Sailpoint Technologies S-1/A 14 Aug 18 IPO registration (amended) Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2018
Document And Entity Information [Abstract]
Document Type	S1
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Trading Symbol	SAIL
Entity Registrant Name	SailPoint Technologies Holdings, Inc.
Entity Central Index Key	1,627,857
Entity Filer Category	Non-accelerated Filer

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 81,809	$ 116,049	$ 18,214
Restricted cash	120	78	58
Accounts receivable	55,196	72,907	48,791
Prepayments and other current assets	9,784	10,013	7,694
Total current assets	146,909	199,047	74,757
Property and equipment, net	3,595	3,018	1,855
Deferred tax asset - non-current	264	264	428
Other non-current assets	3,328	3,542	980
Goodwill	219,377	219,377	219,377
Intangible assets, net	76,773	81,185	90,013
Total assets	450,246	506,433	387,410
Current liabilities
Accounts payable	2,894	2,231	787
Accrued expenses and other liabilities	14,106	22,636	13,105
Income taxes payable	1,423	1,688	818
Deferred revenue	81,322	73,671	49,850
Total current liabilities	99,745	100,226	64,560
Deferred tax liability-non-current			95
Long-term debt	9,640	68,329	107,344
Other long-term liabilities	51	27	54
Deferred revenue non-current	13,817	9,454	5,254
Total liabilities	123,253	178,036	177,307
Commitments and contingencies
Stockholders' (deficit) equity
Common stock, value	9	8	5
Preferred stock, value
Treasury stock, at cost		0	0
Additional paid in capital	363,818	353,609	3,739
Accumulated deficit	(36,834)	(25,220)	(17,628)
Total stockholders' (deficit) equity	326,993	328,397	(13,884)
Total redeemable convertible preferred stock and stockholders' equity (deficit)		328,397	210,103
Total liabilities and stockholders’ equity	$ 450,246	506,433	387,410
Redeemable Convertible Preferred Stock
Current liabilities
Redeemable convertible preferred stock, value		$ 0	$ 223,987

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, shares authorized	300,000,000	300,000,000	59,500,000
Common stock, shares issued	86,596,023	84,948,126	46,397,369
Common stock, shares outstanding	86,596,023	84,948,126	46,397,369
Preferred stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	10,000,000	10,000,000	0
Preferred stock, shares issued	0	0	0
Preferred stock, shares outstanding	0	0	0
Treasury stock, shares		0	0
Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock, par value		$ 0.0001	$ 0.0001
Redeemable convertible preferred stock, shares authorized		0	500,000
Redeemable convertible preferred stock, shares issued		0	223,987
Redeemable convertible preferred stock, shares outstanding		0	223,987

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue
Total revenue	$ 104,274	$ 74,726	$ 186,056	$ 132,412	$ 95,356
Cost of revenue
Total cost of revenue	26,146	20,830	44,590	37,038	29,259
Gross profit	78,128	53,896	141,466	95,374	66,097
Operating expenses
Research and development	19,877	14,893	33,331	24,358	19,965
General and administrative	15,400	6,474	17,678	9,680	7,474
Sales and marketing	48,978	33,513	80,514	58,607	46,831
Total operating expenses	84,255	54,880	131,523	92,645	74,270
Income (loss) from operations	(6,127)	(984)	9,943	2,729	(8,173)
Other expense, net:
Interest expense, net	(3,978)	(5,353)	(14,783)	(7,277)	(3,883)
Other, net	(716)	(94)	(459)	(610)	(1,365)
Total other expense, net	(4,694)	(5,447)	(15,242)	(7,887)	(5,248)
Loss before income taxes	(10,821)	(6,431)	(5,299)	(5,158)	(13,421)
Income tax (expense) benefit	(793)	(156)	(2,293)	1,985	2,614
Net loss	(11,614)	(6,587)	(7,592)	(3,173)	(10,807)
Net loss available to common shareholders	$ (11,614)	$ (19,177)	$ (28,721)	$ (26,791)	$ (32,404)
Net loss per share
Basic	$ (0.14)	$ (0.40)	$ (0.55)	$ (0.58)	$ (0.74)
Diluted	$ (0.14)	$ (0.40)	$ (0.55)	$ (0.58)	$ (0.74)
Weighted average shares outstanding
Basic	85,984,103	47,567,048	52,339,804	45,933,218	43,929,159
Diluted	85,984,103	47,567,048	52,339,804	45,933,218	43,929,159
Licenses
Revenue
Total revenue	$ 36,115	$ 25,577	$ 79,209	$ 54,395	$ 44,124
Cost of revenue
Total cost of revenue	2,398	2,197	4,561	4,278	4,293
Subscription
Revenue
Total revenue	48,056	31,276	71,007	49,364	29,930
Cost of revenue
Total cost of revenue	9,577	7,513	16,406	13,051	9,815
Service and other
Revenue
Total revenue	20,103	17,873	35,840	28,653	21,302
Cost of revenue
Total cost of revenue	$ 14,171	$ 11,120	$ 23,623	$ 19,709	$ 15,151

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities
Net loss	$ (11,614)	$ (6,587)	$ (7,592)	$ (3,173)	$ (10,807)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization expense	5,278	4,978	10,220	9,982	9,620
Amortization of loan origination fees	191	307	746	749	140
Gain on disposal of fixed assets	(48)	(5)	(20)	5	15
Loss on modification and partial extinguishment of debt	1,536		1,702
Stock-based compensation expense	9,255	343	4,514	568	246
Deferred taxes			69	(2,537)	(3,326)
Accounts receivable	17,711	1,283	(24,116)	(17,245)	(5,252)
Prepayments and other current assets	229	1,743	(2,174)	(2,779)	(1,173)
Other non-current assets	214	(1,570)	(2,453)	(857)	97
Accounts payable	663	835	1,443	(262)	(640)
Accrued expenses and other liabilities	(8,557)	(2,731)	10,882	1,712	3,068
Income taxes payable (receivable)	(264)	(229)	614	161	(56)
Deferred revenue	12,013	7,662	28,021	20,216	11,628
Changes in operating assets and liabilities, net of acquisition:
Net cash provided by operating activities	26,607	6,029	21,856	6,540	3,560
Investing activities
Purchase of property and equipment	(1,405)	(1,263)	(2,711)	(1,263)	(1,232)
Proceeds from sale of property and equipment	8	109	190	8	133
Cash paid for acquisition, net of cash acquired					(15,209)
Net cash used in investing activities	(1,397)	(1,154)	(2,521)	(1,255)	(16,308)
Financing activities
Proceeds from line of credit					10,000
Repayments of line of credit				(10,000)
Proceeds from term loan			50,000	115,000
Repayments of term loan			(90,000)	(105,000)
Repayment of debt	(60,000)
Prepayment penalty and fees	(300)		(1,390)
Proceeds from borrowing		50,000
Dividend payments		(50,387)	(50,387)
Debt issuance costs		(1,494)	(1,384)	(3,083)
Proceeds from issuance of equity, net			171,980	1,329	307
Repurchase of equity shares	(1)	(442)	(658)	(226)	(458)
Exercise of stock options	893	136	359	18
Net cash provided by (used in) financing activities	(59,408)	(2,187)	78,520	(1,962)	9,849
(Decrease) increase in cash	(34,198)	2,688	97,855	3,323	(2,899)
Cash, cash equivalents and restricted cash, beginning of period	116,127	18,272	18,272	14,949	17,848
Cash, cash equivalents and restricted cash, end of period	81,929	20,960	116,127	18,272	14,949
Supplemental disclosure of cash flow information:
Cash paid for interest	2,401	5,882	16,628	5,848	3,648
Cash paid for income taxes	723	374	1,612	406	771
Conversion of redeemable convertible preferred stock to common stock			173,429
Conversion of prepaid incentive units to common stock (Note 7)	$ 65	$ 21	$ 78	89	$ 62
Forgiveness of liability to controlling entity				$ 459

CONSOLIDATED STATEMENTS OF REDE

CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY - USD ($) $ in Thousands	Total	Redeemable Convertible Preferred Stock	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Deficit
Stockholders' Equity Balance at Dec. 31, 2014	$ (1,395)		$ 4		$ 2,249	$ (3,648)
Temporary Equity Balance at Dec. 31, 2014		$ 223,084
Stockholders' Equity Balance, shares at Dec. 31, 2014			43,580,028
Temporary Equity Balance, Shares at Dec. 31, 2014		223,084
Issuance of common stock	59				59
Issuance of preferred stock		$ 248
Issuance of preferred and common stock, shares		248	48,349
Repurchase of common stock	(24)				(24)
Repurchase of preferred stock		$ (434)
Repurchase of common and preferred stock, shares		(434)	(84,808)
Temporary Equity Balance at Dec. 31, 2015		$ 222,898
Temporary Equity Balance, Shares at Dec. 31, 2015		222,898
Stock-based compensation expense, net	246				246
Incentive units vested	62				62
Incentive units vested, shares			1,192,731
Net loss	(10,807)					(10,807)
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 stock		$ 1,263
Issuance of preferred and common stock, shares		1,263	36,079
Repurchase of common stock	(52)				(52)
Repurchase of preferred stock		$ (174)
Repurchase of common and preferred stock, shares		(174)	(62,402)
Temporary Equity Balance at Dec. 31, 2016		$ 223,987
Temporary Equity Balance, Shares at Dec. 31, 2016		223,987
Exercise of stock options	$ 18				18
Exercise of stock options, shares	6,568		10,568
Capital contribution	$ 459				459
Stock-based compensation expense, net	568				568
Incentive units vested	89		$ 1		88
Incentive units vested, shares			1,676,824
Net loss	(3,173)					(3,173)
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		$ (173,429)
Conversion of preferred stock to common stock upon initial public offering, shares		223,816	20,500,400
Repurchase of preferred stock		$ (171)
Repurchase of preferred and common stock	(487)			$ (487)
Repurchase of preferred and common stock, shares				190,434
Repurchase of common and preferred stock, shares		(171)
Preferred dividend payment		$ (50,387)
Temporary Equity Balance at Dec. 31, 2017		$ 0
Temporary Equity Balance, Shares at Dec. 31, 2017		0
Exercise of stock options	$ 359				359
Exercise of stock options, shares	152,330		160,680
Treasury stock activity				$ 487	(487)
Treasury stock activity, shares			(112,772)	(190,434)
Stock-based compensation expense, net	$ 4,514				4,514
Incentive units vested	78				78
Incentive units vested, shares			2,202,449
Net 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 loss	(11,614)
Stockholders' Equity Balance at Jun. 30, 2018	$ 326,993

