Sailpoint Technologies 10-K 18 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Mar. 11, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Trading Symbol	SAIL
Entity Registrant Name	SailPoint Technologies Holdings, Inc.
Entity Central Index Key	0001627857
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Well-known Seasoned Issuer	Yes
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding (in shares)		88,525,881
Entity Public Float			$ 29,837,816

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 70,964	$ 83,315	$ 81,809	$ 130,859	$ 116,049	$ 116,049
Restricted cash	6,272	121	120	126	78	78
Accounts receivable	101,469	70,765	54,507	55,300	72,552	72,907
Prepayments and other current assets	21,850	18,445	17,329	16,463	15,861	10,013
Total current assets	200,555	176,045	159,606	203,912	204,540	199,047
Property and equipment, net	19,268	10,103	3,595	3,126	3,018	3,018
Deferred tax asset - non-current						264
Other non-current assets	20,374	18,343	17,429	16,196	16,774	3,542
Goodwill	219,377	219,377	219,377	219,377	219,377	219,377
Intangible assets, net	74,860	74,567	76,773	78,979	81,185	81,185
Total assets	534,434	498,435	476,780	521,590	524,894	506,433
Current liabilities
Accounts payable	4,636	3,036	2,894	1,872	2,231	2,231
Accrued expenses and other liabilities	21,731	17,547	12,639	11,145	22,636	22,636
Income taxes payable	2,143				1,688	1,688
Deferred revenue - current	95,919	80,247	75,243	68,739	64,163	73,671
Total current liabilities	124,429	110,499	90,776	81,756	90,718	100,226
Deferred tax liability - non-current	4,142	5,422	5,422	5,422	5,422
Long-term debt			9,640	68,321	68,329	68,329
Other long-term liabilities	9,788	4,404	51	65	27	27
Deferred revenue - non-current	18,382	13,954	13,805	12,919	10,240	9,454
Total liabilities	156,741	134,279	119,694	168,483	174,736	178,036
Commitments and contingencies (Note 6)
Stockholders’ equity
Common stock, $0.0001 par value, authorized 300,000,000 shares, issued and outstanding 87,512,175 and 84,948,126 shares at December 31, 2018 and 2017, respectively	9	9	9	9	8	8
Preferred stock, $0.0001 par value, authorized 10,000,000 shares, no shares issued and outstanding at December 31, 2018 and 2017
Additional paid in capital	377,473	369,079	363,818	358,858	353,609	353,609
Retained earnings (accumulated deficit)	211	(4,932)	(6,741)	(5,760)	(3,459)	(25,220)
Total stockholders' equity	377,693	364,156	357,086	353,107	350,158	328,397	$ (13,884)	$ (11,859)
Total liabilities and stockholders’ equity	$ 534,434	$ 498,435	$ 476,780	$ 521,590	$ 524,894	$ 506,433

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	87,512,175	84,948,126
Common stock, shares outstanding	87,512,175	84,948,126
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue
Total revenue	$ 248,920	$ 186,056	$ 132,412
Cost of revenue
Total cost of revenue	54,670	44,590	37,038
Gross profit	194,250	141,466	95,374
Operating expenses
Research and development	43,154	33,331	24,358
General and administrative	34,781	17,678	9,680
Sales and marketing	105,402	80,514	58,607
Total operating expenses	183,337	131,523	92,645
Income from operations	10,913	9,943	2,729
Other expense, net:
Interest expense, net	(4,707)	(14,783)	(7,277)
Other, net	(1,446)	(459)	(610)
Total other expense, net	(6,153)	(15,242)	(7,887)
Income (loss) before income taxes	4,760	(5,299)	(5,158)
Income tax (expense) benefit	(1,090)	(2,293)	1,985
Net income (loss)	3,670	(7,592)	(3,173)
Net income (loss) available to common stockholders	$ 3,641	$ (28,721)	$ (26,791)
Net income (loss) per share
Basic	$ 0.04	$ (0.55)	$ (0.58)
Diluted	$ 0.04	$ (0.55)	$ (0.58)
Weighted average shares outstanding
Basic	86,495,301	52,339,804	45,933,218
Diluted	90,002,752	52,339,804	45,933,218
Licenses
Revenue
Total revenue	$ 105,000	$ 79,209	$ 54,395
Cost of revenue
Total cost of revenue	4,634	4,561	4,278
Subscription
Revenue
Total revenue	104,033	71,007	49,364
Cost of revenue
Total cost of revenue	20,734	16,406	13,051
Service and other
Revenue
Total revenue	39,887	35,840	28,653
Cost of revenue
Total cost of revenue	$ 29,302	$ 23,623	$ 19,709

CONSOLIDATED STATEMENTS OF REDE

CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Redeemable Convertible Preferred Stock	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)
Temporary Equity Balance at Dec. 31, 2015		$ 222,898
Temporary Equity Balance, Shares at Dec. 31, 2015		222,898
Stockholders' Equity Balance at Dec. 31, 2015	$ (11,859)		$ 4		$ 2,592	$ (14,455)
Stockholders' Equity Balance, shares at Dec. 31, 2015			44,736,300
Issuance of common stock	66				66
Issuance of preferred and common stock, shares		1,263	36,079
Issuance of preferred stock		$ 1,263
Repurchase of preferred and common stock	(52)				(52)
Repurchase of common and preferred stock, shares		(174)	(62,402)
Repurchase of preferred and common stock		$ (174)
Exercise of stock options	18				18
Exercise of stock options, shares			10,568
Capital contribution	459				459
Stock-based compensation expense	568				568
Incentive units vested	89		$ 1		88
Incentive units vested, shares			1,676,824
Net Income (loss)	(3,173)					(3,173)
Temporary Equity Balance at Dec. 31, 2016		$ 223,987
Temporary Equity Balance, Shares at Dec. 31, 2016		223,987
Stockholders' Equity Balance at Dec. 31, 2016	(13,884)		$ 5		3,739	(17,628)
Stockholders' Equity Balance, shares at Dec. 31, 2016			46,397,369
Issuance of common stock	171,980		$ 1		171,979
Issuance of preferred and common stock, shares			15,800,000
Conversion of preferred stock to common stock upon initial public offering	173,429		$ 2		173,427
Conversion of preferred stock to common stock upon initial public offering, shares		(223,816)	20,500,400
Conversion of preferred stock to common stock upon initial public offering		$ (173,429)
Repurchase of preferred and common stock	(487)			$ (487)
Repurchase of common and preferred stock, shares		(171)
Repurchase of preferred and common stock		$ (171)
Repurchase of preferred and common stock, shares				190,434
Exercise of stock options	359				359
Exercise of stock options, shares			160,680
Preferred dividend payment		$ (50,387)
Treasury stock activity				$ 487	(487)
Treasury stock activity, shares			(112,772)	(190,434)
Stock-based compensation expense	4,514				4,514
Incentive units vested	78				78
Incentive units vested, shares			2,202,449
Net Income (loss)	(7,592)					(7,592)
Stockholders' Equity Balance at Dec. 31, 2017	328,397		$ 8		353,609	(25,220)
Stockholders' Equity Balance, shares at Dec. 31, 2017			84,948,126
Net Income (loss) | Accounting Standards Update 2014-09	(2,302)
Stockholders' Equity Balance at Mar. 31, 2018	353,107
Stockholders' Equity Balance at Dec. 31, 2017	328,397		$ 8		353,609	(25,220)
Stockholders' Equity Balance, shares at Dec. 31, 2017			84,948,126
Net Income (loss) | Accounting Standards Update 2014-09	(3,281)
Stockholders' Equity Balance at Jun. 30, 2018	357,086
Stockholders' Equity Balance at Dec. 31, 2017	328,397		$ 8		353,609	(25,220)
Stockholders' Equity Balance, shares at Dec. 31, 2017			84,948,126
Net Income (loss) | Accounting Standards Update 2014-09	(1,473)
Stockholders' Equity Balance at Sep. 30, 2018	364,156
Stockholders' Equity Balance at Dec. 31, 2017	328,397		$ 8		353,609	(25,220)
Stockholders' Equity Balance, shares at Dec. 31, 2017			84,948,126
Exercise of stock options	1,809				1,809
Exercise of stock options, shares			637,188
Stock-based compensation expense	18,975				18,975
Incentive units vested	78		$ 1		77
Incentive units vested, shares			1,502,726
Restricted stock units vested, net of tax settlement	(348)				(348)
Restricted stock units vested, net of tax settlement, shares			256,325
Common stock issued under employee stock plans, net	3,351				3,351
Common stock issued under employee stock plans, net, shares			167,810
Net Income (loss)	3,670					3,670
Net Income (loss) | Accounting Standards Update 2014-09	3,670
Stockholders' Equity Balance at Dec. 31, 2018	377,693		$ 9		377,473	211
Stockholders' Equity Balance, shares at Dec. 31, 2018			87,512,175
Stockholders' Equity Balance at Mar. 31, 2018	353,107
Net Income (loss) | Accounting Standards Update 2014-09	(979)
Stockholders' Equity Balance at Jun. 30, 2018	357,086
Net Income (loss) | Accounting Standards Update 2014-09	1,808
Stockholders' Equity Balance at Sep. 30, 2018	364,156
Net Income (loss) | Accounting Standards Update 2014-09	5,143
Stockholders' Equity Balance at Dec. 31, 2018	377,693		$ 9		$ 377,473	211
Stockholders' Equity Balance, shares at Dec. 31, 2018			87,512,175
Cumulative effect adjustment from the adoption of ASC 606 | Accounting Standards Update 2014-09	$ 21,761					$ 21,761

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities
Net Income (loss)	$ 3,670,000	$ (7,592,000)	$ (3,173,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization expense	10,736,000	10,220,000	9,982,000
Amortization of loan origination fees	238,000	746,000	749,000
Amortization of contract acquisition costs	7,753,000	3,008,000	1,281,000
Loss on modification and extinguishment of debt	1,848,000	1,702,000
(Gain) loss on disposal of fixed assets	(20,000)	(20,000)	5,000
Bad debt expense	2,332,000	0	0
Stock-based compensation expense	18,975,000	4,514,000	568,000
Deferred taxes	(1,280,000)	69,000	(2,537,000)
Changes in operating assets and liabilities:
Accounts receivable	(31,249,000)	(24,116,000)	(17,245,000)
Prepayments and other current assets	(13,742,000)	(5,182,000)	(4,060,000)
Other non-current assets	(3,599,000)	(2,453,000)	(857,000)
Accounts payable	2,406,000	1,443,000	(262,000)
Accrued expenses and other liabilities	(882,000)	10,882,000	1,712,000
Income taxes	455,000	614,000	161,000
Deferred revenue	39,899,000	28,021,000	20,216,000
Net cash provided by operating activities	37,540,000	21,856,000	6,540,000
Investing activities
Purchase of intangibles	(2,500,000)
Purchase of property and equipment	(8,389,000)	(2,711,000)	(1,263,000)
Proceeds from sale of property and equipment	33,000	190,000	8,000
Net cash used in investing activities	(10,856,000)	(2,521,000)	(1,255,000)
Financing activities
Repayments of line of credit			(10,000,000)
Proceeds from term loan		50,000,000	115,000,000
Repayments of term loan	(70,000,000)	(90,000,000)	(105,000,000)
Prepayment penalty and fees	(387,000)	(1,390,000)
Dividend payments		(50,387,000)
Debt issuance costs		(1,384,000)	(3,083,000)
Proceeds from issuance of equity	3,351,000	171,980,000	1,329,000
Repurchase of equity shares		(658,000)	(226,000)
Taxes associated with net issuances of shares upon vesting of restricted stock units	(348,000)
Exercise of stock options	1,809,000	359,000	18,000
Net cash (used in) provided by financing activities	(65,575,000)	78,520,000	(1,962,000)
Net (decrease) increase in cash, cash equivalents and restricted cash	(38,891,000)	97,855,000	3,323,000
Cash, cash equivalents and restricted cash, beginning of period	116,127,000	18,272,000	14,949,000
Cash, cash equivalents and restricted cash, end of period	77,236,000	116,127,000	18,272,000
Supplemental disclosure of cash flow information:
Cash paid for interest	2,780,000	13,250,000	5,848,000
Cash paid for income taxes	1,631,000	1,612,000	406,000
Tenant improvement allowance	9,787,000
Conversion of redeemable convertible preferred stock to common stock		173,429,000
Conversion of prepaid incentive units to common stock (Note 10)	$ 78,000	$ 78,000	89,000
Forgiveness of liability to controlling entity			$ 459,000

Organization and Description of

Organization and Description of Business	12 Months Ended
	Dec. 31, 2018
Organization And Description Of Business [Abstract]
Organization and Description of Business	1. Organization and Description of Business SailPoint Technologies Holdings, Inc., (“we”, “our” or “the Company”) was incorporated in the state of Delaware on August 8, 2014, in preparation for the purchase of SailPoint Technologies, Inc. The purchase occurred on September 8, 2014 and our certificate of incorporation was amended and restated as of such date. SailPoint Technologies, Inc. was formed July 14, 2004 as a Delaware corporation. The Company designs, develops, and markets identity governance software that helps organizations govern user access to critical systems and data. The Company currently markets its products and services throughout North America, Europe and the Asia Pacific regions.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements, which include the accounts of the Company and its wholly owned subsidiaries, have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The consolidated financial statements include the accounts of SailPoint Technologies Holdings, Inc. and its subsidiaries, SailPoint Technologies Intermediate Holdings, LLC, SailPoint Technologies, Inc., SailPoint Technologies UK LTD, SailPoint Holdings, Inc., SailPoint International, Inc., SailPoint Technologies India Private LTD, SailPoint Technologies Netherlands B.V., SailPoint Technologies Israel Ltd, SailPoint Technologies SARL, SailPoint Technologies GmbH, and SailPoint Technologies Pte. Ltd. and Whitebox Security Ltd. All intercompany accounts and transactions have been eliminated in consolidation. The Company operates as one operating segment. The Company’s chief operating decision makers, who review financial information presented on a consolidated basis for purposes of making operating decisions, assess financial performance and allocate resources. Accounting Principles We adopted the revised revenue recognition accounting standard, codified as Accounting Standards Codification (“ASC”) 606, effective January 1, 2018 on a modified retrospective basis (see Recently Adopted Accounting Pronouncements). Financial results for reporting periods during 2018 are presented in compliance with the revised revenue recognition standard. Historical financial results for reporting periods prior to 2018 are presented in conformity with amounts previously disclosed under the prior revenue recognition standard, ASC 605. These financial statements include additional information regarding the impacts from the adoption of the revised revenue recognition standard on our financial results for the year ended December 31, 2018. This includes the presentation of financial results for the year ended December 31, 2018 under ASC 605 for comparison to the prior year. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Management periodically evaluates such estimates and assumptions for continued reasonableness. In particular, we make estimates with respect to the fair value allocation of multiple performance obligation in revenue recognition, the uncollectible accounts receivable, valuation of long-lived assets, stock-based compensation expense and income taxes. Appropriate adjustments, if any, to the estimates used are made prospectively based upon such periodic evaluation. Actual results could differ from those estimates. Cash, Cash Equivalents and Restricted Cash We consider all highly liquid investments with an original maturity of three months or less from date of purchase to be cash equivalents. The Company is required to maintain a small amount of restricted cash to guarantee rent payments in a foreign subsidiary as well as $6.0 million of cash collateral for an unconditional standby letter of credit related to the Company’s corporate headquarters lease As of December 31, 2018 2017 (In thousands) Cash and cash equivalents per balance sheet $ 70,964 $ 116,049 Restricted cash per balance sheet 6,272 78 Cash, cash equivalents and restricted cash per cash flow $ 77,236 $ 116,127 Fair Value of Financial Instruments Assets and liabilities recorded at fair value in the financial statements are categorized based upon the level of judgment associated with the inputs used to measure their fair value. Hierarchical levels which are directly related to the amount of subjectivity associated with the inputs to the valuation of these assets or liabilities are as follows: • Level 1: Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2: Observable inputs, other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active 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 reflecting our own assumptions incorporated in valuation techniques used to determine fair value. These assumptions are required to be consistent with market participant assumptions that are reasonably available. The Company’s carrying amounts of financial instruments, including cash and cash equivalents, accounts receivable, accounts payable, and accrued expenses are considered Level 1 and approximate their fair values due to their short maturities as of December 31, 2018 and 2017. The carrying value of the Company’s line of credit and long-term debt approximate fair value and were valued using a Level 1 input, specifically the borrowing rates available to the Company at December 31, 2017. There was no line of credit or long-term debt at December 31, 2018. Concentration of Credit and Other Risks Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash and cash equivalents and accounts receivable. The Company maintains its cash in bank deposit accounts that, at times, may exceed federally insured limits. As of December 31, 2018, approximately 11% of the Company’s accounts receivable was from one customer. Management considers concentration of credit risk to be minimal with respect to accounts receivable due to the positive historical collection experience of the Company despite the geographic concentrations related to the Company’s customers. There was no concentration of credit risk for customers as of December 31, 2017 as no individual entity represented more than 10% of the balance in accounts receivable. No customer represented more than 10% of revenue in the years ended December 31, 2018, 2017 and 2016. The Company does not experience concentration of credit risk in foreign countries as no foreign country represents more than 10% of the Company’s consolidated revenues or net assets. The following tables sets forth the Company’s consolidated total revenue by geography: Year Ended December 31, 2018 2018 2017 (1) 2016 (1) with adoption (ASC 606) without adoption (ASC 605) as previously reported (ASC 605) (In thousands) United States $ 171,497 $ 169,927 $ 134,676 $ 92,116 EMEA (2) 49,871 49,854 33,097 25,668 Rest of the World (2) 27,552 28,694 18,283 14,628 Total revenue $ 248,920 $ 248,475 $ 186,056 $ 132,412 (1) The comparative information for years prior to 2018 has not been adjusted to reflect the adoption of the revised standard and is reported on an ASC 605 basis. For additional information see Note 3. (2) No single country represented more than 10% of consolidated revenue Accounts Receivable and Allowance for Doubtful Accounts The Company continuously assesses the collectability of outstanding customer invoices and in doing so, the Company assesses the need to maintain an allowance for estimated losses resulting from the non-collection of customer receivables. In estimating this allowance, the Company considers factors such as: historical collection experience, a customer’s current creditworthiness, customer concentrations, age of outstanding balances, both individually and in the aggregate, and existing economic conditions. Actual customer collections could differ from the Company’s estimates. The Company determined that an allowance for doubtful accounts was not required for the periods presented. The bad debt expense recognized for the year ended December 31, 2018 was $2.3 million. The bad debt expenses recognized for the years ended December 31, 2017 and 2016 were not material. Property and Equipment, Net Property and equipment, net, is stated at cost less accumulated depreciation. Depreciation is recorded using the straight-line method over the estimated useful lives of the respective assets, generally three to five years. Leasehold improvements are depreciated over the shorter of the useful lives of the assets or the related lease term. Repairs and maintenance costs are expensed as incurred. Property and equipment are reviewed for impairment whenever events or circumstances indicate their carrying value may not be recoverable. When such events or circumstances arise, an estimate of future undiscounted cash flows produced by the asset, or the appropriate grouping of assets, is compared to the asset’s carrying value to determine if an impairment exists. If the asset is determined to be impaired, the impairment loss is measured based on the excess of the carrying value over the assets fair value. Assets to be disposed of are reported at the lower of carrying value or net realizable value. There were no impairments of property and equipment during the years ended December 31, 2018, 2017 or 2016. Goodwill Goodwill represents the excess of acquisition cost over the fair value of net tangible and identified net assets acquired. Goodwill and intangible assets that have indefinite lives are not be amortized, but rather tested for impairment annually, as of October 31, or more often if and when events or circumstances indicate that the carrying value may not be recoverable. The annual impairment test is completed using either: a qualitative “Step 0” assessment based on reviewing relevant events and circumstances; or a quantitative “Step 1” assessment, which determines the fair value of the reporting unit, using an income approach that discounts future cash flows based on the estimated future results of our reporting units and a market approach that compares market multiples of comparable companies to determine whether or not any impairment exists. The Step 1 of the goodwill impairment test, used to identify potential impairment, compares the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit exceeds its carrying amount, goodwill of the reporting unit is considered not impaired, thus the second step of the impairment test is unnecessary. If the carrying amount of a reporting unit exceeds its fair value, the second step of the goodwill impairment test shall be performed to measure the amount of impairment loss, if any in an amount equal to the excess. The loss recognized cannot exceed the carrying amount of goodwill. After a goodwill impairment loss is recognized, the adjusted carrying amount of goodwill shall be its new accounting basis. The annual evaluation of goodwill requires the use of estimates about future operating results to determine its estimated fair value. Changes in forecasted operations can materially affect these estimates, which could materially affect our results of operations. The estimate of fair value requires significant judgment and we base our fair value estimates on assumptions that we believe to be reasonable; but that are unpredictable and inherently uncertain, including: estimates of future growth rates, operating margins and assumptions about the overall economic climate as well as the competitive environment. There can be no assurance that our estimates and assumptions made for purposes of our goodwill testing as of the time of testing will prove to be accurate predictions of the future. If our assumptions regarding business plans, competitive environments or anticipated growth rates are not correct, we may be required to record goodwill impairment charges in future periods, whether in connection with our next annual impairment testing, or earlier, if an indicator of an impairment is present prior to our next annual evaluation. Goodwill is tested on an annual basis during the fourth quarter, or sooner if an indicator of impairment occurs. The company internally monitors business and market conditions for evidence of triggering events. There were no triggering events for any of the asset types during 2018, 2017 or 2016 or any material changes in business trend indicating the need for impairment loss. As of October 31, 2018, the Company performed a qualitative “Step 0” assessment and concluded no impairment for goodwill, was required. Hence, the first and second steps were not required to be performed for 2018. There were no impairments of goodwill during the years ended December 31, 2018, 2017 or 2016. Intangible Assets Intangible assets are amortized on a straight-line basis over their estimated useful lives. The Company periodically reviews the estimated remaining useful life of our intangible assets and whether events or changes in circumstances warrant a revision to the remaining period of amortization. Periodically, the Company evaluates the recoverability of its long-lived assets including intangible assets, for possible impairment whenever events or circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of these assets is measured by comparison of the carrying amount of each asset, or related asset group, to the future undiscounted cash flows the asset is expected to generate. If the undiscounted cash flows used in the test for recoverability are less than the carrying amount of these assets, the carrying amount of such assets is reduced to fair value. The Company did not record any impairments of long-lived assets including intangible assets for the years ended December 31, 2018, 2017 or 2016. Software Development Costs Software development costs for products intended to be sold, leased or otherwise marketed are expensed as incurred until technological feasibility has been established, at which time such costs are capitalized until the product is available for general release to customers. Technological feasibility is established when a product design and working model have been completed and the completeness of the working model and its consistency with the product design have been confirmed by testing. To date, the establishment of technological feasibility of the Company’s products and general release of such software have substantially coincided. As a result, software development costs qualifying for capitalization have been insignificant. We have not capitalized any software development costs through December 31, 2018, all such costs have been recorded as research and development expenses, as incurred, in the consolidated statements of operations. Comprehensive Income (Loss) The Company has not entered into transactions that require presentation as other comprehensive income (loss). Total comprehensive income (loss) is equal to net income (loss) for all periods presented. Liquidity Our principal sources of liquidity have been the net proceeds we received through the sale of our common stock in our initial public offering, other equity financing, and cash generated from our operations. The Company had cash and cash equivalents of approximately $71.0 million at December 31, 2018, which we intend to use for working capital, operating expenses, and capital expenditures. We believe that our existing cash and cash equivalents, net operating cash flows, and revenues will be sufficient to satisfy our anticipated cash needs for working capital and capital expenditures for at least the next 12 months. Our future capital requirements and the adequacy of available funds will depend on many factors, including those set forth in Item 1A, Part I of this Annual Report on Form 10-K titled “Risk Factors.” Revenue Recognition ASC 606 Revenue consists of fees for perpetual and term licenses for the Company’s software products, post-contract customer support (referred to as maintenance), software as a service (“SaaS”) and professional services including training and other revenue. We typically recognize license revenue upon delivering the applicable license. The following describes the nature of the Company’s primary types of revenues and the revenue recognition policies as they pertain to the types of transactions the Company enters into with its customers. License Revenue License revenue includes perpetual license fees and term license fees which provide customers with the same functionality and differ mainly in the duration over which the customer benefits from the use of software. Both revenues from perpetual license and term license performance obligations are generally recognized upfront at the point in time when the software license has been delivered. All license transactions generally include an amount for first-year maintenance at no additional charge, which we recognize as subscription revenue over the term. Subscription Revenues Our subscription revenue consists of (i) fees for ongoing maintenance and support of our licensed solutions and (ii) subscription fees for access to, and related support for, our cloud-based solution. We typically invoice subscription fees in advance in annual installments and recognize subscription revenue ratably over the term of the applicable agreement. Subscription revenue include arrangements for software maintenance and technical support for our products and subscription services. Maintenance contracts generally have a term of one year and subscription revenue contracts usually have a term of one to three years which is initially deferred and recognized ratably over the life of the contract. Maintenance services agreements consist of fees for providing software updates on a when and if available basis and for providing technical support for software products for a specified term. We believe that our if available software updates and technical support each have the same pattern of transfer to the customer and are substantially the same. Therefore, we consider these to be a single distinct performance obligation. Therefore, revenue allocated to maintenance services are recognized ratably over the contract term beginning on the delivery date of each offering. Expenses related to maintenance and subscription are recognized as incurred. Unearned maintenance and subscription revenue are included in deferred revenue. The Company’s subscription services arrangements are generally non-cancelable and do not contain refund-type provisions. In instances that subscription services arrangements are deemed cancellable, which is rare, the Company will adjust the transaction price and period for revenue recognition accordingly to be reflective of the contract term in accordance with Accounting Standards Codification (“ASC”) 606, Revenue from Contracts with Customers (ASC 606) . Services and Other Revenues Services and other revenue consist primarily of fees from professional services provided to our customers and partners to configure and optimize the use of our solutions as well as training services related to the configuration and operation of our platform. The Company’s professional services contracts are either on a time and materials or “consumption based”, fixed fee or prepaid. Services revenues are generally recognized over time as the services are performed. Revenues for fixed price services and prepaids are generally recognized over time applying input methods to estimate progress to completion. Revenues for consumption-based services are generally recognized as the services are performed. Training revenues are recognized as the services are performed over time. Deferred Contract Acquisition Costs Under ASC 606, sales commissions paid to our sales force and the related employer payroll taxes, collectively “ deferred contract acquisition costs Contract Balances Deferred revenue We typically invoice our customers for subscription, maintenance and support fees in advance on either an annual, two- or three-year basis, with payment due at the start of the subscription term. For subscription fees, which includes subscription and maintenance, the timing of payments is typically upfront. Therefore, a contract liability or deferred revenue, is created because payment is made in advance of performance and these performance obligations are satisfied over time. Timing may differ between the satisfaction of performance obligations and the invoicing and collection of amounts related to our contracts with customers. Liabilities are recorded for amounts that are collected in advance of the satisfaction of performance obligations. Invoice amounts for non-cancelable services starting in future periods are included in contract assets and deferred revenue. The portion of deferred revenue that we anticipate will be recognized within twelve months is recorded as current deferred revenue, and the remaining portion is recorded as non-current deferred revenue in the consolidated balance sheets. Contract assets Contract assets relate to the Company’s rights to consideration for performance obligations satisfied but not billed at the reporting date on contracts. Contract assets are transferred to accounts receivable when the rights become unconditional. Contract assets are included in prepayments and other current assets and other non-current assets in the consolidated balance sheets. Revenue Recognition ASC 605 Our revenue recognition accounting policy for ASC 605 is shown below. We applied the revenue recognition accounting policy for ASC 605 to our disclosures in Note 3, which include amounts presented for 2018. Revenue consists of fees for perpetual licenses for the Company’s software products, post-contract customer support (referred to as maintenance), professional services, software as a service (“SaaS”) and other revenue. The Company recognizes revenue in accordance with the provisions of the Financial Accounting Standards Board (“FASB”) authoritative guidance on software revenue recognition and multiple element arrangements. Revenue is recognized when: • Persuasive evidence of an arrangement exists • Delivery has occurred, or services have been rendered • The Company’s price to the buyer is fixed or determinable, and • Collectability is probable The Company frequently enters into sales arrangements that contain multiple elements or deliverables. For arrangements that include both software and non-software elements, the Company allocates revenue to the software deliverables as a group and separable non-software deliverables as a group based on their relative selling prices. In such circumstances, the accounting principles establish a hierarchy to determine the selling price used for allocating revenue to the deliverables as follows: (i) Vendor Specific Objective Evidence (“VSOE”), (ii) third-party evidence of selling price (“TPE”) and (iii) the best estimate of the selling price (“ESP”). Cloud-based services, and professional services related to cloud-based services, are considered to be non-software elements in the Company’s arrangements. VSOE of fair value for each element is based on the Company’s standard rates charged for the product or service when such product or service is sold separately or based upon the price established by the Company’s pricing committee when that product or service is not yet being sold separately. The Company establishes VSOE for maintenance and professional services using a “bell-shaped curve” approach. When applying the “bell-shaped curve” approach the Company analyzes all maintenance renewal transactions over the past twelve months for that category of license and plots those data points on a bell-shaped curve to ensure that a high percentage of the data points are within an acceptable margin of the established VSOE rate. This analysis is performed quarterly on a rolling 12-month basis. When the Company is unable to establish a selling price for non-software arrangements using VSOE or TPE, the Company uses ESP in the allocation of arrangement consideration. The objective of ESP is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. The determination of ESP is made through consultation with and formal approval by the Company’s management, taking into consideration the Company’s go-to-market strategy, pricing factors, and historical transactions. The Company recognizes revenue for software arrangements that include undelivered elements using the residual method. Under the residual method, the fair value of the undelivered elements is deferred and recognized as such elements are delivered to the customer and the remaining portion of the agreement fee is recognized as license revenue upon delivery. The determination of fair value of each undelivered element in software arrangements is based on VSOE. If VSOE has not been established for certain undelivered elements in an agreement, revenue is deferred until those elements have been delivered or their VSOE has been determined. Revenue from maintenance and SaaS services is recognized ratably over the relevant contract period. Service revenue includes consulting and training. The Company has determined that consulting and training services are not essential to the functionality of the Company’s software and SaaS offerings, and consulting and training services are typically listed separately in arrangements, are optional, and sold separately. As a result, the Company has established VSOE or ESP for consulting and training services and they therefore qualify for separate accounting. In order to account for deliverables in a multiple-deliverable arrangement as separate unit of accounting, delivered elements must have standalone value. In determining whether professional services have standalone value, we consider the following factors for each professional services agreement: availability of the services from other vendors, the nature of the professional services, the timing of when the professional services contract was signed in comparison to the software or SaaS arrangement and the contractual dependence of the arrangement on the customer’s satisfaction with the professional services. Professional services sold as part of arrangements generally qualify for separate accounting. Consulting and training service revenue that qualifies for separate accounting is recognized as the services are performed using the proportional performance method for fixed fee consulting contracts, or when the right to the service expires. The majority of the Company’s consulting contracts are billed on a time and materials basis. Cost of Revenue Cost of revenue for licenses consists of amortization expense for developed technology acquired in business combinations and third-party royalties. Cost of subscription revenue consists primarily of employee costs of our customer support organization (including salaries, benefits, bonuses and stock-based compensation), contractor costs to supplement our staff levels, third-party cloud-hosting costs, allocated overhead and amortization expense for developed technology acquired in business combinations. Cost of revenue for services and other revenue consists primarily of personnel-related costs of our services and training departments, including salaries, commissions, benefits, bonuses and stock-based compensation, contractor costs to supplement our staff levels and allocated overhead. Research and Development Expenses Research and development costs are expensed as incurred. Research and development expenses consist primarily of personnel-related costs for the design and development of our platform and technologies, contractor costs to supplement our staff levels, third-party web services, consulting services, and allocated overhead. Advertising Expenses The Company expenses advertising costs as incurred. Advertising expenses were approximately $7.3 million, $6.0 million and $4.2 million for the years ended December 31, 2018, 2017 and 2016, respectively, and are included in sales and marketing expense. Stock-Based Compensation The Company measures stock-based compensation expense for equity instruments granted to employees based upon the estimated fair value of the award at the date of grant and the estimated number of shares ultimately expected to vest. The Company estimates the fair value of stock options granted using the Black-Scholes option-pricing model, which requires us to estimate the expected term, fair value of common stock, expected volatility, expected forfeitures, risk-free interest rate, and dividend yield. We use the simplified method in developing an estimate of the expected term of the stock options, which is calculated as the average of the time to vesting and the contractual life of the options. The expected volatility is based upon the average historical volatility of comparable companies over a period approximately equal to the expected term of the awards. The risk-free interest rate is based on the average interest rate for U.S. Treasury instruments whose term is consistent with the expected term of the options. Stock-based compensation expense resulting from this valuation is recognized in the consolidated statements of operations on a straight-line basis over the period during which an employee provides the requisite service in exchange for the award. The Company analyzes the facts and circumstances of each equity instrument to determine if modification accounting is required. This analysis includes a review of factors that influence the probability of vesting. If circumstances arise that have changed the probability that an equity instrument will vest, or other factors have triggered a modification, the revised fair value is calculated, and additional stock-based compensation is recognized over the remaining service period of the modified instrument. The Company estimates potential forfeitures of stock grants and adjust recorded stock-based compensation expense accordingly. The estimate of forfeitures is based on historical experience and is adjusted over the requisite service period to the extent that actual forfeitures differ, or are expected to differ, from the prior estimates. Changes in estimated forfeitures will be recognized in the period of change and will impact the amount of stock-based compensation expense to be recognized in future periods. To date, the company has experienced minimal forfeitures. The Company also offers an Employee Stock Purchase Plan (ESPP) that allows permitted employees to purchase shares by authorizing payroll deductions from 1% to 15% of employee’s eligible compensation during the semi-annual offering period, with an annual cap of $25,000. Unless an employee has previously withdrawn from the offering, the payroll deductions will be used to purchase shares of common stock after the closing of the offering period at a price equal to 85% of the fair market value of the closing price of the shares at the opening or closing of the semi-annual offering period, whichever is lower. ESPP purchase rights have an expected volatility that is based on the historical volatility of the common stock of a collection of our peers in the market. The expected term represents the period of time the ESPP purchase rights are expected to be outstanding and approximates the offering period. Foreign Currency Translation The functional currency of our non-U.S. subsidiaries is the U.S. Dollar; therefore, all gains and losses on currency transactions are expensed as incurred. Income Taxes The Company uses the liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for expected future tax consequences of temporary differences between the carrying amounts and the tax bases of assets and liabilities. Valuation allowances are provided if it is more likely than not that some or all of the deferred tax assets will not be realized. The Company accounts for uncertainty of income taxes based on a “more-likely-than-not” threshold for the recognition and de-recognition of tax positions, which includes the accounting for interest and penalties relating to tax positions. Net Income (Loss) Per Share Basic net income (loss) per share attributable to common stockholders is calculated by dividing the net income (loss) attributable to common stockholders for the period, defined as net income (loss) minus the accretion of dividends on redeemable convertible preferred stock, by the weighted-average number of shares of common stock outstanding during the period, without consideration of potentially dilutive securities. Diluted earnings per share includes the dilutive effect of common stock equivalents and is calculated using the weighted-average number of common stock and th

