Recurring [Member] | Cash [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	100,651	10,499
Fair Value	100,651	10,499
Cash and Cash Equivalents	100,651	10,499
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	19,065	20,807
Fair Value	19,065	20,807
Cash and Cash Equivalents	19,065	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	19,065	20,807
Fair Value	19,065	20,807
Cash and Cash Equivalents	19,065	20,807
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	74,576	21,322
Gross Unrealized Gains (Losses)	(226)	72
Fair Value	74,350	21,394
Short-term investments	54,386	21,394
Long-term investments	19,964
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		10,552
Fair Value		10,552
Short-term investments		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	29,608	10,770
Gross Unrealized Gains (Losses)	(50)	72
Fair Value	29,558	10,842
Short-term investments	28,463	$ 10,842
Long-term investments	1,095
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	44,968
Gross Unrealized Gains (Losses)	(176)
Fair Value	44,792
Short-term investments	25,923
Long-term investments	$ 18,869

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail)	12 Months Ended
	Dec. 31, 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	27
Fair value of securities in an unrealized loss position for less than 12 months	$ 74,400,000
Gross unrealized losses	$ 200,000
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	$ 181,300,000	$ 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) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Fair Value Disclosures [Abstract]
Beginning balance	$ 0
Obligations assumed	1,160
Change in fair value	(190)
Settlement	(375)
Ending balance	$ 975

Cost Method Investment - Additi

Cost Method Investment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Nov. 30, 2014
Investments Schedule [Abstract]
Cost method investment		$ 1.1
Percentage of investment		15.00%
Impairment cost	$ 1.1

Allowance for Doubtful Accoun52

Allowance for Doubtful Accounts - Summary of Changes in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning balance	$ 670	$ 280	$ 62
Charge-offs	(337)	(97)	(19)
Recoveries	(783)	(283)	(1)
Provision	1,905	770	238
Ending balance	$ 1,455	$ 670	$ 280

Property and Equipment - Schedu

Property and Equipment - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 11,386	$ 8,708
Less: Accumulated depreciation and amortization	(3,894)	(2,496)
Total property and equipment, net	7,492	6,212
Computer Equipment & Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	5,852	4,736
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	1,812	1,910
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	2,229	1,297
Construction in Process [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 1,493	$ 765

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 2.3	$ 1.7	$ 0.8

Goodwill and Intangible Asset55

Goodwill and Intangible Assets - Schedule of Change in Carrying Amount of Goodwill (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill beginning balance	$ 0
Goodwill recorded in connection with acquisitions	8,724
Effects of foreign currency translation	26
Goodwill ending balance	$ 8,750

Goodwill and Intangible Asset56

Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 9,220
Accumulated Amortization	(1,225)
Net Carrying Value	$ 7,995
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life in Years	2 years
Gross Carrying Value	$ 40
Accumulated Amortization	(12)
Net Carrying Value	$ 28
Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life in Years	5 years 8 months 12 days
Gross Carrying Value	$ 9,180
Accumulated Amortization	(1,213)
Net Carrying Value	$ 7,967

Goodwill and Intangible Asset57

Goodwill and Intangible Assets - Schedule of Intangible Asset Amortization Expense (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 1,225
Cost of Revenue [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	1,213
Sales And Marketing [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 12

Goodwill and Intangible Asset58

Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets Estimated Remaining Amortization Expense (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,018	$ 1,829
2,019	1,817
2,020	1,503
2,021	1,293
2,022	747
Thereafter	806
Net Carrying Value	$ 7,995

Accrued Expenses and Other Cu59

Accrued Expenses and Other Current Liabilities - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Accrued Expenses and Other Current Liabilities [Member]
Accrued commissions expense approximately	$ 4.9	$ 4.1