Organization and Description of

Organization and Description of Business	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Organization And Description Of Business [Abstract]
Organization and Description of Business	1. Organization and Description of Business SailPoint Technologies Holdings, Inc. (“we,” “our,” “the Company” or “SailPoint”) was incorporated in the state of Delaware on August 8, 2014, in preparation for the purchase of SailPoint Technologies, Inc. The purchase (the “Acquisition”) occurred on September 8, 2014. 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.	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	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated interim financial statements have been prepared in accordance with Article 10 of Regulation S-X, “Interim Financial Statements” and the rules and regulations for Form 10-Q of the Securities and Exchange Commission (the “SEC”). Pursuant to those rules and regulations, the Company has condensed or omitted certain information and footnote disclosure it normally includes in its annual consolidated financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the balance sheet, statements of operations and the statements of cash flows for the interim periods but are not necessarily indicative of the results of operations to be anticipated for the full year ending December 31, 2018 or any future period. Our unaudited consolidated financial statements have been prepared in a manner consistent with the accounting principles described in our Company’s Annual Report on Form 10-K for the year ended December 31, 2017, which was filed with the SEC on March 19, 2018 (the “Annual Report”). These financial statements and accompanying notes should be read in conjunction with the consolidated financial statements and notes thereto in the Company’s Annual Report. All intercompany accounts and transactions have been eliminated in consolidation. 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. Segment Information and Concentration of Credit and Other Risks Segment Information The Company operates as one operating segment. The Company’s chief operating decision maker is its chief executive officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance and allocating resources. 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 maker 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 tables sets forth the Company’s consolidated total revenue by geography: Six Months Ended June 30, 2017 2018 (In thousands) United States $ 53,020 $ 67,195 EMEA (1) 13,853 24,952 Rest of the World (1) 7,853 12,127 Total revenue $ 74,726 $ 104,274 (1) No single country represented more than 10% of our consolidated revenue. Concentration of Credit Risk 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. There is no concentration of credit risk for customers as no individual entity represented more than 10% of the balance in accounts receivable as of December 31, 2017 and June 30, 2018 or 10% of revenue for six months ended June 30, 2017 and 2018. The Company does not experience concentration of credit risk in foreign countries as no foreign country represents more than 10% of the Company’s condensed consolidated revenues or net assets. Significant Accounting Policies There have been no significant changes to the Company’s significant accounting policies, which are discussed in Note 2 of “Notes to Consolidated Financial Statements” in the Annual Report. Recently Issued Accounting Standards Not Yet Adopted Under the Jumpstart Our Business Startups Act (the “JOBS Act”), emerging growth companies can delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have elected to take advantage of the longer phase-in periods for the adoption of new or revised financial accounting standards under the JOBS Act until we are no longer an emerging growth company. In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No . , Revenue from Contracts with Customers (Topic 606) With the evaluation of ASC 606 adoption, the Company plans to adopt the standard under the modified retrospective method. The Company’s determination was made upon a number of factors such as the significance of the impact of the new standard on the Company’s financial results, system readiness, including that of software procured from third-party providers, and the Company’s ability to accumulate and analyze the information necessary to assess the impact on prior period financial statements, as necessary and earlier than expected loss of emerging growth company status. The Company will continue to evaluate and analyze all other aspects of ASC 606 that may impact it. The Company will adopt the new revenue standard for the annual reporting period ending December 31, 2018, using the modified retrospective transition method. Under this method, the Company elects to apply the cumulative effect method to contracts that are not complete as of the adoption date. The Company is continuing to finalize the impact of adopting the new revenue standard on its condensed consolidated financial statements and related disclosures, changes to its accounting policies and practices and controls to support the new revenue recognition standard. The Company has developed a project plan for this transition, which includes necessary changes to accounting policies, processes, internal controls, and system requirements and is progressing as planned. The Company expects to implement the plan in time to report in accordance with ASC 606 for the annual reporting period for the year ended December 31, 2018. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory In July 2017, the FASB issued ASU No. 2017-11, Earnings Per Share (Topic 260). Recently Adopted Accounting Standards In May 2017, the FASB issued ASU No. 2017-09, Compensation—Stock Compensation (Topic 718).	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 maker is its chief executive officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance and allocating resources. 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 elements 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 of December 31, 2016 2017 (In thousands) Cash and cash equivalents per balance sheet $ 18,214 $ 116,049 Restricted cash per balance sheet 58 78 Cash, cash equivalents and restricted cash per cash flow $ 18,272 $ 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, accrued expenses and related party payable approximate their fair values due to their short maturities. 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, 2016 and 2017. 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. There is no concentration of credit risk for customers as no individual entity represented more than 10% of the balance in accounts receivable as of December 31, 2016 and 2017 or 10% of revenue in the years ended December 31, 2015, 2016 and 2017. 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, 2015 2016 2017 (In thousands) United States $ 63,440 $ 92,116 $ 134,676 EMEA (1) 20,770 25,668 33,097 Rest of the World (1) 11,146 14,628 18,283 Total revenue $ 95,356 $ 132,412 $ 186,056 (1) 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. 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 its carrying value over its fair value. Assets to be disposed of are reported at the lower of carrying value or net realizable value. There was no impairment of property and equipment during the years ended December 31, 2015, 2016 and 2017. 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, or more often if and when events or circumstances indicate that the carrying value may not be recoverable. Goodwill is tested using a two-step process. The first step 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. The second step of the goodwill impairment test, used to measure the amount of impairment loss, compares the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. If the carrying amount of reporting unit goodwill exceeds the implied fair value of that goodwill, an impairment loss shall be recognized 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. If the implied fair value of goodwill is less than the carrying value of goodwill, an impairment loss is recognized equal to the difference. There were no impairments of goodwill during the years ended December 31, 2015, 2016 and 2017. The Company elected to change the annual assessment date for goodwill and indefinite lived intangible assets from December 31st to October 31st because the change in date creates synergy and enhance the quality of our indefinite lived intangible assets impairment analysis. The Company conducted qualitative and quantitative assessment, for the 2017 annual impairment test, using the income, cost and market approach, using information as of October 31, 2017. The intent is to perform qualitative impairment test at least annually unless certain indicators or events suggest otherwise. 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, then 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 as of December 31, 2016 and 2017. 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 has substantially coincided. As a result, software development costs qualifying for capitalization have been insignificant. Therefore, we have not capitalized any software development costs through December 31, 2017. 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 loss is equal to net loss for all periods presented. Liquidity The Company has sustained losses since its inception. The Company had cash, cash equivalents and restricted cash of approximately $116.1 million and an accumulated deficit of approximately $25.2 million at December 31, 2017. The Company has funded these losses through cash flows from operations, debt, issuance of common stock and other equity financings. The Company believes that working capital on hand, net operating cash flows, and increasing revenues are sufficient to sustain operations for at least the twelve months from the report issuance date. Revenue Recognition 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. Deferred Revenue Deferred revenue represents amounts from the sale of products that have been billed for, but the transaction has not met our revenue recognition criteria. Amounts are classified between current and long-term liabilities, based upon the expected period in which the revenue will be recognized. Customer advances and billed amounts due from customers in excess of revenue recognized are recorded as deferred revenue. Cost of Revenue Cost of revenue for license 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 $2.6 million, $4.2 million and $6.0 million for the years ended December 31, 2015, 2016 and 2017, respectively, and are included in sales and marketing expense. Stock-Based Compensation The Company measures stock-based compensation cost 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 expected term, fair value of common stock, expected volatility, 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. Compensation cost resulting from this valuation is recognized in the consolidated statement 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 option. The Company is required to estimate potential forfeitures of stock grants and adjust recorded compensation cost 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. 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 Loss Per Share Basic net loss per share attributable to common stockholders is calculated by dividing the net loss attributable to common stockholders for the period, defined as net 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, 2015, 2016 and 2017 excluded common stock equivalents because their inclusion would be anti-dilutive or would decrease the reported loss per share. 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 loss per share using the two-class method. Under the two-class method, basic and diluted net loss per share is determined by calculating net 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 Under the Jumpstart Our Business Startups Act (the “JOBS Act”), emerging growth companies can delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have elected to take advantage of the longer phase-in periods for the adoption of new or revised financial accounting standards under the JOBS Act until we are no longer an emerging growth company. In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) The Company currently plans to adopt using the full retrospective approach; however, a final decision regarding the adoption method has not been made at this time. The Company’s final determination will depend on a number of factors such as the significance of the impact of the new standard on the Company’s financial results, system readiness, including that of software procured from third-party providers, and the Company’s ability to accumulate and analyze the information necessary to assess the impact on prior period financial statements, as necessary. The Company is in the initial stages of its evaluation of the impact of the new standard on its accounting policies, and processes. The Company has assigned internal resources in addition to the engagement of third party service providers to assist in the evaluation. While the Company continues to assess all potential impacts under the new standard there may be the potential for significant impacts to the timing of recognition of professional services revenue, and contract acquisition costs, both with respect to the amounts that will be capitalized as well as the period of amortization. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory In May 2017, the FASB issued ASU No. 2017-09, Compensation—Stock Compensation (Topic 718). In July 2017, the FASB issued ASU No. 2017-011, Earnings Per Share (Topic 260). Recently Adopted Accounting Pronouncements In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements—Going Concern (Subtopic 205-40). This ASU defines management’s responsibility to evaluate whether there is substantial doubt about an organization’s ability to continue as a going concern and to provide related footnote disclosures. Prior to this ASU, GAAP lacked guidance about management’s responsibility to evaluate whether there is substantial doubt about the organization’s ability to continue as a going concern or to provide related footnote disclosures and all guidance was included in generally accepted auditing standards (“GAAS”). This guidance is effective for annual periods ending after December 15, 2016. Early adoption is permitted. This standard has been adopted beginning with the reporting period ended December 31, 2016. The adoption of ASU 2014-15 did not have a material effect on the Company’s consolidated financial statements and related disclosures, although it could have an impact on disclosures in future periods. In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): In April 2015, the FASB issued ASU No. 2015-03, Interest—Imputation of Interest (Subtopic 835-30)— Simplifying the Presentation of Debt Issuance Costs In April 2015, the FASB issued ASU No. 2015-05, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement In September 2015, the FASB issued ASU No. 2015-16 , Business Combinations (Topic 805 In November 2015, the FASB issued ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes In March 2016, the FASB issued ASU No. 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments—a consensus of the Emerging Issues Task Force Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force) In January 2017, the FASB issued ASU No. 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	3. Goodwill and Intangible Assets 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 for the periods ended June 30, 2017 and 2018 as there has been no acquisition activity in these periods. Goodwill and other intangible balances are tested for impairment on an annual basis during the fourth quarter, or sooner if an indicator of impairment occurs. No triggering events have occurred during the six months ended June 30, 2017 and 2018 that would indicate a potential impairment of goodwill. Intangible Assets Total cost and accumulated amortization of intangible assets is comprised of the following: Weighted Average Useful Life As of December 31, 2017 June 30, 2018 (In years) (In thousands) Intangible assets, net 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 related items 4.4 810 810 Total intangible assets 110,910 110,910 Less: Accumulated amortization (29,725 ) (34,137 ) Total intangible assets, net $ 81,185 $ 76,773 Amortization expense of intangible assets was $4.4 million for the six months ended June 30, 2017, and was $4.4 million for the six months ended June 30, 2018. Amortization expense is included in the condensed consolidated statements of operations for the six months ended June 30, 2017 and 2018 as follows: Six Months Ended June 30, 2017 2018 (In thousands) Cost of revenue—license $ 2,016 $ 2,016 Cost of revenue—subscription 192 192 Research and development 81 68 Sales and marketing 2,139 2,136 Total amortization of acquired intangibles $ 4,428 $ 4,412 Periodically, the Company evaluates intangible assets for possible impairment. There were no impairments for intangible assets during the six months ended June 30, 2017 and 2018.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	4. 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. 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, which is included in accrued expenses and other liabilities on the accompanying condensed consolidated balance sheets. Rent expense under all operating leases was approximately $1.2 million for the six months ended June 30, 2017, and $1.9 million for the six months ended June 30, 2018. 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 its cloud customers warranting certain levels of uptime reliability and performance and permitting those customers to receive credits in the event that it fails 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, the Company has not accrued any liabilities related to these commitments in our condensed 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 financial statements.	7. 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 on the consolidated balance sheets. Future minimum annual lease payments under these non-cancelable operating leases, inclusive of sublease proceeds, as of December 31, 2017 are as follows: (In thousands) Year ending December 31, 2018 $ 2,785 2019 3,004 2020 4,445 2021 4,997 2022 4,921 Thereafter 32,127 Total minimum lease payments $ 52,279 Rent expense under all operating leases was approximately $1.5 million, $1.8 million and $2.9 million, for the years ended December 31, 2015, 2016 and 2017, respectively. The Company had a deferred rent balance of approximately $0.2 million and $1.4 million as of December 31, 2016 and 2017, which is included in accrued expenses and other liabilities on the accompanying 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 financial statements.