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2018
Revenue Recognition [Abstract]
Revenue Recognition	3. Revenue Recognition ASC 606 Adoption and Impact to Previously Reported Results The Company adopted the revised standard as of January 1, 2018, utilizing the modified retrospective transition method Effective July 1, 2018, the Company lost its EGC status which accelerated the requirement of ASC 606 adoption. As a result, the Company adjusted its previously reported interim financial statements effective January 1, 2018. As of January 1, 2018, the adoption of the revised standard resulted in the following: • An increase in deferred customer acquisition cost of $16.2 million, of which $3.2 million is reported in prepayments and other current assets and $13.0 million is reported in other non-current assets • Recorded a contract asset of $2.8 million, of which $2.6 million is reported in prepayments and other current assets and $0.2 million is reclassed to other non-current assets • A decrease in accounts receivable of $0.4 million • A decrease in short-term deferred revenues of $9.5 million • An increase in long-term deferred revenues of $0.8 million • A net increase of $5.7 million in deferred tax liabilities, • A decrease of $21.8 million in accumulated deficit These adjustments are as a result of the capitalization of customer acquisition costs, primarily deferred contract acquisition costs December 31, 2017 January 1, 2018 As reported (ASC 605) Impact of adoption As adjusted (ASC 606) Assets Current assets Cash and cash equivalents $ 116,049 $ — $ 116,049 Restricted cash 78 — 78 Accounts receivable 72,907 (355 ) 72,552 Prepayments and other current assets 10,013 5,848 15,861 Total current assets 199,047 5,493 204,540 Property and equipment, net 3,018 — 3,018 Deferred tax asset - non-current 264 (264 ) — Other non-current assets 3,542 13,232 16,774 Goodwill 219,377 — 219,377 Intangible assets, net 81,185 — 81,185 Total assets $ 506,433 $ 18,461 $ 524,894 Liabilities and stockholders’ equity Current liabilities Accounts payable $ 2,231 $ — $ 2,231 Accrued expenses and other liabilities 22,636 — 22,636 Income taxes payable 1,688 — 1,688 Deferred revenue - current 73,671 (9,508 ) 64,163 Total current liabilities 100,226 (9,508 ) 90,718 Deferred tax liability - non-current — 5,422 5,422 Long-term debt 68,329 — 68,329 Other long-term liabilities 27 — 27 Deferred revenue - non-current 9,454 786 10,240 Total liabilities 178,036 (3,300 ) 174,736 Commitments and contingencies Stockholders’ equity Common stock, $0.0001 par value 8 — 8 Preferred stock, $0.0001 par value, — — — Additional paid in capital 353,609 — 353,609 Accumulated deficit (25,220 ) 21,761 (3,459 ) Total stockholders' equity 328,397 21,761 350,158 Total liabilities and stockholders’ equity $ 506,433 $ 18,461 $ 524,894 Unaudited consolidated statement of financial position which reflect the adoption of ASC 606 are as follows by quarter (in thousands): March 31, 2018 June 30, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Assets Current assets Cash and cash equivalents $ 130,859 $ — $ 130,859 $ 81,809 $ — $ 81,809 Restricted cash 126 — 126 120 — 120 Accounts receivable 55,997 (697 ) 55,300 55,196 (689 ) 54,507 Prepayments and other current assets 9,094 7,369 16,463 9,784 7,545 17,329 Income taxes receivable — 1,164 1,164 — 5,841 5,841 Total current assets 196,076 7,836 203,912 146,909 12,697 159,606 Property and equipment, net 3,126 — 3,126 3,595 — 3,595 Deferred tax asset - non-current 264 (264 ) — 264 (264 ) — Other non-current assets 3,106 13,090 16,196 3,328 14,101 17,429 Goodwill 219,377 — 219,377 219,377 — 219,377 Intangible assets, net 78,979 — 78,979 76,773 — 76,773 Total assets 500,928 20,662 521,590 450,246 26,534 476,780 Liabilities and stockholders’ equity Current liabilities Accounts payable 1,872 — 1,872 2,894 — 2,894 Accrued expenses and other liabilities 12,012 (867 ) 11,145 14,106 (1,467 ) 12,639 Income taxes payable 1,918 (1,918 ) — 1,423 (1,423 ) — Deferred revenue - current 75,883 (7,144 ) 68,739 81,322 (6,079 ) 75,243 Total current liabilities 91,685 (9,929 ) 81,756 99,745 (8,969 ) 90,776 Deferred tax liability - non-current — 5,422 5,422 — 5,422 5,422 Long-term debt 68,321 — 68,321 9,640 — 9,640 Other long-term liabilities 65 — 65 51 — 51 Deferred revenue - non-current 13,175 (256 ) 12,919 13,817 (12 ) 13,805 Total liabilities 173,246 (4,763 ) 168,483 123,253 (3,559 ) 119,694 Commitments and contingencies Stockholders’ equity Common stock, $0.0001 par value 9 — 9 9 — 9 Preferred stock, $0.0001 par value — — — — — — Additional paid in capital 358,858 — 358,858 363,818 — 363,818 Accumulated deficit (31,185 ) 25,425 (5,760 ) (36,834 ) 30,093 (6,741 ) Total stockholders' equity 327,682 25,425 353,107 326,993 30,093 357,086 Total liabilities and stockholders’ equity $ 500,928 $ 20,662 $ 521,590 $ 450,246 $ 26,534 $ 476,780 September 30, 2018 December 31, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Presented without adoption (ASC 605) Impact of adoption As adjusted with adoption (ASC 606) Assets Current assets Cash and cash equivalents $ 83,315 $ — $ 83,315 $ 70,964 $ — $ 70,964 Restricted cash 121 — 121 6,272 — 6,272 Accounts receivable 71,316 (551 ) 70,765 102,188 (719 ) 101,469 Prepayments and other current assets 11,743 6,702 18,445 10,982 10,868 21,850 Income taxes receivable — 3,399 3,399 — — — Total current assets 166,495 9,550 176,045 190,406 10,149 200,555 Property and equipment, net 10,103 — 10,103 19,268 — 19,268 Deferred tax asset - non-current 264 (264 ) — 736 (736 ) — Other non-current assets 3,236 15,107 18,343 7,853 12,521 20,374 Goodwill 219,377 — 219,377 219,377 — 219,377 Intangible assets, net 74,567 — 74,567 74,860 — 74,860 Total assets 474,042 24,393 498,435 512,500 21,934 534,434 Liabilities and stockholders’ equity Current liabilities Accounts payable 3,036 — 3,036 4,636 — 4,636 Accrued expenses and other liabilities 18,623 (1,076 ) 17,547 21,886 (155 ) 21,731 Income taxes payable 2,099 (2,099 ) — 2,037 106 2,143 Deferred revenue - current 86,679 (6,432 ) 80,247 102,996 (7,077 ) 95,919 Current portion of long-term debt 9,669 — 9,669 — — — Total current liabilities 120,106 (9,607 ) 110,499 131,555 (7,126 ) 124,429 Deferred tax liability - non-current — 5,422 5,422 — 4,142 4,142 Long-term debt — — — — — — Other long-term liabilities 4,404 — 4,404 9,824 (36 ) 9,788 Deferred revenue - non-current 13,976 (22 ) 13,954 21,191 (2,809 ) 18,382 Total liabilities 138,486 (4,207 ) 134,279 162,570 (5,829 ) 156,741 Commitments and contingencies Stockholders’ equity Common stock, $0.0001 par value 9 — 9 9 — 9 Preferred stock, $0.0001 par value — — — — — — Additional paid in capital 369,079 — 369,079 377,473 — 377,473 (Accumulated deficit) retained earnings (33,532 ) 28,600 (4,932 ) (27,552 ) 27,763 211 Total stockholders' equity 335,556 28,600 364,156 349,930 27,763 377,693 Total liabilities and stockholders’ equity $ 474,042 $ 24,393 $ 498,435 $ 512,500 $ 21,934 $ 534,434 Select unaudited consolidated statement of operations which reflect the adoption of ASC 606 are as follows (in thousands, except share and per share data): Three Month Ended March 31, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Revenue Licenses $ 16,987 $ (179 ) $ 16,808 Subscription 23,005 (500 ) 22,505 Services and other 9,722 (94 ) 9,628 Total revenue 49,714 (773 ) 48,941 Cost of revenue Licenses 1,138 — 1,138 Subscription 4,658 — 4,658 Services and other 6,974 — 6,974 Total cost of revenue 12,770 — 12,770 Gross profit 36,944 (773 ) 36,171 Operating expenses Research and development 9,762 — 9,762 General and administrative 7,657 — 7,657 Sales and marketing 23,815 (1,356 ) 22,459 Total operating expenses 41,234 (1,356 ) 39,878 Loss from operations (4,290 ) 583 (3,707 ) Other expense, net: Interest expense, net (1,178 ) — (1,178 ) Other, net (147 ) — (147 ) Total other expense, net (1,325 ) — (1,325 ) Loss before income taxes (5,615 ) 583 (5,032 ) Income tax (352 ) 3,082 2,730 Net loss $ (5,967 ) $ 3,665 $ (2,302 ) Net loss per share Basic $ (0.07 ) $ 0.04 $ (0.03 ) Diluted $ (0.07 ) $ 0.04 $ (0.03 ) Weighted average shares outstanding Basic 85,719,240 — 85,719,240 Diluted 85,719,240 — 85,719,240 Three Months Ended Six Months Ended June 30, 2018 June 30, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Revenue Licenses $ 19,128 $ 492 $ 19,620 $ 36,115 $ 313 $ 36,428 Subscription 25,051 (941 ) 24,110 48,056 (1,441 ) 46,615 Services and other 10,381 (455 ) 9,926 20,103 (549 ) 19,554 Total revenue 54,560 (904 ) 53,656 104,274 (1,677 ) 102,597 Cost of revenue Licenses 1,260 — 1,260 2,398 — 2,398 Subscription 4,919 — 4,919 9,577 — 9,577 Services and other 7,197 — 7,197 14,171 — 14,171 Total cost of revenue 13,376 — 13,376 26,146 — 26,146 Gross profit 41,184 (904 ) 40,280 78,128 (1,677 ) 76,451 Operating expenses Research and development 10,115 — 10,115 19,877 — 19,877 General and administrative 7,743 — 7,743 15,400 — 15,400 Sales and marketing 25,163 (1,389 ) 23,774 48,978 (2,745 ) 46,233 Total operating expenses 43,021 (1,389 ) 41,632 84,255 (2,745 ) 81,510 Loss from operations (1,837 ) 485 (1,352 ) (6,127 ) 1,068 (5,059 ) Other expense, net: Interest expense, net (2,800 ) — (2,800 ) (3,978 ) — (3,978 ) Other, net (569 ) — (569 ) (716 ) — (716 ) Total other expense, net (3,369 ) — (3,369 ) (4,694 ) — (4,694 ) Loss before income taxes (5,206 ) 485 (4,721 ) (10,821 ) 1,068 (9,753 ) Income tax (expense) benefit (441 ) 4,183 3,742 (793 ) 7,265 6,472 Net loss $ (5,647 ) $ 4,668 $ (979 ) $ (11,614 ) $ 8,333 $ (3,281 ) Net loss per share Basic $ (0.07 ) $ 0.06 $ (0.01 ) $ (0.14 ) $ 0.10 $ (0.04 ) Diluted $ (0.07 ) $ 0.06 $ (0.01 ) $ (0.14 ) $ 0.10 $ (0.04 ) Weighted average shares outstanding Basic 86,246,056 — 86,246,056 85,984,103 — 85,984,103 Diluted 86,246,056 — 86,246,056 85,984,103 — 85,984,103 Three Months Ended Nine Months Ended September 30, 2018 September 30, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Revenue Licenses $ 28,131 $ (108 ) $ 28,023 $ 64,246 $ 205 $ 64,451 Subscription 28,461 (545 ) 27,916 76,517 (1,986 ) 74,531 Services and other 9,827 (31 ) 9,796 29,930 (580 ) 29,350 Total revenue 66,419 (684 ) 65,735 170,693 (2,361 ) 168,332 Cost of revenue Licenses 1,145 — 1,145 3,543 — 3,543 Subscription 5,252 — 5,252 14,829 — 14,829 Services and other 7,617 — 7,617 21,788 — 21,788 Total cost of revenue 14,014 — 14,014 40,160 — 40,160 Gross profit 52,405 (684 ) 51,721 130,533 (2,361 ) 128,172 Operating expenses Research and development 11,474 — 11,474 31,351 — 31,351 General and administrative 8,763 — 8,763 24,163 — 24,163 Sales and marketing 27,658 (957 ) 26,701 76,636 (3,702 ) 72,934 Total operating expenses 47,895 (957 ) 46,938 132,150 (3,702 ) 128,448 Income (loss) from operations 4,510 273 4,783 (1,617 ) 1,341 (276 ) Other expense, net: Interest expense, net (202 ) — (202 ) (4,180 ) — (4,180 ) Other, net (388 ) — (388 ) (1,104 ) — (1,104 ) Total other expense, net (590 ) — (590 ) (5,284 ) — (5,284 ) Income (loss) before income taxes 3,920 273 4,193 (6,901 ) 1,341 (5,560 ) Income tax (expense) benefit (618 ) (1,767 ) (2,385 ) (1,411 ) 5,498 4,087 Net income (loss) $ 3,302 $ (1,494 ) $ 1,808 $ (8,312 ) $ 6,839 $ (1,473 ) Net income (loss) per share Basic $ 0.04 $ (0.02 ) $ 0.02 $ (0.10 ) $ 0.08 $ (0.02 ) Diluted $ 0.04 $ (0.02 ) $ 0.02 $ (0.10 ) $ 0.08 $ (0.02 ) Weighted average shares outstanding Basic 86,825,168 — 86,825,168 86,267,539 — 86,267,539 Diluted 90,355,212 — 90,355,212 86,267,539 — 86,267,539 Three Months Ended Year Ended December 31, 2018 December 31, 2018 Presented without adoption (ASC 605) Impact of adoption As adjusted with adoption (ASC 606) Presented without adoption (ASC 605) Impact of adoption As adjusted with adoption (ASC 606) Revenue Licenses $ 37,447 $ 3,102 $ 40,549 $ 101,693 $ 3,307 $ 105,000 Subscription 30,015 (513 ) 29,502 106,532 (2,499 ) 104,033 Services and other 10,320 217 10,537 40,250 (363 ) 39,887 Total revenue 77,782 2,806 80,588 248,475 445 248,920 Cost of revenue Licenses 1,091 — 1,091 4,634 — 4,634 Subscription 5,905 — 5,905 20,734 — 20,734 Services and other 7,514 — 7,514 29,302 — 29,302 Total cost of revenue 14,510 — 14,510 54,670 — 54,670 Gross profit 63,272 2,806 66,078 193,805 445 194,250 Operating expenses Research and development 11,803 — 11,803 43,154 — 43,154 General and administrative 10,618 — 10,618 34,781 — 34,781 Sales and marketing 33,623 (1,155 ) 32,468 110,259 (4,857 ) 105,402 Total operating expenses 56,044 (1,155 ) 54,889 188,194 (4,857 ) 183,337 Income from operations 7,228 3,961 11,189 5,611 5,302 10,913 Other expense, net: Interest expense, net (527 ) — (527 ) (4,707 ) — (4,707 ) Other, net (342 ) — (342 ) (1,446 ) — (1,446 ) Total other expense, net (869 ) — (869 ) (6,153 ) — (6,153 ) Income before income taxes 6,359 3,961 10,320 (542 ) 5,302 4,760 Income tax expense (benefit) (380 ) (4,797 ) (5,177 ) (1,791 ) 701 (1,090 ) Net income (loss) $ 5,979 $ (836 ) $ 5,143 $ (2,333 ) $ 6,003 $ 3,670 Net income per share Basic $ 0.07 $ (0.01 ) $ 0.06 $ (0.03 ) $ 0.07 $ 0.04 Diluted $ 0.07 $ (0.01 ) $ 0.06 $ (0.03 ) $ 0.07 $ 0.04 Weighted average shares outstanding Basic 87,171,161 — 87,171,161 86,495,301 — 86,495,301 Diluted 90,234,993 — 90,234,993 86,495,301 3,507,451 90,002,752 Adoption of the revised standard related to revenue recognition had no impact to financing or investing cash flows on the Company’s consolidated statements of cash flows. Selected unaudited consolidated statement of cash flows line items which reflect the adoption of ASC 606 are as follows (in thousands): Three Months Ended March 31, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Operating activities Net loss $ (5,967 ) $ 3,665 $ (2,302 ) Adjustments to reconcile net loss to net cash provided by operating activities: Depreciation and amortization expense 2,628 — 2,628 Amortization of loan origination fees 108 — 108 Amortization of contract acquisition costs 1,139 536 1,675 Gain on disposal of fixed assets (4 ) — (4 ) Stock-based compensation expense 5,139 — 5,139 Changes in operating assets and liabilities: Accounts receivable 16,910 342 17,252 Prepayments and other current assets (220 ) (2,057 ) (2,277 ) Other non-current assets 436 142 578 Accounts payable (358 ) — (358 ) Accrued expenses and other liabilities (10,651 ) (868 ) (11,519 ) Income taxes 230 (3,082 ) (2,852 ) Deferred revenue 5,932 1,322 7,254 Net cash provided by operating activities $ 15,322 $ — $ 15,322 Six Months Ended June 30, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Operating activities Net loss $ (11,614 ) $ 8,333 $ (3,281 ) Adjustments to reconcile net loss to net cash provided by operating activities: Depreciation and amortization expense 5,278 — 5,278 Amortization of loan origination fees 191 — 191 Amortization of contract acquisition costs 2,007 1,394 3,401 Loss on modification and partial extinguishment of debt 1,536 — 1,536 Gain on disposal of fixed assets (48 ) — (48 ) Stock-based compensation expense 9,255 — 9,255 Changes in operating assets and liabilities: Accounts receivable 17,711 333 18,044 Prepayments and other current assets (1,778 ) (3,091 ) (4,869 ) Other non-current assets 214 (869 ) (655 ) Accounts payable 663 — 663 Accrued expenses and other liabilities (8,557 ) (1,467 ) (10,024 ) Income taxes (264 ) (7,265 ) (7,529 ) Deferred revenue 12,013 2,632 14,645 Net cash provided by operating activities $ 26,607 $ — $ 26,607 Nine Months Ended September 30, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Operating activities Net loss $ (8,312 ) $ 6,839 $ (1,473 ) Adjustments to reconcile net loss to net cash provided by operating activities: Depreciation and amortization expense 7,977 — 7,977 Amortization of loan origination fees 220 — 220 Amortization of contract acquisition costs 3,001 2,555 5,556 Loss on modification and partial extinguishment of debt 1,536 — 1,536 Gain on disposal of fixed assets (36 ) — (36 ) Bad debt 299 — 299 Stock-based compensation expense 14,138 — 14,138 Changes in operating assets and liabilities: Accounts receivable 1,292 195 1,487 Prepayments and other current assets (4,731 ) (3,409 ) (8,140 ) Other non-current assets 306 (1,873 ) (1,567 ) Accounts payable 805 — 805 Accrued expenses and other liabilities (4,078 ) (1,077 ) (5,155 ) Income taxes 411 (5,498 ) (5,087 ) Deferred revenue 17,530 2,268 19,798 Net cash provided by operating activities $ 30,358 $ — $ 30,358 Year Ended December 31, 2018 Presented without adoption (ASC 605) Impact of adoption As adjusted with adoption (ASC 606) Operating activities Net income $ (2,333 ) $ 6,003 $ 3,670 Adjustments to reconcile net loss to net cash provided by operating activities: Depreciation and amortization expense 10,736 — 10,736 Amortization of loan origination fees 238 — 238 Amortization of contract acquisition costs 3,889 3,864 7,753 Loss on modification and extinguishment of debt 1,848 — 1,848 (Gain) loss on disposal of fixed assets (20 ) — (20 ) Bad debt expense 2,332 — 2,332 Stock-based compensation expense 18,975 — 18,975 Deferred taxes (471 ) (809 ) (1,280 ) Changes in operating assets and liabilities: Accounts receivable (31,613 ) 364 (31,249 ) Prepayments and other current assets (4,858 ) (8,884 ) (13,742 ) Other non-current assets (4,310 ) 711 (3,599 ) Accounts payable 2,406 — 2,406 Accrued expenses and other liabilities (690 ) (192 ) (882 ) Income taxes 349 106 455 Deferred revenue 41,062 (1,163 ) 39,899 Net cash provided by operating activities 37,540 — 37,540 Disaggregation of revenue The Company’s revenue by geographic region based on the customer’s location is presented in Footnote 14. The following table presents the Company’s revenue by timing of revenue recognition to understand the risks of timing of transfer of control and cash flows: Year Ended December 31, 2018 License Subscription Services and other (in thousands) Timing of revenue recognition Revenue recognized at a point in time $ 105,000 $ — $ — Revenue recognized over time — 104,033 39,887 Total revenue $ 105,000 $ 104,033 $ 39,887 Contract Balances A summary of the activity impacting our contract balances during year ended December 31, 2018 is presented below (in thousands): Contract acquisition costs Balances at December 31, 2017 $ 5,949 Adoption of ASC 606 16,199 Additional deferred contract acquisition costs 1,439 Amortization of deferred contract acquisition costs (1,675 ) Balances at March 31, 2018 21,912 Additional deferred contract acquisition costs 3,096 Amortization of deferred contract acquisition costs (1,726 ) Balances at June 30, 2018 23,282 Additional deferred contract acquisition costs 3,345 Amortization of deferred contract acquisition costs (2,155 ) Balances at September 30, 2018 24,472 Additional deferred contract acquisition costs 5,768 Amortization of deferred contract acquisition costs (2,197 ) Balances at December 31, 2018 $ 28,043 Deferred revenue (current) Deferred revenue (non-current) Balances at December 31, 2017 $ 73,671 $ 9,454 Adoption of ASC 606 (9,508 ) 786 Increase (decrease), net 4,576 2,679 Balances at March 31, 2018 68,739 12,919 Increase (decrease), net 6,504 886 Balances at June 30, 2018 75,243 13,805 Increase (decrease), net 5,004 149 Balances at September 30, 2018 80,247 13,954 Increase (decrease), net 15,672 4,428 Balances at December 31, 2018 $ 95,919 $ 18,382 The deferred revenue balance decreased as of January 1, 2018 primarily due to the impacts of upfront recognition of term license revenue which were delivered prior to January 1, 2018, and from allocation of transaction prices based on performance obligations on revised standalone selling price (SSP) methodologies. Under the prior standard, the entire transaction fee was recognized ratably, however the revised standard requires upfront recognition of a portion of the transaction price allocated to the term license delivered at the inception of the arrangement. Revenue recognized during the 2018 reporting period that was previously deferred at January 1, 2018 was $ 75.0 Contract assets primarily relate to unbilled amounts, which are netted with deferred revenue at contract level, and typically result from sales contracts when revenue recognized exceeds the amount billed to the customer, and the right to payment is subject to more than the passage of time. The contract assets are transferred to accounts receivable when the rights become unconditional. During the year ended December 31, 2018, other significant changes to the opening and closing balances include contract assets of $6.3 million that were reclassified to receivables. During the year ended December 31, 2018, there were no impairment losses recognized on contract assets. Remaining performance obligation The Company applied the practical expedient in accordance with ASC 606 to exclude contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed. This primarily consists of professional services contracts that are on a time-and-material basis and for contracts with an original expected length of one year or less. Our contracts with customers include amounts allocated to performance obligations that will be satisfied at a later date. Remaining performance obligations represent contracted revenue that has not yet been recognized and include deferred revenues, invoices that have been issued to customers but have not been recognized as revenues and amounts that will be invoiced and recognized as revenue in future periods. As of December 31, 2018, amounts allocated to these additional contractual obligations are $165.1 million, of which we expect to recognize $109.7 million as revenue over the next 12 months with the remaining amount thereafter. Assets Recognized from the Costs to Obtain our Contracts with Customers As of December 31, 2018, $8.4 million of our deferred contract acquisition costs that are expected to be amortized within the next 12 months and therefore are included in prepayments and other current assets. The remaining amount of our deferred contract acquisition costs are included in other non-current assets. There were no impairments of assets related to deferred contract acquisition costs during the year ended December 31, 2018. The cumulative adjustment to our deferred cost balance as of January 1, 2018 represents the incremental cost to obtain contracts for contracts which were not complete as of the adoption date, that were expensed pursuant to the prior standard but require capitalization under the revised standard. Deferred contract acquisition costs, which primarily consist of cumulative capitalized incremental costs to obtain contracts were $28.0 million as of December 31, 2018 and $22.1 million as of January 1, 2018, of which $16.2 million was due to the adoption of the revised standard. For the year ended December 31, 2018, amortization of deferred contract acquisition costs of $7.8 million were recorded, and there were no impairments of deferred contract acquisition costs.