Notes Receivable from Stockho60

Notes Receivable from Stockholder - Additional Information (Detail) shares in Millions	Sep. 30, 2014USD ($)d	Nov. 30, 2016USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2015USD ($)shares	Dec. 31, 2014USD ($)	Mar. 18, 2011USD ($)
Related Party Transaction [Line Items]
Cash and cash equivalents			$ 31,306,000	$ 119,716,000	$ 24,779,000	$ 24,642,000
Repayment of loans to stockholders			$ 2,237,000
Chief Executive Officer [Member]
Related Party Transaction [Line Items]
Loan maximum limit							$ 4,200,000
Loan monthly limit							$ 100,000
Note receivable and accrued interest from officer					$ 2,300,000
Common shares outstanding | shares					9.8
Repayment of loans to stockholders		$ 2,300,000
Chief Executive Officer [Member] | Notes Receivables from Stockholders [Member]
Related Party Transaction [Line Items]
Number of consecutive days threshold for unrestricted cash and cash equivalent to be less than $15 million and not trigger early repayment of debt | d	30
Chief Executive Officer [Member] | Notes Receivables from Stockholders [Member] | Minimum [Member]
Related Party Transaction [Line Items]
Cash and cash equivalents	$ 15,000,000

Line Of Credit - Additional Inf

Line Of Credit - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Oct. 22, 2012
Line of Credit Facility [Abstract]
Line of credit, borrowing capacity		$ 10,000,000
Line of credit, orgination date	Oct. 22, 2012
Interest payment terms	Interest at the Bank's prime rate was payable monthly.
Line Of Credit Frequency Of Payments	Monthly
Line Of Credit Collateral	The loan was collateralized by a lien on substantially all of our assets

Redeemable Convertible Prefer62

Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - Additional Information (Detail) $ / shares in Units, $ in Thousands	1 Months Ended		12 Months Ended
	Feb. 28, 2017Vote	Sep. 30, 2015USD ($)$ / sharesshares	Dec. 31, 2017$ / sharesshares	Dec. 31, 2016USD ($)$ / sharesshares	Dec. 31, 2015USD ($)shares	Mar. 31, 2017$ / sharesshares
Stockholders Equity Note [Line Items]
Conversion basis of convertible preferred stock into common stock upon closing of initial public offering			One-for-one
Reverse stock split ratio	0.5
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.
Preferred stock shares authorized			10,000,000	0
Preferred stock par value per share | $ / shares			$ 0.0001	$ 0.0001
Preferred stock, shares outstanding			0	0
common stock repurchased during period, value | $				$ 6	$ 35,006
Payment for repurchase of common stock | $				$ 256	$ 34,756
Common Stock [Member]
Stockholders Equity Note [Line Items]
Common stock repurchased, per share price | $ / shares		$ 11.887
common stock repurchased during period, shares		2,900,000		17,000	2,962,000
common stock repurchased during period, value | $		$ 35,000
Payment for repurchase of common stock | $		$ 35,000
Class A Common Stock [Member]
Stockholders Equity Note [Line Items]
Number of votes per share | Vote	1
Common stock shares authorized			500,000,000	0		500,000,000
Common stock par value per share | $ / shares			$ 0.0001	$ 0.0001		$ 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			500,000,000	56,025,000		500,000,000
Common stock par value per share | $ / shares			$ 0.0001	$ 0.0001		$ 0.0001
Undesignated Preferred Stock [Member]
Stockholders Equity Note [Line Items]
Preferred stock shares authorized						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%

Redeemable Convertible Prefer63

Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - Convertible Preferred Stock (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Temporary Equity [Line Items]
Shares Authorized	0	14,899
Shares Outstanding	0	14,647
Net Carrying Value		$ 99,182
Liquidation Preference	$ 0	$ 87,448
Series A Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Shares Authorized		8,238
Shares Outstanding		7,986
Price Per Share		$ 2.1850
Net Carrying Value		$ 30,043
Liquidation Preference		$ 17,448
Series B Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Shares Authorized		3,002
Shares Outstanding		3,002
Price Per Share		$ 6.6630
Net Carrying Value		$ 19,914
Liquidation Preference		$ 20,000
Series C Redeemable Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Shares Authorized		3,659
Shares Outstanding		3,659
Price Per Share		$ 13.6632
Net Carrying Value		$ 49,225
Liquidation Preference		$ 50,000