Line of Credit and Long-Term De

Line of Credit and Long-Term Debt	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Line Of Credit Facility [Abstract]
Line of Credit and Long-Term Debt	5. Line of Credit and Long-Term Debt The outstanding balance of the term loan at December 31, 2017 and June 30, 2018 was $70.0 million and $10.0 million, respectively. There was no outstanding balance of the revolving line of credit at December 31, 2017 and June 30, 2018. The Company was in compliance with all applicable covenants as of December 31, 2017 and June 30, 2018. 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 its 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 consolidated statements of operations for the years ended December 31, 2017. In October 2017, in connection with its new corporate headquarters lease, the Company executed a standby letter of credit in the amount of $6.0 million. The term loan and the credit facility both bear interest based on the adjusted LIBOR rate, as defined in the credit agreement, with a 1% floor plus an applicable margin of 4.5%. The Company has 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 as of December 31, 2017. These costs are being amortized to interest expense over the life of the debt on a straight-line basis, which approximates the interest method. 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. This repayment was subject to a prepayment premium of 0.50%, approximately $0.3 million, which is recorded as interest expense. In connection with the debt paydown, the Company incurred a $1.5 million loss on the modification and partial extinguishment of debt which was also recorded as interest expense in the consolidated statements of operations for the six months ended June 30, 2018. Amortization of debt issuance costs for the existing loan and security agreement as of June 30, 2017 and June 30, 2018, was approximately $0.3 million and $0.2 million, respectively, and was recorded in interest expense in the accompanying condensed consolidated statements of operations. As of June 30, 2018, the balance of long-term debt is $9.6 million, which is presented net of $0.4 million of unamortized debt issuance costs. The maturity date on the term loan is August 16, 2021, with principal payment due in full on the maturity date, and interest payments due quarterly. The rate prevalent at June 30, 2018 was 6.8% consisting of the 2.3% LIBOR rate, plus an applicable margin of 4.5% for the term loan and the revolving credit facility.	8. Line of Credit and Long-Term Debt In 2014, the Company entered into a loan and security agreement with a financial institution in the amount of $110 million, consisting of a term loan facility of $100 million and a revolving loan facility of up to $10 million. The loan and security agreement established first security for the financial institution over all assets of the Company. Borrowings under this agreement bore interest based on LIBOR and was 3.7% per annum on the term loan and 3.5% on the revolving loan at December 31, 2015. The maturity date on the term loan was September 2019 and on the revolving loan was January 2016. The outstanding loans were repaid in full in August 2016, as discussed below. The Company incurred debt issuance costs of $0.7 million in connection with this loan and security agreement. These costs were amortized to interest expense over the term, through the debt extinguishment in 2016. In August 2016, the Company repaid in full the 2014 loan and security agreement. Concurrently, the Company entered into a senior secured credit facility with a different 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 is August 16, 2021, with principal payment due in full on maturity date, and interest payments due quarterly. The agreement also requires 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 may be 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 (the “New Financing”). Proceeds from the New Financing were used to partially fund $50.4 million in accumulated preferred stock dividends for shares of preferred stock through December 15, 2016. Borrowings under the New Financing agreement will 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 and December 31, 2016 was 9.0%, consisting of the 1% floor plus 8% margin. The maturity date on the term loan remains August 16, 2021, with principal payment due in full at maturity and interest payments due quarterly. The agreement also requires prepayments in the case of certain events including: asset sales in excess of $1.0 million, proceeds from an IPO, proceeds in excess of $1.0 million from an insurance settlement, or proceeds from a new debt agreement. Beginning with the year ended December 31, 2017, an additional prepayment may be due related to excess cash flow for the respective measurement periods. On October 5, 2017, in connection with our new corporate headquarters lease, we executed a standby letter of credit in the amount of $6.0 million. As a result, we had $1.5 million available under our revolving credit facility as of December 31, 2017. The outstanding balance of the term loan at December 31, 2016 and December 31, 2017 was $110 million and $70 million, respectively. There was no outstanding balance of the revolving line of credit at December 31, 2016 and 2017. The Company was in compliance with all applicable covenants as of December 31, 2016 and 2017. 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 years ending December 31, 2017. The Company has 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 are being amortized to interest expense over the life of the debt on a straight-line basis, which approximates the interest method. Amortization of debt issuance costs for existing loan and security agreement for the years ended December 31, 2015, 2016 and 2017 was approximately $0.1 million, $0.7 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 includes unamortized debt issuance costs of approximately $1.8 million included in long-term debt. Aggregate maturities of the Company’s debt at December 31, 2017 are as follows: (In thousands) 2018 $ — 2019 116 2020 — 2021 70,000 2022 — Total debt $ 70,116 Less: deferred financing costs (1,787 ) Long-term debt, net $ 68,329 Less: current portion — Long term debt $ 68,329

Related Party Transactions

Related Party Transactions	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	6. Related Party Transactions During the six months ended June 30, 2017, the Company engaged in ordinary sales transactions of $93,000 and purchase transactions of $559,000 with entities affiliated with its controlling entity. During the six months ended June 30, 2018, the Company engaged in ordinary sales transactions of $194,000 and purchase transactions of $310,000 with entities affiliated with its controlling entity. At December 31, 2017 and June 30, 2018, the accompanying condensed consolidated balance sheets included accounts receivable balance of $516,000 and $0, respectively, and immaterial accounts payable balances. In September 2014, the Company entered into an advisory services agreement (the “Consulting Agreement”) with its controlling entity. The Consulting Agreement requires quarterly payments from September 8, 2014 through December 31, 2018 for business consulting services provided by the controlling entity to the Company. Consulting fees from the Consulting Agreement totaled $625,000 in the six months ended June 30, 2017 and were included in general and administrative expenses in the accompanying condensed 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.	9. Related Party Transactions At December 31, 2015, in connection with the final settlement of the SailPoint Technologies, Inc. acquisition, the Company incurred a payable to its controlling entity totaling $459,401. As of December 31, 2016, the payable to its controlling entity of $459,401 had been converted to additional paid in capital. 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. The remaining balances of these agreements as of December 31, 2016 and 2017 are included in the accompanying consolidated balance sheet as prepayments and other current assets and other non-current assets for the respective periods of $0 and $0 and $319,000 and $101,000 respectively. As of December 31, 2017, the balances for these agreements were forgiven during the fourth quarter of 2017. Throughout 2015, 2016 and 2017 the Company engaged in ordinary sales transactions of $59,000 $37,000, $858,000 and purchase transactions of $39,000, $313,000, and $942,000 respectively, with entities affiliated with its controlling entity. At December 31, 2016 and 2017, the accompanying consolidated balance sheets included accounts payable balances of $5,000 and $3,400, as well as accounts receivable balances $0 and $516,000, respectively, associated with these transactions. 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 $750,000, $1.0 million and $1.1 million in the years ended December 31, 2015, 2016 and 2017, respectively, and are included in general and administrative expenses on the accompanying consolidated statements of operations. Upon completion of the initial public offering, the Consulting Agreement ceased, and the Company is no longer required to make future payments.