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	4. Goodwill Goodwill represents the excess of the purchase price over the identifiable tangible and intangible assets acquired plus liabilities assumed arising from business combinations. The carrying amount of goodwill was $219.4 million at December 31, 2018 and 2017 as there has been no acquisition activity in these periods.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	5. Intangible Assets Total cost and amortization of intangible assets comprised of the following: As of December 31, Weighted Average Useful Life 2018 2017 Intangible assets, net (In years) (In thousands) Customer lists 15 $ 42,500 $ 42,500 Developed technology 9.6 42,000 42,000 Trade names and trademarks 17 24,500 24,500 Order backlog 1.5 1,100 1,100 Non-competition agreements and other related items 4.9 3,310 810 Total intangible assets 113,410 110,910 Less: Accumulated amortization (38,550 ) (29,725 ) Total intangible assets, net $ 74,860 $ 81,185 In December 2018, the Company purchased certain technology patents from an unrelated third party for approximately $2.5 million. These patents pertain to technology that the Company plans to use by incorporating into or expanding its current products and will be amortized on a straight-line basis over five years. Amortization expense is included in the consolidated statements of operations for each of the years ended December 31, 2018, 2017 and 2016, respectively, as follows: Year Ended December 31, 2018 2017 2016 (In thousands) Cost of revenue - licenses $ 4,032 $ 4,032 $ 4,032 Cost of revenue - subscription 384 384 384 Research and development 136 149 162 General and administrative — — 100 Sales and marketing 4,273 4,276 4,414 Total amortization of intangibles $ 8,825 $ 8,841 $ 9,092 Periodically, the Company evaluates intangible assets for possible impairment. There were no impairments for intangible assets during the years ended December 31, 2018, 2017 and 2016. The total estimated future amortization expense of these intangible assets as of December 31, 2018 is as follows: Year ending December 31, (In thousands) 2019 $ 9,325 2020 9,262 2021 9,189 2022 8,861 2023 8,475 Thereafter 29,748 Total amortization expense $ 74,860

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	6. Commitments and Contingencies Operating Leases The Company leases its facilities under non-cancelable operating lease agreements. The majority of these agreements include a renewal option, and/or require the Company to pay taxes, insurance, and maintenance costs, which are not included in the table below. Certain of these facility leases contain predetermined fixed escalations of the minimum rentals, and the Company recognizes expense for these leases on a straight-line basis. The difference between the recognized rental expense and amounts payable under the lease is recorded as deferred rent included in other long-term liabilities on the accompanying consolidated balance sheets. Future minimum annual lease payments under these non-cancelable operating leases and contractual commitments, including hosting service agreements, as of December 31, 2018 are as follows (in thousands): Year ending December 31, Operating leases Contractual commitments 2019 $ 3,112 $ 6,006 2020 4,454 2,577 2021 4,997 130 2022 4,921 — 2023 4,552 — Thereafter 27,575 — Total minimum lease payments $ 49,611 $ 8,713 Rent expense under all operating leases was approximately $3.8 million, $2.9 million and $1.8 million, for the years ended December 31, 2018, 2017 and 2016, respectively. The Company had a deferred rent balance of approximately $1.4 million as of December 31, 2017, which is included in accrued expenses and other liabilities on the accompanying consolidated balance sheets. The deferred rent balance as of December 31, 2018 was $9.8 million, included in other long-term liabilities on the accompanying consolidated balance sheets. Indemnification Arrangements In the ordinary course of business, the Company enters into contractual arrangements under which it agrees to provide indemnification of varying scope and terms to customers, business partners and other parties with respect to certain matters, including, losses arising out of the breach of such agreements, intellectual property infringement claims made by third parties, and other liabilities with respect to our products and services and business. In these circumstances, payment may be conditional on the other party making a claim pursuant to the procedures specified in a particular contract. The Company includes service level commitments to our cloud customers warranting certain levels of uptime reliability and performance and permitting those customers to receive credits in the event that we fail to meet those levels. To date, the Company has not incurred any material costs as a result of these commitments, and we expect the time between any potential claims and issuance of the credits to be short. As a result, we have not accrued any liabilities related to these commitments in our consolidated financial statements. Litigation Claims and Assessments The Company is subject to claims and suits that may arise from time to time in the ordinary course of business. In addition, some legal actions, claims and governmental inquiries may be instituted or asserted in the future against us and our subsidiaries. Although the outcome of our legal proceedings cannot be predicted with certainty and no assurances can be provided, based upon current information, we do not believe the liabilities, if any, which may ultimately result from the outcome of such matters, individually or in the aggregate, will have a material adverse impact on our consolidated financial statements.

Line of Credit and Long-Term De

Line of Credit and Long-Term Debt	12 Months Ended
	Dec. 31, 2018
Line Of Credit Facility [Abstract]
Line of Credit and Long-Term Debt	7. Line of Credit and Long-Term Debt In August 2016, the Company entered into a senior secured credit facility with a financial institution in the amount of $120.0 million, consisting of a term loan facility of $115.0 million and a revolving loan facility of up to $5.0 million. The credit facility established first security for the financial institution over all assets of the Company and is subject to certain financial covenants. Borrowings under this agreement bear interest based on the adjusted LIBOR rate, as defined in the agreement with a 1% floor, plus an applicable margin of 8.0%. The maturity date on the term loan was August 16, 2021, with principal payment due in full on maturity date, and interest payments due quarterly. The agreement also required prepayments in the case of certain events including: asset sales in excess of $1 million, proceeds from an initial public offering (“IPO”), proceeds in excess of $1 million from an insurance settlement, or proceeds from a new debt agreement. Beginning with the year ended December 31, 2017, an additional prepayment was incurred due related to excess cash flow for the respective measurement periods. On June 28, 2017, the Company amended and restated its loan agreement to enter into a series of transactions in which the Company incurred $50.0 million of incremental debt which expanded the current facility to $167.5 million consisting of a $160.0 million term loan and a $7.5 million revolving credit facility, undrawn at close. Proceeds were used to partially fund $50.4 million in accumulated preferred stock dividends for shares of preferred stock through December 15, 2016. Borrowings bear interest based on the adjusted LIBOR rate, as defined in the agreement with a 1% floor, plus an applicable margin of 7.0%. The rate prevalent at December 31, 2017 was 8%, consisting of the 1% floor plus 7% margin. In 2017, the Company amended its existing credit facility in connection with the consummation of its initial public offering. Such amendment required that the Company use a portion of its net proceeds to repay $90.0 million of borrowings outstanding under our term loan facility to reduce the aggregate outstanding principal amount thereof to $70.0 million. This repayment was subject to a prepayment premium of 1.50%, approximately $1.4 million, which is recorded as interest expense. As a result of this paydown, the Company incurred a $1.7 million loss on the modification and partial extinguishment of debt which was also recorded as interest expense in the accompanying consolidated statements of operations for the year ended December 31, 2017. In 2017, the Company incurred total debt issuance costs of $4.5 million in connection with these loan and security agreements, of which $1.4 million relates to the modified agreement. These costs were to be amortized to interest expense over the life of the debt on a straight-line basis, which approximates the effective interest rate method. Amortization of debt issuance costs for existing loan and security agreement for the years ended December 31, 2018 and 2017 were approximately $0.2 million and $0.7 million respectively, was recorded in interest expense in the accompanying consolidated statements of operations. As of December 31, 2017, the consolidated balance sheet included unamortized debt issuance costs of approximately $1.8 million included in long-term debt. The outstanding balance of the term loan at December 31, 2017 was $70.0 million. On June 29, 2018, the Company voluntarily prepaid $60.0 million of the borrowings outstanding under its remaining term loan to reduce the aggregate outstanding principal balance to $10.0 million. On November 29, 2018, the Company repaid the remaining balance of borrowings outstanding under the term loan facility and terminated the credit facility. The 2018 repayments were subject to a prepayment premium of 0.50%. The Company paid approximately $0.4 million in prepayment premiums as a result of the prepayments, which is recorded as interest expense in the consolidated statements of operations. In connection with the debt paydowns, the Company incurred a $1.8 million loss on the modification and extinguishment of debt which is also recorded as interest expense. On October 5, 2017, in connection with our corporate headquarters lease, a standby letter of credit in the amount of $6.0 million was executed. On November 29, 2018, as a result of the prepayment of the term loan, the standby letter of credit was cancelled and replaced by the 2018 Letter of Credit on behalf of the Company by U.S. Bank National Association. The 2018 Letter of Credit is an irrevocable, cash collateralized, unconditional standby letter of credit in an aggregate amount of $6.0 million under the Company’s corporate headquarters lease. The cash used as collateral is included as restricted cash on the balance sheet as of December 31, 2018.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	8. Related Party Transactions In 2016, the Company entered into agreements totaling approximately $626,000 with certain non-executive employees related to their personal tax liabilities. These agreements will be forgiven over a three-year period, beginning in 2016, if the employees remain employed by the Company through the applicable dates. During the year ended December 31, 2016, $0.2 million were forgiven related to the agreement. All the remaining balances related to these agreements were forgiven in 2017. No amounts were forgiven during the year ended December 31, 2018. In September 2014, the Company entered into an advisory services agreement (the “Consulting Agreement”) with its controlling entity. The Consulting Agreement required quarterly payments from September 8, 2014 through December 31, 2018 for business consulting services provided by the controlling entity. Consulting fees from the Consulting Agreement totaled $1.1 million and $1.0 million in the years ended December 31, 2017 and 2016, respectively, and are included in general and administrative expenses on the accompanying consolidated statements of operations. Upon completion of the Company’s initial public offering, the Consulting Agreement ceased, and the Company was no longer required to make future payments. Throughout 2017 and 2016 the Company engaged in ordinary sales transactions of $858,000 and $37,000, and purchase transactions of $942,000 and $313,000, respectively, with entities affiliated with its controlling entity. At December 31, 2017, the accompanying consolidated balance sheets included accounts payable balances of $3,400, as well as accounts receivable balances $516,000, associated with these transactions. As of August 13, 2018, Thoma Bravo is no longer considered a controlling entity.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Stockholders' Equity	9. Stockholders’ Equity In November 2017, the board of directors and stockholders approved the Amended and Restated Certificate of Incorporation to increase the authorized capital stock to 310,000,000 shares, consisting of 300,000,000 shares of common stock and 10,000,000 shares of preferred stock, each with par value of $0.0001 per share. Common stock The Company’s Amended and Restated Certificate of Incorporation authorizes issuance of 300,000,000 shares of common stock with a par value of $0.0001 per share. The common stock confers upon its holders the right to participate in the general meetings of the Company, to vote at such meetings (each share represents one vote), to elect board members and to participate in any distribution of dividends, payments of the Company’s debts, other payments required by law, or other property and amounts payable upon shares of preferred stock, including the distribution of surplus assets upon liquidation equally on a per share basis. The rights of the holders of common stock will be subject to, and may be adversely affected by, the rights of holders of any preferred stock that may be issued in the future. Preferred stock The company is authorized, subject to any limitations prescribed by law, without stockholder approval, to issue from up to an aggregate of 10,000,000 shares of preferred stock, in one or more series, each series to have such rights, preferences and limitations, including voting rights, dividend rights, conversion rights, redemption privileges and liquidation preferences as determined by the board of directors. As of December 31, 2018, the Company does not have any shares of preferred stock outstanding and currently has no plans to issue shares of preferred stock. Redeemable Convertible Preferred Stock Prior to the November 2017 Amended and Restated Certificate of Incorporation, the Company classified the redeemable convertible preferred stock outside of stockholders’ equity (deficit) as required by ASC 480-10-S99 since the shares possessed liquidation features which may have triggered a distribution that was not solely within the Company’s control. Pursuant to the Company’s Amended and Restated Certificate of Incorporation in effect prior to the IPO, a deemed liquidation event would have occurred upon the closing of the transfer of the Company’s securities to a person or a group of affiliated persons, in one or a series of related transactions, if immediately after such transaction, such person or group of affiliated persons would hold 50% or more of the outstanding voting stock of the Company. The holders of a majority of the outstanding preferred stock may elect to require that all or any portion of the preferred stock held by them be redeemed in connection with any of the following (each of which is defined as a “Fundamental Change”): (i) a change in control of the Company, (ii) a sale of 50% or more of the assets of the Company and its subsidiaries, and (iii) a merger or consolidation to which the Company is a party, except for a merger where the Company is the surviving corporation, the terms of the preferred stock are not changed and the preferred stock is not exchanged for cash, securities or other properties, and the holders of a majority of the voting power (with respect to election of directors) of the Company’s capital stock immediately prior to the merger shall continue to hold a majority of the voting power following the merger. Upon such election, each other holder of preferred stock may also require that all or any portion of the preferred stock held by them be redeemed in connection with such Fundamental Change. Upon the closing of the IPO on November 17, 2017, all shares of the Company’s outstanding redeemable convertible preferred stock automatically converted into shares of common stock. As of such date, no redeemable convertible preferred stock was authorized or issued and outstanding. Dividends Prior to November 2017, the holders of the Company’s redeemable convertible preferred stock were entitled to dividends when and if declared by the board of directors. Dividends were payable in preference and priority to any payment of any dividend on the Company’s common stock. Dividends on redeemable convertible preferred stock were cumulative and compounded daily at a rate of 9% per annum, equivalent to $90 per share of preferred stock. On June 27, 2017, the board of directors declared, and the Company paid, an aggregate cash dividend of $50.4 million on the issued and outstanding shares of the Company’s preferred stock. The accumulated payment was made to eligible stockholders effective through December 15, 2016 and was primarily funded with the proceeds from the financing arrangement as noted in Note 7. Upon completing the initial public offering in November 2017, 223,816 shares of redeemable convertible preferred shares, with cumulative undeclared and unpaid dividends of $22.2 million, were converted to 20,500,400 shares of common stock. Treasury Stock During 2014, the Company entered into “Employee Purchase Agreements” with certain of its employees. Pursuant to the Employee Purchase Agreements, shares issued to the employee can be repurchased when the employee leaves the Company, subject to certain pricing parameters. Any shares purchased have been held in the Company’s treasury. The Company accounts for treasury stock under the cost method and includes treasury stock as a component of stockholders’ equity (deficit). As of December 31, 2017, the Company had repurchased 190,434 shares, cumulatively, of its common stock for approximately $0.5 million, at an average cost of $2.56 per share

Stock Option Plans and Stock-Ba

Stock Option Plans and Stock-Based Compensation	12 Months Ended
	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Option Plans and Stock-Based Compensation	10. Stock Option Plans and Stock-Based Compensation 2015 Stock Option Plans In 2015, the Company adopted (i) the Amended and Restated 2015 Stock Option and Grant Plan and (ii) the 2015 Stock Incentive Plan (together the “2015 Stock Option Plans”) under which it may grant incentive stock options (“ISOs”), nonqualified stock options (“NSOs”) for the right to purchase shares of common stock and grant restricted stock units. The 2015 Stock Option Plans reserve 5,000,000 shares of common stock for issuance as ISOs, 500,000 shares of restricted stock and 250,000 shares for issuance under the 2015 Stock Incentive Plan. Under the 2015 Stock Option Plans, ISOs may not be granted at less than fair market value on the date of the grant and generally vest over a four-year period based on continued service. Certain options are subject to vesting based on certain future performance targets. Options generally expire ten years after the grant date. At December 31, 2018, 530,953 shares were available for issuance under the Amended and Restated 2015 Stock Option and Grant Plan. At December 31, 2018, 118,050 shares were available for issuance under the 2015 Stock Incentive Plan. The Company currently uses authorized and unissued shares to satisfy share award exercises. 2017 Long Term Incentive Plan In November 2017, the Company’s board of directors adopted the 2017 Long Term Incentive Plan (the “2017 Plan”) under which it may grant stock options, nonqualified stock options to purchase shares of common stock and restricted stock units. As of December 31, 2018, the Company had reserved 8,856,876 shares of common stock available for issuance under the 2017 Plan to employees, directors, officers and consultants of the Company and its subsidiaries. The number of shares of common stock available for issuance under the 2017 Plan will be increased on each January 1 hereafter by 4,428,438 shares of common stock. Options and RSUs granted under the 2017 Plan generally vest over four years. Common stock subject to an award that expires or is canceled, forfeited, exchanged, settled in cash or otherwise terminated without delivery of shares, and shares withheld or surrendered to pay the exercise price of, or to satisfy the withholding obligations with respect to an award, will become available for future grants under the 2017 Plan. At December 31, 2018, 6,304,769 shares were available for issuance under the 2017 Plan. The Company currently uses authorized and unissued shares to satisfy share award exercises. Employee Stock Purchase Plan In November 2017, the Company’s board of directors adopted the Employee Stock Purchase Plan (the "ESPP"). The ESPP became effective November of 2017, after the date our registration statement was declared effective by the SEC. The Company initially reserved 1,771,375 885,688 October 30, 2020 ESPP purchase rights have an expected volatility that is based on the historical volatility of the common stock of a collection of our peers in the market. The expected term represents the period of time the ESPP purchase rights are expected to be outstanding and approximates the offering period. As of December 31, 2018, approximately 168,000 shares of common stock have been purchased or distributed pursuant to the ESPP. The fair value for the Company’s stock options and ESPP shares granted during the years ended December 31, 2018, 2017 and 2016 was determined using a Black Scholes option-pricing model with the following assumptions: Time Based Performance Based Stock Options December 31, 2018 December 31, 2017 December 31, 2016 December 31, 2017 December 31, 2016 Expected dividend rate 0% 0% 0% 0% 0% Expected volatility 40.0% - 46.0% 40.9% - 49.0% 49.0% 40.9% - 49.0% 49.0% Risk-free interest rate 2.63% - 2.97% 1.96% - 2.18% 1.31% - 2.24% 1.96% - 2.18% 1.27% - 2.16% Expected term (in years) 6.25 6.25 5.50 - 6.25 5.50 - 6.29 5.75 - 6.4 ESPP Expected dividend rate 0% NA NA NA NA Expected volatility 40.0% - 46.0% NA NA NA NA Risk-free interest rate 2.00% - 2.56% NA NA NA NA Expected term (in years) 0.50 NA NA NA NA The risk-free interest rate is based on the U.S. treasury yield curve for the term consistent with the life of the stock options as of the date of grant. The Company has elected to apply the “shortcut approach” in developing the estimate of expected term for “plain vanilla” stock options by using the mid-point between the vesting date and contractual termination date. The Company has not paid, and does not anticipate paying, cash dividends on its common stock; therefore, the expected dividend yield is assumed to be zero. The Company has determined the volatility for stock options granted based on an analysis of reported data for a comparable peer group of companies that issued stock options with substantially similar terms. The Company did not utilize its own historic volatility because, prior to November 2017, there was no public market for the Company’s common stock, and current time in the public market was not sufficiently long. The expected volatility of stock options granted has been determined using an average of the historical volatility measures of this peer group of companies consistent with the life of the options. The Company expects all outstanding stock options at December 31, 2018 to fully vest. The weighted average grant date fair value per share for the year ended December 31, 2018, 2017 and 2016 was $10.35, $4.32 and $0.83, respectively. The total fair value of shares vested during the years ended December 31, 2018, 2017 and 2016 was approximately $2.4 million, $0.3 million and $0.6 million, respectively. The following table summarizes activity for time-based stock options during the years ended December 31, 2018, 2017 and 2016: Number of Options Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value Balances at December 31, 2015 1,326,449 $ 2.38 9.7 Granted 419,839 $ 1.69 Exercised (6,568 ) $ 1.77 Forfeited (117,602 ) $ 2.31 Balances at December 31, 2016 1,622,118 $ 2.21 8.9 $ 1,546,599 Options vested and expected to vest at December 31, 2016 1,622,118 $ 2.21 8.9 $ 1,546,599 Options vested and exercisable at December 31, 2016 416,265 $ 2.36 8.7 $ 340,334 Balances at December 31, 2016 1,622,118 $ 2.21 8.9 $ 1,546,599 Granted 1,592,370 $ 9.54 Conversion of performance to time based 591,892 $ 2.53 Exercised (152,330 ) $ 2.22 Forfeited (153,975 ) $ 2.21 Balances at December 31, 2017 3,500,075 $ 5.43 8.8 $ 31,784,488 Options vested and expected to vest at December 31, 2017 3,500,075 $ 5.43 8.8 $ 31,784,488 Options vested and exercisable at December 31, 2017 926,614 $ 2.28 7.9 $ 11,324,729 Balances at December 31, 2017 3,500,075 $ 5.43 8.8 $ 31,784,488 Granted 82,549 $ 23.17 Exercised (637,188 ) $ 2.84 Forfeited (128,110 ) $ 3.20 Balances at December 31, 2018 2,817,326 $ 6.64 8.0 $ 47,589,066 Options vested and expected to vest at December 31, 2018 2,817,326 $ 6.64 8.0 $ 47,589,066 Options vested and exercisable at December 31, 2018 1,095,211 $ 4.72 7.4 $ 20,557,640 The following table summarizes the status of the Company’s non-vested time-based vesting stock options for the years ended December 31, 2018, 2017 and 2016: Number of Shares Weighted Average Grant Date Fair Value Non-vested at December 31, 2015 1,315,668 $ 1.15 Granted 401,094 $ 0.81 Vested (382,364 ) $ 1.16 Forfeited (117,602 ) $ 1.12 Non-vested at December 31, 2016 1,216,796 $ 1.05 Granted 1,592,370 $ 4.13 Conversion of vested performance to time based 322,988 $ 11.95 Vested (437,829 ) $ 1.04 Forfeited (111,076 ) $ 1.07 Non-vested at December 31, 2017 2,583,249 $ 4.32 Granted 82,549 $ 10.35 Vested (816,454 ) $ 2.99 Forfeited (121,728 ) $ 2.32 Non-vested at December 31, 2018 1,727,616 $ 5.47 The total unrecognized compensation expense related to non-vested time-based vesting stock options granted is $7.5 million and is expected to be recognized over a weighted average period of 2.1 years as of December 31, 2018. The following table summarizes activity of performance vesting stock options for the years ended December 31, 2017 and 2016. There was no activity of performance vesting stock options for the year ended December 31, 2018 as all performance vesting options were modified to become service-based vesting stock options during the fourth quarter of 2017. Number of Options Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value Balances at December 31, 2015 322,846 $ 2.32 9.7 Options vested and expected to vest at December 31, 2015 322,846 $ 2.32 9.7 Options vested and exercisable at December 31, 2015 33,613 $ 2.33 9.5 Balances at December 31, 2015 322,846 $ 2.32 9.7 Granted 101,427 $ 1.77 Exercised (4,000 ) $ 1.36 $ 1,942 Forfeited (7,500 ) $ 2.42 Balances at December 31, 2016 412,773 $ 2.19 8.9 $ 401,616 Options vested and expected to vest at December 31, 2016 412,773 $ 2.19 8.9 $ 401,616 Options vested and exercisable at December 31, 2016 142,391 $ 2.22 8.8 $ 134,871 Balances at December 31, 2016 412,773 $ 2.19 8.9 $ 401,616 Granted 187,469 $ 3.27 Exercised (8,350 ) $ 2.38 $ 101,178 Conversion of shares (591,892 ) $ 2.53 8.5 Options vested and expected to vest at December 31, 2017 — $ — — $ — Options vested and exercisable at December 31, 2017 — $ — — $ — The performance vesting stock options are subject to performance requirements, determined prior to the grant date, based on the Company meeting certain annual earnings before interest, taxes, depreciation and amortization, (“EBITDA”) targets as set by the Board of Directors for the applicable years. During the years ended December 31, 2017 and 2016, the Board of Directors waived the EBITDA criteria associated with the annual tranche of performance vesting stock options resulting in a modification. These modifications impacted 34 and 26 employees and resulted in incremental stock-based compensation expense of $45,000 and $98,000 for the years ended December 31, 2017 and 2016, respectively. During the fourth quarter of 2017, all performance vesting options were modified to become time vesting stock options, affecting approximately 40 employees. No other terms of the options were modified. This modification resulted in recognition of incremental stock compensation expense of $74,000 in 2017 and incremental future stock-based compensation expense of $3.6 million to be recognized over the remaining vesting period of these options. A summary of the status of the Company’s non-vested performance vesting stock options as of December 31, 2017 and 2016, and changes during the year ended December 31, 2017 and 2016 are presented below. There was no activity of performance non-vested stock options for the year ended December 31, 2018 as all performance non-vested options were modified to become service-based vesting stock options during the fourth quarter of 2017. Number of Shares Weighted Average Grant Date Fair Value Non-vested at December 31, 2015 289,233 $ 1.11 Granted 101,427 $ 0.84 Vested (106,903 ) $ 0.99 Forfeited (6,563 ) $ 1.18 Non-vested at December 31, 2016 277,194 $ 1.01 Granted 187,469 $ 1.55 Vested (141,675 ) $ 1.54 Conversion of non-vested performance to time-based (322,988 ) $ 11.95 Non-vested at December 31, 2017 — $ — Incentive Unit Plan In 2014 and 2015, the Company granted shares of the Company’s common stock (the “incentive units”) to certain members of management pursuant to restricted stock agreements (the “RSAs”). The incentive units were granted with an exercise price equal to the fair market value on the date of grant, are subject to vesting, and if exercised in advance of vesting were subject to the Company’s right to repurchase. Upon vesting, the incentive units automatically convert to common stock. 50% of incentive units granted to executives vest based on performance meeting or exceeding EBITDA targets, as defined in the RSAs. Incentive units granted to non-executives and the remaining 50% of incentive units granted to executives vest 25% on the first anniversary date of the grant, and ratably over the remaining three years. The graded-vesting attribution method is used by the Company to determine the monthly stock-based compensation expense over the applicable vesting periods. The liability for the cash paid to the Company prior to conversion of the incentive units to shares of common stock, was approximately $37,000 and $116,000 at December 31, 2018 and December 31, 2017. During the year ended December 31, 2017, the board of directors waived the EBITDA criteria associated with the annual tranche of performance vesting stock options resulting in a modification. This modification impacted 32 employees and resulted in incremental stock-based compensation expense of $2.4 million. During the fourth quarter of 2017, all incentive units originally granted with performance vesting criteria were modified to vest over time, impacting approximately 32 employees and resulting in incremental stock-based compensation expense of $0.6 million. Additionally, during the fourth quarter of 2017, the board of directors approved accelerated vesting of restricted stock for an exiting board member that resulted in an incremental stock-based compensation expense of approximately $154,000. There were no material modifications during the year ended December 31, 2018. A summary of the Company’s non-vested incentive unit activity as of December 31, 2018, changes during the year ended December 31, 2018, 2017 and 2016 are presented below: Number of Shares Weighted- average exercise price (In thousands) (per share) Non-vested at December 31, 2015 5,526 $ 0.0517 Granted (1,677 ) $ 0.0517 Vested 7 $ 0.0517 Forfeited (20 ) $ 0.0517 Other (1) 291 $ 0.0517 Non-vested at December 31, 2016 4,127 $ 0.0517 Vested (1,846 ) $ 0.0517 Forfeited (39 ) $ 0.0517 Non-vested at December 31, 2017 2,242 $ 0.0517 Vested (1,503 ) $ 0.0517 Forfeited (16 ) $ 0.0517 Non-vested at December 31, 2018 723 $ 0.0517 (1) The non-vested total from December 31, 2016 has been adjusted to include incentive units previously issued. The company did not grant any additional incentive units during the year ended December 31, 2018. The total unrecognized compensation expense related to non-vested incentive units granted is approximately $0.3 million and is expected to be recognized over a weighted-average period of 0.1 year as of December 31, 2018. The total intrinsic value of units unvested as of December 31, 2018, 2017 and 2016 was $17.0 million, $32.5 million and $8.5 million, respectively. Restricted Stock Units During the year ended December 31, 2018, we awarded RSUs to certain employees, with a weighted-average grant date fair value of $19.30 per share. RSUs are generally subject to forfeiture if employment terminates prior to the vesting date. We expense the cost of the RSUs, which is determined to be the fair market value of the shares of common stock underlying the RSUs on the date of grant, ratably over the period during which the vesting restrictions lapse. The following provides a summary of the restricted stock unit activity for the Company for the years ended December 31, 2018 and 2017: Number of Shares Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value (In thousands) Weighted Average Grant Date Fair Value Balances at December 31, 2016 — $ — Granted 897,284 $ 12.18 Vested — — Forfeited — — Balances at December 31, 2017 897,284 9.9 $ 186 $ 12.18 Units expected to vest at December 31, 2017 897,284 9.9 $ 186 $ 12.18 Balances at December 31, 2017 897,284 9.9 $ 186 $ 12.18 Granted 576,798 $ 19.30 Vested (270,884 ) $ 12.61 Forfeited (55,195 ) $ 17.58 Balances at December 31, 2018 1,148,003 1.8 $ 26,967 $ 15.40 Units expected to vest at December 31, 2018 1,148,003 1.8 $ 26,967 $ 15.40 The total unrecognized compensation expense related to restricted stock units is $15.4 million for December 31, 2018 and is expected to be recognized over a weighted average period of 3.0 years. A summary of the Company’s stock-based compensation expense, which includes stock options, restricted stock units, employee stock purchase plan and incentive units, recognized is presented below: Year Ended December 31, 2018 2017 2016 (In thousands) Stock options $ 3,943 $ 1,011 $ 508 Incentive units 8,582 3,185 60 RSUs 5,352 318 — ESPP 1,098 — — Total stock-based compensation expense $ 18,975 $ 4,514 $ 568 A summary of the Company’s stock-based compensation expense as recognized on the consolidated statements of operations is presented below: Year Ended December 31, 2018 2017 2016 (In thousands) Cost of revenue - subscription $ 945 $ 133 $ 34 Cost of revenue - services and other 1,504 458 63 Research and development 3,026 658 118 General and administrative 7,798 2,062 96 Sales and marketing 5,702 1,203 257 Total stock-based compensation expense $ 18,975 $ 4,514 $ 568

Balance Sheet Related Items

Balance Sheet Related Items	12 Months Ended
	Dec. 31, 2018
Disclosure Text Block Supplement [Abstract]
Balance Sheet Related Items	11. Balance Sheet Related Items Property and Equipment, Net The cost and accumulated depreciation of property and equipment are as follows: As of December 31, 2018 2017 (In thousands) Property and equipment, net Computer equipment $ 6,968 $ 4,559 Buildout in progress 15,295 — Other assets 1,218 833 Total property and equipment 23,481 5,392 Less: accumulated depreciation (4,213 ) (2,374 ) Total property and equipment, net $ 19,268 $ 3,018 Depreciation expense was $1.9 million, $1.4 million and $0.9 million for the years ended December 31, 2018, 2017 and 2016, respectively. There were no impairments of our property and equipment for the years ended December 31, 2018, 2017 and 2016. During the year ended December 31, 2018, we continued to build out our Company’s corporate headquarters resulting in $15.3 million in additions to property and equipment which will be placed in service in 2019. These assets are amortized over useful lives ranging from 3 to 10 years. Accrued Expenses and Other Liabilities Accrued expenses consisted of the following: As of December 31, 2018 2017 (In thousands) Commissions $ 7,731 $ 8,559 Bonus 4,829 5,063 Payroll and related benefits 2,209 2,640 Partner and customer programs 1,538 1,234 Sales and other taxes 2,798 1,373 Other 2,626 3,767 Total $ 21,731 $ 22,636