Equity Awards - Additional Info

Equity Awards - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2017	Feb. 28, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Total intrinsic value of options exercised			$ 25,724	$ 4,100	$ 6,800
Amended and Restated 2013 Stock Plan [Member]
Number of shares available for future Grant	0		0
Stock plan termination date			Mar. 22, 2017
Stock Options [Member]
Awards vesting period upon service condition satisfied			4 years
Awards expiration period from date of grant			10 years
Unrecognized compensation cost related to unvested stock options	$ 11,400		$ 11,400
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			2 years 9 months 18 days
Restricted Stock Units [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			2 years 8 months 12 days
Unrecognized compensation expense, adjusted for estimated forfeitures, related to unvested RSUs	$ 4,700		$ 4,700
Restricted Stock Units [Member] | Two Thousand Seventeen Plan [Member]
Awards vesting period upon service condition satisfied			4 years
Awards expiration period from date of grant			10 years
Pre-2017 RSU's [Member]
Awards vesting period upon service condition satisfied			4 years
Share-based compensation expense related to pre-2017 RSUs			$ 1,800
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.
Class A Common Stock [Member] | 2017 Equity Incentive Plan [Member]
Number of shares available for future Grant	5,300,000		5,300,000
Stock reserved for issuance under equity award plans		5,100,000
Equity award plan, description		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.
Class A Common Stock [Member] | 2013 Plan [Member]
Stock reserved for issuance under equity award plans		500,000
Class A Common Stock [Member] | 2017 Employee Stock Purchase Plan [Member]
Number of shares available for future Grant	1,000,000		1,000,000
Stock reserved for issuance under equity award plans		1,100,000
Equity award plan, description		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.
Percentage of maximum deduction of eligible compensation	15.00%		15.00%
Stock issued during period, shares, employee stock purchase plans	100,000
Common stock par value per share (in dollars per share)	$ 11.90		$ 11.90
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%
Awards vesting period upon service condition satisfied			6 months
Percentage of purchase price of common stock			85.00%

Equity Awards - Schedule of Sto

Equity Awards - Schedule of Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options Outstanding, Beginning Balance	6,318
Granted	1,056
Exercised	(1,549)
Cancelled/forfeited	(629)
Options Outstanding, Ending Balance	5,196	6,318
Exercisable	3,163
Vested and expected to vest	5,016
Weighted- Average Exercise Price, Beginning Balance	$ 5.65
Weighted- Average Exercise Price, Granted	17.48
Weighted- Average Exercise Price, Exercised	2.12
Weighted- Average Exercise Price, Cancelled/forfeited	8.98
Weighted- Average Exercise Price, Ending Balance	8.70	$ 5.65
Exercisable	5.39
Vested and expected to vest	$ 8.50
Aggregate Intrinsic value, Exercised	$ 25,724	$ 4,100	$ 6,800
Aggregate Intrinsic value, Options outstanding, Beginning balance	86,108	$ 51,752
Aggregate Intrinsic Value, Exercisable	62,900
Aggregate Intrinsic Value, Vested and expected to vest	$ 84,121
Weighted- Average Remaining Contractual Term, Options outstanding	7 years 9 months 18 days	8 years 1 month 6 days
Weighted- Average Remaining Contractual Term, Exercisable	7 years 1 month 6 days
Weighted- Average Remaining Contractual Term, Vested and expected to vest	7 years 8 months 12 days

Equity Awards - Schedule of Wei

Equity Awards - Schedule of Weighted-average Assumption Used for Stock Options (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	6 years 1 month 6 days	6 years	6 years
Estimated volatility	42.00%	41.00%	56.00%
Risk-free interest rate	2.00%	2.00%	2.00%
Estimated dividend yield	0.00%	0.00%	0.00%
Weighed average fair value	$ 7.53	$ 4.47	$ 4.23
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	4 months 24 days	0 years	0 years
Estimated volatility	29.00%
Risk-free interest rate	1.00%
Estimated dividend yield	0.00%	0.00%	0.00%
Weighed average fair value	$ 4.02