Stock Option Plans and Stock-Ba

Stock Option Plans and Stock-Based Compensation	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Option Plans and Stock-Based Compensation	7. 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”), and restricted stock to purchase shares of common stock. 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 June 30, 2018, 497,868 shares were available for issuance under the Amended and Restated 2015 Stock Option and Grant Plan. At June 30, 2018, 132,202 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”). As of December 31, 2017, 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 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 June 30, 2018, 6,441,482 shares were available for issuance under the 2017 Plan. The Company currently uses authorized and unissued shares to satisfy share award exercises. In November 2017, the Company’s board of directors adopted the Employee Stock Purchase Plan (the “ESPP”). The ESPP became effective on in November of 2017, after the date our registration statement was declared effective by the SEC. As of June 30, 2018, the participation in the ESPP is not effective and no shares were purchased. Options Activity The fair value for the Company’s stock options granted during the year ended June 30, 2017 and 2018 was estimated at the date of grant using a Black Scholes option-pricing model using the following weighted average assumptions: June 30, 2017 June 30, 2018 Expected dividend rate 0% 0% Expected volatility 49% 40.0% - 41.1% Risk-free interest rate 2.11% - 2.11% 2.63% - 2.91% Expected term (in years) 6.25 6.25 The following table summarizes option activity under the 2017 Plan and related information: Number of Options Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value Balances at December 31, 2017 3,500,075 $ 5.43 8.8 31,784,488 Granted 50,879 $ 20.81 Exercised (365,111 ) $ 2.45 Forfeited (82,907 ) $ 2.78 Balances at June 30, 2018 3,102,936 $ 6.11 8.3 57,188,986 Options vested and expected to vest at June 30, 2018 3,102,936 $ 6.11 8.3 57,188,986 Options vested and exercisable at June 30, 2018 830,912 $ 2.33 7.3 18,455,289 The Company expects all outstanding stock options at June 30, 2018 to fully vest. The weighted average grant date fair value per share for the period ended June 30, 2017 and 2018 was $1.64 and $9.19, respectively. Compensation expense relating to stock options was approximately $0.3 million for the six months ended June 30, 2017 and approximately $2.5 million for the six months ended June 30, 2018. The total fair value of shares vested during the six months ended June 30, 2017 was approximately $0.2 million; and during the six months ended June 30, 2018 was approximately $0.6 million. As of June 30, 2017, the total unrecognized compensation expense related to non-vested stock options granted was $1.4 million and was expected to be recognized over a weighted average period of 2.78 years. As of June 30, 2018, the total unrecognized compensation expense related to non-vested stock options granted is $9.2 million and is expected to be recognized over a weighted average period of 2.51 years. 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 are subject to the Company’s right to repurchase until vested. Upon vesting, the incentive units automatically convert to unrestricted common stock. Prior to modification, 50% of incentive units granted to executives vested 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. In 2017, the Board of Directors waived the EBITDA criteria associated with the annual tranche of performance vesting stock options resulting in a modification. The Company did not grant any incentive units during the first half of 2018. As of June 30, 2018, the aggregate intrinsic value of 994,173 non-vested incentive units was $24.4 million, and the total unrecognized compensation related to non-vested incentive units granted was approximately $4.7 million and is expected to be recognized over a weighted-average remaining period of 0.5 years. During the second quarter of 2018, approximately 253,000 units vested. During the first half of 2018, approximately 1.2 million units vested. Stock based compensation expense relating to incentive units was approximately $21,000 for the six months ended June 30, 2017, and $4.3 million for the six months ended June 30, 2018. Restricted Stock Units The Company granted 423,413 restricted stock units during the six months ended June 30, 2018. As of June 30, 2018, 1,245,609 units of restricted stock are expected to vest over a weighted average remaining contractual period of 2.0 years with an aggregate intrinsic value of approximately $30.6 million. The total unrecognized compensation related to restricted stock units was $14.9 million as of June 30, 2018 and is expected to be recognized over a weighted average period of 3.47 years. Stock based compensation expense relating to restricted stock units was approximately $0.0 million for six months ended June 30, 2017, and $2.5 million for the six months ended June 30, 2018. Stock-based compensation expense, which includes stock options, restricted stock units and incentive units, was recognized as follows: Six Months Ended June 30, 2017 2018 (In thousands) Cost of revenue—subscription $ 18 $ 374 Cost of revenue—services and other 38 722 Research and development 65 1,293 General and administrative 75 4,035 Sales and marketing 147 2,831 Total stock-based compensation expense $ 343 $ 9,255	11. 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”), and restricted stock to purchase shares of common stock. 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, 2017, 425,112 shares were available for issuance under the Amended and Restated 2015 Stock Option and Grant Plan. At December 31, 2017, 123,105 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”). As of December 31, 2017, 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 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, 2017, 6,890,082 shares were available for issuance under the 2017 Plan. The Company currently uses authorized and unissued shares to satisfy share award exercises. In November 2017, the Company’s board of directors adopted the Employee Stock Purchase Plan (the “ESPP”). The ESPP became effective on in November of 2017, after the date our registration statement was declared effective by the SEC. As of December 31, 2017, the participation in the ESPP has is not effective and no shares were purchased. The fair value for the Company’s stock options granted during the year ended December 31, 2015 was estimated at the date of grant using a Black Scholes option-pricing model with the following assumptions: Time Based Performance Expected dividend rate 0% 0% Expected volatility 48.4% 48.4% Risk-free interest rate 1.55% - 1.95% 1.68% - 1.93% Expected term (in years) 6.25 5.5 - 6.25 The fair value for the Company’s stock options granted during the year ended December 31, 2016 was estimated at the date of grant using a Black Scholes option-pricing model with the following assumptions: Time Based Performance Expected dividend rate 0% 0% Expected volatility 49% 49% Risk-free interest rate 1.31% - 2.24% 1.27% - 2.16% Expected term (in years) 5.5 - 6.25 5.75 - 6.4 The fair value for the Company’s stock options granted during the year ended December 31, 2017 was estimated at the date of grant using a Black Scholes option-pricing model with the following assumptions: Time Based Performance Expected dividend rate 0% 0% Expected volatility 40.9% - 49% 40.9% - 49% Risk-free interest rate 1.96% - 2.18% 1.96% - 2.18% Expected term (in years) 6.25 - 6.25 5.5 - 6.29 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, 2017 to fully vest. The weighted average grant date fair value per share for the year ended December 31, 2015, 2016 and 2017 was $1.15, $0.83 and $4.32, respectively. Compensation expense relating to stock options was approximately $160,000, $508,000 and $1.0 million for the years ended December 31, 2015, 2016 and 2017, respectively. The total fair value of shares vested during the years ended December 31, 2015, 2016 and 2017 was approximately $50,000, $571,000 and $323,000, respectively. The following table summarizes activity for service vesting stock options during the years ended December 31, 2015, 2016 and 2017: Number Weighted Weighted Aggregate Balances at December 31, 2014 — $ — Granted 1,349,782 $ 2.38 Forfeited (23,333 ) $ 2.42 Balances at December 31, 2015 1,326,449 $ 2.38 9.7 Options vested and expected to vest at December 31, 2015 1,326,449 $ 2.38 9.7 Options vested and exercisable at December 31, 2015 10,781 $ 2.42 9.7 Balances at December 31, 2015 1,326,449 $ 2.38 9.7 Granted 419,839 $ 1.69 Exercised (6,568 ) $ 1.77 $ 2,950 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 service based 591,892 $ 2.53 Exercised (152,330 ) $ 2.22 $ 1,871,041 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 The following table summarizes the status of the Company’s non-vested service vesting stock options for the years ended December 31, 2015, 2016 and 2017: Number Weighted Non-vested at December 31, 2014 — $ — Granted 1,349,782 $ 1.16 Vested (10,781 ) $ 1.17 Forfeited (23,333 ) $ 1.17 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 The total unrecognized compensation expense related to non-vested service vesting stock options granted is $10.7 million and is expected to be recognized over a weighted average period of 3.14 years as of December 31, 2017. The following table summarizes activity of performance vesting stock options for the years ended December 31, 2015, 2016 and 2017: Number Weighted Weighted Aggregate Balances at December 31, 2014 — $ — Granted 322,846 $ 2.32 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, 2015, 2016 and 2017, 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 16, 26 and 34 employees and resulted in incremental stock-based compensation expense of $37,000, $98,000 and $45,000 for the years ended December 31, 2015, 2016 and 2017, 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 changes during the year ended December 31, 2015, 2016 and 2017 are presented below: Number Weighted Non-vested at December 31, 2014 — Granted 322,846 $ 1.12 Vested (33,613 ) $ 1.12 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 vested performance to service 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”). Incentive units were issued subsequent to the SailPoint Technologies, Inc. acquisition discussed in Note 3 in the notes to the consolidated financial statements. 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 $194,000 and $116,000 at December 31, 2016 and 2017, respectively, and is included in long term debt. 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. A summary of the Company’s non-vested incentive unit activity as of December 31, 2017, changes during the year ended December 31, 2015, 2016 and 2017 are presented below: Number Weighted- Non-vested at December 31, 2014 7,080 $ 0.0517 Granted 170 $ 0.0517 Vested (1,193 ) $ 0.0517 Forfeited (531 ) $ 0.0517 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 Repurchased — $ — Forfeited (39 ) $ 0.0517 Non-vested at December 31, 2017 2,242 $ 0.0517 (1) The non-vested total from December 31, 2016 has been adjusted to include incentive units previously issued. The total unrecognized compensation related to non-vested incentive units granted is approximately $9.0 million and is expected to be recognized over a weighted-average period of 1.0 years as of December 31, 2017. The total intrinsic value of units unvested as of December 31, 2015, 2016 and 2017 was $5.7 million, $8.5 million and $32.5 million, respectively. Compensation expense relating to incentive units, including both service and performance vesting, was approximately $86,000, $60,000 and $3.2 million for the years ended December 31, 2015, 2016 and 2017, respectively. Stock-based compensation expense, which includes stock options, restricted stock units and incentive units, recognized was as follows: Year Ended December 31, 2015 2016 2017 (In thousands) Cost of revenue—subscription $ 12 $ 34 $ 133 Cost of revenue—services and other 20 63 458 Research and development 62 118 658 General and administrative 28 96 2,062 Sales and marketing 124 257 1,203 Total stock-based compensation $ 246 $ 568 $ 4,514 Restricted Stock Units During the year ended December 31, 2017, we awarded RSUs to certain employees, with a weighted-average grant date fair value of $12.18 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 year ended December 31, 2017: Number of Weighted Aggregate Balances at December 31, 2016 — Granted 897,284 Vested — Forfeited — Balances at December 31, 2017 897,284 9.9 $ 186 Units vested and expected to vest at December 31, 2017 897,284 9.9 $ 186 The total unrecognized compensation related to restricted stock units is $10.6 million for December 31, 2017 and is expected to be recognized over a weighted average period of 3.88 years. A summary of the Company’s non-vested incentive unit activity as of December 31, 2017 is as follows: Number of Weighted Non-vested at December 31, 2016 — $ — Granted 897,284 12.18 Vested — — Forfeited — — Non-vested at December 31, 2017 897,284 $ 12.18

Income Taxes

Income Taxes	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	8. Income Taxes Impacts of the U.S. 2017 Tax Cuts and Jobs Act The U.S. 2017 Tax Cuts and Jobs Act (the “Act”), which was signed into law on December 22, 2017 and effective January 1, 2018, reduces the U.S. federal corporate tax rate from 35% to 21%. There was no net impact to the Company’s provision for income taxes due to the Company’s valuation allowance. The decrease in future tax assets via the reduced rate was offset by the decrease in our valuation allowance. The Act subjects a U.S. shareholder to tax on global intangible low-taxed income (“GILTI”) earned by certain foreign subsidiaries. The FASB Staff Q&A, Topic 740, No. 5, Accounting for GILTI The provision for income taxes for 2017 and 2018 is generated from activity in certain foreign jurisdictions by our consolidated subsidiaries and certain state and local jurisdictions. The Company’s practice is to recognize interest and/or penalties related to income tax matters in income tax expense. During the six months ended June 30, 2017 and 2018 the Company did not record any material interest or penalties. The effective tax rate for the six months ended June 30, 2017 is 2.4% compared to 7.3% for the six months ended June 30, 2018. 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 2014 and is no longer subject to state, local and foreign income tax examinations by tax authorities for years before 2012. The Company is currently under audit for sales and use tax in a single domestic jurisdiction and income tax audit in a single foreign jurisdiction. Both audits are in their initial stages and are immaterial.	14. 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 provides 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 shareholder’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’s selection of an accounting policy with respect to the new GILTI provisions will depend, in part, on analyzing its global income to determine whether it expects to have future U.S. inclusions in taxable income related to GILTI and, if so, what the impact is expected to be. Whether the Company expects to have future U.S. inclusions in taxable income related to GILTI depends on not only the Company’s current structure and estimated future results of global operations, but also its intent and ability to modify its structure. The Company is currently in the process of analyzing its structure and, as a result, is not yet able to reasonably estimate the effect of this provision of the TCJA. Therefore, the Company has not made any adjustments related to potential GILTI tax in its financial statements and has not made a policy decision regarding whether it will use the period cost or deferred method. Income Taxes The provision for income taxes for 2015, 2016 and 2017 is related to the profits generated in certain foreign jurisdictions by our consolidated subsidiaries. The following table presents consolidated loss before provision for income taxes as follows: Year Ended December 31, 2015 2016 2017 (In thousands) Domestic $ (14,727 ) $ (2,435 ) $ (2,780 ) Foreign 1,306 (2,723 ) (2,519 ) Total loss before income taxes $ (13,421 ) $ (5,158 ) $ (5,299 ) The provision for income taxes consisted of: Year Ended December 31, 2015 2016 2017 (In thousands) Current Federal $ — $ — $ 293 State 8 21 189 Foreign 704 531 1,997 Total current 712 552 2,479 Deferred Federal (3,222 ) (1,315 ) (293 ) State (99 ) (118 ) 202 Foreign (5 ) (1,104 ) (95 ) Total deferred (3,326 ) (2,537 ) (186 ) (Benefit) provision $ (2,614 ) $ (1,985 ) $ 2,293 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, 2016 2017 (In thousands) Deferred tax assets: Research and development and other credits $ 5,235 $ 6,187 Net operating loss carryforward 26,867 14,795 Charitable contributions 11 — Deferred revenue 1,115 1,355 Stock compensation 17 125 Accrued expense 1,346 1,323 Depreciable and amortizable assets 368 29 Other — 228 Total deferred tax assets 34,959 24,042 Deferred tax liabilities: Prepaid expenses (1,389 ) (1,249 ) Intangibles (32,751 ) (17,232 ) Total deferred tax assets, net 819 5,561 Less valuation allowance for deferred tax assets (486 ) (5,297 ) Net deferred tax assets $ 333 $ 264 As of December 31, 2015, 2016 and 2017, the Company had federal net operating loss carryforwards of approximately $78.5 million and $72.4 million, and $57.8 million, respectively, and research and development credits of approximately $2.7 million, $3.4 million, and $4.2 million, respectively, which will begin to expire beginning in 2024 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 of 1986. As of December 31, 2016, the Company’s reversing taxable temporary differences exceeded the Company’s deferred tax assets in certain foreign jurisdictions. Thus, management determined that it was more likely than not that the benefit associated with its deferred tax assets would be realized in that foreign jurisdiction. As of December 31, 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, no valuation allowance was recorded for December 31, 2016 and a valuation allowance totaling $1.7 million was recorded as of December 31, 2017. Given the Company’s lack of earnings history in the U.S., 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 in the U.S., except for a portion of certain state tax credits that management determined were more likely than not to be realized. Thus, a valuation allowance totaling $0.5 million and $3.6 million was recorded as of December 31, 2016 and 2017, respectively, 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 benefit (expense) amount computed by applying the statutory federal income tax rate of 34% 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, 2015, 2016 and 2017. The following table reconciles the Company’s effective tax rate to the federal statutory tax rate: Year Ended December 31, 2015 2016 2017 U.S. federal taxes at statutory rate 34.0 % 34.0 % 34.0 % Foreign tax rate differentials (0.7 ) (11.8 ) (9.1 ) Research and development credit 1.8 18.2 17.8 Foreign tax credit 3.9 4.7 18.3 Stock options (1.1 ) (3.8 ) (23.6 ) Permanent differences and other (5.3 ) (7.8 ) (14.4 ) State taxes, net of federal benefit 2.8 (0.1 ) (4.0 ) Change in state rate (11.6 ) 7.3 (1.9 ) Change in other valuation allowance due to operations 0.4 (1.9 ) (58.4 ) Other 4.7 (0.3 ) (2.0 ) Total income tax benefit (expense) 19.5 % 38.5 % (43.3 )% The reconciliation of unrecognized tax benefits at the beginning and end of the year is as follows (in thousands): Balance at December 31, 2014 $ 320 Additions based on tax positions related to prior year 366 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 Beginning December 31, 2014, 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, 2015, 2016 and 2017 is $0.7 million, $0.9 million and $1.9 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, 2015, 2016 and 2017 the Company did not record any material interest or penalties. The Company files tax returns in the U.S. federal jurisdiction, in several state jurisdictions, and in several foreign jurisdictions. The Company is no longer subject to U.S. federal income tax examinations for years before 2013 and is no longer subject to state, local and foreign income tax examinations by tax authorities for years before 2012. The Company is not currently under audit in any jurisdiction.