Prepayments and Other Assets

Prepayments and Other Assets	12 Months Ended
	Dec. 31, 2018
Prepaid Expense And Other Assets Current [Abstract]
Prepayments and Other Assets	Prepayments and Other Assets Prepayments and other assets include the balance of prepaid expenses, deferred contract acquisition costs Prepayments and other current assets consisted of the following: As of December 31, 2018 2017 (In thousands) Deferred contract acquisition costs $ 8,392 $ 2,931 Prepaid expenses 7,159 4,376 Contract assets 2,464 — Other 3,835 2,706 Total $ 21,850 $ 10,013 Other non-current assets consisted of the following: As of December 31, 2018 2017 (In thousands) Deferred contract acquisition costs $ 19,651 $ 3,018 Prepaid expenses 276 192 Contract assets 84 — Other 363 332 Total $ 20,374 $ 3,542

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	12. Income Taxes Tax Reform On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “TCJA”). The TCJA makes broad and complex changes to the Code. The changes include, but are not limited to, lowering the U.S. corporate income tax rates, implementing a modified territorial tax system and imposing a one-time transition tax on deemed repatriated earnings of foreign subsidiaries. The Company has evaluated the impact of the TCJA for its year end income tax provision, the results of which are discussed below. Rate Reduction Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to reverse. The TCJA reduces the U.S. federal corporate income tax rate from 35% to 21% for tax years beginning after December 31, 2017. As a result, the Company has revalued its ending net deferred tax assets and liabilities at December 31, 2017 and recognized a $1.8 million tax benefit that was offset by a change in valuation allowance. Deemed Repatriation Transition Tax The TCJA provided for a one-time transition tax on the deemed repatriation of post-1986 undistributed foreign subsidiary earnings and profits (“E&P”). Substantially all of the Company’s foreign subsidiaries’ earnings and profits have previously been included in the Company’s U.S. income tax returns via Section 956. As a result, we recognized tax expense of $0 related to the transition tax. GILTI Tax While the TCJA transitions from a worldwide to a modified territorial tax system, global intangible low-taxed income (“GILTI”) provisions will be applied for tax years beginning after December 31, 2017 imposing an incremental tax on low-taxed foreign income. GILTI is the excess of the stockholder’s “net CFC tested income” over the net deemed tangible income return. Under GAAP, the Company is permitted to make an accounting policy election to either treat taxes due on future inclusions in U.S. taxable income related to GILTI as a current-period expense when incurred (the “period cost method”) or to factor such amounts into the Company’s measurement of its deferred taxes (the “deferred method”). The Company elected the "period cost method" as its accounting policy with respect to the new GILTI tax rules. For the year ended December 31, 2018, the Company determined it was in an aggregated test loss position with respect to its CFC’s. Thus, there is no GILTI tax liability as of December 31, 2018. Income Taxes The provision for income taxes is related to the profits generated in certain foreign jurisdictions by our consolidated subsidiaries. The following table presents consolidated income (loss) before income taxes as follows: Year Ended December 31, 2018 2017 2016 (In thousands) Domestic $ 6,951 $ (2,780 ) $ (2,435 ) Foreign (2,191 ) (2,519 ) (2,723 ) Total income (loss) before income taxes $ 4,760 $ (5,299 ) $ (5,158 ) The provision (benefit) for income taxes consisted of: Year Ended December 31, 2018 2017 2016 (In thousands) Current Federal $ — $ 293 $ — State 630 189 21 Foreign 1,740 1,997 531 Total current 2,370 2,479 552 Deferred Federal (699 ) (293 ) (1,315 ) State (581 ) 202 (118 ) Foreign — (95 ) (1,104 ) Total deferred (1,280 ) (186 ) (2,537 ) Provision (benefit) $ 1,090 $ 2,293 $ (1,985 ) Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred taxes are as follows: As of December 31, 2018 2017 (In thousands) Deferred tax assets: Research and development and other credits $ 4,461 $ 6,187 Net operating loss carryforward 8,147 14,795 Charitable contributions — — Deferred revenue 4,747 1,355 Stock compensation 1,046 125 Accrued expense 1,182 1,323 Depreciable and amortizable assets 54 29 Other 95 228 Total deferred tax assets 19,732 24,042 Deferred tax liabilities: Prepaid expenses (5,889 ) (1,249 ) Intangibles (15,280 ) (17,232 ) Total deferred tax asset (liability), net (1,437 ) 5,561 Less valuation allowance for deferred tax assets (2,705 ) (5,297 ) Net deferred tax assets (liabilities) $ (4,142 ) $ 264 As of December 31, 2018 and 2017, the Company had federal net operating loss carryforwards of approximately $23.2 million and $57.8 million, respectively, and research and development credits of approximately $5.3 million and $4.2 million, respectively, which will begin to expire beginning in 2034 and 2025, respectively, if not utilized prior to that time. Utilization of the net operating loss and research credit carryforwards is subject to an annual limitation due to the “change in ownership” provisions of the Internal Revenue Code. However, management has determined via a formal analysis that the annual limitation will not result in the expiration of net operating losses and research credit carryforwards prior to utilization. As of December 31, 2018 and 2017, the Company’s deferred tax assets exceeded the Company’s reversing taxable temporary differences in that foreign jurisdiction. Given the Company’s lack of earnings history in that foreign jurisdiction, management determined it was not more likely than not that the benefit of the Company’s deferred tax assets that exceeded its reversing taxable temporary differences would be realized. Thus, a valuation allowance totaling $2.7 million and $1.7 million was recorded as of December 31, 2018 and 2017, respectively. As of December 31, 2018, the Company’s U.S. reversing taxable temporary differences exceeded the Company’s U.S. gross deferred tax assets. As a result, management determined at December 31, 2018, that it was more likely than not that the benefit of the Company’s U.S. gross deferred tax assets would be realized. Thus, no valuation allowance was recorded as of December 31, 2018 and $3.6 million was recorded as of December 31, 2017 against the Company’s U.S. deferred tax assets that exceeded its reversing taxable temporary differences and the portion of state credits that are projected to expire unutilized. The Company’s provision for income taxes differs from the expected tax expense (benefit) amount computed by applying the statutory federal income tax rate of 21% and 34% for the years ended December 31, 2018, 2017 and 2016, respectively, to income before income taxes primarily due to permanent items, the research and development credit, foreign taxes and the application of a valuation allowance for the years ended December 31, 2018, 2017 and 2016. The following table reconciles the Company’s effective tax rate to the federal statutory tax rate: Year Ended December 31, 2018 2017 2016 U.S. federal taxes at statutory rate 21.0 % 34.0 % 34.0 % Foreign tax rate differentials 16.7 (9.1 ) (11.8 ) Research and development credit (26.2 ) 17.8 18.2 Foreign tax credit 0.0 18.3 4.7 Amended federal return due to law change (18.8 ) 0.0 0.0 Stock options (0.1 ) (23.6 ) (3.8 ) Permanent differences and other 3.8 (14.4 ) (7.8 ) State taxes, net of federal benefit 9.6 (4.0 ) (0.1 ) Change in state rate 0.0 (1.9 ) 7.3 Change in valuation allowance due to operations 21.1 (58.4 ) (1.9 ) Other (4.2 ) (2.0 ) (0.3 ) Total income tax (benefit) expense 22.9 % (43.3 )% 38.5 % The reconciliation of unrecognized tax benefits at the beginning and end of the year is as follows (in thousands): Balance at December 31, 2015 $ 686 Additions based on tax positions related to prior year 197 Balance at December 31, 2016 883 Additions based on tax positions related to prior year 507 Additions based on tax positions related to current year 473 Balance at December 31, 2017 1,863 Reductions based on tax positions related to prior year (263 ) Additions based on tax positions related to current year 687 Balance at December 31, 2018 $ 2,287 Beginning December 31, 2015, due to the existence of the valuation allowance, future changes in unrecognized tax benefits did not impact the Company’s effective tax rate. Included in the balance of unrecognized tax benefits as of December 31, 2018, 2017 and 2016 is $2.3 million, $1.9 million and $0.9 million, respectively, of tax benefits that, if recognized, would affect the Company’s effective tax rate. The Company’s practice is to recognize interest and/or penalties related to income tax matters in income tax expense. During the years ended December 31, 2018, 2017 and 2016 the Company did not record any material interest or penalties. The Company files income tax returns in the U.S. federal, states, and foreign jurisdictions. The Company is no longer subject to U.S. federal income tax examinations for years before 2015 and is no longer subject to state, local and foreign income tax examinations by tax authorities for years before 2014. The Company is currently under audit for income tax audit in a single foreign jurisdiction. The audit is in its initial stages and is not expected to materially impact the financial statements. The Company has a FIN 48 reserve related to this foreign jurisdiction filing that should sufficiently cover any related assessment.

Net Income (Loss) Per Share Att

Net Income (Loss) Per Share Attributable to Common Stockholders	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Net Income (Loss) Per Share Attributable to Common Stockholders	13. Net Income (Loss) Per Share Attributable to Common Stockholders The following table sets forth the calculation of basic and diluted net income (loss) per share during the periods presented: Year Ended December 31, 2018 2018 2017 2016 with adoption (ASC 606) without adoption (ASC 605) (as previously reported (ASC 605) (In thousands, except share data) Numerator: Net income (loss) $ 3,670 $ (2,333 ) $ (7,592 ) $ (3,173 ) Deemed dividends to preferred stockholders — — (21,129 ) (23,618 ) Earnings allocated to participating securities (29 ) (29 ) — — Net income (loss) available to common stockholders $ 3,641 $ (2,362 ) $ (28,721 ) $ (26,791 ) Denominator Weighted average shares outstanding Basic 86,495,301 86,495,301 52,339,804 45,933,218 Diluted 90,002,752 86,495,301 52,339,804 45,933,218 Net income (loss) attributable to common stockholders per share Basic $ 0.04 $ (0.03 ) $ (0.55 ) $ (0.58 ) Diluted $ 0.04 $ (0.03 ) $ (0.55 ) $ (0.58 ) (1) The comparative information for years prior to 2018 has not been adjusted to reflect the adoption of the revised standard and is reported on an ASC 605 basis. The following weighted average outstanding shares of common stock equivalents were excluded from the computation of the diluted net income (loss) per share attributable to common stockholders for the periods presented because their effect would have been anti-dilutive, and the convertible preferred stock is not included in these calculations as it is contingently convertible based upon a future event (see Note 9): Year Ended December 31, 2018 2017 2016 Stock options to purchase common stock 35,531 2,402,225 1,799,632 RSUs issued and outstanding 12,838 105,404 — Non-vested incentive units — 2,915,228 4,931,760 Total 48,369 5,422,857 6,731,392

Geographic Information and Majo

Geographic Information and Major Customers	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Geographic information and major customers	14. Geographic Information and Major Customers ASC 280, “Segment Reporting”, establishes standards for reporting information about operating segments. Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision makers in deciding how to allocate resources and in assessing performance. The Company manages its business on the basis of one reportable segment, and derives revenues from licensing of software, sale of professional services, maintenance and technical support. The following are a summary of consolidated revenues within geographic areas: Year Ended December 31, 2018 2018 2017 2016 with adoption (ASC 606) without adoption (ASC 605) as previously reported (ASC 605) (In thousands) United States $ 171,497 $ 169,927 $ 134,676 $ 92,116 EMEA (1) 49,871 49,854 33,097 25,668 Rest of the World (1) 27,552 28,694 18,283 14,628 Total revenue $ 248,920 $ 248,475 $ 186,056 $ 132,412 (1) No single country represented more than 10% of our consolidated revenue.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2018
Postemployment Benefits [Abstract]
Employee Benefit Plans	15. Employee Benefit Plans The Company has established a defined contribution savings plan under Section 401(k) of the Internal Revenue Code (the “401(k) Plan”). The 401(k) Plan covers substantially all employees who meet minimum age and service requirements and allows participants to defer a percentage of their annual compensation as defined in the 401(k) Plan. To date, the Company has made no contributions to the 401(k) Plan.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	16. Subsequent Events On March 11, 2019, SailPoint Technologies, Inc., as borrower, and certain of our other wholly owned subsidiaries entered into a credit agreement with the lenders party thereto, Citibank, N.A., as administrative agent, sole lead arranger and sole bookrunner, and Royal Bank of Canada and Bank of America, N.A., as co-documentation agents. The credit agreement provides for an initial $150 million in commitments for revolving credit loans, with a $15 million letter of credit sublimit, which amount can be increased or decreased under specified circumstances. As of March 11, 2019, SailPoint had no outstanding revolving credit loans. Borrowings under our credit agreement are scheduled to mature in March, 2024. Any borrowing under our credit agreement may be repaid, in whole or in part, at any time and from time to time without premium or penalty other than customary breakage costs, and any amounts repaid may be reborrowed. The interest rates applicable to revolving credit loans under our credit agreement are, at the borrower’s option, either (i) a base rate, which is equal to the greatest of (a) the Prime Rate (as defined in our credit agreement), (b) the Federal Funds Effective Rate (as defined in our credit agreement) plus 1/2 of 1%, and (c) the one-month Adjusted LIBO Rate (as defined in our credit agreement) plus 1%, in each case, plus an interest margin ranging from 0.25% to 0.75% based on the Senior Secured Net Leverage Ratio, or (ii) the Adjusted LIBO Rate plus an interest margin ranging from 1.25% to 1.75% based on the Senior Secured Net Leverage Ratio. The Adjusted LIBO Rate cannot be less than zero. The borrower will pay an unused commitment fee during the term of our credit agreement ranging from 0.20% to 0.30% per annum based on the Senior Secured Net Leverage Ratio.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements, which include the accounts of the Company and its wholly owned subsidiaries, have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The consolidated financial statements include the accounts of SailPoint Technologies Holdings, Inc. and its subsidiaries, SailPoint Technologies Intermediate Holdings, LLC, SailPoint Technologies, Inc., SailPoint Technologies UK LTD, SailPoint Holdings, Inc., SailPoint International, Inc., SailPoint Technologies India Private LTD, SailPoint Technologies Netherlands B.V., SailPoint Technologies Israel Ltd, SailPoint Technologies SARL, SailPoint Technologies GmbH, and SailPoint Technologies Pte. Ltd. and Whitebox Security Ltd. All intercompany accounts and transactions have been eliminated in consolidation. The Company operates as one operating segment. The Company’s chief operating decision makers, who review financial information presented on a consolidated basis for purposes of making operating decisions, assess financial performance and allocate resources. Accounting Principles We adopted the revised revenue recognition accounting standard, codified as Accounting Standards Codification (“ASC”) 606, effective January 1, 2018 on a modified retrospective basis (see Recently Adopted Accounting Pronouncements). Financial results for reporting periods during 2018 are presented in compliance with the revised revenue recognition standard. Historical financial results for reporting periods prior to 2018 are presented in conformity with amounts previously disclosed under the prior revenue recognition standard, ASC 605. These financial statements include additional information regarding the impacts from the adoption of the revised revenue recognition standard on our financial results for the year ended December 31, 2018. This includes the presentation of financial results for the year ended December 31, 2018 under ASC 605 for comparison to the prior year.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Management periodically evaluates such estimates and assumptions for continued reasonableness. In particular, we make estimates with respect to the fair value allocation of multiple performance obligation in revenue recognition, the uncollectible accounts receivable, valuation of long-lived assets, stock-based compensation expense and income taxes. Appropriate adjustments, if any, to the estimates used are made prospectively based upon such periodic evaluation. Actual results could differ from those estimates.
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted Cash We consider all highly liquid investments with an original maturity of three months or less from date of purchase to be cash equivalents. The Company is required to maintain a small amount of restricted cash to guarantee rent payments in a foreign subsidiary as well as $6.0 million of cash collateral for an unconditional standby letter of credit related to the Company’s corporate headquarters lease As of December 31, 2018 2017 (In thousands) Cash and cash equivalents per balance sheet $ 70,964 $ 116,049 Restricted cash per balance sheet 6,272 78 Cash, cash equivalents and restricted cash per cash flow $ 77,236 $ 116,127
Fair Value of Financial Instruments	Fair Value of Financial Instruments Assets and liabilities recorded at fair value in the financial statements are categorized based upon the level of judgment associated with the inputs used to measure their fair value. Hierarchical levels which are directly related to the amount of subjectivity associated with the inputs to the valuation of these assets or liabilities are as follows: • Level 1: Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2: Observable inputs, other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active 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 reflecting our own assumptions incorporated in valuation techniques used to determine fair value. These assumptions are required to be consistent with market participant assumptions that are reasonably available. The Company’s carrying amounts of financial instruments, including cash and cash equivalents, accounts receivable, accounts payable, and accrued expenses are considered Level 1 and approximate their fair values due to their short maturities as of December 31, 2018 and 2017. The carrying value of the Company’s line of credit and long-term debt approximate fair value and were valued using a Level 1 input, specifically the borrowing rates available to the Company at December 31, 2017. There was no line of credit or long-term debt at December 31, 2018.
Concentration of Credit and Other Risks	Concentration of Credit and Other Risks Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash and cash equivalents and accounts receivable. The Company maintains its cash in bank deposit accounts that, at times, may exceed federally insured limits. As of December 31, 2018, approximately 11% of the Company’s accounts receivable was from one customer. Management considers concentration of credit risk to be minimal with respect to accounts receivable due to the positive historical collection experience of the Company despite the geographic concentrations related to the Company’s customers. There was no concentration of credit risk for customers as of December 31, 2017 as no individual entity represented more than 10% of the balance in accounts receivable. No customer represented more than 10% of revenue in the years ended December 31, 2018, 2017 and 2016. The Company does not experience concentration of credit risk in foreign countries as no foreign country represents more than 10% of the Company’s consolidated revenues or net assets. The following tables sets forth the Company’s consolidated total revenue by geography: Year Ended December 31, 2018 2018 2017 (1) 2016 (1) with adoption (ASC 606) without adoption (ASC 605) as previously reported (ASC 605) (In thousands) United States $ 171,497 $ 169,927 $ 134,676 $ 92,116 EMEA (2) 49,871 49,854 33,097 25,668 Rest of the World (2) 27,552 28,694 18,283 14,628 Total revenue $ 248,920 $ 248,475 $ 186,056 $ 132,412 (1) The comparative information for years prior to 2018 has not been adjusted to reflect the adoption of the revised standard and is reported on an ASC 605 basis. For additional information see Note 3. (2) No single country represented more than 10% of consolidated revenue
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts The Company continuously assesses the collectability of outstanding customer invoices and in doing so, the Company assesses the need to maintain an allowance for estimated losses resulting from the non-collection of customer receivables. In estimating this allowance, the Company considers factors such as: historical collection experience, a customer’s current creditworthiness, customer concentrations, age of outstanding balances, both individually and in the aggregate, and existing economic conditions. Actual customer collections could differ from the Company’s estimates. The Company determined that an allowance for doubtful accounts was not required for the periods presented. The bad debt expense recognized for the year ended December 31, 2018 was $2.3 million. The bad debt expenses recognized for the years ended December 31, 2017 and 2016 were not material.
Property and Equipment, Net	Property and Equipment, Net Property and equipment, net, is stated at cost less accumulated depreciation. Depreciation is recorded using the straight-line method over the estimated useful lives of the respective assets, generally three to five years. Leasehold improvements are depreciated over the shorter of the useful lives of the assets or the related lease term. Repairs and maintenance costs are expensed as incurred. Property and equipment are reviewed for impairment whenever events or circumstances indicate their carrying value may not be recoverable. When such events or circumstances arise, an estimate of future undiscounted cash flows produced by the asset, or the appropriate grouping of assets, is compared to the asset’s carrying value to determine if an impairment exists. If the asset is determined to be impaired, the impairment loss is measured based on the excess of the carrying value over the assets fair value. Assets to be disposed of are reported at the lower of carrying value or net realizable value. There were no impairments of property and equipment during the years ended December 31, 2018, 2017 or 2016.
Goodwill	Goodwill Goodwill represents the excess of acquisition cost over the fair value of net tangible and identified net assets acquired. Goodwill and intangible assets that have indefinite lives are not be amortized, but rather tested for impairment annually, as of October 31, or more often if and when events or circumstances indicate that the carrying value may not be recoverable. The annual impairment test is completed using either: a qualitative “Step 0” assessment based on reviewing relevant events and circumstances; or a quantitative “Step 1” assessment, which determines the fair value of the reporting unit, using an income approach that discounts future cash flows based on the estimated future results of our reporting units and a market approach that compares market multiples of comparable companies to determine whether or not any impairment exists. The Step 1 of the goodwill impairment test, used to identify potential impairment, compares the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit exceeds its carrying amount, goodwill of the reporting unit is considered not impaired, thus the second step of the impairment test is unnecessary. If the carrying amount of a reporting unit exceeds its fair value, the second step of the goodwill impairment test shall be performed to measure the amount of impairment loss, if any in an amount equal to the excess. The loss recognized cannot exceed the carrying amount of goodwill. After a goodwill impairment loss is recognized, the adjusted carrying amount of goodwill shall be its new accounting basis. The annual evaluation of goodwill requires the use of estimates about future operating results to determine its estimated fair value. Changes in forecasted operations can materially affect these estimates, which could materially affect our results of operations. The estimate of fair value requires significant judgment and we base our fair value estimates on assumptions that we believe to be reasonable; but that are unpredictable and inherently uncertain, including: estimates of future growth rates, operating margins and assumptions about the overall economic climate as well as the competitive environment. There can be no assurance that our estimates and assumptions made for purposes of our goodwill testing as of the time of testing will prove to be accurate predictions of the future. If our assumptions regarding business plans, competitive environments or anticipated growth rates are not correct, we may be required to record goodwill impairment charges in future periods, whether in connection with our next annual impairment testing, or earlier, if an indicator of an impairment is present prior to our next annual evaluation. Goodwill is tested on an annual basis during the fourth quarter, or sooner if an indicator of impairment occurs. The company internally monitors business and market conditions for evidence of triggering events. There were no triggering events for any of the asset types during 2018, 2017 or 2016 or any material changes in business trend indicating the need for impairment loss. As of October 31, 2018, the Company performed a qualitative “Step 0” assessment and concluded no impairment for goodwill, was required. Hence, the first and second steps were not required to be performed for 2018. There were no impairments of goodwill during the years ended December 31, 2018, 2017 or 2016.
Intangible Assets	Intangible Assets Intangible assets are amortized on a straight-line basis over their estimated useful lives. The Company periodically reviews the estimated remaining useful life of our intangible assets and whether events or changes in circumstances warrant a revision to the remaining period of amortization. Periodically, the Company evaluates the recoverability of its long-lived assets including intangible assets, for possible impairment whenever events or circumstances indicate that the carrying amount of such assets may not be recoverable. Recoverability of these assets is measured by comparison of the carrying amount of each asset, or related asset group, to the future undiscounted cash flows the asset is expected to generate. If the undiscounted cash flows used in the test for recoverability are less than the carrying amount of these assets, the carrying amount of such assets is reduced to fair value. The Company did not record any impairments of long-lived assets including intangible assets for the years ended December 31, 2018, 2017 or 2016.
Software Development Costs	Software Development Costs Software development costs for products intended to be sold, leased or otherwise marketed are expensed as incurred until technological feasibility has been established, at which time such costs are capitalized until the product is available for general release to customers. Technological feasibility is established when a product design and working model have been completed and the completeness of the working model and its consistency with the product design have been confirmed by testing. To date, the establishment of technological feasibility of the Company’s products and general release of such software have substantially coincided. As a result, software development costs qualifying for capitalization have been insignificant. We have not capitalized any software development costs through December 31, 2018, all such costs have been recorded as research and development expenses, as incurred, in the consolidated statements of operations.
Comprehensive Income (Loss)	Comprehensive Income (Loss) The Company has not entered into transactions that require presentation as other comprehensive income (loss). Total comprehensive income (loss) is equal to net income (loss) for all periods presented.
Liquidity	Liquidity Our principal sources of liquidity have been the net proceeds we received through the sale of our common stock in our initial public offering, other equity financing, and cash generated from our operations. The Company had cash and cash equivalents of approximately $71.0 million at December 31, 2018, which we intend to use for working capital, operating expenses, and capital expenditures. We believe that our existing cash and cash equivalents, net operating cash flows, and revenues will be sufficient to satisfy our anticipated cash needs for working capital and capital expenditures for at least the next 12 months. Our future capital requirements and the adequacy of available funds will depend on many factors, including those set forth in Item 1A, Part I of this Annual Report on Form 10-K titled “Risk Factors.”
Revenue Recognition	Revenue Recognition ASC 606 Revenue consists of fees for perpetual and term licenses for the Company’s software products, post-contract customer support (referred to as maintenance), software as a service (“SaaS”) and professional services including training and other revenue. We typically recognize license revenue upon delivering the applicable license. The following describes the nature of the Company’s primary types of revenues and the revenue recognition policies as they pertain to the types of transactions the Company enters into with its customers. License Revenue License revenue includes perpetual license fees and term license fees which provide customers with the same functionality and differ mainly in the duration over which the customer benefits from the use of software. Both revenues from perpetual license and term license performance obligations are generally recognized upfront at the point in time when the software license has been delivered. All license transactions generally include an amount for first-year maintenance at no additional charge, which we recognize as subscription revenue over the term. Subscription Revenues Our subscription revenue consists of (i) fees for ongoing maintenance and support of our licensed solutions and (ii) subscription fees for access to, and related support for, our cloud-based solution. We typically invoice subscription fees in advance in annual installments and recognize subscription revenue ratably over the term of the applicable agreement. Subscription revenue include arrangements for software maintenance and technical support for our products and subscription services. Maintenance contracts generally have a term of one year and subscription revenue contracts usually have a term of one to three years which is initially deferred and recognized ratably over the life of the contract. Maintenance services agreements consist of fees for providing software updates on a when and if available basis and for providing technical support for software products for a specified term. We believe that our if available software updates and technical support each have the same pattern of transfer to the customer and are substantially the same. Therefore, we consider these to be a single distinct performance obligation. Therefore, revenue allocated to maintenance services are recognized ratably over the contract term beginning on the delivery date of each offering. Expenses related to maintenance and subscription are recognized as incurred. Unearned maintenance and subscription revenue are included in deferred revenue. The Company’s subscription services arrangements are generally non-cancelable and do not contain refund-type provisions. In instances that subscription services arrangements are deemed cancellable, which is rare, the Company will adjust the transaction price and period for revenue recognition accordingly to be reflective of the contract term in accordance with Accounting Standards Codification (“ASC”) 606, Revenue from Contracts with Customers (ASC 606) . Services and Other Revenues Services and other revenue consist primarily of fees from professional services provided to our customers and partners to configure and optimize the use of our solutions as well as training services related to the configuration and operation of our platform. The Company’s professional services contracts are either on a time and materials or “consumption based”, fixed fee or prepaid. Services revenues are generally recognized over time as the services are performed. Revenues for fixed price services and prepaids are generally recognized over time applying input methods to estimate progress to completion. Revenues for consumption-based services are generally recognized as the services are performed. Training revenues are recognized as the services are performed over time. Deferred Contract Acquisition Costs Under ASC 606, sales commissions paid to our sales force and the related employer payroll taxes, collectively “ deferred contract acquisition costs Contract Balances Deferred revenue We typically invoice our customers for subscription, maintenance and support fees in advance on either an annual, two- or three-year basis, with payment due at the start of the subscription term. For subscription fees, which includes subscription and maintenance, the timing of payments is typically upfront. Therefore, a contract liability or deferred revenue, is created because payment is made in advance of performance and these performance obligations are satisfied over time. Timing may differ between the satisfaction of performance obligations and the invoicing and collection of amounts related to our contracts with customers. Liabilities are recorded for amounts that are collected in advance of the satisfaction of performance obligations. Invoice amounts for non-cancelable services starting in future periods are included in contract assets and deferred revenue. The portion of deferred revenue that we anticipate will be recognized within twelve months is recorded as current deferred revenue, and the remaining portion is recorded as non-current deferred revenue in the consolidated balance sheets. Contract assets Contract assets relate to the Company’s rights to consideration for performance obligations satisfied but not billed at the reporting date on contracts. Contract assets are transferred to accounts receivable when the rights become unconditional. Contract assets are included in prepayments and other current assets and other non-current assets in the consolidated balance sheets. Revenue Recognition ASC 605 Our revenue recognition accounting policy for ASC 605 is shown below. We applied the revenue recognition accounting policy for ASC 605 to our disclosures in Note 3, which include amounts presented for 2018. Revenue consists of fees for perpetual licenses for the Company’s software products, post-contract customer support (referred to as maintenance), professional services, software as a service (“SaaS”) and other revenue. The Company recognizes revenue in accordance with the provisions of the Financial Accounting Standards Board (“FASB”) authoritative guidance on software revenue recognition and multiple element arrangements. Revenue is recognized when: • Persuasive evidence of an arrangement exists • Delivery has occurred, or services have been rendered • The Company’s price to the buyer is fixed or determinable, and • Collectability is probable The Company frequently enters into sales arrangements that contain multiple elements or deliverables. For arrangements that include both software and non-software elements, the Company allocates revenue to the software deliverables as a group and separable non-software deliverables as a group based on their relative selling prices. In such circumstances, the accounting principles establish a hierarchy to determine the selling price used for allocating revenue to the deliverables as follows: (i) Vendor Specific Objective Evidence (“VSOE”), (ii) third-party evidence of selling price (“TPE”) and (iii) the best estimate of the selling price (“ESP”). Cloud-based services, and professional services related to cloud-based services, are considered to be non-software elements in the Company’s arrangements. VSOE of fair value for each element is based on the Company’s standard rates charged for the product or service when such product or service is sold separately or based upon the price established by the Company’s pricing committee when that product or service is not yet being sold separately. The Company establishes VSOE for maintenance and professional services using a “bell-shaped curve” approach. When applying the “bell-shaped curve” approach the Company analyzes all maintenance renewal transactions over the past twelve months for that category of license and plots those data points on a bell-shaped curve to ensure that a high percentage of the data points are within an acceptable margin of the established VSOE rate. This analysis is performed quarterly on a rolling 12-month basis. When the Company is unable to establish a selling price for non-software arrangements using VSOE or TPE, the Company uses ESP in the allocation of arrangement consideration. The objective of ESP is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. The determination of ESP is made through consultation with and formal approval by the Company’s management, taking into consideration the Company’s go-to-market strategy, pricing factors, and historical transactions. The Company recognizes revenue for software arrangements that include undelivered elements using the residual method. Under the residual method, the fair value of the undelivered elements is deferred and recognized as such elements are delivered to the customer and the remaining portion of the agreement fee is recognized as license revenue upon delivery. The determination of fair value of each undelivered element in software arrangements is based on VSOE. If VSOE has not been established for certain undelivered elements in an agreement, revenue is deferred until those elements have been delivered or their VSOE has been determined. Revenue from maintenance and SaaS services is recognized ratably over the relevant contract period. Service revenue includes consulting and training. The Company has determined that consulting and training services are not essential to the functionality of the Company’s software and SaaS offerings, and consulting and training services are typically listed separately in arrangements, are optional, and sold separately. As a result, the Company has established VSOE or ESP for consulting and training services and they therefore qualify for separate accounting. In order to account for deliverables in a multiple-deliverable arrangement as separate unit of accounting, delivered elements must have standalone value. In determining whether professional services have standalone value, we consider the following factors for each professional services agreement: availability of the services from other vendors, the nature of the professional services, the timing of when the professional services contract was signed in comparison to the software or SaaS arrangement and the contractual dependence of the arrangement on the customer’s satisfaction with the professional services. Professional services sold as part of arrangements generally qualify for separate accounting. Consulting and training service revenue that qualifies for separate accounting is recognized as the services are performed using the proportional performance method for fixed fee consulting contracts, or when the right to the service expires. The majority of the Company’s consulting contracts are billed on a time and materials basis. Cost of Revenue Cost of revenue for licenses consists of amortization expense for developed technology acquired in business combinations and third-party royalties. Cost of subscription revenue consists primarily of employee costs of our customer support organization (including salaries, benefits, bonuses and stock-based compensation), contractor costs to supplement our staff levels, third-party cloud-hosting costs, allocated overhead and amortization expense for developed technology acquired in business combinations. Cost of revenue for services and other revenue consists primarily of personnel-related costs of our services and training departments, including salaries, commissions, benefits, bonuses and stock-based compensation, contractor costs to supplement our staff levels and allocated overhead.
Research and Development Expenses	Research and Development Expenses Research and development costs are expensed as incurred. Research and development expenses consist primarily of personnel-related costs for the design and development of our platform and technologies, contractor costs to supplement our staff levels, third-party web services, consulting services, and allocated overhead.
Advertising Expenses	Advertising Expenses The Company expenses advertising costs as incurred. Advertising expenses were approximately $7.3 million, $6.0 million and $4.2 million for the years ended December 31, 2018, 2017 and 2016, respectively, and are included in sales and marketing expense.
Stock-Based Compensation	Stock-Based Compensation The Company measures stock-based compensation expense for equity instruments granted to employees based upon the estimated fair value of the award at the date of grant and the estimated number of shares ultimately expected to vest. The Company estimates the fair value of stock options granted using the Black-Scholes option-pricing model, which requires us to estimate the expected term, fair value of common stock, expected volatility, expected forfeitures, risk-free interest rate, and dividend yield. We use the simplified method in developing an estimate of the expected term of the stock options, which is calculated as the average of the time to vesting and the contractual life of the options. The expected volatility is based upon the average historical volatility of comparable companies over a period approximately equal to the expected term of the awards. The risk-free interest rate is based on the average interest rate for U.S. Treasury instruments whose term is consistent with the expected term of the options. Stock-based compensation expense resulting from this valuation is recognized in the consolidated statements of operations on a straight-line basis over the period during which an employee provides the requisite service in exchange for the award. The Company analyzes the facts and circumstances of each equity instrument to determine if modification accounting is required. This analysis includes a review of factors that influence the probability of vesting. If circumstances arise that have changed the probability that an equity instrument will vest, or other factors have triggered a modification, the revised fair value is calculated, and additional stock-based compensation is recognized over the remaining service period of the modified instrument. The Company estimates potential forfeitures of stock grants and adjust recorded stock-based compensation expense accordingly. The estimate of forfeitures is based on historical experience and is adjusted over the requisite service period to the extent that actual forfeitures differ, or are expected to differ, from the prior estimates. Changes in estimated forfeitures will be recognized in the period of change and will impact the amount of stock-based compensation expense to be recognized in future periods. To date, the company has experienced minimal forfeitures. The Company also offers an Employee Stock Purchase Plan (ESPP) that allows permitted employees to purchase shares by authorizing payroll deductions from 1% to 15% of employee’s eligible compensation during the semi-annual offering period, with an annual cap of $25,000. Unless an employee has previously withdrawn from the offering, the payroll deductions will be used to purchase shares of common stock after the closing of the offering period at a price equal to 85% of the fair market value of the closing price of the shares at the opening or closing of the semi-annual offering period, whichever is lower. ESPP purchase rights have an expected volatility that is based on the historical volatility of the common stock of a collection of our peers in the market. The expected term represents the period of time the ESPP purchase rights are expected to be outstanding and approximates the offering period.
Foreign Currency Translation	Foreign Currency Translation The functional currency of our non-U.S. subsidiaries is the U.S. Dollar; therefore, all gains and losses on currency transactions are expensed as incurred.
Income Taxes	Income Taxes The Company uses the liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for expected future tax consequences of temporary differences between the carrying amounts and the tax bases of assets and liabilities. Valuation allowances are provided if it is more likely than not that some or all of the deferred tax assets will not be realized. The Company accounts for uncertainty of income taxes based on a “more-likely-than-not” threshold for the recognition and de-recognition of tax positions, which includes the accounting for interest and penalties relating to tax positions.
Net Income (Loss) Per Share	Net Income (Loss) Per Share Basic net income (loss) per share attributable to common stockholders is calculated by dividing the net income (loss) attributable to common stockholders for the period, defined as net income (loss) minus the accretion of dividends on redeemable convertible preferred stock, by the weighted-average number of shares of common stock outstanding during the period, without consideration of potentially dilutive securities. Diluted earnings per share includes the dilutive effect of common stock equivalents and is calculated using the weighted-average number of common stock and the common stock equivalents outstanding during the reporting period. Diluted earnings per share for the years ended December 31, 2018, 2017 and 2016 excludes certain common stock equivalents because their inclusion would be anti-dilutive. In 2017 and 2016, the Company was in a loss position, hence all common stock equivalents were excluded due to their anti-dilutive effect. Our incentive stock units have the right to receive non-forfeitable dividends on an equal basis with common stock and therefore are considered participating securities that must be included in the calculation of net income (loss) per share using the two-class method. Under the two-class method, basic and diluted net income (loss) per share is determined by calculating net income (loss) per share for common stock and participating securities based on the cash dividends paid and participation rights in undistributed earnings.
Recently Issued Accounting Standards Not Yet Adopted and Adopted	Recently Issued Accounting Standards Not Yet Adopted In February 2016, the FASB issued ASU 2016-02 and subsequent updates thereafter in ASU 2017-13, ASU 2018-10 and ASU 2018-11, Leases (collectively, Accounting Standards Codification 842 or ASC 842). This standard will be adopted using a modified retrospective transition method with certain practical expedients available for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Company currently expects that most of existing operating lease commitments will be subject to the new standard and will be recognized as operating lease liabilities and right-of-use (“ROU”) assets upon our adoption of ASC 842. The Company anticipates this standard will have a material impact on the consolidated balance sheets and will result in the recognition of ROU assets and lease liabilities for leases currently classified as operating leases that are not reported on the balance sheets. While the Company continues to assess the qualitative and quantitative impacts of adopting this standard, the most significant anticipated impact relates to physical office space leases. In June 2018, the FASB issued ASU 2018-07 , Compensation—Stock Compensation ( ASC 718): Improvements to Nonemployee Share-Based Payment Accounting (ASU 2018-07) , which simplifies the accounting for share-based payments to nonemployees by aligning it with the accounting for share-based payments to employees, with certain exceptions. ASU 2018-07 is effective for public companies for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. Early adoption is permitted, but no earlier than a company’s adoption date of ASC 606, Revenue from Contracts with Customers . The Company does not plan to early adopt, and therefore plans to adopt for the annual period beginning after December 15, 2018. The Company does not expect any impact upon adoption of ASU 2018-07 on the consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40) Recently Adopted Accounting Pronouncements In May 2017, the FASB issued ASU 2017-09, Compensation—Stock Compensation (ASC 718). In October 2016, the FASB issued ASU 2016-16, Income Taxes (ASC 740): Intra-Entity Transfers of Assets Other Than Inventory In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2014-09, Revenue from Contracts with Customers (ASC 606) Revenue Recognition Other Assets and Deferred Costs - Contracts with Customers As we adopted the revised standard, we updated our accounting policies, systems, internal controls and processes. Effective July 1, 2018, the Company lost its emerging growth company (“EGC”) status which accelerated the requirement of ASC 606 adoption. As a result, the Company adjusted its previously reported consolidated financial statements effective January 1, 2018. On December 31, 2018, we adopted ASC 606, with an effective date of January 1, 2018 using the modified retrospective transition method, which requires us to evaluate whether any cumulative adjustment is required to be recorded to retained earnings (or accumulated deficit) as a result of applying the provisions set forth under ASC 606 for any existing arrangements not yet completed as of January 1, 2018. We recorded a cumulative adjustment in the amount of approximately $21.8 million, net of tax, to retained earnings (accumulated deficit) as of the January 1, 2018 as a result of applying the modified retrospective transition method. In addition, it is important to note that under the modified retrospective transition method, our prior period results were not re-casted to reflect the revised recognition standard. The reported results for three-month periods ended March 31, 2018, June 30, 2018, September 30, 2018 and December 31, 2018 reflect the application of the revised standard as indicated by the “as adjusted”, or “ASC 606”, while the comparative periods for 2017 and prior periods have not been revised to reflect the adoption of the revised standard and remain “as reported”, or “ASC 605”, under the prior standard. Except for the changes discussed with respect to revenue recognition and the related customer acquisition costs, the impact of which is summarized in the tables below, we have consistently applied our accounting policies to all periods presented in our consolidated financial statements for year ended December 31, 2018. The adoption of the revised standard represents a change in accounting principle with the intent to align revenue recognition and provide financial statement readers with enhanced disclosures. In accordance with the revised standard, revenue is recognized when a customer has the right to obtain control of promised products and services. The amount of revenue recognized reflects the consideration to which the Company expects to be entitled to receive in exchange for these products and services. To achieve this core principle, the Company applies the following five steps: Identify the contract with a customer A contract with a customer exists when (i) the Company enters into an enforceable contract with a customer that defines each party’s rights regarding the products and services to be transferred and identifies the payment terms related to these products and services, (ii) the contract has commercial substance and, (iii) the Company determines that collection of substantially all consideration for products and services that are transferred is probable based on the customer’s intent and ability to pay the promised consideration. The Company applies judgment in determining the customer’s ability and intention to pay, which is based on a variety of factors including the customer’s historical payment experience or, in the case of a new customer, customer creditworthiness assessment and financial information at the outset of entering into the contract. Identify the performance obligations in the contract Performance obligations promised in a contract are identified based on the products and services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the products and services either on its own or together with other resources that are readily available from third parties or from the Company, and are distinct in the context of the contract, whereby the transfer of the products and services is separately identifiable from other promises in the contract. To the extent a contract includes multiple promised products and services, the Company applies judgment to determine whether promised products and services are capable of being distinct and distinct in the context of the contract. If these criteria are not met the promised products and services are accounted for as a combined performance obligation. The Company will evaluate any additional promises for goods and services that may occur in its contracts with customers in accordance with the framework in order to determine if these promises represent performance obligations. Determine the transaction price The transaction price is determined based on the consideration to which the Company will be entitled in exchange for transferring products and services to the customer. None of the Company's contracts as of January 1, 2018 contained a significant financing component. The Company considered whether there are any items within the contract that should be accounted for as variable consideration. The Company has elected to use the practical expedient for a service contract in which it bills a fixed amount for each hour of service provided, for time and materials services contracts as the amount corresponds with the value of the entity’s performance completed to date, which is needed to use this practical expedient. Because this practical expedient allows an entity to recognize revenue on the basis of invoicing, revenue is recognized by multiplying the price assigned to the goods or services delivered by the measure of progress (i.e., the quantities or units transferred). Therefore, the Company effectively bypasses the steps of determining the transaction price, allocating that transaction price to the performance obligations and determining when to recognize revenue when sold on a stand-alone basis. The Company has elected to utilize the practical expedient related to this performance obligation, if and when applicable. Fees related to time and materials service represents performance obligation with an undefined quantity of outputs but the contractual rate per output is fixed, the Company has enforceable rights and obligations and the consideration received is contingent upon the quantity completed, the total transaction price would be variable (related to this performance obligation) and the contract has a range of possible transaction prices, and the ultimate consideration will depend on the occurrence or non-occurrence of a future event even though the rate per unit is fixed. Determining the transaction price requires significant judgment, which is discussed in further detail below. The Company has determined that its contracts generally do not include a significant financing component. The primary purpose of the Company's invoicing terms is to provide customers with simplified and predictable ways of purchasing its solutions, not to receive financing from customers or to provide customers with financing. Examples of such terms include invoicing at the beginning of a subscription term with revenue recognized ratably over the contract period. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether transfer of control to customers has occurred. Allocate the transaction price to the performance obligations in the contract If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on a relative standalone selling price basis. The Company determines standalone selling price based on the price at which the performance obligation is sold separately. If the standalone selling price is not observable through past standalone transactions, the Company estimates the standalone selling price taking into account available information such as past transactions, market conditions and internally approved pricing guidelines related to the performance obligations. Recognize revenue when or as the Company satisfies a performance obligation The Company satisfies performance obligations either over time or at a point in time as discussed in further detail below. Revenue is recognized at the time the related performance obligation is satisfied by transferring the promised products and services to a customer. Upon adoption of the revised standard, the Company’s revenue recognition policy was modified in the following ways: The core principle of the standard is for companies to recognize revenue to depict the transfer of goods or services to customers in amounts that reflect the consideration (that is, payment) to which the company expects to be entitled in exchange for those goods or services. The most significant impacts of the revised standard to the Company relate to the timing of revenue recognition for arrangements involving term licenses and treatment of deferred contract acquisition costs. At contract inception, the Company assesses the products and services promised in its contracts with customers and identifies a performance obligation for each promise to transfer to the customer a product or service (or bundle of products or services) that is distinct – i.e., if a product or service is separately identifiable from other items in the bundled package and if a customer can benefit from it on its own or with other resources that are readily available to the customer. Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. The Company has contracts with customers that may have multiple performance obligations, including some or all of the following : software licenses, maintenance, subscriptions, professional services and or training. For these contracts, the Company accounts for individual performance obligations separately if they are distinct within the context of the contract by allocating the contract's total transaction price to each performance obligation in an amount based on the relative standalone selling price, or “ SSP ” , of each distinct good or service in the contract. In order to determine the SSP of its promised goods or services, the Company conducts an annual analysis to determine whether its goods or services have an observable SSP. In determining SSP, the Company requires that a substantial majority of the standalone selling prices for a goods or service that fall within a reasonably narrow pricing range. If the Company does not have a directly observable standalone selling price for a particular good or service, then the Company estimates a standalone selling price by our overall pricing objectives, taking into consideration market factors, pricing practices including historical discounting, historical standalone sales of similar products, customer demographics, geographic locations, and the number and types of users within our contracts. The determination of standalone selling price is made by the Company’s management. Selling prices are analyzed at least on an annual basis to identify if the Company has experienced significant changes in its selling prices. The Company allocates the transaction price to each performance obligation identified in the contract on a relative standalone selling price basis and recognizes revenue when or as it satisfies a performance obligation by transferring control of a product or service to a customer. Taxes collected from customers and remitted to governmental authorities are not included in revenue. The Company does not incur shipping and handling for its goods as they are generally delivered to a customer electronically. The Company notes that it does not believe that it currently has any rights to return that would result in a material impact to revenues. Other considerations The Company evaluates whether it is the principal (i.e., report revenues on a gross basis) or agent (i.e., report revenues on a net basis) for vendor reseller agreements. Generally, the Company reports revenues from these types of contracts on a gross basis, meaning the amounts billed to customers are recorded as revenues, and direct expenses incurred are recorded as cost of revenues. Where the Company is the principal, it first obtains control of the inputs to the specific good or service and directs their use to create the combined output. The Company's control is evidenced by its involvement in the integration of the good or service on its platform before it is transferred to its customers and is further supported by the Company being primarily responsible to its customers and having a level of discretion in establishing pricing. Practical expedients elected The Company elected to use the following practical expedients upon adoption of the revised standard: • To use an output method to measure progress toward completion of a performance obligation that is satisfied for a service contract in which it bills a fixed amount for each hour of service provided, with respect to time and material and consumption-based services contracts. • To include analysis of significant financing components only if the time between when the company transfers promised goods or services to a customer and when the customer pays for that good or service extends beyond one year. • To account for shipping and handling activities performed after control of a good has been transferred to the customer as a fulfillment cost and not a performance obligation. • To immediately recognize expense for the contract acquisition costs when the asset that would have resulted from capitalizing such costs would have been amortized in one year or less. • To exclude sales taxes and similar taxes from the measurement of transaction price
Reclassifications	Reclassifications Certain reclassifications to December 31, 2017 and 2016 year end balances were made to conform to the current period presentation in the consolidated balance sheets and consolidated statements of cash flows. These reclassifications include amortization of contract acquisition costs and prepayments and other current assets.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Cash, Cash Equivalents and Restricted Cash	The Company is required to maintain a small amount of restricted cash to guarantee rent payments in a foreign subsidiary as well as $6.0 million of cash collateral for an unconditional standby letter of credit related to the Company’s corporate headquarters lease As of December 31, 2018 2017 (In thousands) Cash and cash equivalents per balance sheet $ 70,964 $ 116,049 Restricted cash per balance sheet 6,272 78 Cash, cash equivalents and restricted cash per cash flow $ 77,236 $ 116,127
Summary of Consolidated Total Revenue by Geography	The following tables sets forth the Company’s consolidated total revenue by geography: Year Ended December 31, 2018 2018 2017 (1) 2016 (1) with adoption (ASC 606) without adoption (ASC 605) as previously reported (ASC 605) (In thousands) United States $ 171,497 $ 169,927 $ 134,676 $ 92,116 EMEA (2) 49,871 49,854 33,097 25,668 Rest of the World (2) 27,552 28,694 18,283 14,628 Total revenue $ 248,920 $ 248,475 $ 186,056 $ 132,412 (1) The comparative information for years prior to 2018 has not been adjusted to reflect the adoption of the revised standard and is reported on an ASC 605 basis. For additional information see Note 3. (2) No single country represented more than 10% of consolidated revenue