Equity Awards - Schedule RSU Ac

Equity Awards - Schedule RSU Activity (Detail) - Restricted Stock Units [Member] $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Awards Outstanding, Beginning Balance | shares	373
Awards Outstanding, Granted | shares	261
Awards Outstanding, Vested | shares	(71)
Awards Outstanding, Cancelled/forfeited | shares	(99)
Awards Outstanding, Ending Balance | shares	464
Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 12.30
Weighted Average Grant Date Fair Value, Granted | $ / shares	20.43
Weighted Average Grant Date Fair Value, vested | $ / shares	12.31
Weighted Average Grant Date Fair Value, forfeited | $ / shares	12.66
Weighted Average Grant Date Fair Value, Ending Balance | $ / shares	$ 16.81
Aggregate Intrinsic Value, Vested | $	$ 1,769
Aggregate Intrinsic Value, Ending Balance | $	$ 11,731

Equity Awards - Schedule of S68

Equity Awards - Schedule of Stock-based Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based Compensation Expense	$ 8,941	$ 3,284	$ 1,482
Cost of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based Compensation Expense	485	106	34
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based Compensation Expense	1,635	338	239
Sales And Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based Compensation Expense	2,302	1,281	800
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based Compensation Expense	$ 4,519	$ 1,559	$ 409

Retirement Plan - Additional In

Retirement Plan - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Contribution Plan [Abstract]
Contributed to savings plan	$ 1.6	$ 1.1	$ 0.6

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Operating leases Expiration, Year	2,025
Total rent expense under operating leases	$ 4.1	$ 2.7	$ 1.3

Commitments and Contingencies71

Commitments and Contingencies - Future Minimum Rental Payments for Leases (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,018	$ 5,645
2,019	6,458
2,020	6,570
2,021	6,304
2,022	6,217
Thereafter	13,702
Total minimum lease payments	$ 44,896

Income Taxes - Components of In

Income Taxes - Components of Income (Loss) Before Provision for (Benefit of) Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Domestic	$ 24,460	$ (24,741)	$ (21,605)
Foreign	(42,864)	691	333
Loss before provision for (benefit of) income taxes	$ (18,404)	$ (24,050)	$ (21,272)

Income Taxes - Components of Pr

Income Taxes - Components of Provision for (Benefit of) Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal	$ 38
State	70	$ 6	$ 1
Foreign	297	229	189
Total current income tax expense	405	235	190
Deferred:
Federal	(1,564)
State	0	0	0
Foreign	254	(27)	(12)
Total deferred income tax benefit	(1,310)	(27)	(12)
Total	$ (905)	$ 208	$ 178

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Nov. 02, 2017
Income Taxes [Line Items]
Effective tax rate of statutory		34.00%	34.00%	34.00%
Pre-tax unrecognized tax benefits related to stock-based compensation expense		$ 5,794,000	$ 0
Change in tax rate, deferred tax assets valuation allowance		2,600,000
Change in tax rate, income tax expense		0
Cumulative foreign earnings		0			$ 0
Amount which would impact effective tax rate		5,800,000
Accrued interest and penalties related to uncertain tax positions		0	0
Income tax penalties and interest expense related to uncertain tax positions		0	0	$ 0
Stock Based Compensation Expense [Member]
Income Taxes [Line Items]
Pre-tax unrecognized tax benefits related to stock-based compensation expense		13,600,000	$ 11,000,000
Domestic Tax Authority [Member]
Income Taxes [Line Items]
Income tax net operating loss carryforwards		$ 55,400,000
Operating loss carryforwards expiration date		Begin to expire in 2034
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Income tax net operating loss carryforwards		$ 20,300,000
Operating loss carryforwards expiration date		Begin to expire in 2025
Tax Cuts and Jobs Act [Member]
Income Taxes [Line Items]
Effective tax rate of statutory		35.00%
Tax Cuts and Jobs Act [Member] | Scenario, Forecast [Member]
Income Taxes [Line Items]
Effective tax rate of statutory	21.00%