Net Loss Per Share Attributable

Net Loss Per Share Attributable to Common Shareholders	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net Loss Per Share Attributable to Common Shareholders	9. Net Loss Per Share Attributable to Common Shareholders Basic and diluted net loss per share is computed by dividing net loss attributable to common shareholders by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is calculated using our weighted-average outstanding common shares including the dilutive effect of stock awards. In periods when the Company recognizes a net loss, the Company excludes the impact of outstanding stock awards from the diluted loss per share calculation as their inclusion would have an antidilutive effect. The following table sets forth the calculation of basic and diluted net loss per share during the periods presented: Six Months Ended June 30, 2017 2018 (In thousands, except share data) Numerator: Net loss $ (6,587 ) $ (11,614 ) Deemed dividends to preferred stockholders (12,590 ) — Net loss attributable to common shareholders $ (19,177 ) $ (11,614 ) Denominator: Weighted average shares outstanding Basic and diluted 47,567,048 85,984,103 Net loss attributable to common shareholders Basic and diluted $ (0.40 ) $ (0.14 ) The following weighted average outstanding shares of common stock equivalents were excluded from the computation of the diluted net loss per share attributable to common shareholders for the periods presented because their effect would have been anti-dilutive. For the period prior to our initial public offering, convertible preferred stock is not included in this computation as it was contingently convertible based upon a future event. Six Months Ended June 30, 2017 2018 Stock options to purchase common stock 2,194,152 3,391,821 RSUs issued and outstanding — 1,189,385 Non-vested incentive units 3,309,772 1,288,022 Total 5,503,924 5,869,228	15. Net loss per share attributable to common shareholders The following table sets forth the calculation of basic and diluted net loss per share during the periods presented: Year Ended December 31, 2015 2016 2017 (In thousands, except share data) Numerator: Net loss $ (10,807 ) $ (3,173 ) $ (7,592 ) Deemed dividends to preferred stockholders (21,597 ) (23,618 ) (21,129 ) Net loss attributable to common shareholders $ (32,404 ) $ (26,791 ) $ (28,721 ) Denominator: Weighted average shares outstanding used in computing net loss per share Basic 43,929,159 45,933,218 52,339,804 Diluted 43,929,159 45,933,218 52,339,804 Net loss attributable to common shareholders Basic $ (0.74 ) $ (0.58 ) $ (0.55 ) Diluted $ (0.74 ) $ (0.58 ) $ (0.55 ) The following weighted average outstanding shares of common stock equivalents were excluded from the computation of the diluted net 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 10): Year Ended December 31, 2015 2016 2017 Convertible preferred stock on an as-if converted basis Stock options to purchase common stock 495,315 1,799,632 2,402,225 RSUs issued and outstanding — — 105,404 Non-vested incentive units 7,307,787 4,931,760 2,915,228 Total 7,803,102 6,731,392 5,422,857

Business Combination

Business Combination	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Business Combination	3. Business Combination Whitebox Security Ltd. On July 15, 2015, Whitebox Security Ltd. was acquired in exchange for total consideration of approximately $16 million. The acquisition was funded by borrowings under the Company’s revolving loan facility and cash on hand. Assets acquired, and liabilities assumed The Company recorded the transaction using the acquisition method of accounting which requires that assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date. The values outlined below represent the Company’s estimates of fair value as of the acquisition date: (In thousands) Cash and cash equivalents $ 458 Accounts receivable 423 Prepaid expenses and other assets 34 Deferred revenue contracts 162 Goodwill 10,485 Intangible assets 5,810 Total assets $ 17,372 Accounts payable $ (91 ) Accrued expenses (250 ) Deferred tax liability (1,202 ) Deferred revenue (162 ) Total liabilities $ (1,705 ) Total consideration $ 15,667 Total consideration, net of cash acquired $ 15,209 The fair values of the assets acquired and liabilities assumed were determined using various valuation techniques. Cash and cash equivalents, prepaid expenses, deposits, accounts payable, accrued expenses, and other liabilities were valued using a historical cost basis as this basis approximates fair value. Accounts receivable and other receivables have been recorded on a historical net basis, which approximates the fair value. Deferred revenue has been recorded based on an estimate of the fair market value of the services to be provided in connection with the associated contracts. Intangible assets Estimated Weighted Developed technology $ 5,000 7 Non-competition agreements and related items 810 4.4 Total acquired intangible assets other than goodwill $ 5,810 The intangible assets have been valued using variations of the income approach method which the Company determined were the most appropriate approach for the individual assets and which is considered a Level 3 valuation technique. Each of the intangible assets will be amortized over its estimated useful life. Goodwill Acquisition Costs

Property and Equipment, Net

Property and Equipment, Net	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Property and Equipment, Net	4. Property and Equipment, Net The cost and accumulated depreciation and amortization of property and equipment are as follows: As of December 31, 2016 2017 (In thousands) Property and equipment, net Computer equipment $ 2,618 $ 4,559 Other assets 528 833 Total property and equipment 3,146 5,392 Less: accumulated depreciation (1,291 ) (2,374 ) Total property and equipment, net $ 1,855 $ 3,018 Depreciation expense was $0.6 million, $0.9 million and $1.4 million for the years ended December 31, 2015, 2016 and 2017, respectively. There were no impairments of our property and equipment for the years ended December 31, 2015, 2016 and 2017.

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	5. 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, 2016 and December 31, 2017 as there has been no acquisition activity in these periods. All goodwill balances are subject to annual goodwill impairment testing. There were no impairments of goodwill during the years ended December 31, 2015, 2016 and 2017.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	6. Intangible Assets Total cost and amortization of intangible assets comprised of the following: As of December 31, Weighted Average 2016 2017 (In years) (In thousands) Intangible assets, net 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 related items 4.4 810 810 Total intangible assets 110,910 110,910 Less: Accumulated amortization (20,897 ) (29,725 ) Total intangible assets, net $ 90,013 $ 81,185 The amortization expense of the intangible assets was $9.1 million, $9.1 million and $8.8 million for the years ended December 31, 2015, 2016 and 2017, respectively. Amortization expense is included in the consolidated statements of operations for the years ended December 31, 2015, 2016 and 2017, respectively, as follows: General and administrative expenses of $64,000, $71,000 and $0, research and development expenses of $0 million, $0.2 million and $0.1, sales and marketing expenses of $5.0 million, $4.4 million and $4.3 million, license cost of revenue of $3.7 million, $4.0 million and $4.0 million and subscription cost of revenue of $0.4 million, $0.4 million and $0.4 million. Periodically, the Company evaluates intangible assets for possible impairment. There were no impairments for intangible assets during the years ended December 31, 2015, 2016 and 2017. The total estimated future amortization expense of these intangible assets as of December 31, 2017 is as follows: (In thousands) Year ending December 31, 2018 $ 8,825 2019 8,825 2020 8,825 2021 8,825 2022 8,825 Thereafter 37,060 Total amortization expense $ 81,185

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Stockholders' Equity	10. 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, 2017, 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. Redeemable convertible preferred stock consisted of the following (in thousands, except share amounts): As of Redeemable Date Issued Original Shares Shares Liquidation Dividend December 31, 2016 Series A September 2014 $ 1,000 500,000 223,987 $ 275,463 9 % December 31, 2017 Series A September 2014 $ 1,000 — — $ — 0 % 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 shareholders effective through December 15, 2016 and was primarily funded with the proceeds from the New Financing arrangement as noted in Note 8. 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. During the fourth quarter of 2017, all repurchased shares of treasury stock were retired.

Accrued Expenses and Other Liab

Accrued Expenses and Other Liabilities	12 Months Ended
	Dec. 31, 2017
Payables and Accruals [Abstract]
Accrued Expenses and Other Liabilities	12. Accrued Expenses and Other Liabilities Accrued expenses consisted of the following: As of December 31, 2016 2017 (In thousands) Commissions $ 4,943 $ 8,559 Bonus 2,895 5,063 Payroll and related benefits 988 2,640 Interest 794 34 Partner and customer programs 615 1,234 Sales and other taxes 615 1,373 Employee travel expenses 213 369 Consulting and professional services 188 339 Other 1,854 3,025 Total $ 13,105 $ 22,636

Prepayments and Other Assets

Prepayments and Other Assets	12 Months Ended
	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepayments and Other Assets	13. Prepayments and Other Assets Prepayments and other assets include the balance of prepaid expenses, prepaid rent, prepaid issuance costs, and other assets. The current portion of these assets is included in prepayments and other current assets and the non-current portion is included in other non-current assets, both of which are contained within the accompanying consolidated balance sheets. The current portion of prepayments and other current assets consisted of the following: As of December 31, 2016 2017 (In thousands) Prepaid expenses $ 2,783 $ 4,376 Prepaid insurance 447 660 Prepaid commissions 3,753 2,931 Other 711 2,046 Total $ 7,694 $ 10,013 Other non-current assets consisted of the following: As of December 31, 2016 2017 (In thousands) Prepaid expenses $ 546 $ 3,210 Deposits 115 222 Note receivable 319 — Other — 110 Total $ 980 $ 3,542

Geographic information and majo

Geographic information and major customers	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Geographic information and major customers	16. 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 maker 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, 2015 2016 2017 (In thousands) United States $ 63,440 $ 92,116 $ 134,676 EMEA (1) 20,770 25,668 33,097 Rest of the World (1) 11,146 14,628 18,283 Total revenue $ 95,356 $ 132,412 $ 186,056 (1) No single country represented more than 10% of consolidated revenue

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2017
Postemployment Benefits [Abstract]
Employee Benefit Plans	17. 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, 2017
Subsequent Events [Abstract]
Subsequent Events	18. Subsequent Events