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2018
Schedule of Timing of Transfer of Control and Cash Flows	The following table presents the Company’s revenue by timing of revenue recognition to understand the risks of timing of transfer of control and cash flows: Year Ended December 31, 2018 License Subscription Services and other (in thousands) Timing of revenue recognition Revenue recognized at a point in time $ 105,000 $ — $ — Revenue recognized over time — 104,033 39,887 Total revenue $ 105,000 $ 104,033 $ 39,887
Summary of Activity Impacting Contract Balances	A summary of the activity impacting our contract balances during year ended December 31, 2018 is presented below (in thousands): Contract acquisition costs Balances at December 31, 2017 $ 5,949 Adoption of ASC 606 16,199 Additional deferred contract acquisition costs 1,439 Amortization of deferred contract acquisition costs (1,675 ) Balances at March 31, 2018 21,912 Additional deferred contract acquisition costs 3,096 Amortization of deferred contract acquisition costs (1,726 ) Balances at June 30, 2018 23,282 Additional deferred contract acquisition costs 3,345 Amortization of deferred contract acquisition costs (2,155 ) Balances at September 30, 2018 24,472 Additional deferred contract acquisition costs 5,768 Amortization of deferred contract acquisition costs (2,197 ) Balances at December 31, 2018 $ 28,043
Summary of Contract Balances With Deferred Revenue Current and Non-Current	Deferred revenue (current) Deferred revenue (non-current) Balances at December 31, 2017 $ 73,671 $ 9,454 Adoption of ASC 606 (9,508 ) 786 Increase (decrease), net 4,576 2,679 Balances at March 31, 2018 68,739 12,919 Increase (decrease), net 6,504 886 Balances at June 30, 2018 75,243 13,805 Increase (decrease), net 5,004 149 Balances at September 30, 2018 80,247 13,954 Increase (decrease), net 15,672 4,428 Balances at December 31, 2018 $ 95,919 $ 18,382
Accounting Standards Update 2014-09
Summary of Impact of Adoption 606 on Balance Sheet	These adjustments are as a result of the capitalization of customer acquisition costs, primarily deferred contract acquisition costs December 31, 2017 January 1, 2018 As reported (ASC 605) Impact of adoption As adjusted (ASC 606) Assets Current assets Cash and cash equivalents $ 116,049 $ — $ 116,049 Restricted cash 78 — 78 Accounts receivable 72,907 (355 ) 72,552 Prepayments and other current assets 10,013 5,848 15,861 Total current assets 199,047 5,493 204,540 Property and equipment, net 3,018 — 3,018 Deferred tax asset - non-current 264 (264 ) — Other non-current assets 3,542 13,232 16,774 Goodwill 219,377 — 219,377 Intangible assets, net 81,185 — 81,185 Total assets $ 506,433 $ 18,461 $ 524,894 Liabilities and stockholders’ equity Current liabilities Accounts payable $ 2,231 $ — $ 2,231 Accrued expenses and other liabilities 22,636 — 22,636 Income taxes payable 1,688 — 1,688 Deferred revenue - current 73,671 (9,508 ) 64,163 Total current liabilities 100,226 (9,508 ) 90,718 Deferred tax liability - non-current — 5,422 5,422 Long-term debt 68,329 — 68,329 Other long-term liabilities 27 — 27 Deferred revenue - non-current 9,454 786 10,240 Total liabilities 178,036 (3,300 ) 174,736 Commitments and contingencies Stockholders’ equity Common stock, $0.0001 par value 8 — 8 Preferred stock, $0.0001 par value, — — — Additional paid in capital 353,609 — 353,609 Accumulated deficit (25,220 ) 21,761 (3,459 ) Total stockholders' equity 328,397 21,761 350,158 Total liabilities and stockholders’ equity $ 506,433 $ 18,461 $ 524,894 Unaudited consolidated statement of financial position which reflect the adoption of ASC 606 are as follows by quarter (in thousands): March 31, 2018 June 30, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Assets Current assets Cash and cash equivalents $ 130,859 $ — $ 130,859 $ 81,809 $ — $ 81,809 Restricted cash 126 — 126 120 — 120 Accounts receivable 55,997 (697 ) 55,300 55,196 (689 ) 54,507 Prepayments and other current assets 9,094 7,369 16,463 9,784 7,545 17,329 Income taxes receivable — 1,164 1,164 — 5,841 5,841 Total current assets 196,076 7,836 203,912 146,909 12,697 159,606 Property and equipment, net 3,126 — 3,126 3,595 — 3,595 Deferred tax asset - non-current 264 (264 ) — 264 (264 ) — Other non-current assets 3,106 13,090 16,196 3,328 14,101 17,429 Goodwill 219,377 — 219,377 219,377 — 219,377 Intangible assets, net 78,979 — 78,979 76,773 — 76,773 Total assets 500,928 20,662 521,590 450,246 26,534 476,780 Liabilities and stockholders’ equity Current liabilities Accounts payable 1,872 — 1,872 2,894 — 2,894 Accrued expenses and other liabilities 12,012 (867 ) 11,145 14,106 (1,467 ) 12,639 Income taxes payable 1,918 (1,918 ) — 1,423 (1,423 ) — Deferred revenue - current 75,883 (7,144 ) 68,739 81,322 (6,079 ) 75,243 Total current liabilities 91,685 (9,929 ) 81,756 99,745 (8,969 ) 90,776 Deferred tax liability - non-current — 5,422 5,422 — 5,422 5,422 Long-term debt 68,321 — 68,321 9,640 — 9,640 Other long-term liabilities 65 — 65 51 — 51 Deferred revenue - non-current 13,175 (256 ) 12,919 13,817 (12 ) 13,805 Total liabilities 173,246 (4,763 ) 168,483 123,253 (3,559 ) 119,694 Commitments and contingencies Stockholders’ equity Common stock, $0.0001 par value 9 — 9 9 — 9 Preferred stock, $0.0001 par value — — — — — — Additional paid in capital 358,858 — 358,858 363,818 — 363,818 Accumulated deficit (31,185 ) 25,425 (5,760 ) (36,834 ) 30,093 (6,741 ) Total stockholders' equity 327,682 25,425 353,107 326,993 30,093 357,086 Total liabilities and stockholders’ equity $ 500,928 $ 20,662 $ 521,590 $ 450,246 $ 26,534 $ 476,780 September 30, 2018 December 31, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Presented without adoption (ASC 605) Impact of adoption As adjusted with adoption (ASC 606) Assets Current assets Cash and cash equivalents $ 83,315 $ — $ 83,315 $ 70,964 $ — $ 70,964 Restricted cash 121 — 121 6,272 — 6,272 Accounts receivable 71,316 (551 ) 70,765 102,188 (719 ) 101,469 Prepayments and other current assets 11,743 6,702 18,445 10,982 10,868 21,850 Income taxes receivable — 3,399 3,399 — — — Total current assets 166,495 9,550 176,045 190,406 10,149 200,555 Property and equipment, net 10,103 — 10,103 19,268 — 19,268 Deferred tax asset - non-current 264 (264 ) — 736 (736 ) — Other non-current assets 3,236 15,107 18,343 7,853 12,521 20,374 Goodwill 219,377 — 219,377 219,377 — 219,377 Intangible assets, net 74,567 — 74,567 74,860 — 74,860 Total assets 474,042 24,393 498,435 512,500 21,934 534,434 Liabilities and stockholders’ equity Current liabilities Accounts payable 3,036 — 3,036 4,636 — 4,636 Accrued expenses and other liabilities 18,623 (1,076 ) 17,547 21,886 (155 ) 21,731 Income taxes payable 2,099 (2,099 ) — 2,037 106 2,143 Deferred revenue - current 86,679 (6,432 ) 80,247 102,996 (7,077 ) 95,919 Current portion of long-term debt 9,669 — 9,669 — — — Total current liabilities 120,106 (9,607 ) 110,499 131,555 (7,126 ) 124,429 Deferred tax liability - non-current — 5,422 5,422 — 4,142 4,142 Long-term debt — — — — — — Other long-term liabilities 4,404 — 4,404 9,824 (36 ) 9,788 Deferred revenue - non-current 13,976 (22 ) 13,954 21,191 (2,809 ) 18,382 Total liabilities 138,486 (4,207 ) 134,279 162,570 (5,829 ) 156,741 Commitments and contingencies Stockholders’ equity Common stock, $0.0001 par value 9 — 9 9 — 9 Preferred stock, $0.0001 par value — — — — — — Additional paid in capital 369,079 — 369,079 377,473 — 377,473 (Accumulated deficit) retained earnings (33,532 ) 28,600 (4,932 ) (27,552 ) 27,763 211 Total stockholders' equity 335,556 28,600 364,156 349,930 27,763 377,693 Total liabilities and stockholders’ equity $ 474,042 $ 24,393 $ 498,435 $ 512,500 $ 21,934 $ 534,434
Summary of Adoption 606 on Consolidated Statement of Operations	Select unaudited consolidated statement of operations which reflect the adoption of ASC 606 are as follows (in thousands, except share and per share data): Three Month Ended March 31, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Revenue Licenses $ 16,987 $ (179 ) $ 16,808 Subscription 23,005 (500 ) 22,505 Services and other 9,722 (94 ) 9,628 Total revenue 49,714 (773 ) 48,941 Cost of revenue Licenses 1,138 — 1,138 Subscription 4,658 — 4,658 Services and other 6,974 — 6,974 Total cost of revenue 12,770 — 12,770 Gross profit 36,944 (773 ) 36,171 Operating expenses Research and development 9,762 — 9,762 General and administrative 7,657 — 7,657 Sales and marketing 23,815 (1,356 ) 22,459 Total operating expenses 41,234 (1,356 ) 39,878 Loss from operations (4,290 ) 583 (3,707 ) Other expense, net: Interest expense, net (1,178 ) — (1,178 ) Other, net (147 ) — (147 ) Total other expense, net (1,325 ) — (1,325 ) Loss before income taxes (5,615 ) 583 (5,032 ) Income tax (352 ) 3,082 2,730 Net loss $ (5,967 ) $ 3,665 $ (2,302 ) Net loss per share Basic $ (0.07 ) $ 0.04 $ (0.03 ) Diluted $ (0.07 ) $ 0.04 $ (0.03 ) Weighted average shares outstanding Basic 85,719,240 — 85,719,240 Diluted 85,719,240 — 85,719,240 Three Months Ended Six Months Ended June 30, 2018 June 30, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Revenue Licenses $ 19,128 $ 492 $ 19,620 $ 36,115 $ 313 $ 36,428 Subscription 25,051 (941 ) 24,110 48,056 (1,441 ) 46,615 Services and other 10,381 (455 ) 9,926 20,103 (549 ) 19,554 Total revenue 54,560 (904 ) 53,656 104,274 (1,677 ) 102,597 Cost of revenue Licenses 1,260 — 1,260 2,398 — 2,398 Subscription 4,919 — 4,919 9,577 — 9,577 Services and other 7,197 — 7,197 14,171 — 14,171 Total cost of revenue 13,376 — 13,376 26,146 — 26,146 Gross profit 41,184 (904 ) 40,280 78,128 (1,677 ) 76,451 Operating expenses Research and development 10,115 — 10,115 19,877 — 19,877 General and administrative 7,743 — 7,743 15,400 — 15,400 Sales and marketing 25,163 (1,389 ) 23,774 48,978 (2,745 ) 46,233 Total operating expenses 43,021 (1,389 ) 41,632 84,255 (2,745 ) 81,510 Loss from operations (1,837 ) 485 (1,352 ) (6,127 ) 1,068 (5,059 ) Other expense, net: Interest expense, net (2,800 ) — (2,800 ) (3,978 ) — (3,978 ) Other, net (569 ) — (569 ) (716 ) — (716 ) Total other expense, net (3,369 ) — (3,369 ) (4,694 ) — (4,694 ) Loss before income taxes (5,206 ) 485 (4,721 ) (10,821 ) 1,068 (9,753 ) Income tax (expense) benefit (441 ) 4,183 3,742 (793 ) 7,265 6,472 Net loss $ (5,647 ) $ 4,668 $ (979 ) $ (11,614 ) $ 8,333 $ (3,281 ) Net loss per share Basic $ (0.07 ) $ 0.06 $ (0.01 ) $ (0.14 ) $ 0.10 $ (0.04 ) Diluted $ (0.07 ) $ 0.06 $ (0.01 ) $ (0.14 ) $ 0.10 $ (0.04 ) Weighted average shares outstanding Basic 86,246,056 — 86,246,056 85,984,103 — 85,984,103 Diluted 86,246,056 — 86,246,056 85,984,103 — 85,984,103 Three Months Ended Nine Months Ended September 30, 2018 September 30, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Revenue Licenses $ 28,131 $ (108 ) $ 28,023 $ 64,246 $ 205 $ 64,451 Subscription 28,461 (545 ) 27,916 76,517 (1,986 ) 74,531 Services and other 9,827 (31 ) 9,796 29,930 (580 ) 29,350 Total revenue 66,419 (684 ) 65,735 170,693 (2,361 ) 168,332 Cost of revenue Licenses 1,145 — 1,145 3,543 — 3,543 Subscription 5,252 — 5,252 14,829 — 14,829 Services and other 7,617 — 7,617 21,788 — 21,788 Total cost of revenue 14,014 — 14,014 40,160 — 40,160 Gross profit 52,405 (684 ) 51,721 130,533 (2,361 ) 128,172 Operating expenses Research and development 11,474 — 11,474 31,351 — 31,351 General and administrative 8,763 — 8,763 24,163 — 24,163 Sales and marketing 27,658 (957 ) 26,701 76,636 (3,702 ) 72,934 Total operating expenses 47,895 (957 ) 46,938 132,150 (3,702 ) 128,448 Income (loss) from operations 4,510 273 4,783 (1,617 ) 1,341 (276 ) Other expense, net: Interest expense, net (202 ) — (202 ) (4,180 ) — (4,180 ) Other, net (388 ) — (388 ) (1,104 ) — (1,104 ) Total other expense, net (590 ) — (590 ) (5,284 ) — (5,284 ) Income (loss) before income taxes 3,920 273 4,193 (6,901 ) 1,341 (5,560 ) Income tax (expense) benefit (618 ) (1,767 ) (2,385 ) (1,411 ) 5,498 4,087 Net income (loss) $ 3,302 $ (1,494 ) $ 1,808 $ (8,312 ) $ 6,839 $ (1,473 ) Net income (loss) per share Basic $ 0.04 $ (0.02 ) $ 0.02 $ (0.10 ) $ 0.08 $ (0.02 ) Diluted $ 0.04 $ (0.02 ) $ 0.02 $ (0.10 ) $ 0.08 $ (0.02 ) Weighted average shares outstanding Basic 86,825,168 — 86,825,168 86,267,539 — 86,267,539 Diluted 90,355,212 — 90,355,212 86,267,539 — 86,267,539 Three Months Ended Year Ended December 31, 2018 December 31, 2018 Presented without adoption (ASC 605) Impact of adoption As adjusted with adoption (ASC 606) Presented without adoption (ASC 605) Impact of adoption As adjusted with adoption (ASC 606) Revenue Licenses $ 37,447 $ 3,102 $ 40,549 $ 101,693 $ 3,307 $ 105,000 Subscription 30,015 (513 ) 29,502 106,532 (2,499 ) 104,033 Services and other 10,320 217 10,537 40,250 (363 ) 39,887 Total revenue 77,782 2,806 80,588 248,475 445 248,920 Cost of revenue Licenses 1,091 — 1,091 4,634 — 4,634 Subscription 5,905 — 5,905 20,734 — 20,734 Services and other 7,514 — 7,514 29,302 — 29,302 Total cost of revenue 14,510 — 14,510 54,670 — 54,670 Gross profit 63,272 2,806 66,078 193,805 445 194,250 Operating expenses Research and development 11,803 — 11,803 43,154 — 43,154 General and administrative 10,618 — 10,618 34,781 — 34,781 Sales and marketing 33,623 (1,155 ) 32,468 110,259 (4,857 ) 105,402 Total operating expenses 56,044 (1,155 ) 54,889 188,194 (4,857 ) 183,337 Income from operations 7,228 3,961 11,189 5,611 5,302 10,913 Other expense, net: Interest expense, net (527 ) — (527 ) (4,707 ) — (4,707 ) Other, net (342 ) — (342 ) (1,446 ) — (1,446 ) Total other expense, net (869 ) — (869 ) (6,153 ) — (6,153 ) Income before income taxes 6,359 3,961 10,320 (542 ) 5,302 4,760 Income tax expense (benefit) (380 ) (4,797 ) (5,177 ) (1,791 ) 701 (1,090 ) Net income (loss) $ 5,979 $ (836 ) $ 5,143 $ (2,333 ) $ 6,003 $ 3,670 Net income per share Basic $ 0.07 $ (0.01 ) $ 0.06 $ (0.03 ) $ 0.07 $ 0.04 Diluted $ 0.07 $ (0.01 ) $ 0.06 $ (0.03 ) $ 0.07 $ 0.04 Weighted average shares outstanding Basic 87,171,161 — 87,171,161 86,495,301 — 86,495,301 Diluted 90,234,993 — 90,234,993 86,495,301 3,507,451 90,002,752
Summary of Adoption 606 on Consolidated Statement of Cash Flows	Adoption of the revised standard related to revenue recognition had no impact to financing or investing cash flows on the Company’s consolidated statements of cash flows. Selected unaudited consolidated statement of cash flows line items which reflect the adoption of ASC 606 are as follows (in thousands): Three Months Ended March 31, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Operating activities Net loss $ (5,967 ) $ 3,665 $ (2,302 ) Adjustments to reconcile net loss to net cash provided by operating activities: Depreciation and amortization expense 2,628 — 2,628 Amortization of loan origination fees 108 — 108 Amortization of contract acquisition costs 1,139 536 1,675 Gain on disposal of fixed assets (4 ) — (4 ) Stock-based compensation expense 5,139 — 5,139 Changes in operating assets and liabilities: Accounts receivable 16,910 342 17,252 Prepayments and other current assets (220 ) (2,057 ) (2,277 ) Other non-current assets 436 142 578 Accounts payable (358 ) — (358 ) Accrued expenses and other liabilities (10,651 ) (868 ) (11,519 ) Income taxes 230 (3,082 ) (2,852 ) Deferred revenue 5,932 1,322 7,254 Net cash provided by operating activities $ 15,322 $ — $ 15,322 Six Months Ended June 30, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Operating activities Net loss $ (11,614 ) $ 8,333 $ (3,281 ) Adjustments to reconcile net loss to net cash provided by operating activities: Depreciation and amortization expense 5,278 — 5,278 Amortization of loan origination fees 191 — 191 Amortization of contract acquisition costs 2,007 1,394 3,401 Loss on modification and partial extinguishment of debt 1,536 — 1,536 Gain on disposal of fixed assets (48 ) — (48 ) Stock-based compensation expense 9,255 — 9,255 Changes in operating assets and liabilities: Accounts receivable 17,711 333 18,044 Prepayments and other current assets (1,778 ) (3,091 ) (4,869 ) Other non-current assets 214 (869 ) (655 ) Accounts payable 663 — 663 Accrued expenses and other liabilities (8,557 ) (1,467 ) (10,024 ) Income taxes (264 ) (7,265 ) (7,529 ) Deferred revenue 12,013 2,632 14,645 Net cash provided by operating activities $ 26,607 $ — $ 26,607 Nine Months Ended September 30, 2018 As previously reported (ASC 605) Impact of adoption As adjusted (ASC 606) Operating activities Net loss $ (8,312 ) $ 6,839 $ (1,473 ) Adjustments to reconcile net loss to net cash provided by operating activities: Depreciation and amortization expense 7,977 — 7,977 Amortization of loan origination fees 220 — 220 Amortization of contract acquisition costs 3,001 2,555 5,556 Loss on modification and partial extinguishment of debt 1,536 — 1,536 Gain on disposal of fixed assets (36 ) — (36 ) Bad debt 299 — 299 Stock-based compensation expense 14,138 — 14,138 Changes in operating assets and liabilities: Accounts receivable 1,292 195 1,487 Prepayments and other current assets (4,731 ) (3,409 ) (8,140 ) Other non-current assets 306 (1,873 ) (1,567 ) Accounts payable 805 — 805 Accrued expenses and other liabilities (4,078 ) (1,077 ) (5,155 ) Income taxes 411 (5,498 ) (5,087 ) Deferred revenue 17,530 2,268 19,798 Net cash provided by operating activities $ 30,358 $ — $ 30,358 Year Ended December 31, 2018 Presented without adoption (ASC 605) Impact of adoption As adjusted with adoption (ASC 606) Operating activities Net income $ (2,333 ) $ 6,003 $ 3,670 Adjustments to reconcile net loss to net cash provided by operating activities: Depreciation and amortization expense 10,736 — 10,736 Amortization of loan origination fees 238 — 238 Amortization of contract acquisition costs 3,889 3,864 7,753 Loss on modification and extinguishment of debt 1,848 — 1,848 (Gain) loss on disposal of fixed assets (20 ) — (20 ) Bad debt expense 2,332 — 2,332 Stock-based compensation expense 18,975 — 18,975 Deferred taxes (471 ) (809 ) (1,280 ) Changes in operating assets and liabilities: Accounts receivable (31,613 ) 364 (31,249 ) Prepayments and other current assets (4,858 ) (8,884 ) (13,742 ) Other non-current assets (4,310 ) 711 (3,599 ) Accounts payable 2,406 — 2,406 Accrued expenses and other liabilities (690 ) (192 ) (882 ) Income taxes 349 106 455 Deferred revenue 41,062 (1,163 ) 39,899 Net cash provided by operating activities 37,540 — 37,540