Income Taxes - Schedule of Prov

Income Taxes - Schedule of Provision for (Benefit of) Income Taxes and Effective Tax Rates (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income tax at federal statutory rate	$ (6,257)	$ (8,177)	$ (7,225)
State income tax expense, net of federal	1,428	(716)	(589)
Foreign rate differential	15,375	(88)	(46)
Stock-based compensation	(1,086)	602	346
Change in valuation allowance	(20,500)	8,449	7,549
Tax impact due to tax law change	2,627
Change in uncertain tax position reserves	7,854
Current year research credits	(965)
Prior years research credits	(1,284)
Other	1,903	138	143
Total	$ (905)	$ 208	$ 178

Income Taxes - Components of De

Income Taxes - Components of Deferred Income Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Components of Deferred Tax Assets and Liabilities [Abstract]
Deferred revenue	$ 764	$ 812
Net operating losses	5,655	28,736
Accruals and reserves	1,022	75
State taxes	(212)	(1,131)
Deferred commissions	(2,467)	(1,837)
Stock-based compensation	1,572	690
Fixed assets & intangibles	(1,327)
Research & other credits	2,407
Other	289	499
Valuation allowance	(7,304)	(27,804)	$ (19,355)	$ (11,806)
Net non-current deferred tax assets	$ 399	$ 40

Income Taxes - Change in Valuat

Income Taxes - Change in Valuation Allowance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Line Items]
Beginning balance	$ 27,804	$ 19,355	$ 11,806
Increase (decrease) in valuation allowance	(19,502)	8,449	7,549
Ending balance	7,304	$ 27,804	$ 19,355
Yhat, Inc. [Member]
Income Tax Disclosure [Line Items]
Increase (decrease) in valuation allowance	$ (998)

Income Taxes - Schedule of Acti

Income Taxes - Schedule of Activity in Gross Unrecognized Tax Benefits (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 0
Additions based on tax positions related to the current year	5,624,000
Additions for tax positions of prior years	170,000
Balance at end of year	$ 5,794,000

Basic and Diluted Net Loss Pe79

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	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share	9,609	20,163	17,243
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share	5,897	5,516	5,045
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share	415
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	3,290	14,647	12,198
Contingently Issuable Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded from net loss per share	7

Segment and Geographic Inform80

Segment and Geographic Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 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 Inform81

Segment and Geographic Information - Schedule of Revenue by Geographic Region (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 38,588	$ 34,155	$ 30,319	$ 28,545	$ 24,962	$ 22,462	$ 19,972	$ 18,394	$ 131,607	$ 85,790	$ 53,821
United States [Member]
Segment Reporting Information [Line Items]
Revenues									101,932	69,420	46,078
International [Member]
Segment Reporting Information [Line Items]
Revenues									$ 29,675	$ 16,370	$ 7,743

Selected Quarterly Financial 82

Selected Quarterly Financial Data - Schedule of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 38,588	$ 34,155	$ 30,319	$ 28,545	$ 24,962	$ 22,462	$ 19,972	$ 18,394	$ 131,607	$ 85,790	$ 53,821
Gross margin	32,330	28,730	25,025	23,719	20,663	18,400	16,206	14,495	109,804	69,764	43,300
Loss from operations	(1,884)	(2,563)	(8,138)	(5,614)	(5,551)	(3,850)	(7,215)	(6,406)	(18,199)	(23,022)	(21,086)
Net loss	$ (1,539)	$ (3,299)	$ (6,994)	$ (5,667)	$ (6,077)	$ (4,192)	$ (7,456)	$ (6,533)	$ (17,499)	$ (24,258)	$ (21,450)
Basic and diluted loss per share	$ (0.03)	$ (0.06)	$ (0.12)	$ (0.22)	$ (0.25)	$ (0.18)	$ (0.28)	$ (0.24)	$ (0.37)	$ (0.95)	$ (0.76)

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Feb. 28, 2018	Dec. 31, 2017
Subsequent Event [Line Items]
Business combination, purchase price in cash		$ 9,479
Contingent consideration paid in cash		$ 2,300
Alteryx ANZ Pty Limited [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Business combination acquired percentage	100.00%
Business combination, purchase price in cash	$ 3,300
Contingent consideration paid in cash	$ 1,500
Contingent consideration period	2 years