Summary of Significant Accoun26

Summary of Significant Accounting Policies (Policies)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated interim financial statements have been prepared in accordance with Article 10 of Regulation S-X, “Interim Financial Statements” and the rules and regulations for Form 10-Q of the Securities and Exchange Commission (the “SEC”). Pursuant to those rules and regulations, the Company has condensed or omitted certain information and footnote disclosure it normally includes in its annual consolidated financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the balance sheet, statements of operations and the statements of cash flows for the interim periods but are not necessarily indicative of the results of operations to be anticipated for the full year ending December 31, 2018 or any future period. Our unaudited consolidated financial statements have been prepared in a manner consistent with the accounting principles described in our Company’s Annual Report on Form 10-K for the year ended December 31, 2017, which was filed with the SEC on March 19, 2018 (the “Annual Report”). These financial statements and accompanying notes should be read in conjunction with the consolidated financial statements and notes thereto in the Company’s Annual Report. All intercompany accounts and transactions have been eliminated in consolidation.	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 maker is its chief executive officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance and allocating resources.
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.	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 of December 31, 2016 2017 (In thousands) Cash and cash equivalents per balance sheet $ 18,214 $ 116,049 Restricted cash per balance sheet 58 78 Cash, cash equivalents and restricted cash per cash flow $ 18,272 $ 116,127
Segment Information and Concentration of Credit and Other Risks	Segment Information and Concentration of Credit and Other Risks Segment Information The Company operates as one operating segment. The Company’s chief operating decision maker is its chief executive officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance and allocating resources. 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 maker 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 tables sets forth the Company’s consolidated total revenue by geography: Six Months Ended June 30, 2017 2018 (In thousands) United States $ 53,020 $ 67,195 EMEA (1) 13,853 24,952 Rest of the World (1) 7,853 12,127 Total revenue $ 74,726 $ 104,274 (1) No single country represented more than 10% of our consolidated revenue.
Concentration of Credit and Other Risks	Concentration of Credit Risk 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. There is no concentration of credit risk for customers as no individual entity represented more than 10% of the balance in accounts receivable as of December 31, 2017 and June 30, 2018 or 10% of revenue for six months ended June 30, 2017 and 2018. The Company does not experience concentration of credit risk in foreign countries as no foreign country represents more than 10% of the Company’s condensed consolidated revenues or net assets.	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. There is no concentration of credit risk for customers as no individual entity represented more than 10% of the balance in accounts receivable as of December 31, 2016 and 2017 or 10% of revenue in the years ended December 31, 2015, 2016 and 2017. 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, 2015 2016 2017 (In thousands) United States $ 63,440 $ 92,116 $ 134,676 EMEA (1) 20,770 25,668 33,097 Rest of the World (1) 11,146 14,628 18,283 Total revenue $ 95,356 $ 132,412 $ 186,056 (1) No single country represented more than 10% of consolidated revenue
Significant Accounting Policies	Significant Accounting Policies There have been no significant changes to the Company’s significant accounting policies, which are discussed in Note 2 of “Notes to Consolidated Financial Statements” in the Annual Report.
Recently Issued Accounting Standards	Recently Issued Accounting Standards Not Yet Adopted Under the Jumpstart Our Business Startups Act (the “JOBS Act”), emerging growth companies can delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have elected to take advantage of the longer phase-in periods for the adoption of new or revised financial accounting standards under the JOBS Act until we are no longer an emerging growth company. In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No . , Revenue from Contracts with Customers (Topic 606) With the evaluation of ASC 606 adoption, the Company plans to adopt the standard under the modified retrospective method. The Company’s determination was made upon a number of factors such as the significance of the impact of the new standard on the Company’s financial results, system readiness, including that of software procured from third-party providers, and the Company’s ability to accumulate and analyze the information necessary to assess the impact on prior period financial statements, as necessary and earlier than expected loss of emerging growth company status. The Company will continue to evaluate and analyze all other aspects of ASC 606 that may impact it. The Company will adopt the new revenue standard for the annual reporting period ending December 31, 2018, using the modified retrospective transition method. Under this method, the Company elects to apply the cumulative effect method to contracts that are not complete as of the adoption date. The Company is continuing to finalize the impact of adopting the new revenue standard on its condensed consolidated financial statements and related disclosures, changes to its accounting policies and practices and controls to support the new revenue recognition standard. The Company has developed a project plan for this transition, which includes necessary changes to accounting policies, processes, internal controls, and system requirements and is progressing as planned. The Company expects to implement the plan in time to report in accordance with ASC 606 for the annual reporting period for the year ended December 31, 2018. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory In July 2017, the FASB issued ASU No. 2017-11, Earnings Per Share (Topic 260). Recently Adopted Accounting Standards In May 2017, the FASB issued ASU No. 2017-09, Compensation—Stock Compensation (Topic 718).	Recently Issued Accounting Standards Not Yet Adopted Under the Jumpstart Our Business Startups Act (the “JOBS Act”), emerging growth companies can delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have elected to take advantage of the longer phase-in periods for the adoption of new or revised financial accounting standards under the JOBS Act until we are no longer an emerging growth company. In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606) The Company currently plans to adopt using the full retrospective approach; however, a final decision regarding the adoption method has not been made at this time. The Company’s final determination will depend on a number of factors such as the significance of the impact of the new standard on the Company’s financial results, system readiness, including that of software procured from third-party providers, and the Company’s ability to accumulate and analyze the information necessary to assess the impact on prior period financial statements, as necessary. The Company is in the initial stages of its evaluation of the impact of the new standard on its accounting policies, and processes. The Company has assigned internal resources in addition to the engagement of third party service providers to assist in the evaluation. While the Company continues to assess all potential impacts under the new standard there may be the potential for significant impacts to the timing of recognition of professional services revenue, and contract acquisition costs, both with respect to the amounts that will be capitalized as well as the period of amortization. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory In May 2017, the FASB issued ASU No. 2017-09, Compensation—Stock Compensation (Topic 718). In July 2017, the FASB issued ASU No. 2017-011, Earnings Per Share (Topic 260). Recently Adopted Accounting Pronouncements In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements—Going Concern (Subtopic 205-40). This ASU defines management’s responsibility to evaluate whether there is substantial doubt about an organization’s ability to continue as a going concern and to provide related footnote disclosures. Prior to this ASU, GAAP lacked guidance about management’s responsibility to evaluate whether there is substantial doubt about the organization’s ability to continue as a going concern or to provide related footnote disclosures and all guidance was included in generally accepted auditing standards (“GAAS”). This guidance is effective for annual periods ending after December 15, 2016. Early adoption is permitted. This standard has been adopted beginning with the reporting period ended December 31, 2016. The adoption of ASU 2014-15 did not have a material effect on the Company’s consolidated financial statements and related disclosures, although it could have an impact on disclosures in future periods. In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): In April 2015, the FASB issued ASU No. 2015-03, Interest—Imputation of Interest (Subtopic 835-30)— Simplifying the Presentation of Debt Issuance Costs In April 2015, the FASB issued ASU No. 2015-05, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement In September 2015, the FASB issued ASU No. 2015-16 , Business Combinations (Topic 805 In November 2015, the FASB issued ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes In March 2016, the FASB issued ASU No. 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments—a consensus of the Emerging Issues Task Force Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force) In January 2017, the FASB issued ASU No. 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment
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 elements 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.
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, accrued expenses and related party payable approximate their fair values due to their short maturities. 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, 2016 and 2017.
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.
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 its carrying value over its fair value. Assets to be disposed of are reported at the lower of carrying value or net realizable value. There was no impairment of property and equipment during the years ended December 31, 2015, 2016 and 2017.
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, or more often if and when events or circumstances indicate that the carrying value may not be recoverable. Goodwill is tested using a two-step process. The first step 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. The second step of the goodwill impairment test, used to measure the amount of impairment loss, compares the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. If the carrying amount of reporting unit goodwill exceeds the implied fair value of that goodwill, an impairment loss shall be recognized 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. If the implied fair value of goodwill is less than the carrying value of goodwill, an impairment loss is recognized equal to the difference. There were no impairments of goodwill during the years ended December 31, 2015, 2016 and 2017. The Company elected to change the annual assessment date for goodwill and indefinite lived intangible assets from December 31st to October 31st because the change in date creates synergy and enhance the quality of our indefinite lived intangible assets impairment analysis. The Company conducted qualitative and quantitative assessment, for the 2017 annual impairment test, using the income, cost and market approach, using information as of October 31, 2017. The intent is to perform qualitative impairment test at least annually unless certain indicators or events suggest otherwise.
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, then 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 as of December 31, 2016 and 2017.
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 has substantially coincided. As a result, software development costs qualifying for capitalization have been insignificant. Therefore, we have not capitalized any software development costs through December 31, 2017. 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 loss is equal to net loss for all periods presented.
Liquidity		Liquidity The Company has sustained losses since its inception. The Company had cash, cash equivalents and restricted cash of approximately $116.1 million and an accumulated deficit of approximately $25.2 million at December 31, 2017. The Company has funded these losses through cash flows from operations, debt, issuance of common stock and other equity financings. The Company believes that working capital on hand, net operating cash flows, and increasing revenues are sufficient to sustain operations for at least the twelve months from the report issuance date.
Revenur Recognition		Revenue Recognition 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.
Deferred Revenue		Deferred Revenue Deferred revenue represents amounts from the sale of products that have been billed for, but the transaction has not met our revenue recognition criteria. Amounts are classified between current and long-term liabilities, based upon the expected period in which the revenue will be recognized. Customer advances and billed amounts due from customers in excess of revenue recognized are recorded as deferred revenue.
Cost of Revenue		Cost of Revenue Cost of revenue for license 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 $2.6 million, $4.2 million and $6.0 million for the years ended December 31, 2015, 2016 and 2017, respectively, and are included in sales and marketing expense.
Stock-Based Compensation		Stock-Based Compensation The Company measures stock-based compensation cost 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 expected term, fair value of common stock, expected volatility, 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. Compensation cost resulting from this valuation is recognized in the consolidated statement 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 option. The Company is required to estimate potential forfeitures of stock grants and adjust recorded compensation cost 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.
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 Loss Per Share		Net Loss Per Share Basic net loss per share attributable to common stockholders is calculated by dividing the net loss attributable to common stockholders for the period, defined as net 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, 2015, 2016 and 2017 excluded common stock equivalents because their inclusion would be anti-dilutive or would decrease the reported loss per share. 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 loss per share using the two-class method. Under the two-class method, basic and diluted net loss per share is determined by calculating net loss per share for common stock and participating securities based on the cash dividends paid and participation rights in undistributed earnings.

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Cost and Accumulated Amortization of Intangible Assets	Total cost and accumulated amortization of intangible assets is comprised of the following: Weighted Average Useful Life As of December 31, 2017 June 30, 2018 (In years) (In thousands) Intangible assets, net 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 related items 4.4 810 810 Total intangible assets 110,910 110,910 Less: Accumulated amortization (29,725 ) (34,137 ) Total intangible assets, net $ 81,185 $ 76,773
Summary of Amortization Expense Included in Condensed Consolidated Statements of Operations	Amortization expense of intangible assets was $4.4 million for the six months ended June 30, 2017, and was $4.4 million for the six months ended June 30, 2018. Amortization expense is included in the condensed consolidated statements of operations for the six months ended June 30, 2017 and 2018 as follows: Six Months Ended June 30, 2017 2018 (In thousands) Cost of revenue—license $ 2,016 $ 2,016 Cost of revenue—subscription 192 192 Research and development 81 68 Sales and marketing 2,139 2,136 Total amortization of acquired intangibles $ 4,428 $ 4,412	Total cost and amortization of intangible assets comprised of the following: As of December 31, Weighted Average 2016 2017 (In years) (In thousands) Intangible assets, net 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 related items 4.4 810 810 Total intangible assets 110,910 110,910 Less: Accumulated amortization (20,897 ) (29,725 ) Total intangible assets, net $ 90,013 $ 81,185