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Cost and Amortization of Intangible Assets	Total cost and amortization of intangible assets comprised of the following: As of December 31, Weighted Average Useful Life 2018 2017 Intangible assets, net (In years) (In thousands) Customer lists 15 $ 42,500 $ 42,500 Developed technology 9.6 42,000 42,000 Trade names and trademarks 17 24,500 24,500 Order backlog 1.5 1,100 1,100 Non-competition agreements and other related items 4.9 3,310 810 Total intangible assets 113,410 110,910 Less: Accumulated amortization (38,550 ) (29,725 ) Total intangible assets, net $ 74,860 $ 81,185
Summary of Amortization Expense Included in Condensed Consolidated Statements of Operations	Amortization expense is included in the consolidated statements of operations for each of the years ended December 31, 2018, 2017 and 2016, respectively, as follows: Year Ended December 31, 2018 2017 2016 (In thousands) Cost of revenue - licenses $ 4,032 $ 4,032 $ 4,032 Cost of revenue - subscription 384 384 384 Research and development 136 149 162 General and administrative — — 100 Sales and marketing 4,273 4,276 4,414 Total amortization of intangibles $ 8,825 $ 8,841 $ 9,092
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The total estimated future amortization expense of these intangible assets as of December 31, 2018 is as follows: Year ending December 31, (In thousands) 2019 $ 9,325 2020 9,262 2021 9,189 2022 8,861 2023 8,475 Thereafter 29,748 Total amortization expense $ 74,860

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments	Future minimum annual lease payments under these non-cancelable operating leases and contractual commitments, including hosting service agreements, as of December 31, 2018 are as follows (in thousands): Year ending December 31, Operating leases Contractual commitments 2019 $ 3,112 $ 6,006 2020 4,454 2,577 2021 4,997 130 2022 4,921 — 2023 4,552 — Thereafter 27,575 — Total minimum lease payments $ 49,611 $ 8,713

Stock Option Plans and Stock-_2

Stock Option Plans and Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Summary of Fair Value of Stock Options Estimated by Using Weighted Average Assumptions	The fair value for the Company’s stock options and ESPP shares granted during the years ended December 31, 2018, 2017 and 2016 was determined using a Black Scholes option-pricing model with the following assumptions: Time Based Performance Based Stock Options December 31, 2018 December 31, 2017 December 31, 2016 December 31, 2017 December 31, 2016 Expected dividend rate 0% 0% 0% 0% 0% Expected volatility 40.0% - 46.0% 40.9% - 49.0% 49.0% 40.9% - 49.0% 49.0% Risk-free interest rate 2.63% - 2.97% 1.96% - 2.18% 1.31% - 2.24% 1.96% - 2.18% 1.27% - 2.16% Expected term (in years) 6.25 6.25 5.50 - 6.25 5.50 - 6.29 5.75 - 6.4 ESPP Expected dividend rate 0% NA NA NA NA Expected volatility 40.0% - 46.0% NA NA NA NA Risk-free interest rate 2.00% - 2.56% NA NA NA NA Expected term (in years) 0.50 NA NA NA NA
Summary of Restricted Stock Unit Activity	The following provides a summary of the restricted stock unit activity for the Company for the years ended December 31, 2018 and 2017: Number of Shares Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value (In thousands) Weighted Average Grant Date Fair Value Balances at December 31, 2016 — $ — Granted 897,284 $ 12.18 Vested — — Forfeited — — Balances at December 31, 2017 897,284 9.9 $ 186 $ 12.18 Units expected to vest at December 31, 2017 897,284 9.9 $ 186 $ 12.18 Balances at December 31, 2017 897,284 9.9 $ 186 $ 12.18 Granted 576,798 $ 19.30 Vested (270,884 ) $ 12.61 Forfeited (55,195 ) $ 17.58 Balances at December 31, 2018 1,148,003 1.8 $ 26,967 $ 15.40 Units expected to vest at December 31, 2018 1,148,003 1.8 $ 26,967 $ 15.40
Summary of Stock-Based Compensation Expense By Underlying Equity Instrument	A summary of the Company’s stock-based compensation expense, which includes stock options, restricted stock units, employee stock purchase plan and incentive units, recognized is presented below: Year Ended December 31, 2018 2017 2016 (In thousands) Stock options $ 3,943 $ 1,011 $ 508 Incentive units 8,582 3,185 60 RSUs 5,352 318 — ESPP 1,098 — — Total stock-based compensation expense $ 18,975 $ 4,514 $ 568
Summary of Stock-Based Compensation Expense	A summary of the Company’s stock-based compensation expense as recognized on the consolidated statements of operations is presented below: Year Ended December 31, 2018 2017 2016 (In thousands) Cost of revenue - subscription $ 945 $ 133 $ 34 Cost of revenue - services and other 1,504 458 63 Research and development 3,026 658 118 General and administrative 7,798 2,062 96 Sales and marketing 5,702 1,203 257 Total stock-based compensation expense $ 18,975 $ 4,514 $ 568
Incentive Unit Plan
Summary of Non-vested Stock Options	A summary of the Company’s non-vested incentive unit activity as of December 31, 2018, changes during the year ended December 31, 2018, 2017 and 2016 are presented below: Number of Shares Weighted- average exercise price (In thousands) (per share) Non-vested at December 31, 2015 5,526 $ 0.0517 Granted (1,677 ) $ 0.0517 Vested 7 $ 0.0517 Forfeited (20 ) $ 0.0517 Other (1) 291 $ 0.0517 Non-vested at December 31, 2016 4,127 $ 0.0517 Vested (1,846 ) $ 0.0517 Forfeited (39 ) $ 0.0517 Non-vested at December 31, 2017 2,242 $ 0.0517 Vested (1,503 ) $ 0.0517 Forfeited (16 ) $ 0.0517 Non-vested at December 31, 2018 723 $ 0.0517
Time Based
Summary of Stock Option Activity	The following table summarizes activity for time-based stock options during the years ended December 31, 2018, 2017 and 2016: Number of Options Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value Balances at December 31, 2015 1,326,449 $ 2.38 9.7 Granted 419,839 $ 1.69 Exercised (6,568 ) $ 1.77 Forfeited (117,602 ) $ 2.31 Balances at December 31, 2016 1,622,118 $ 2.21 8.9 $ 1,546,599 Options vested and expected to vest at December 31, 2016 1,622,118 $ 2.21 8.9 $ 1,546,599 Options vested and exercisable at December 31, 2016 416,265 $ 2.36 8.7 $ 340,334 Balances at December 31, 2016 1,622,118 $ 2.21 8.9 $ 1,546,599 Granted 1,592,370 $ 9.54 Conversion of performance to time based 591,892 $ 2.53 Exercised (152,330 ) $ 2.22 Forfeited (153,975 ) $ 2.21 Balances at December 31, 2017 3,500,075 $ 5.43 8.8 $ 31,784,488 Options vested and expected to vest at December 31, 2017 3,500,075 $ 5.43 8.8 $ 31,784,488 Options vested and exercisable at December 31, 2017 926,614 $ 2.28 7.9 $ 11,324,729 Balances at December 31, 2017 3,500,075 $ 5.43 8.8 $ 31,784,488 Granted 82,549 $ 23.17 Exercised (637,188 ) $ 2.84 Forfeited (128,110 ) $ 3.20 Balances at December 31, 2018 2,817,326 $ 6.64 8.0 $ 47,589,066 Options vested and expected to vest at December 31, 2018 2,817,326 $ 6.64 8.0 $ 47,589,066 Options vested and exercisable at December 31, 2018 1,095,211 $ 4.72 7.4 $ 20,557,640
Summary of Non-vested Stock Options	The following table summarizes the status of the Company’s non-vested time-based vesting stock options for the years ended December 31, 2018, 2017 and 2016: Number of Shares Weighted Average Grant Date Fair Value Non-vested at December 31, 2015 1,315,668 $ 1.15 Granted 401,094 $ 0.81 Vested (382,364 ) $ 1.16 Forfeited (117,602 ) $ 1.12 Non-vested at December 31, 2016 1,216,796 $ 1.05 Granted 1,592,370 $ 4.13 Conversion of vested performance to time based 322,988 $ 11.95 Vested (437,829 ) $ 1.04 Forfeited (111,076 ) $ 1.07 Non-vested at December 31, 2017 2,583,249 $ 4.32 Granted 82,549 $ 10.35 Vested (816,454 ) $ 2.99 Forfeited (121,728 ) $ 2.32 Non-vested at December 31, 2018 1,727,616 $ 5.47
Performance Shares
Summary of Stock Option Activity	The following table summarizes activity of performance vesting stock options for the years ended December 31, 2017 and 2016. There was no activity of performance vesting stock options for the year ended December 31, 2018 as all performance vesting options were modified to become service-based vesting stock options during the fourth quarter of 2017. Number of Options Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value Balances at December 31, 2015 322,846 $ 2.32 9.7 Options vested and expected to vest at December 31, 2015 322,846 $ 2.32 9.7 Options vested and exercisable at December 31, 2015 33,613 $ 2.33 9.5 Balances at December 31, 2015 322,846 $ 2.32 9.7 Granted 101,427 $ 1.77 Exercised (4,000 ) $ 1.36 $ 1,942 Forfeited (7,500 ) $ 2.42 Balances at December 31, 2016 412,773 $ 2.19 8.9 $ 401,616 Options vested and expected to vest at December 31, 2016 412,773 $ 2.19 8.9 $ 401,616 Options vested and exercisable at December 31, 2016 142,391 $ 2.22 8.8 $ 134,871 Balances at December 31, 2016 412,773 $ 2.19 8.9 $ 401,616 Granted 187,469 $ 3.27 Exercised (8,350 ) $ 2.38 $ 101,178 Conversion of shares (591,892 ) $ 2.53 8.5 Options vested and expected to vest at December 31, 2017 — $ — — $ — Options vested and exercisable at December 31, 2017 — $ — — $ —
Summary of Non-vested Performance Vesting Stock Options	A summary of the status of the Company’s non-vested performance vesting stock options as of December 31, 2017 and 2016, and changes during the year ended December 31, 2017 and 2016 are presented below. There was no activity of performance non-vested stock options for the year ended December 31, 2018 as all performance non-vested options were modified to become service-based vesting stock options during the fourth quarter of 2017. Number of Shares Weighted Average Grant Date Fair Value Non-vested at December 31, 2015 289,233 $ 1.11 Granted 101,427 $ 0.84 Vested (106,903 ) $ 0.99 Forfeited (6,563 ) $ 1.18 Non-vested at December 31, 2016 277,194 $ 1.01 Granted 187,469 $ 1.55 Vested (141,675 ) $ 1.54 Conversion of non-vested performance to time-based (322,988 ) $ 11.95 Non-vested at December 31, 2017 — $ —

Balance Sheet Related Items (Ta

Balance Sheet Related Items (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Text Block Supplement [Abstract]
Schedule of Cost and Accumulated Depreciation of Property and Equipment	The cost and accumulated depreciation of property and equipment are as follows: As of December 31, 2018 2017 (In thousands) Property and equipment, net Computer equipment $ 6,968 $ 4,559 Buildout in progress 15,295 — Other assets 1,218 833 Total property and equipment 23,481 5,392 Less: accumulated depreciation (4,213 ) (2,374 ) Total property and equipment, net $ 19,268 $ 3,018
Schedule of Accrued Expenses	Accrued expenses consisted of the following: As of December 31, 2018 2017 (In thousands) Commissions $ 7,731 $ 8,559 Bonus 4,829 5,063 Payroll and related benefits 2,209 2,640 Partner and customer programs 1,538 1,234 Sales and other taxes 2,798 1,373 Other 2,626 3,767 Total $ 21,731 $ 22,636

Prepayments and Other Assets (T

Prepayments and Other Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Prepaid Expense And Other Assets Current [Abstract]
Schedule of Prepayments and Other Current Assets	Prepayments and other current assets consisted of the following: As of December 31, 2018 2017 (In thousands) Deferred contract acquisition costs $ 8,392 $ 2,931 Prepaid expenses 7,159 4,376 Contract assets 2,464 — Other 3,835 2,706 Total $ 21,850 $ 10,013
Schedule of Other Non-current Assets	Other non-current assets consisted of the following: As of December 31, 2018 2017 (In thousands) Deferred contract acquisition costs $ 19,651 $ 3,018 Prepaid expenses 276 192 Contract assets 84 — Other 363 332 Total $ 20,374 $ 3,542

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Summary of Consolidated Income (Loss) Before Provision for Income Taxes	The following table presents consolidated income (loss) before income taxes as follows: Year Ended December 31, 2018 2017 2016 (In thousands) Domestic $ 6,951 $ (2,780 ) $ (2,435 ) Foreign (2,191 ) (2,519 ) (2,723 ) Total income (loss) before income taxes $ 4,760 $ (5,299 ) $ (5,158 )
Summary of Provision (Benefit) for Income Taxes	The provision (benefit) for income taxes consisted of: Year Ended December 31, 2018 2017 2016 (In thousands) Current Federal $ — $ 293 $ — State 630 189 21 Foreign 1,740 1,997 531 Total current 2,370 2,479 552 Deferred Federal (699 ) (293 ) (1,315 ) State (581 ) 202 (118 ) Foreign — (95 ) (1,104 ) Total deferred (1,280 ) (186 ) (2,537 ) Provision (benefit) $ 1,090 $ 2,293 $ (1,985 )
Net Tax Effects of Temporary Differences between the Carrying Amount of Significant Components of Deferred Tax Assets and Deferred Tax Liabilities	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred taxes are as follows: As of December 31, 2018 2017 (In thousands) Deferred tax assets: Research and development and other credits $ 4,461 $ 6,187 Net operating loss carryforward 8,147 14,795 Charitable contributions — — Deferred revenue 4,747 1,355 Stock compensation 1,046 125 Accrued expense 1,182 1,323 Depreciable and amortizable assets 54 29 Other 95 228 Total deferred tax assets 19,732 24,042 Deferred tax liabilities: Prepaid expenses (5,889 ) (1,249 ) Intangibles (15,280 ) (17,232 ) Total deferred tax asset (liability), net (1,437 ) 5,561 Less valuation allowance for deferred tax assets (2,705 ) (5,297 ) Net deferred tax assets (liabilities) $ (4,142 ) $ 264
Difference between Federal Income Tax Rate and Effective Income Tax Rate	The following table reconciles the Company’s effective tax rate to the federal statutory tax rate: Year Ended December 31, 2018 2017 2016 U.S. federal taxes at statutory rate 21.0 % 34.0 % 34.0 % Foreign tax rate differentials 16.7 (9.1 ) (11.8 ) Research and development credit (26.2 ) 17.8 18.2 Foreign tax credit 0.0 18.3 4.7 Amended federal return due to law change (18.8 ) 0.0 0.0 Stock options (0.1 ) (23.6 ) (3.8 ) Permanent differences and other 3.8 (14.4 ) (7.8 ) State taxes, net of federal benefit 9.6 (4.0 ) (0.1 ) Change in state rate 0.0 (1.9 ) 7.3 Change in valuation allowance due to operations 21.1 (58.4 ) (1.9 ) Other (4.2 ) (2.0 ) (0.3 ) Total income tax (benefit) expense 22.9 % (43.3 )% 38.5 %
Reconciliation of Unrecognized Tax Benefits	The reconciliation of unrecognized tax benefits at the beginning and end of the year is as follows (in thousands): Balance at December 31, 2015 $ 686 Additions based on tax positions related to prior year 197 Balance at December 31, 2016 883 Additions based on tax positions related to prior year 507 Additions based on tax positions related to current year 473 Balance at December 31, 2017 1,863 Reductions based on tax positions related to prior year (263 ) Additions based on tax positions related to current year 687 Balance at December 31, 2018 $ 2,287

Net Income (Loss) Per Share A_2

Net Income (Loss) Per Share Attributable to Common Stockholders (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Schedule of Calculation of Basic and Diluted Net Income (Loss) Per Share	The following table sets forth the calculation of basic and diluted net income (loss) per share during the periods presented: Year Ended December 31, 2018 2018 2017 2016 with adoption (ASC 606) without adoption (ASC 605) (as previously reported (ASC 605) (In thousands, except share data) Numerator: Net income (loss) $ 3,670 $ (2,333 ) $ (7,592 ) $ (3,173 ) Deemed dividends to preferred stockholders — — (21,129 ) (23,618 ) Earnings allocated to participating securities (29 ) (29 ) — — Net income (loss) available to common stockholders $ 3,641 $ (2,362 ) $ (28,721 ) $ (26,791 ) Denominator Weighted average shares outstanding Basic 86,495,301 86,495,301 52,339,804 45,933,218 Diluted 90,002,752 86,495,301 52,339,804 45,933,218 Net income (loss) attributable to common stockholders per share Basic $ 0.04 $ (0.03 ) $ (0.55 ) $ (0.58 ) Diluted $ 0.04 $ (0.03 ) $ (0.55 ) $ (0.58 )
Weighted Average Outstanding Shares of Common Stock Equivalents Excluded from the Computation of the Diluted Net Loss per Share	(1) The comparative information for years prior to 2018 has not been adjusted to reflect the adoption of the revised standard and is reported on an ASC 605 basis. The following weighted average outstanding shares of common stock equivalents were excluded from the computation of the diluted net income (loss) per share attributable to common stockholders for the periods presented because their effect would have been anti-dilutive, and the convertible preferred stock is not included in these calculations as it is contingently convertible based upon a future event (see Note 9): Year Ended December 31, 2018 2017 2016 Stock options to purchase common stock 35,531 2,402,225 1,799,632 RSUs issued and outstanding 12,838 105,404 — Non-vested incentive units — 2,915,228 4,931,760 Total 48,369 5,422,857 6,731,392

Geographic Information and Ma_2

Geographic Information and Major Customers (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Geographic information and major customers	The following are a summary of consolidated revenues within geographic areas: Year Ended December 31, 2018 2018 2017 2016 with adoption (ASC 606) without adoption (ASC 605) as previously reported (ASC 605) (In thousands) United States $ 171,497 $ 169,927 $ 134,676 $ 92,116 EMEA (1) 49,871 49,854 33,097 25,668 Rest of the World (1) 27,552 28,694 18,283 14,628 Total revenue $ 248,920 $ 248,475 $ 186,056 $ 132,412 (1) No single country represented more than 10% of our consolidated revenue.

Organization and Description _2

Organization and Description of Business - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Date of incorporation	Aug. 8, 2014
State of incorporation	Delaware

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details)	Oct. 31, 2018USD ($)	Nov. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)Segment	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Jan. 01, 2018USD ($)	Jun. 28, 2017USD ($)	Aug. 31, 2016USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | Segment				1
Line of credit or long-term debt				$ 0						$ 167,500,000	$ 120,000,000
Bad debt expense				2,332,000	$ 0	$ 0
Impairment of goodwill	$ 0			0	0	0
Impairment of long-lived assets including intangible assets				0	0	0
Capitalized software and development costs				0
Cash and cash equivalents			$ 83,315,000	70,964,000	116,049,000		$ 81,809,000	$ 130,859,000	$ 116,049,000
Impairment of deferred contract acquisition costs				$ 0	0	0
Captalized contract costs, expected period of benefit				5 years
Advertising expenses				$ 7,300,000	6,000,000	4,200,000
Cumulative adjustment to retained earnings, net of tax									21,800,000
Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Bad debt expense			$ 299,000	2,332,000
Cumulative adjustment to retained earnings, net of tax				21,761,000					$ 21,800,000
Employee Stock Purchase Plan
Summary Of Significant Accounting Policies [Line Items]
Maximum stock value of shares purchased by employees		$ 25,000		$ 25,000
Percentage of closing price of shares used to purchase shares		85.00%		85.00%
Property and Equipment
Summary Of Significant Accounting Policies [Line Items]
Impairment of property and equipment				$ 0	$ 0	$ 0
Minimum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, useful life				3 years
Minimum | Employee Stock Purchase Plan
Summary Of Significant Accounting Policies [Line Items]
Percentage of employee compensation for employee payroll deduction		1.00%		1.00%
Maximum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, useful life				5 years
Maximum | Employee Stock Purchase Plan
Summary Of Significant Accounting Policies [Line Items]
Percentage of employee compensation for employee payroll deduction		15.00%		15.00%
Credit Concentration Risk | Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage				11.00%	10.00%
Credit Concentration Risk | Revenue
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage				10.00%	10.00%	10.00%
Credit Concentration Risk | Net Assets
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage				10.00%	10.00%	10.00%
Letter of Credit
Summary Of Significant Accounting Policies [Line Items]
Cash collateral				$ 6,000,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Summary of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Cash and cash equivalents	$ 70,964	$ 83,315	$ 81,809	$ 130,859	$ 116,049	$ 116,049
Restricted cash per balance sheet	6,272					78
Cash, cash equivalents and restricted cash per cash flow	$ 77,236					$ 116,127	$ 18,272	$ 14,949

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Summary of Consolidated Total Revenue by Geography (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
ASC 605
Summary of Significant Accounting Policies [Line Items]
Total revenue	$ 248,475	$ 186,056	$ 132,412
Accounting Standards Update 2014-09
Summary of Significant Accounting Policies [Line Items]
Total revenue	248,920
United States | ASC 605
Summary of Significant Accounting Policies [Line Items]
Total revenue	169,927	134,676	92,116
United States | Accounting Standards Update 2014-09
Summary of Significant Accounting Policies [Line Items]
Total revenue	171,497
EMEA | ASC 605
Summary of Significant Accounting Policies [Line Items]
Total revenue	49,854	33,097	25,668
EMEA | Accounting Standards Update 2014-09
Summary of Significant Accounting Policies [Line Items]
Total revenue	49,871
Rest of the World | ASC 605
Summary of Significant Accounting Policies [Line Items]
Total revenue	28,694	$ 18,283	$ 14,628
Rest of the World | Accounting Standards Update 2014-09
Summary of Significant Accounting Policies [Line Items]
Total revenue	$ 27,552

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Summary of Consolidated Total Revenue by Geography (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Credit Concentration Risk | Revenue
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Details) - USD ($)	Jan. 01, 2018	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2018	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue Recognition [Line Items]
Deferred contract or customer acquisition cost	$ 22,100,000	$ 28,043,000	$ 24,472,000	$ 23,282,000	$ 21,912,000	$ 23,282,000	$ 24,472,000	$ 28,043,000	$ 5,949,000
Contract assets		84,000						84,000
Decrease in accounts receivable								31,249,000	24,116,000	$ 17,245,000
Cumulative adjustment to retained earnings, net of tax	21,800,000
Revnue recognized that previously reported as deferred	75,000,000	15,672,000	5,004,000	6,504,000	4,576,000
Contract asset, reclassified to receivable								6,300,000
Impairment losses recognized on contract assets								0	$ 0	$ 0
Remaining performance obligation		165,100,000						165,100,000
Amortization of contract acquisition costs		2,197,000	$ 2,155,000	$ 1,726,000	1,675,000			7,800,000
Deferred Contract Costs Expected To Be Amortized Within Next 12 Months
Revenue Recognition [Line Items]
Deferred contract or customer acquisition cost		8,400,000						8,400,000
Accounting Standards Update 2014-09
Revenue Recognition [Line Items]
Deferred contract or customer acquisition cost	16,200,000
Contract assets	2,800,000
Decrease in accounts receivable	(400,000)				(17,252,000)	(18,044,000)	(1,487,000)	31,249,000
Decrease in short-term deferred revenues	9,500,000
Increase in long-term deferred revenues	800,000
Increase in deferred tax liabilities	5,700,000
Cumulative adjustment to retained earnings, net of tax	21,800,000	$ 21,761,000						21,761,000
Amortization of contract acquisition costs					$ 1,675,000	$ 3,401,000	$ 5,556,000	$ 7,753,000
Accounting Standards Update 2014-09 | Adjustments
Revenue Recognition [Line Items]
Deferred contract or customer acquisition cost	16,200,000
Accounting Standards Update 2014-09 | Prepayments and Other Current Assets
Revenue Recognition [Line Items]
Deferred contract or customer acquisition cost	3,200,000
Contract assets	2,600,000
Accounting Standards Update 2014-09 | Other Non-Current Assets
Revenue Recognition [Line Items]
Deferred contract or customer acquisition cost	13,000,000
Contract assets	$ 200,000

Revenue Recognition - Summary o

Revenue Recognition - Summary of Impact of Adoption 606 on Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 70,964	$ 83,315	$ 81,809	$ 130,859	$ 116,049	$ 116,049
Restricted cash	6,272	121	120	126	78	78
Accounts receivable	101,469	70,765	54,507	55,300	72,552	72,907
Prepayments and other current assets	21,850	18,445	17,329	16,463	15,861	10,013
Total current assets	200,555	176,045	159,606	203,912	204,540	199,047
Income taxes receivable		3,399	5,841	1,164
Property and equipment, net	19,268	10,103	3,595	3,126	3,018	3,018
Deferred tax asset - non-current						264
Other non-current assets	20,374	18,343	17,429	16,196	16,774	3,542
Goodwill	219,377	219,377	219,377	219,377	219,377	219,377
Intangible assets, net	74,860	74,567	76,773	78,979	81,185	81,185
Total assets	534,434	498,435	476,780	521,590	524,894	506,433
Current liabilities
Accounts payable	4,636	3,036	2,894	1,872	2,231	2,231
Accrued expenses and other liabilities	21,731	17,547	12,639	11,145	22,636	22,636
Income taxes payable	2,143				1,688	1,688
Deferred revenue - current	95,919	80,247	75,243	68,739	64,163	73,671
Current portion of long-term debt		9,669
Total current liabilities	124,429	110,499	90,776	81,756	90,718	100,226
Deferred tax liability - non-current	4,142	5,422	5,422	5,422	5,422
Long-term debt			9,640	68,321	68,329	68,329
Other long-term liabilities	9,788	4,404	51	65	27	27
Deferred revenue - non-current	18,382	13,954	13,805	12,919	10,240	9,454
Total liabilities	156,741	134,279	119,694	168,483	174,736	178,036
Commitments and contingencies (Note 6)
Stockholders’ equity
Common stock, $0.0001 par value	9	9	9	9	8	8
Preferred stock, $0.0001 par value
Additional paid in capital	377,473	369,079	363,818	358,858	353,609	353,609
Accumulated deficit	211	(4,932)	(6,741)	(5,760)	(3,459)	(25,220)
Total stockholders' equity	377,693	364,156	357,086	353,107	350,158	328,397	$ (13,884)	$ (11,859)
Total liabilities and stockholders’ equity	534,434	498,435	476,780	521,590	$ 524,894	506,433
Impact of Adoption
Current assets
Accounts receivable	(719)	(551)	(689)	(697)		(355)
Prepayments and other current assets	10,868	6,702	7,545	7,369		5,848
Total current assets	10,149	9,550	12,697	7,836		5,493
Income taxes receivable		3,399	5,841	1,164
Deferred tax asset - non-current	(736)	(264)	(264)	(264)		(264)
Other non-current assets	12,521	15,107	14,101	13,090		13,232
Total assets	21,934	24,393	26,534	20,662		18,461
Current liabilities
Accrued expenses and other liabilities	(155)	(1,076)	(1,467)	(867)
Income taxes payable	106	(2,099)	(1,423)	(1,918)
Deferred revenue - current	(7,077)	(6,432)	(6,079)	(7,144)		(9,508)
Total current liabilities	(7,126)	(9,607)	(8,969)	(9,929)		(9,508)
Deferred tax liability - non-current	4,142	5,422	5,422	5,422		5,422
Other long-term liabilities	(36)
Deferred revenue - non-current	(2,809)	(22)	(12)	(256)		786
Total liabilities	(5,829)	(4,207)	(3,559)	(4,763)		(3,300)
Commitments and contingencies (Note 6)
Stockholders’ equity
Preferred stock, $0.0001 par value
Accumulated deficit	27,763	28,600	30,093	25,425		21,761
Total stockholders' equity	27,763	28,600	30,093	25,425		21,761
Total liabilities and stockholders’ equity	21,934	24,393	26,534	20,662		18,461
ASC 605
Current assets
Cash and cash equivalents	70,964	83,315	81,809	130,859		116,049
Restricted cash	6,272	121	120	126		78
Accounts receivable	102,188	71,316	55,196	55,997		72,907
Prepayments and other current assets	10,982	11,743	9,784	9,094		10,013
Total current assets	190,406	166,495	146,909	196,076		199,047
Property and equipment, net	19,268	10,103	3,595	3,126		3,018
Deferred tax asset - non-current	736	264	264	264		264
Other non-current assets	7,853	3,236	3,328	3,106		3,542
Goodwill	219,377	219,377	219,377	219,377		219,377
Intangible assets, net	74,860	74,567	76,773	78,979		81,185
Total assets	512,500	474,042	450,246	500,928		506,433
Current liabilities
Accounts payable	4,636	3,036	2,894	1,872		2,231
Accrued expenses and other liabilities	21,886	18,623	14,106	12,012		22,636
Income taxes payable	2,037	2,099	1,423	1,918		1,688
Deferred revenue - current	102,996	86,679	81,322	75,883		73,671
Current portion of long-term debt		9,669
Total current liabilities	131,555	120,106	99,745	91,685		100,226
Long-term debt			9,640	68,321		68,329
Other long-term liabilities	9,824	4,404	51	65		27
Deferred revenue - non-current	21,191	13,976	13,817	13,175		9,454
Total liabilities	162,570	138,486	123,253	173,246		178,036
Commitments and contingencies (Note 6)
Stockholders’ equity
Common stock, $0.0001 par value	9	9	9	9		8
Preferred stock, $0.0001 par value
Additional paid in capital	377,473	369,079	363,818	358,858		353,609
Accumulated deficit	(27,552)	(33,532)	(36,834)	(31,185)		(25,220)
Total stockholders' equity	349,930	335,556	326,993	327,682		328,397
Total liabilities and stockholders’ equity	$ 512,500	$ 474,042	$ 450,246	$ 500,928		$ 506,433

Revenue Recognition - Summary_2

Revenue Recognition - Summary of Impact of Adoption 606 on Balance Sheet Parenthetical (Details) - $ / shares	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Nov. 30, 2017
Revenue Recognition [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001
Preferred stock, par value	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001

Revenue Recognition - Summary_3

Revenue Recognition - Summary of Adoption 606 on Consolidated Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2018	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue
Total revenue							$ 248,920	$ 186,056	$ 132,412
Cost of revenue
Total cost of revenue							54,670	44,590	37,038
Gross profit							194,250	141,466	95,374
Operating expenses
Research and development							43,154	33,331	24,358
General and administrative							34,781	17,678	9,680
Sales and marketing							105,402	80,514	58,607
Total operating expenses							183,337	131,523	92,645
Income from operations							10,913	9,943	2,729
Other expense, net:
Interest expense, net							(4,707)	(14,783)	(7,277)
Other, net							(1,446)	(459)	(610)
Total other expense, net							(6,153)	(15,242)	(7,887)
Income (loss) before income taxes							4,760	(5,299)	(5,158)
Income tax (expense) benefit							(1,090)	(2,293)	1,985
Net income (loss)							$ 3,670	$ (7,592)	$ (3,173)
Net income (loss) per share
Basic							$ 0.04	$ (0.55)	$ (0.58)
Diluted							$ 0.04	$ (0.55)	$ (0.58)
Weighted average shares outstanding
Basic							86,495,301	52,339,804	45,933,218
Diluted							90,002,752	52,339,804	45,933,218
As Reported (ASC 605)
Revenue
Total revenue	$ 77,782	$ 66,419	$ 54,560	$ 49,714	$ 104,274	$ 170,693	$ 248,475
Cost of revenue
Total cost of revenue	14,510	14,014	13,376	12,770	26,146	40,160	54,670
Gross profit	63,272	52,405	41,184	36,944	78,128	130,533	193,805
Operating expenses
Research and development	11,803	11,474	10,115	9,762	19,877	31,351	43,154
General and administrative	10,618	8,763	7,743	7,657	15,400	24,163	34,781
Sales and marketing	33,623	27,658	25,163	23,815	48,978	76,636	110,259
Total operating expenses	56,044	47,895	43,021	41,234	84,255	132,150	188,194
Income from operations	7,228	4,510	(1,837)	(4,290)	(6,127)	(1,617)	5,611
Other expense, net:
Interest expense, net	(527)	(202)	(2,800)	(1,178)	(3,978)	(4,180)	(4,707)
Other, net	(342)	(388)	(569)	(147)	(716)	(1,104)	(1,446)
Total other expense, net	(869)	(590)	(3,369)	(1,325)	(4,694)	(5,284)	(6,153)
Income (loss) before income taxes	6,359	3,920	(5,206)	(5,615)	(10,821)	(6,901)	(542)
Income tax (expense) benefit	(380)	(618)	(441)	(352)	(793)	(1,411)	(1,791)	$ (2,293)	$ 1,985
Net income (loss)	$ 5,979	$ 3,302	$ (5,647)	$ (5,967)	$ (11,614)	$ (8,312)	$ (2,333)
Net income (loss) per share
Basic	$ 0.07	$ 0.04	$ (0.07)	$ (0.07)	$ (0.14)	$ (0.10)	$ (0.03)
Diluted	$ 0.07	$ 0.04	$ (0.07)	$ (0.07)	$ (0.14)	$ (0.10)	$ (0.03)
Weighted average shares outstanding
Basic	87,171,161	86,825,168	86,246,056	85,719,240	85,984,103	86,267,539	86,495,301
Diluted	90,234,993	90,355,212	86,246,056	85,719,240	85,984,103	86,267,539	86,495,301
Accounting Standards Update 2014-09
Revenue
Total revenue	$ 80,588	$ 65,735	$ 53,656	$ 48,941	$ 102,597	$ 168,332	$ 248,920
Cost of revenue
Total cost of revenue	14,510	14,014	13,376	12,770	26,146	40,160	54,670
Gross profit	66,078	51,721	40,280	36,171	76,451	128,172	194,250
Operating expenses
Research and development	11,803	11,474	10,115	9,762	19,877	31,351	43,154
General and administrative	10,618	8,763	7,743	7,657	15,400	24,163	34,781
Sales and marketing	32,468	26,701	23,774	22,459	46,233	72,934	105,402
Total operating expenses	54,889	46,938	41,632	39,878	81,510	128,448	183,337
Income from operations	11,189	4,783	(1,352)	(3,707)	(5,059)	(276)	10,913
Other expense, net:
Interest expense, net	(527)	(202)	(2,800)	(1,178)	(3,978)	(4,180)	(4,707)
Other, net	(342)	(388)	(569)	(147)	(716)	(1,104)	(1,446)
Total other expense, net	(869)	(590)	(3,369)	(1,325)	(4,694)	(5,284)	(6,153)
Income (loss) before income taxes	10,320	4,193	(4,721)	(5,032)	(9,753)	(5,560)	4,760
Income tax (expense) benefit	(5,177)	(2,385)	3,742	2,730	6,472	4,087	(1,090)
Net income (loss)	$ 5,143	$ 1,808	$ (979)	$ (2,302)	$ (3,281)	$ (1,473)	$ 3,670
Net income (loss) per share
Basic	$ 0.06	$ 0.02	$ (0.01)	$ (0.03)	$ (0.04)	$ (0.02)	$ 0.04
Diluted	$ 0.06	$ 0.02	$ (0.01)	$ (0.03)	$ (0.04)	$ (0.02)	$ 0.04
Weighted average shares outstanding
Basic	87,171,161	86,825,168	86,246,056	85,719,240	85,984,103	86,267,539	86,495,301
Diluted	90,234,993	90,355,212	86,246,056	85,719,240	85,984,103	86,267,539	90,002,752
Accounting Standards Update 2014-09 | Impact of Adoption
Revenue
Total revenue	$ 2,806	$ (684)	$ (904)	$ (773)	$ (1,677)	$ (2,361)	$ 445
Cost of revenue
Gross profit	2,806	(684)	(904)	(773)	(1,677)	(2,361)	445
Operating expenses
Sales and marketing	(1,155)	(957)	(1,389)	(1,356)	(2,745)	(3,702)	(4,857)
Total operating expenses	(1,155)	(957)	(1,389)	(1,356)	(2,745)	(3,702)	(4,857)
Income from operations	3,961	273	485	583	1,068	1,341	5,302
Other expense, net:
Income (loss) before income taxes	3,961	273	485	583	1,068	1,341	5,302
Income tax (expense) benefit	(4,797)	(1,767)	4,183	3,082	7,265	5,498	701
Net income (loss)	$ (836)	$ (1,494)	$ 4,668	$ 3,665	$ 8,333	$ 6,839	$ 6,003
Net income (loss) per share
Basic	$ (0.01)	$ (0.02)	$ 0.06	$ 0.04	$ 0.10	$ 0.08	$ 0.07
Diluted	$ (0.01)	$ (0.02)	$ 0.06	$ 0.04	$ 0.10	$ 0.08	$ 0.07
Weighted average shares outstanding
Diluted							3,507,451
Licenses
Revenue
Total revenue							$ 105,000	79,209	54,395
Cost of revenue
Total cost of revenue							4,634	4,561	4,278
Licenses | As Reported (ASC 605)
Revenue
Total revenue	$ 37,447	$ 28,131	$ 19,128	$ 16,987	$ 36,115	$ 64,246	101,693
Cost of revenue
Total cost of revenue	1,091	1,145	1,260	1,138	2,398	3,543	4,634
Licenses | Accounting Standards Update 2014-09
Revenue
Total revenue	40,549	28,023	19,620	16,808	36,428	64,451	105,000
Cost of revenue
Total cost of revenue	1,091	1,145	1,260	1,138	2,398	3,543	4,634
Licenses | Accounting Standards Update 2014-09 | Impact of Adoption
Revenue
Total revenue	3,102	(108)	492	(179)	313	205	3,307
Subscription
Revenue
Total revenue							104,033	71,007	49,364
Cost of revenue
Total cost of revenue							20,734	16,406	13,051
Subscription | As Reported (ASC 605)
Revenue
Total revenue	30,015	28,461	25,051	23,005	48,056	76,517	106,532
Cost of revenue
Total cost of revenue	5,905	5,252	4,919	4,658	9,577	14,829	20,734
Subscription | Accounting Standards Update 2014-09
Revenue
Total revenue	29,502	27,916	24,110	22,505	46,615	74,531	104,033
Cost of revenue
Total cost of revenue	5,905	5,252	4,919	4,658	9,577	14,829	20,734
Subscription | Accounting Standards Update 2014-09 | Impact of Adoption
Revenue
Total revenue	(513)	(545)	(941)	(500)	(1,441)	(1,986)	(2,499)
Service and other
Revenue
Total revenue							39,887	35,840	28,653
Cost of revenue
Total cost of revenue							29,302	$ 23,623	$ 19,709
Service and other | As Reported (ASC 605)
Revenue
Total revenue	10,320	9,827	10,381	9,722	20,103	29,930	40,250
Cost of revenue
Total cost of revenue	7,514	7,617	7,197	6,974	14,171	21,788	29,302
Service and other | Accounting Standards Update 2014-09
Revenue
Total revenue	10,537	9,796	9,926	9,628	19,554	29,350	39,887
Cost of revenue
Total cost of revenue	7,514	7,617	7,197	6,974	14,171	21,788	29,302
Service and other | Accounting Standards Update 2014-09 | Impact of Adoption
Revenue
Total revenue	$ 217	$ (31)	$ (455)	$ (94)	$ (549)	$ (580)	$ (363)

Revenue Recognition - Summary_4

Revenue Recognition - Summary of Adoption 606 on Consolidated Statement of Cash Flows (Details) - USD ($)	Jan. 01, 2018	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2018	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities
Net Income (loss)								$ 3,670,000	$ (7,592,000)	$ (3,173,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization expense								10,736,000	10,220,000	9,982,000
Amortization of loan origination fees								238,000	746,000	749,000
Loss on modification and extinguishment of debt								1,848,000	1,702,000
Amortization of contract acquisition costs		$ 2,197,000	$ 2,155,000	$ 1,726,000	$ 1,675,000			7,800,000
(Gain) loss on disposal of fixed assets								(20,000)	(20,000)	5,000
Bad debt expense								2,332,000	0	0
Stock-based compensation expense								18,975,000	4,514,000	568,000
Deferred taxes								(1,280,000)	69,000	(2,537,000)
Changes in operating assets and liabilities:
Accounts receivable								(31,249,000)	(24,116,000)	(17,245,000)
Prepayments and other current assets								(13,742,000)	(5,182,000)	(4,060,000)
Other non-current assets								(3,599,000)	(2,453,000)	(857,000)
Accounts payable								2,406,000	1,443,000	(262,000)
Accrued expenses and other liabilities								(882,000)	10,882,000	1,712,000
Income taxes								455,000	614,000	161,000
Deferred revenue								39,899,000	28,021,000	20,216,000
Net cash provided by operating activities								37,540,000	21,856,000	6,540,000
As Reported (ASC 605)
Operating activities
Net Income (loss)		5,979,000	3,302,000	(5,647,000)	(5,967,000)	$ (11,614,000)	$ (8,312,000)	(2,333,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization expense					2,628,000	5,278,000	7,977,000	10,736,000
Amortization of loan origination fees					108,000	191,000	220,000	238,000
Loss on modification and extinguishment of debt						1,536,000	1,536,000	1,848,000
Amortization of contract acquisition costs					1,139,000	2,007,000	3,001,000	3,889,000
(Gain) loss on disposal of fixed assets					(4,000)	(48,000)	(36,000)	(20,000)
Bad debt expense							299,000	2,332,000
Stock-based compensation expense					5,139,000	9,255,000	14,138,000	18,975,000
Deferred taxes								(471,000)	$ (186,000)	$ (2,537,000)
Changes in operating assets and liabilities:
Accounts receivable					16,910,000	17,711,000	1,292,000	(31,613,000)
Prepayments and other current assets					(220,000)	(1,778,000)	(4,731,000)	(4,858,000)
Other non-current assets					436,000	214,000	306,000	(4,310,000)
Accounts payable					(358,000)	663,000	805,000	2,406,000
Accrued expenses and other liabilities					(10,651,000)	(8,557,000)	(4,078,000)	(690,000)
Income taxes					230,000	(264,000)	411,000	349,000
Deferred revenue					5,932,000	12,013,000	17,530,000	41,062,000
Net cash provided by operating activities					15,322,000	26,607,000	30,358,000	37,540,000
Accounting Standards Update 2014-09
Operating activities
Net Income (loss)		5,143,000	1,808,000	(979,000)	(2,302,000)	(3,281,000)	(1,473,000)	3,670,000
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization expense					2,628,000	5,278,000	7,977,000	10,736,000
Amortization of loan origination fees					108,000	191,000	220,000	238,000
Loss on modification and extinguishment of debt						1,536,000	1,536,000	1,848,000
Amortization of contract acquisition costs					1,675,000	3,401,000	5,556,000	7,753,000
(Gain) loss on disposal of fixed assets					(4,000)	(48,000)	(36,000)	(20,000)
Bad debt expense							299,000	2,332,000
Stock-based compensation expense					5,139,000	9,255,000	14,138,000	18,975,000
Deferred taxes								(1,280,000)
Changes in operating assets and liabilities:
Accounts receivable	$ 400,000				17,252,000	18,044,000	1,487,000	(31,249,000)
Prepayments and other current assets					(2,277,000)	(4,869,000)	(8,140,000)	(13,742,000)
Other non-current assets					578,000	(655,000)	(1,567,000)	(3,599,000)
Accounts payable					(358,000)	663,000	805,000	2,406,000
Accrued expenses and other liabilities					(11,519,000)	(10,024,000)	(5,155,000)	(882,000)
Income taxes					(2,852,000)	(7,529,000)	(5,087,000)	455,000
Deferred revenue					7,254,000	14,645,000	19,798,000	39,899,000
Net cash provided by operating activities					15,322,000	26,607,000	30,358,000	37,540,000
Accounting Standards Update 2014-09 | Presented Without Adoption (ASC 605)
Operating activities
Net Income (loss)		$ (836,000)	$ (1,494,000)	$ 4,668,000	3,665,000	8,333,000	6,839,000	6,003,000
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Amortization of contract acquisition costs					536,000	1,394,000	2,555,000	3,864,000
Deferred taxes								(809,000)
Changes in operating assets and liabilities:
Accounts receivable					342,000	333,000	195,000	364,000
Prepayments and other current assets					(2,057,000)	(3,091,000)	(3,409,000)	(8,884,000)
Other non-current assets					142,000	(869,000)	(1,873,000)	711,000
Accrued expenses and other liabilities					(868,000)	(1,467,000)	(1,077,000)	(192,000)
Income taxes					(3,082,000)	(7,265,000)	(5,498,000)	106,000
Deferred revenue					$ 1,322,000	$ 2,632,000	$ 2,268,000	$ (1,163,000)

Revenue Recognition - Schedule

Revenue Recognition - Schedule of Timing of Transfer of Control and Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation Of Revenue [Line Items]
Total revenue	$ 248,920	$ 186,056	$ 132,412
Licenses
Disaggregation Of Revenue [Line Items]
Total revenue	105,000	79,209	54,395
Subscription
Disaggregation Of Revenue [Line Items]
Total revenue	104,033	71,007	49,364
Service and other
Disaggregation Of Revenue [Line Items]
Total revenue	39,887	$ 35,840	$ 28,653
Revenue Recognized At a Point in Time | Licenses
Disaggregation Of Revenue [Line Items]
Total revenue	105,000
Revenue Recognized Over Time | Subscription
Disaggregation Of Revenue [Line Items]
Total revenue	104,033
Revenue Recognized Over Time | Service and other
Disaggregation Of Revenue [Line Items]
Total revenue	$ 39,887

Revenue Recognition - Summary_5

Revenue Recognition - Summary of Activity Impacting Contract Balances (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2018	Sep. 30, 2018	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Contract Acquisition Costs, Balances	$ 24,472	$ 23,282	$ 21,912	$ 5,949	$ 5,949	$ 5,949	$ 5,949
Adoption of ASC 606				16,199
Additional deferred contract acquisition costs	5,768	3,345	3,096	1,439
Amortization of deferred contract acquisition costs	(2,197)	(2,155)	(1,726)	(1,675)			(7,800)
Contract Acquisition Costs, Balances	$ 28,043	$ 24,472	$ 23,282	$ 21,912	$ 23,282	$ 24,472	$ 28,043

Revenue Recognition - Summary_6

Revenue Recognition - Summary of Contract Balances With Deferred Revenue Current and NonCurrent (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Revenue From Contract With Customer [Abstract]
Deferred revenue current, Balances	$ 73,671	$ 80,247	$ 75,243	$ 68,739	$ 73,671
Adoption of ASC 606					(9,508)
Increase (decrease), net	75,000	15,672	5,004	6,504	4,576
Deferred revenue current, Balances		95,919	80,247	75,243	68,739
Deferred revenue non-current, Balances	$ 9,454	13,954	13,805	12,919	9,454
Adoption of ASC 606					786
Increase (decrease), net		4,428	149	886	2,679
Deferred revenue non-current, Balances		$ 18,382	$ 13,954	$ 13,805	$ 12,919

Revenue Recognition - Additio_2

Revenue Recognition - Additional Information (Details1) $ in Millions	Dec. 31, 2018USD ($)
Disaggregation Of Revenue [Line Items]
Revenue expected to recognize	$ 165.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-01-01
Disaggregation Of Revenue [Line Items]
Revenue expected to recognize	$ 109.7
Remaining performance obligation, expected timing of Satisfaction, period	12 months

Goodwill - Additional Informati

Goodwill - Additional Information (Details) - USD ($)	Oct. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill		$ 219,377,000	$ 219,377,000		$ 219,377,000	$ 219,377,000	$ 219,377,000	$ 219,377,000
Goodwill, acquired during period		0	0
Impairment of goodwill	$ 0	$ 0	$ 0	$ 0

Intangible Assets - Schedule of

Intangible Assets - Schedule of Cost and Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 113,410	$ 110,910
Less: Accumulated amortization	(38,550)	(29,725)
Total intangible assets, net	$ 74,860	81,185
Customer Lists
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	15 years
Intangible assets, gross	$ 42,500	42,500
Developed Technology
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	9 years 7 months 6 days
Intangible assets, gross	$ 42,000	42,000
Trade Names and Trademarks
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	17 years
Intangible assets, gross	$ 24,500	24,500
Order Backlog
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	1 year 6 months
Intangible assets, gross	$ 1,100	1,100
Non-competition Agreements and Related Items
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	4 years 4 months 24 days
Intangible assets, gross	$ 3,310	$ 810

Intangible Assets - Additional

Intangible Assets - Additional Information (Details) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)		$ 0	$ 0	$ 0
Technology Patents
Finite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortized on straight line method	5 years
Finite-lived intangible assets, purchased from an unrelated third party	$ 2,500,000

Intangible Assets - Summary of

Intangible Assets - Summary of Amortization Expense Included in Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	$ 8,825	$ 8,841	$ 9,092
Cost of Revenue - Licenses
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	4,032	4,032	4,032
Cost of Revenue – Subscription
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	384	384	384
Research and Development
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	136	149	162
Sales and Marketing
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	$ 4,273	$ 4,276	4,414
General and Administrative Expense
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles			$ 100

Intangible Assets - Schedule _2

Intangible Assets - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
2019	$ 9,325
2020	9,262
2021	9,189
2022	8,861
2023	8,475
Thereafter	29,748
Total intangible assets, net	$ 74,860	$ 81,185

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Future Minimum Lease Payments Under Non-cancelable Operating Leases and Contractual Commitments Including Hosting Service Agreements (Details) $ in Thousands	Dec. 31, 2018USD ($)
Operating leases
2019	$ 3,112
2020	4,454
2021	4,997
2022	4,921
2023	4,552
Thereafter	27,575
Total minimum lease payments	49,611
Contractual commitments
2019	6,006
2020	2,577
2021	130
Total minimum lease payments	$ 8,713

Commitments and Contingencies_2

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Line Items]
Rent expense under all operating leases	$ 3.8	$ 2.9	$ 1.8
Accrued Liabilities
Commitments and Contingencies Disclosure [Line Items]
Deferred rent balance		$ 1.4
Other Long-term Liabilities
Commitments and Contingencies Disclosure [Line Items]
Deferred rent balance	$ 9.8

Line of Credit and Long-Term _2

Line of Credit and Long-Term Debt - Additional Information (Details) - USD ($)	Nov. 29, 2018	Jun. 29, 2018	Jun. 28, 2017	Aug. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Oct. 05, 2017
Line Of Credit Facility [Line Items]
Line of credit outstanding balance			$ 167,500,000	$ 120,000,000	$ 0
Line of credit facility, principal prepayment conditions				The agreement also required prepayments in the case of certain events including: asset sales in excess of $1 million, proceeds from an initial public offering (“IPO”), proceeds in excess of $1 million from an insurance settlement, or proceeds from a new debt agreement.
Minimum sales value of assets sold to trigger prepayment of debt				$ 1,000,000
Minimum proceeds from insurance settlement or new debt agreement to trigger prepayment of debt				$ 1,000,000
Proceeds from loan used to fund preferred stock dividend			$ 50,400,000
Debt instrument interest rate during the period						8.00%
Prepayment premium percentage					0.50%	1.50%
Prepayment premium amount					$ 400,000	$ 1,400,000
Loss on extinguishment of debt					1,848,000	1,702,000
Amortization of debt issuance costs						4,500,000
Unamortized debt issuance cost						1,800,000
Letter of Credit
Line Of Credit Facility [Line Items]
Line of credit maximum borrowing capacity					6,000,000
Interest Expense
Line Of Credit Facility [Line Items]
Amortization of debt issuance costs					$ 200,000	$ 700,000
London Interbank Offered Rate (LIBOR)
Line Of Credit Facility [Line Items]
Percentage of LIBOR floor rate			1.00%	1.00%		1.00%
Applicable margin rate			7.00%	8.00%		7.00%
Term Loan
Line Of Credit Facility [Line Items]
Line of credit outstanding balance		$ 10,000,000	$ 160,000,000	$ 115,000,000		$ 70,000,000
Debt instrument, maturity date					Aug. 16, 2021
Debt Instrument, interest payments					quarterly
Repayment/prepaid of borrowings outstanding	$ 10,000,000	$ 60,000,000				90,000,000
Revolving Line of Credit
Line Of Credit Facility [Line Items]
Line of credit outstanding balance			7,500,000	$ 5,000,000
Modified Loan and Security Agreements
Line Of Credit Facility [Line Items]
Line of credit outstanding balance			$ 50,000,000
Amortization of debt issuance costs						$ 1,400,000
Standby Letters of Credit
Line Of Credit Facility [Line Items]
Line of credit outstanding balance							$ 6,000,000