Net Loss Per Share Attributab28

Net Loss Per Share Attributable to Common Shareholders (Tables)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Schedule of Calculation of Basic and Diluted Net Loss Per Share	The following table sets forth the calculation of basic and diluted net loss per share during the periods presented: Six Months Ended June 30, 2017 2018 (In thousands, except share data) Numerator: Net loss $ (6,587 ) $ (11,614 ) Deemed dividends to preferred stockholders (12,590 ) — Net loss attributable to common shareholders $ (19,177 ) $ (11,614 ) Denominator: Weighted average shares outstanding Basic and diluted 47,567,048 85,984,103 Net loss attributable to common shareholders Basic and diluted $ (0.40 ) $ (0.14 )	The following table sets forth the calculation of basic and diluted net loss per share during the periods presented: Year Ended December 31, 2015 2016 2017 (In thousands, except share data) Numerator: Net loss $ (10,807 ) $ (3,173 ) $ (7,592 ) Deemed dividends to preferred stockholders (21,597 ) (23,618 ) (21,129 ) Net loss attributable to common shareholders $ (32,404 ) $ (26,791 ) $ (28,721 ) Denominator: Weighted average shares outstanding used in computing net loss per share Basic 43,929,159 45,933,218 52,339,804 Diluted 43,929,159 45,933,218 52,339,804 Net loss attributable to common shareholders Basic $ (0.74 ) $ (0.58 ) $ (0.55 ) Diluted $ (0.74 ) $ (0.58 ) $ (0.55 )
Weighted Average Outstanding Shares of Common Stock Equivalents Excluded from the Computation of the Diluted Net Loss per Share	The following weighted average outstanding shares of common stock equivalents were excluded from the computation of the diluted net loss per share attributable to common shareholders for the periods presented because their effect would have been anti-dilutive. For the period prior to our initial public offering, convertible preferred stock is not included in this computation as it was contingently convertible based upon a future event. Six Months Ended June 30, 2017 2018 Stock options to purchase common stock 2,194,152 3,391,821 RSUs issued and outstanding — 1,189,385 Non-vested incentive units 3,309,772 1,288,022 Total 5,503,924 5,869,228	The following weighted average outstanding shares of common stock equivalents were excluded from the computation of the diluted net 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 10): Year Ended December 31, 2015 2016 2017 Convertible preferred stock on an as-if converted basis Stock options to purchase common stock 495,315 1,799,632 2,402,225 RSUs issued and outstanding — — 105,404 Non-vested incentive units 7,307,787 4,931,760 2,915,228 Total 7,803,102 6,731,392 5,422,857

Summary of Significant Accoun29

Summary of Significant Accounting Policies (Tables)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
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 of December 31, 2016 2017 (In thousands) Cash and cash equivalents per balance sheet $ 18,214 $ 116,049 Restricted cash per balance sheet 58 78 Cash, cash equivalents and restricted cash per cash flow $ 18,272 $ 116,127
Summary of Consolidated Total Revenue by Geography	The following tables sets forth the Company’s consolidated total revenue by geography: Six Months Ended June 30, 2017 2018 (In thousands) United States $ 53,020 $ 67,195 EMEA (1) 13,853 24,952 Rest of the World (1) 7,853 12,127 Total revenue $ 74,726 $ 104,274 (1) No single country represented more than 10% of our consolidated revenue.	The following tables sets forth the Company’s consolidated total revenue by geography: Year Ended December 31, 2015 2016 2017 (In thousands) United States $ 63,440 $ 92,116 $ 134,676 EMEA (1) 20,770 25,668 33,097 Rest of the World (1) 11,146 14,628 18,283 Total revenue $ 95,356 $ 132,412 $ 186,056 (1) No single country represented more than 10% of consolidated revenue

Stock Option Plans and Stock-30

Stock Option Plans and Stock-Based Compensation (Tables)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Summary of Fair Value of Stock Options Estimated by Using Weighted Average Assumptions	The fair value for the Company’s stock options granted during the year ended June 30, 2017 and 2018 was estimated at the date of grant using a Black Scholes option-pricing model using the following weighted average assumptions: June 30, 2017 June 30, 2018 Expected dividend rate 0% 0% Expected volatility 49% 40.0% - 41.1% Risk-free interest rate 2.11% - 2.11% 2.63% - 2.91% Expected term (in years) 6.25 6.25	The fair value for the Company’s stock options granted during the year ended December 31, 2015 was estimated at the date of grant using a Black Scholes option-pricing model with the following assumptions: Time Based Performance Expected dividend rate 0% 0% Expected volatility 48.4% 48.4% Risk-free interest rate 1.55% - 1.95% 1.68% - 1.93% Expected term (in years) 6.25 5.5 - 6.25 The fair value for the Company’s stock options granted during the year ended December 31, 2016 was estimated at the date of grant using a Black Scholes option-pricing model with the following assumptions: Time Based Performance Expected dividend rate 0% 0% Expected volatility 49% 49% Risk-free interest rate 1.31% - 2.24% 1.27% - 2.16% Expected term (in years) 5.5 - 6.25 5.75 - 6.4 The fair value for the Company’s stock options granted during the year ended December 31, 2017 was estimated at the date of grant using a Black Scholes option-pricing model with the following assumptions: Time Based Performance Expected dividend rate 0% 0% Expected volatility 40.9% - 49% 40.9% - 49% Risk-free interest rate 1.96% - 2.18% 1.96% - 2.18% Expected term (in years) 6.25 - 6.25 5.5 - 6.29
Summary of Stock Option Activity	The following table summarizes option activity under the 2017 Plan and related information: Number of Options Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value Balances at December 31, 2017 3,500,075 $ 5.43 8.8 31,784,488 Granted 50,879 $ 20.81 Exercised (365,111 ) $ 2.45 Forfeited (82,907 ) $ 2.78 Balances at June 30, 2018 3,102,936 $ 6.11 8.3 57,188,986 Options vested and expected to vest at June 30, 2018 3,102,936 $ 6.11 8.3 57,188,986 Options vested and exercisable at June 30, 2018 830,912 $ 2.33 7.3 18,455,289	The following table summarizes activity for service vesting stock options during the years ended December 31, 2015, 2016 and 2017: Number Weighted Weighted Aggregate Balances at December 31, 2014 — $ — Granted 1,349,782 $ 2.38 Forfeited (23,333 ) $ 2.42 Balances at December 31, 2015 1,326,449 $ 2.38 9.7 Options vested and expected to vest at December 31, 2015 1,326,449 $ 2.38 9.7 Options vested and exercisable at December 31, 2015 10,781 $ 2.42 9.7 Balances at December 31, 2015 1,326,449 $ 2.38 9.7 Granted 419,839 $ 1.69 Exercised (6,568 ) $ 1.77 $ 2,950 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 service based 591,892 $ 2.53 Exercised (152,330 ) $ 2.22 $ 1,871,041 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
Summary of Stock-Based Compensation Expense	Stock-based compensation expense, which includes stock options, restricted stock units and incentive units, was recognized as follows: Six Months Ended June 30, 2017 2018 (In thousands) Cost of revenue—subscription $ 18 $ 374 Cost of revenue—services and other 38 722 Research and development 65 1,293 General and administrative 75 4,035 Sales and marketing 147 2,831 Total stock-based compensation expense $ 343 $ 9,255	Stock-based compensation expense, which includes stock options, restricted stock units and incentive units, recognized was as follows: Year Ended December 31, 2015 2016 2017 (In thousands) Cost of revenue—subscription $ 12 $ 34 $ 133 Cost of revenue—services and other 20 63 458 Research and development 62 118 658 General and administrative 28 96 2,062 Sales and marketing 124 257 1,203 Total stock-based compensation $ 246 $ 568 $ 4,514
summary of Non-vested Service Vesting Stock Options		The following table summarizes the status of the Company’s non-vested service vesting stock options for the years ended December 31, 2015, 2016 and 2017: Number Weighted Non-vested at December 31, 2014 — $ — Granted 1,349,782 $ 1.16 Vested (10,781 ) $ 1.17 Forfeited (23,333 ) $ 1.17 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
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 changes during the year ended December 31, 2015, 2016 and 2017 are presented below: Number Weighted Non-vested at December 31, 2014 — Granted 322,846 $ 1.12 Vested (33,613 ) $ 1.12 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 vested performance to service based (322,988 ) $ 11.95 Non-vested at December 31, 2017 — $ —
Summary of Restricted Stock Unit Activity		The following provides a summary of the restricted stock unit activity for the Company for the year ended December 31, 2017: Number of Weighted Aggregate Balances at December 31, 2016 — Granted 897,284 Vested — Forfeited — Balances at December 31, 2017 897,284 9.9 $ 186 Units vested and expected to vest at December 31, 2017 897,284 9.9 $ 186
Performance Shares
Summary of Stock Option Activity		The following table summarizes activity of performance vesting stock options for the years ended December 31, 2015, 2016 and 2017: Number Weighted Weighted Aggregate Balances at December 31, 2014 — $ — Granted 322,846 $ 2.32 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 — $ — — $ —
Incentive Unit Plan
summary of Non-vested Service Vesting Stock Options		A summary of the Company’s non-vested incentive unit activity as of December 31, 2017, changes during the year ended December 31, 2015, 2016 and 2017 are presented below: Number Weighted- Non-vested at December 31, 2014 7,080 $ 0.0517 Granted 170 $ 0.0517 Vested (1,193 ) $ 0.0517 Forfeited (531 ) $ 0.0517 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 Repurchased — $ — Forfeited (39 ) $ 0.0517 Non-vested at December 31, 2017 2,242 $ 0.0517 (1) The non-vested total from December 31, 2016 has been adjusted to include incentive units previously issued.
Summary of Non-Vested Incentive activity		A summary of the Company’s non-vested incentive unit activity as of December 31, 2017 is as follows: Number of Weighted Non-vested at December 31, 2016 — $ — Granted 897,284 12.18 Vested — — Forfeited — — Non-vested at December 31, 2017 897,284 $ 12.18

Business Combination (Tables)

Business Combination (Tables)	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Summary of Fair Values of Assets Acquired and Liabilities Assumed at Acquisition Date	The values outlined below represent the Company’s estimates of fair value as of the acquisition date: (In thousands) Cash and cash equivalents $ 458 Accounts receivable 423 Prepaid expenses and other assets 34 Deferred revenue contracts 162 Goodwill 10,485 Intangible assets 5,810 Total assets $ 17,372 Accounts payable $ (91 ) Accrued expenses (250 ) Deferred tax liability (1,202 ) Deferred revenue (162 ) Total liabilities $ (1,705 ) Total consideration $ 15,667 Total consideration, net of cash acquired $ 15,209
Summary of Acquired Finite-Lived Intangible Assets	the following table summarizes the fair value estimates of the identifiable intangible assets and their estimated useful lives: Estimated Weighted Developed technology $ 5,000 7 Non-competition agreements and related items 810 4.4 Total acquired intangible assets other than goodwill $ 5,810

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment	The cost and accumulated depreciation and amortization of property and equipment are as follows: As of December 31, 2016 2017 (In thousands) Property and equipment, net Computer equipment $ 2,618 $ 4,559 Other assets 528 833 Total property and equipment 3,146 5,392 Less: accumulated depreciation (1,291 ) (2,374 ) Total property and equipment, net $ 1,855 $ 3,018

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Estimated Future Amorization of Intangible Aseets	The total estimated future amortization expense of these intangible assets as of December 31, 2017 is as follows: (In thousands) Year ending December 31, 2018 $ 8,825 2019 8,825 2020 8,825 2021 8,825 2022 8,825 Thereafter 37,060 Total amortization expense $ 81,185

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments	Future minimum annual lease payments under these non-cancelable operating leases, inclusive of sublease proceeds, as of December 31, 2017 are as follows: (In thousands) Year ending December 31, 2018 $ 2,785 2019 3,004 2020 4,445 2021 4,997 2022 4,921 Thereafter 32,127 Total minimum lease payments $ 52,279

Line of Credit and Long-Term 35

Line of Credit and Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2017
Line Of Credit Facility [Abstract]
Schedule of Aggregate Maturities of Long-Term Debt	Aggregate maturities of the Company’s debt at December 31, 2017 are as follows: (In thousands) 2018 $ — 2019 116 2020 — 2021 70,000 2022 — Total debt $ 70,116 Less: deferred financing costs (1,787 ) Long-term debt, net $ 68,329 Less: current portion — Long term debt $ 68,329

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Schedule of Redeemable Convertible Preferred Stock	Redeemable convertible preferred stock consisted of the following (in thousands, except share amounts): As of Redeemable Date Issued Original Shares Shares Liquidation Dividend December 31, 2016 Series A September 2014 $ 1,000 500,000 223,987 $ 275,463 9 % December 31, 2017 Series A September 2014 $ 1,000 — — $ — 0 %