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
General and Administrative Expenses
Related Party Transaction [Line Items]
Consulting fees		$ 1,100,000	$ 1,000,000
Non-Executive Employees
Related Party Transaction [Line Items]
Personal tax liabilities			$ 626,000
Personal tax liabilities, forgiven period			three-year
Personal tax liabilities, forgiven amount	$ 0		$ 200,000
Affiliated Entity
Related Party Transaction [Line Items]
Ordinary sales transactions with affiliate		858,000	37,000
Purchase transactions with affiliate		942,000	$ 313,000
Accounts payable		3,400
Accounts receivable		$ 516,000

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Nov. 17, 2017	Nov. 16, 2017	Oct. 31, 2017	Jun. 27, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018	Nov. 30, 2017
Class Of Stock [Line Items]
Shares authorized												310,000,000
Common stock, shares authorized					300,000,000		300,000,000					300,000,000
Preferred stock, shares authorized					10,000,000		10,000,000					10,000,000
Common stock, par value					$ 0.0001		$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001
Preferred stock, par value					$ 0.0001		$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001
Minimum percentage of redeemable convertible preferred stock owned by person or group to trigger liquidation event			50.00%
Minimum percentage of assets sold to trigger majority holders to require redemption of preferred stock			50.00%
Dividend rate, percentage				9.00%
Dividend rate, Per share amount				$ 90
Stock repurchased and retired					$ 487	$ 52
Redeemable Convertible Preferred Stock
Class Of Stock [Line Items]
Dividend declared and paid				$ 50,400
Dividends payable, date of record				Dec. 15, 2016
Stock issued, conversion of shares					(223,816)
Common Stock
Class Of Stock [Line Items]
Stock issued, conversion of shares					20,500,400
Treasury Stock
Class Of Stock [Line Items]
Repurchase of preferred and common stock, shares					190,434
Stock repurchased and retired					$ 487
Share price					$ 2.56
IPO | Redeemable Convertible Preferred Stock
Class Of Stock [Line Items]
Redeemable convertible preferred shares converted		223,816
Cumulative undeclared and unpaid dividends		$ 22,200
IPO | Common Stock
Class Of Stock [Line Items]
Stock issued, conversion of shares	20,500,400

Stock Option Plans and Stock-_3

Stock Option Plans and Stock-Based Compensation - Additional Information (Details)	1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 30, 2017USD ($)shares	Dec. 31, 2017USD ($)Employee$ / shares	Dec. 31, 2018USD ($)$ / sharesshares	Dec. 31, 2017USD ($)Employee$ / sharesshares	Dec. 31, 2016USD ($)Employee$ / sharesshares	Dec. 31, 2015$ / sharesshares	Feb. 25, 2019$ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average grant date fair value per share | $ / shares			$ 10.35	$ 4.32	$ 0.83
Total fair value of shares vested | $			$ 2,400,000	$ 300,000	$ 600,000
Total unrecognized compensation expense related to non-vested time-based stock options granted | $			$ 7,500,000
Unrecognized compensation expense, weighted-average period of recognition			2 years 1 month 6 days
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock reserve for issuance	1,771,375
Employee Stock Purchase Plan offering period	6 months
Maximum stock value of shares purchased by employees | $	$ 25,000		$ 25,000
Percentage of closing price of shares used to purchase shares	85.00%		85.00%
Increase in common stock reserved	885,688
Share-based compensation award, expiration date	Oct. 30, 2020
Shares of common stock purchased or distributed			168,000
2015 Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock reserve for issuance						250,000
Shares available for issuance			118,050
2015 Stock Option and Grant Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for issuance			530,953
2017 Long Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock reserve for issuance	8,856,876
Vesting period	4 years
Shares available for issuance			6,304,769
Shares of common stock options granted	4,428,438
Incentive Unit Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation expense related to non-vested time-based stock options granted | $			$ 300,000
Unrecognized compensation expense, weighted-average period of recognition			1 month 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost | $		$ 600,000		$ 2,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Number of Employees Affected | Employee		32		32
Share-based Compensation Arrangement by Share-based Payment Award, Share-based Liabilities Paid | $			$ 37,000	$ 116,000
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Accelerated Incremental Compensation Cost | $		$ 154,000
Number of shares, granted			0		1,677
Aggregate intrinsic value, non-vested | $		$ 32,500,000	$ 17,000,000	$ 32,500,000	$ 8,500,000
Weighted-average grant date fair value | $ / shares		$ 0.0517	$ 0.0517	$ 0.0517	$ 0.0517	$ 0.0517
Incentive Unit Plan | Executive | Vest Based On Performance Meeting Or Exceeding EBITDA Targets
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage			50.00%
Incentive Unit Plan | Executive | Vest 25% On First Anniversary Date of Grant, and Ratably Over Remaining Three Years
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage			50.00%
Incentive Unit Plan | Executive | First Anniversary Date Of Grant
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage			25.00%
Maximum | Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of employee compensation for employee payroll deduction	15.00%		15.00%
Minimum | Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of employee compensation for employee payroll deduction	1.00%		1.00%
Incentive Stock Options and Nonqualified Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock reserve for issuance						5,000,000
Expiration period						10 years
Incentive Stock Options and Nonqualified Stock Options | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						4 years
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock reserve for issuance						500,000
Total unrecognized compensation expense related to non-vested time-based stock options granted | $			$ 15,400,000
Unrecognized compensation expense, weighted-average period of recognition			3 years
Weighted-average grant date fair value | $ / shares							$ 19.30
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost | $		$ 74,000		$ 45,000	$ 98,000
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Number of Employees Affected | Employee		40		34	26
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Future Compensation Cost | $		$ 3,600,000		$ 3,600,000
Number of shares, granted				187,469	101,427
Weighted-average grant date fair value | $ / shares		$ 0		$ 0	$ 1.01	$ 1.11

Stock Option Plans and Stock-_4

Stock Option Plans and Stock-Based Compensation - Summary of Fair Value of Stock Options Estimated by Using Weighted Average Assumptions (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Time Based | Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected dividend rate	0.00%	0.00%	0.00%
Expected volatility			49.00%
Expected volatility, Minimum	40.00%	40.90%
Expected volatility, Maximum	46.00%	49.00%
Risk-free interest rate, Minimum	2.63%	1.96%	1.31%
Risk-free interest rate, Maximum	2.97%	2.18%	2.24%
Expected term (in years)	6 years 3 months	6 years 3 months
Time Based | Stock Options | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)			5 years 6 months
Time Based | Stock Options | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)			6 years 3 months
Time Based | Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected dividend rate	0.00%
Expected volatility, Minimum	40.00%
Expected volatility, Maximum	46.00%
Risk-free interest rate, Minimum	2.00%
Risk-free interest rate, Maximum	2.56%
Expected term (in years)	6 months
Performance Shares | Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected dividend rate		0.00%	0.00%
Expected volatility			49.00%
Expected volatility, Minimum		40.90%
Expected volatility, Maximum		49.00%
Risk-free interest rate, Minimum		1.96%	1.27%
Risk-free interest rate, Maximum		2.18%	2.16%
Performance Shares | Stock Options | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)		5 years 6 months	5 years 9 months
Performance Shares | Stock Options | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)		6 years 3 months 14 days	6 years 4 months 24 days

Stock Option Plans and Stock-_5

Stock Option Plans and Stock-Based Compensation - Summary of Time-Based Stock Option Activity (Details) - Time Based - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Beginning balances	3,500,075	1,622,118	1,326,449
Number of Options, Granted	82,549	1,592,370	419,839
Number of Options, conversion of performance to time based		591,892
Number of Options, Exercised	(637,188)	(152,330)	(6,568)
Number of Options, Forfeited	(128,110)	(153,975)	(117,602)
Number of Options, Ending balances	2,817,326	3,500,075	1,622,118	1,326,449
Number of Options, Options vested and expected to vest	2,817,326	3,500,075	1,622,118
Number of Options, Options vested and exercisable	1,095,211	926,614	416,265
Weighted Average Exercise Price Per share, Beginning balances	$ 5.43	$ 2.21	$ 2.38
Weighted Average Exercise Price (per share), Granted	23.17	9.54	1.69
Weighted Average Exercise Price (per share), Conversion of performance to time based		2.53
Weighted Average Exercise Price (per share), Exercised	2.84	2.22	1.77
Weighted Average Exercise Price (per share), Forfeited	3.20	2.21	2.31
Weighted Average Exercise Price (per share), Ending balances	6.64	5.43	2.21	$ 2.38
Weighted Average Exercise Price (per share), Options vested and expected to vest	6.64	5.43	2.21
Weighted Average Exercise Price (Per share), Options vested and exercisable	$ 4.72	$ 2.28	$ 2.36
Weighted Average Remaining Contractual Term (years)	8 years	8 years 9 months 18 days	8 years 10 months 24 days	9 years 8 months 12 days
Weighted Average Remaining Contractual Term (years), Options vested and expected to vest	8 years	8 years 9 months 18 days	8 years 10 months 24 days
Weighted Average Remaining Contractual Term (years), Options vested and exercisable	7 years 4 months 24 days	7 years 10 months 24 days	8 years 8 months 12 days
Aggregate Intrinsic Value, Balances	$ 47,589,066	$ 31,784,488	$ 1,546,599	$ 1,546,599
Aggregate Intrinsic Value, Options vested and expected to vest	47,589,066	31,784,488	1,546,599
Aggregate Intrinsic Value, Options vested and exercisable	$ 20,557,640	$ 11,324,729	$ 340,334

Stock Option Plans and Stock-_6

Stock Option Plans and Stock-Based Compensation - Summary of Non-vested Time-Based Vesting Stock Options (Detail) - Time Based - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of Shares
Number of Shares, Beginning Balance	2,583,249	1,216,796	1,315,668
Number of shares, granted	82,549	1,592,370	401,094
Number of Shares, Conversion of vested performance to time based		322,988
Number of Shares, Vested	(816,454)	(437,829)	(382,364)
Number of Shares, Forfeited	(121,728)	(111,076)	(117,602)
Non-vested number of shares, Ending Balance	1,727,616	2,583,249	1,216,796
Weighted average grant date Fair Value
Weighted average grant date Fair Value, Beginning Balance	$ 4.32	$ 1.05	$ 1.15
Weighted average grant date Fair Value, Granted	10.35	4.13	0.81
Weighted Average Grant Date Fair Value, Conversion of vested performance to time based		11.95
Weighted average grant date Fair Value, Vested	2.99	1.04	1.16
Weighted average grant date Fair Value, Forfeited	2.32	1.07	1.12
Weighted average grant date Fair Value, Ending Balance	$ 5.47	$ 4.32	$ 1.05

Stock Option Plans and Stock-_7

Stock Option Plans and Stock-Based Compensation - Summary of performance Vesting Stock Option Activity (Detail) - Performance Shares - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Beginning balances	412,773	322,846
Number of Options, Granted	187,469	101,427
Number of Options, Exercised	(8,350)	(4,000)
Number of Options, Forfeited		(7,500)
Number of options, Conversion of shares	(591,892)
Number of Options, Ending balances		412,773	322,846
Number of Options, Options vested and expected to vest	0	412,773	322,846
Number of Options, Options vested and exercisable	0	142,391	33,613
Weighted Average Exercise Price Per share, Beginning balances	$ 2.19	$ 2.32
Weighted Average Exercise Price (per share), Granted	3.27	1.77
Weighted Average Exercise Price (per share), Exercised	2.38	1.36
Weighted Average Exercise Price (per share), Forfeited		2.42
Weighted Average Exercise Price, Conversion of shares	2.53
Weighted Average Exercise Price (per share), Ending balances		2.19	$ 2.32
Weighted Average Exercise Price (per share), Options vested and expected to vest	0	2.19	2.32
Weighted Average Exercise Price (Per share), Options vested and exercisable	$ 0	$ 2.22	$ 2.33
Weighted Average Remaining Contractual Term (years)	8 years 6 months	8 years 10 months 24 days	9 years 8 months 12 days
Weighted Average Remaining Contractual Term (years), Options vested and expected to vest	0 years	8 years 10 months 24 days	9 years 8 months 12 days
Weighted Average Remaining Contractual Term (years), Options vested and exercisable	0 years	8 years 9 months 18 days	9 years 6 months
Aggregate Intrinsic Value, Exercised	$ 101,178	$ 1,942
Aggregate Intrinsic Value, Balances		401,616
Aggregate Intrinsic Value, Options vested and expected to vest	0	401,616
Aggregate Intrinsic Value, Options vested and exercisable	$ 0	$ 134,871

Stock Option Plans and Stock-_8

Stock Option Plans and Stock-Based Compensation - Summary of Non-vested Vesting Stock Options (Detail) - Performance Shares - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Number of Shares
Number of Shares, Beginning Balance	277,194	289,233
Number of shares, granted	187,469	101,427
Number of Shares, Vested	(141,675)	(106,903)
Number of Shares, Forfeited		(6,563)
Number of Shares, Conversion of non-vested performance to time based	(322,988)
Non-vested number of shares, Ending Balance	0	277,194
Weighted average grant date Fair Value
Weighted average grant date Fair Value, Beginning Balance	$ 1.01	$ 1.11
Weighted average grant date Fair Value, Granted	1.55	0.84
Weighted average grant date Fair Value, Vested	1.54	0.99
Weighted average grant date Fair Value, Forfeited		1.18
Weighted Average Grant Date Fair Value, Conversion of vested performance to time based	11.95
Weighted average grant date Fair Value, Ending Balance	$ 0	$ 1.01

Stock Option Plans and Stock-_9

Stock Option Plans and Stock-Based Compensation - Summary of Non-Vested Incentive Unit Activity (Detail) - Incentive Unit Plan - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of Shares
Number of Shares, Beginning Balance	2,242	4,127	5,526
Number of Shares, Granted	0		(1,677)
Number of Shares, Vested	(1,503)	(1,846)	7
Number of Shares, Forfeited	(16)	(39)	(20)
Number of Shares, Other			291
Non-vested number of shares, Ending Balance	723	2,242	4,127
Weighted-average exercise price (per share)
Weighted average grant date Fair Value, Beginning Balance	$ 0.0517	$ 0.0517	$ 0.0517
Weighted-average exercise price (per share), Granted			0.0517
Weighted-average exercise price (per share), Vested	0.0517	0.0517	0.0517
Weighted-average exercise price (per share), Forfeited	0.0517	0.0517	0.0517
Weighted-average exercise price (per share), Other			0.0517
Weighted average grant date Fair Value, Ending Balance	$ 0.0517	$ 0.0517	$ 0.0517

Stock Option Plans and Stock_10

Stock Option Plans and Stock-Based Compensation - Summary of Restricted Stock Unit Activity (Detail) - Restricted Stock Units - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Number of Shares
Number of Shares, Beginning Balance	897,284	0
Number of shares, granted	576,798	897,284
Number of Shares, Vested	(270,884)
Number of Shares, Forfeited	(55,195)
Non-vested number of shares, Ending Balance	1,148,003	897,284
Units expected to vest at December 31, 2017	1,148,003	897,284
Weighted-Average Remaining Contractual Term (In years)
Weighted-Average Remaining Contractual Term, Balances	1 year 9 months 18 days	9 years 10 months 24 days
Weighted-Average Remaining Contractual Term, Units expected to vest	1 year 9 months 18 days	9 years 10 months 24 days
Aggregate intrinsic value
Aggregate intrinsic value, Balances	$ 186
Aggregate intrinsic value, Units expected to vest	26,967	$ 186
Aggregate intrinsic value, Balances	$ 26,967	$ 186
Weighted average grant date Fair Value
Weighted average grant date Fair Value, Beginning Balance	$ 12.18
Weighted average grant date Fair Value, Granted	19.30	$ 12.18
Weighted average grant date Fair Value, Vested	12.61
Weighted average grant date Fair Value, Forfeited	17.58
Weighted average grant date Fair Value, Ending Balance	15.40	12.18
Weighted average grant date fair value, Units expected to vest	$ 15.40	$ 12.18

Stock Option Plans and Stock_11

Stock Option Plans and Stock-Based Compensation - Summary of Stock-Based Compensation Expense By Underlying Equity Instrument (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 18,975	$ 4,514	$ 568
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	1,098
Incentive Unit Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	8,582	3,185	60
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	3,943	1,011	$ 508
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 5,352	$ 318

Stock Option Plans and Stock_12

Stock Option Plans and Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 18,975	$ 4,514	$ 568
Cost of Revenue – Subscription
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	945	133	34
Cost of Revenue - Services and Other
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	1,504	458	63
Research and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	3,026	658	118
General and Administrative Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	7,798	2,062	96
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 5,702	$ 1,203	$ 257

Cost and Accumulated Depreciati

Cost and Accumulated Depreciation of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 23,481					$ 5,392
Less: accumulated depreciation	(4,213)					(2,374)
Total property and equipment, net	19,268	$ 10,103	$ 3,595	$ 3,126	$ 3,018	3,018
Computer equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	6,968					4,559
Buildout in progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	15,295
Other assets
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1,218					$ 833

Balance Sheet Related Items - A

Balance Sheet Related Items - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment [Line Items]
Depreciation expense	$ 1,900,000	$ 1,400,000	$ 900,000
Impairment of long-lived assets including intangible assets	0	0	$ 0
Property and equipment, gross	$ 23,481,000	$ 5,392,000
Minimum
Property Plant And Equipment [Line Items]
Property plant and equipment, useful life	3 years
Maximum
Property Plant And Equipment [Line Items]
Property plant and equipment, useful life	5 years
Buildout in progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 15,295,000
Buildout in progress | Minimum
Property Plant And Equipment [Line Items]
Property plant and equipment, useful life	3 years
Buildout in progress | Maximum
Property Plant And Equipment [Line Items]
Property plant and equipment, useful life	10 years

Accrued Expenses and Other Liab

Accrued Expenses and Other Liabilites (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Payables And Accruals [Abstract]
Commissions	$ 7,731					$ 8,559
Bonus	4,829					5,063
Payroll and related benefits	2,209					2,640
Partner and customer programs	1,538					1,234
Sales and other taxes	2,798					1,373
Other	2,626					3,767
Total	$ 21,731	$ 17,547	$ 12,639	$ 11,145	$ 22,636	$ 22,636

Prepayments and Other Assets -

Prepayments and Other Assets - Schedule of Prepayments and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Prepaid Expense And Other Assets Current [Abstract]
Deferred contract acquisition costs	$ 8,392					$ 2,931
Prepaid expenses	7,159					4,376
Contract assets	2,464
Other	3,835					2,706
Total	$ 21,850	$ 18,445	$ 17,329	$ 16,463	$ 15,861	$ 10,013

Prepayments and Other Assets _2

Prepayments and Other Assets - Schedule of Other Non-current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Assets Noncurrent [Abstract]
Deferred contract acquisition costs	$ 19,651					$ 3,018
Prepaid expenses	276					192
Contract assets	84
Other	363					332
Total	$ 20,374	$ 18,343	$ 17,429	$ 16,196	$ 16,774	$ 3,542

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Examination [Line Items]
U.S. federal corporate tax rate	21.00%	34.00%	34.00%
Tax benefit change in valuation allowance		$ 1,800,000
Recognized tax expense related to transition tax		0
Federal net operating loss carryforwards	$ 23,200,000	57,800,000
Research and development credits of approximately	$ 5,300,000	4,200,000
Net operating loss carry forwards expiration year	2034
Research and development credits expiration year	2025
Unrecognized tax benefits	$ 2,287,000	1,863,000	$ 883,000	$ 686,000
Interest or penalties expense	0	0	$ 0
Foreign Tax Authority
Income Tax Examination [Line Items]
Valuation allowance	2,700,000	1,700,000
U.S. Federal
Income Tax Examination [Line Items]
Valuation allowance	$ 0	$ 3,600,000
Income tax examination description	no longer subject to U.S. federal income tax examinations for years before 2015
State, Local and Foreign
Income Tax Examination [Line Items]
Income tax examination description	no longer subject to state, local and foreign income tax examinations by tax authorities for years before 2014
Maximum
Income Tax Examination [Line Items]
U.S. federal corporate tax rate		35.00%

Income Taxes - Summary of Conso

Income Taxes - Summary of Consolidated Income (Loss) Before Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Domestic	$ 6,951	$ (2,780)	$ (2,435)
Foreign	(2,191)	(2,519)	(2,723)
Income (loss) before income taxes	$ 4,760	$ (5,299)	$ (5,158)

Income Taxes - Summary of Provi

Income Taxes - Summary of Provision (Benefit) for Income Taxes Consisted (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2018	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
State							$ 630
Foreign							1,740
Total current							2,370
Deferred
Federal							(699)
State							(581)
Total deferred							(1,280)	$ 69	$ (2,537)
Provision (benefit)							1,090	2,293	(1,985)
ASC 605
Current
Federal								293
State								189	21
Foreign								1,997	531
Total current								2,479	552
Deferred
Federal								(293)	(1,315)
State								202	(118)
Foreign								(95)	(1,104)
Total deferred							(471)	(186)	(2,537)
Provision (benefit)	$ 380	$ 618	$ 441	$ 352	$ 793	$ 1,411	$ 1,791	$ 2,293	$ (1,985)

Income Taxes - Net Tax Effects

Income Taxes - Net Tax Effects of Temporary Differences between the Carring Amount of Significant Components of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Deferred tax assets:
Research and development and other credits	$ 4,461					$ 6,187
Net operating loss carryforward	8,147					14,795
Deferred revenue	4,747					1,355
Stock compensation	1,046					125
Accrued expense	1,182					1,323
Depreciable and amortizable assets	54					29
Other	95					228
Total deferred tax assets	19,732					24,042
Deferred tax liabilities:
Prepaid expenses	(5,889)					(1,249)
Intangibles	(15,280)					(17,232)
Total deferred tax liability, net	(1,437)
Total deferred tax asset, net						5,561
Less valuation allowance for deferred tax assets	(2,705)					(5,297)
Net deferred tax liabilities	$ (4,142)	$ (5,422)	$ (5,422)	$ (5,422)	$ (5,422)
Net deferred tax assets						$ 264

Income Taxes - Difference betwe

Income Taxes - Difference between Federal Income Tax Rate and Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
U.S. federal taxes at statutory rate	21.00%	34.00%	34.00%
Foreign tax rate differentials	16.70%	(9.10%)	(11.80%)
Research and development credit	(26.20%)	17.80%	18.20%
Foreign tax credit	0.00%	18.30%	4.70%
Amended federal return due to law change	(18.80%)	0.00%	0.00%
Stock options	(0.10%)	(23.60%)	(3.80%)
Permanent differences and other	3.80%	(14.40%)	(7.80%)
State taxes, net of federal benefit	9.60%	(4.00%)	(0.10%)
Change in state rate	0.00%	(1.90%)	7.30%
Change in valuation allowance due to operations	21.10%	(58.40%)	(1.90%)
Other	(4.20%)	(2.00%)	(0.30%)
Total income tax (benefit) expense	22.90%	(43.30%)	38.50%

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Beginning balance	$ 1,863	$ 883	$ 686
Additions based on tax positions related to prior year		507	197
Reductions based on tax positions related to current year	(263)
Additions based on tax positions related to current year	687	473
Ending balance	$ 2,287	$ 1,863	$ 883

Net Income (Loss) Per Share A_3

Net Income (Loss) Per Share Attributable to Common Stockholders - Schedule of Calculation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2018	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Numerator:
Net income (loss)							$ 3,670	$ (7,592)	$ (3,173)
Deemed dividends to preferred stockholders								(21,129)	(23,618)
Net income (loss) available to common stockholders								$ (28,721)	$ (26,791)
Denominator
Basic							86,495,301	52,339,804	45,933,218
Diluted							90,002,752	52,339,804	45,933,218
Net income (loss) attributable to common stockholders per share
Basic							$ 0.04	$ (0.55)	$ (0.58)
Diluted							$ 0.04	$ (0.55)	$ (0.58)
As Reported (ASC 605)
Numerator:
Net income (loss)	$ 5,979	$ 3,302	$ (5,647)	$ (5,967)	$ (11,614)	$ (8,312)	$ (2,333)
Earnings allocated to participating securities							29
Net income (loss) available to common stockholders							$ (2,362)
Denominator
Basic	87,171,161	86,825,168	86,246,056	85,719,240	85,984,103	86,267,539	86,495,301
Diluted	90,234,993	90,355,212	86,246,056	85,719,240	85,984,103	86,267,539	86,495,301
Net income (loss) attributable to common stockholders per share
Basic	$ 0.07	$ 0.04	$ (0.07)	$ (0.07)	$ (0.14)	$ (0.10)	$ (0.03)
Diluted	$ 0.07	$ 0.04	$ (0.07)	$ (0.07)	$ (0.14)	$ (0.10)	$ (0.03)
Accounting Standards Update 2014-09
Numerator:
Net income (loss)	$ 5,143	$ 1,808	$ (979)	$ (2,302)	$ (3,281)	$ (1,473)	$ 3,670
Earnings allocated to participating securities							29
Net income (loss) available to common stockholders							$ 3,641
Denominator
Basic	87,171,161	86,825,168	86,246,056	85,719,240	85,984,103	86,267,539	86,495,301
Diluted	90,234,993	90,355,212	86,246,056	85,719,240	85,984,103	86,267,539	90,002,752
Net income (loss) attributable to common stockholders per share
Basic	$ 0.06	$ 0.02	$ (0.01)	$ (0.03)	$ (0.04)	$ (0.02)	$ 0.04
Diluted	$ 0.06	$ 0.02	$ (0.01)	$ (0.03)	$ (0.04)	$ (0.02)	$ 0.04

Net Income (Loss) Per Share A_4

Net Income (Loss) Per Share Attributable to Common Stockholders - Weighted Average Outstanding Shares of Common Stock Equivalents Excluded from the Computation of the Diluted Net Loss per Share (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted average outstanding shares of common stock equivalents excluded from the computation of diluted net loss per share	48,369	5,422,857	6,731,392
Stock Options to Purchase Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted average outstanding shares of common stock equivalents excluded from the computation of diluted net loss per share	35,531	2,402,225	1,799,632
RSUs Issued and Outstanding
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted average outstanding shares of common stock equivalents excluded from the computation of diluted net loss per share	12,838	105,404
Non-Vested Incentive Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted average outstanding shares of common stock equivalents excluded from the computation of diluted net loss per share		2,915,228	4,931,760

Geographic Information and Ma_3

Geographic Information and Major Customers - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018Segment
Segment Reporting [Abstract]
Number of reportable segments	1

Geographic Information and Ma_4

Geographic Information and Major Customers - Summary of Consolidated Total Revenue by Geography (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
ASC 605
Summary of Significant Accounting Policies [Line Items]
Total revenue	$ 248,475	$ 186,056	$ 132,412
ASC 606
Summary of Significant Accounting Policies [Line Items]
Total revenue	248,920
United States | ASC 605
Summary of Significant Accounting Policies [Line Items]
Total revenue	169,927	134,676	92,116
United States | ASC 606
Summary of Significant Accounting Policies [Line Items]
Total revenue	171,497
EMEA | ASC 605
Summary of Significant Accounting Policies [Line Items]
Total revenue	49,854	33,097	25,668
EMEA | ASC 606
Summary of Significant Accounting Policies [Line Items]
Total revenue	49,871
Rest of the World | ASC 605
Summary of Significant Accounting Policies [Line Items]
Total revenue	28,694	$ 18,283	$ 14,628
Rest of the World | ASC 606
Summary of Significant Accounting Policies [Line Items]
Total revenue	$ 27,552

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018USD ($)
Postemployment Benefits [Abstract]
Company contributions	$ 0
Defined contribution plan name	401(k) Plan

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - USD ($)	Mar. 11, 2019	Jun. 28, 2017	Aug. 31, 2016	Dec. 31, 2017	Dec. 31, 2018
Subsequent Event [Line Items]
Line of credit outstanding balance		$ 167,500,000	$ 120,000,000		$ 0
Debt instrument interest rate during the period				8.00%
London Interbank Offered Rate (LIBOR)
Subsequent Event [Line Items]
Applicable interest margin rate based on senior secured net leverage ratio		7.00%	8.00%	7.00%
Subsequent Event
Subsequent Event [Line Items]
Letter of credit sublimit	$ 15,000,000
Credit agreement mature date	Mar. 31, 2024
Debt instrument, description of variable rate basis	one-month Adjusted LIBO Rate
Subsequent Event | Minimum
Subsequent Event [Line Items]
Payment of unused commitment fee under credit agreement based on senior secured net leverage ratio	0.20%
Subsequent Event | Maximum
Subsequent Event [Line Items]
Payment of unused commitment fee under credit agreement based on senior secured net leverage ratio	0.30%
Subsequent Event | Federal Funds Effective Rate
Subsequent Event [Line Items]
Debt instrument interest rate during the period	1.00%
Subsequent Event | London Interbank Offered Rate One Month (LIBOR)
Subsequent Event [Line Items]
Debt instrument interest rate during the period	1.00%
Subsequent Event | London Interbank Offered Rate One Month (LIBOR) | Minimum
Subsequent Event [Line Items]
Applicable interest margin rate based on senior secured net leverage ratio	0.25%
Subsequent Event | London Interbank Offered Rate One Month (LIBOR) | Maximum
Subsequent Event [Line Items]
Applicable interest margin rate based on senior secured net leverage ratio	0.75%
Subsequent Event | London Interbank Offered Rate (LIBOR) | Minimum
Subsequent Event [Line Items]
Applicable interest margin rate based on senior secured net leverage ratio	1.25%
Subsequent Event | London Interbank Offered Rate (LIBOR) | Maximum
Subsequent Event [Line Items]
Applicable interest margin rate based on senior secured net leverage ratio	1.75%
Revolving Credit Loans
Subsequent Event [Line Items]
Line of credit outstanding balance		$ 7,500,000	$ 5,000,000
Revolving Credit Loans | Subsequent Event
Subsequent Event [Line Items]
Initail commitments for credit loans under credit agreement	$ 150,000,000
Line of credit outstanding balance	$ 0