Accrued Expenses and Other Li37

Accrued Expenses and Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2017
Payables and Accruals [Abstract]
Schedule of Accrued Expenses	Accrued expenses consisted of the following: As of December 31, 2016 2017 (In thousands) Commissions $ 4,943 $ 8,559 Bonus 2,895 5,063 Payroll and related benefits 988 2,640 Interest 794 34 Partner and customer programs 615 1,234 Sales and other taxes 615 1,373 Employee travel expenses 213 369 Consulting and professional services 188 339 Other 1,854 3,025 Total $ 13,105 $ 22,636

Prepayments and Other Assets (T

Prepayments and Other Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Current Portion of Prepayments and Other Current Assets	The current portion of prepayments and other current assets consisted of the following: As of December 31, 2016 2017 (In thousands) Prepaid expenses $ 2,783 $ 4,376 Prepaid insurance 447 660 Prepaid commissions 3,753 2,931 Other 711 2,046 Total $ 7,694 $ 10,013
Schedule of Other Non-current Assets	Other non-current assets consisted of the following: As of December 31, 2016 2017 (In thousands) Prepaid expenses $ 546 $ 3,210 Deposits 115 222 Note receivable 319 — Other — 110 Total $ 980 $ 3,542

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Summary of Consolidated Loss Before Provision for Income Taxes	The following table presents consolidated loss before provision for income taxes as follows: Year Ended December 31, 2015 2016 2017 (In thousands) Domestic $ (14,727 ) $ (2,435 ) $ (2,780 ) Foreign 1,306 (2,723 ) (2,519 ) Total loss before income taxes $ (13,421 ) $ (5,158 ) $ (5,299 )
Summary of Provision for Income Taxes consisted	The provision for income taxes consisted of: Year Ended December 31, 2015 2016 2017 (In thousands) Current Federal $ — $ — $ 293 State 8 21 189 Foreign 704 531 1,997 Total current 712 552 2,479 Deferred Federal (3,222 ) (1,315 ) (293 ) State (99 ) (118 ) 202 Foreign (5 ) (1,104 ) (95 ) Total deferred (3,326 ) (2,537 ) (186 ) (Benefit) provision $ (2,614 ) $ (1,985 ) $ 2,293
Net Tax Effects of Temporary Differences between the Carring Amount of Significant Components of Deferred Tax Assets and Deferred Tax Liab	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, 2016 2017 (In thousands) Deferred tax assets: Research and development and other credits $ 5,235 $ 6,187 Net operating loss carryforward 26,867 14,795 Charitable contributions 11 — Deferred revenue 1,115 1,355 Stock compensation 17 125 Accrued expense 1,346 1,323 Depreciable and amortizable assets 368 29 Other — 228 Total deferred tax assets 34,959 24,042 Deferred tax liabilities: Prepaid expenses (1,389 ) (1,249 ) Intangibles (32,751 ) (17,232 ) Total deferred tax assets, net 819 5,561 Less valuation allowance for deferred tax assets (486 ) (5,297 ) Net deferred tax assets $ 333 $ 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, 2015 2016 2017 U.S. federal taxes at statutory rate 34.0 % 34.0 % 34.0 % Foreign tax rate differentials (0.7 ) (11.8 ) (9.1 ) Research and development credit 1.8 18.2 17.8 Foreign tax credit 3.9 4.7 18.3 Stock options (1.1 ) (3.8 ) (23.6 ) Permanent differences and other (5.3 ) (7.8 ) (14.4 ) State taxes, net of federal benefit 2.8 (0.1 ) (4.0 ) Change in state rate (11.6 ) 7.3 (1.9 ) Change in other valuation allowance due to operations 0.4 (1.9 ) (58.4 ) Other 4.7 (0.3 ) (2.0 ) Total income tax benefit (expense) 19.5 % 38.5 % (43.3 )%
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, 2014 $ 320 Additions based on tax positions related to prior year 366 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

Geographic information and ma40

Geographic information and major customers (Tables)	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Geographic information and major customers	The following are a summary of consolidated revenues within geographic areas: Year Ended December 31, 2015 2016 2017 (In thousands) United States $ 63,440 $ 92,116 $ 134,676 EMEA (1) 20,770 25,668 33,097 Rest of the World (1) 11,146 14,628 18,283 Total revenue $ 95,356 $ 132,412 $ 186,056 (1) No single country represented more than 10% of consolidated revenue

Summary of Significant Accoun41

Summary of Significant Accounting Policies - Summary of Consolidated Total Revenue by Geography (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Summary of Significant Accounting Policies [Line Items]
Total revenue	$ 104,274	$ 74,726	$ 186,056	$ 132,412	$ 95,356
United States
Summary of Significant Accounting Policies [Line Items]
Total revenue	67,195	53,020	134,676	92,116	63,440
EMEA
Summary of Significant Accounting Policies [Line Items]
Total revenue	24,952	13,853	33,097	25,668	20,770
Rest of the World
Summary of Significant Accounting Policies [Line Items]
Total revenue	$ 12,127	$ 7,853	$ 18,283	$ 14,628	$ 11,146

Goodwill and Intangible Asset42

Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 219,377,000	$ 219,400,000	$ 219,377,000	$ 219,377,000
Goodwill, acquired during period	0	0	0	0
Goodwill, impairment loss	0	0	0	0	$ 0
Total amortization of acquired intangibles	4,412,000	4,428,000	8,800,000	9,100,000	9,100,000
Impairment of intangible assets	$ 0	$ 0	$ 0	$ 0	$ 0

Goodwill and Intangible Asset43

Goodwill and Intangible Assets - Schedule of Cost and Accumulated Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 110,910	$ 110,910	$ 110,910
Less: Accumulated amortization	(34,137)	(29,725)	(20,897)
Total intangible assets, net	$ 76,773	$ 81,185	$ 90,013
Customer Lists
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	15 years	15 years	15 years
Intangible assets, gross	$ 42,500	$ 42,500	$ 42,500
Developed Technology
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	9 years 7 months 6 days	9 years 7 months 6 days	9 years 7 months 6 days
Intangible assets, gross	$ 42,000	$ 42,000	$ 42,000
Trade Names and Trademarks
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	17 years	17 years	17 years
Intangible assets, gross	$ 24,500	$ 24,500	$ 24,500
Order Backlog
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	1 year 6 months	1 year 6 months	1 year 6 months
Intangible assets, gross	$ 1,100	$ 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	4 years 4 months 24 days	4 years 4 months 24 days
Intangible assets, gross	$ 810	$ 810	$ 810

Goodwill and Intangible Asset44

Goodwill and Intangible Assets - Summary of Amortization Expense Included in Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	$ 4,412	$ 4,428	$ 8,800	$ 9,100	$ 9,100
Cost of Revenue – License
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	2,016	2,016	4,000	4,000	3,700
Cost of Revenue – Subscription
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	192	192	400	400	400
Research and Development
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	68	81	100	200	0
Sales and Marketing
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	$ 2,136	$ 2,139	$ 4,300	$ 4,400	$ 5,000

Stock Option Plans and Stock-45

Stock Option Plans and Stock-Based Compensation - Summary of Stock Option Activity (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 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		1,592,370	419,839	1,349,782
Number of Options, Exercised		(152,330)	(6,568)
Number of Options, Forfeited		(153,975)	(117,602)	(23,333)
Number of Options, Ending balances		3,500,075	1,622,118	1,326,449
Number of Options, Options vested and expected to vest		3,500,075	1,622,118	1,326,449
Number of Options, Options vested and exercisable		926,614	416,265	10,781
Weighted Average Exercise Price Per share, Beginning balances	$ 5.43	$ 2.21	$ 2.38
Weighted Average Exercise Price (per share), Granted		9.54	1.69	$ 2.38
Weighted Average Exercise Price (per share), Exercised		2.22	1.77
Weighted Average Exercise Price (per share), Forfeited		2.21	2.31	2.42
Weighted Average Exercise Price (per share), Ending balances		5.43	2.21	2.38
Weighted Average Exercise Price (per share), Options vested and expected to vest		5.43	2.21	2.38
Weighted Average Exercise Price (Per share), Options vested and exercisable		$ 2.28	$ 2.36	$ 2.42
Weighted Average Remaining Contractual Term (years)		8 years 9 months 18 days	8 years 10 months 25 days	9 years 8 months 12 days
Weighted Average Remaining Contractual Term (years), Options vested and expected to vest		8 years 9 months 18 days	8 years 10 months 25 days	9 years 8 months 12 days
Weighted Average Remaining Contractual Term (years), Options vested and exercisable		7 years 10 months 25 days	8 years 10 months 25 days	9 years 8 months 12 days
Aggregate Intrinsic Value, Balances		$ 31,784,488	$ 1,546,599
Aggregate Intrinsic Value, Options vested and expected to vest		31,784,488	1,546,599
Aggregate Intrinsic Value, Options vested and exercisable		$ 11,324,729	340,334
Conversion of performance to service based		591,892
Weighted Average Exercise Price, Conversion of shares		$ 2.53
Aggregate Intrinsic Value, Exercised		$ 1,871,041	$ 2,950
2017 Long Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Beginning balances	3,500,075
Number of Options, Granted	50,879
Number of Options, Exercised	(365,111)
Number of Options, Forfeited	(82,907)
Number of Options, Ending balances	3,102,936	3,500,075
Number of Options, Options vested and expected to vest	3,102,936
Number of Options, Options vested and exercisable	830,912
Weighted Average Exercise Price Per share, Beginning balances	$ 5.43
Weighted Average Exercise Price (per share), Granted	20.81
Weighted Average Exercise Price (per share), Exercised	2.45
Weighted Average Exercise Price (per share), Forfeited	2.78
Weighted Average Exercise Price (per share), Ending balances	6.11	$ 5.43
Weighted Average Exercise Price (per share), Options vested and expected to vest	6.11
Weighted Average Exercise Price (Per share), Options vested and exercisable	$ 2.33
Weighted Average Remaining Contractual Term (years)	8 years 3 months 18 days	8 years 9 months 18 days
Weighted Average Remaining Contractual Term (years), Options vested and expected to vest	8 years 3 months 18 days
Weighted Average Remaining Contractual Term (years), Options vested and exercisable	7 years 3 months 18 days
Aggregate Intrinsic Value, Balances	$ 57,188,986	$ 31,784,488
Aggregate Intrinsic Value, Options vested and expected to vest	57,188,986
Aggregate Intrinsic Value, Options vested and exercisable	$ 18,455,289

Stock Option Plans and Stock-46

Stock Option Plans and Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 9,255	$ 343	$ 4,514	$ 568	$ 246
Cost of Revenue - Subscription
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	374	18	133	34	12
Cost of Revenue - Services and Other
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	722	38	458	63	20
Research and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	1,293	65	658	118	62
General and Administrative Expenses
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	4,035	75	2,062	96	28
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 2,831	$ 147	$ 1,203	$ 257	$ 124

Net Loss Per Share Attributab47

Net Loss Per Share Attributable to Common Shareholders - Weighted Average Outstanding Shares of Common Stock Equivalents Excluded from the Computation of the Diluted Net Loss per Share (Details) - shares	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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	5,869,228	5,503,924	5,422,857	6,731,392	7,803,102
Stock Options
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	3,391,821	2,194,152	2,402,225	1,799,632	495,315
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	1,189,385		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	1,288,022	3,309,772	2,915,228	4,931,760	7,307,787

Organization and Description 48

Organization and Description of Business - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Date of incorporation	Aug. 8, 2014
State of incorporation	Delaware

Summary of Significant Accoun49

Summary of Significant Accounting Policies - Summary of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]
Cash and cash equivalents per balance sheet	$ 81,809	$ 116,049		$ 18,214
Restricted cash per balance sheet		78		58
Cash, cash equivalents and restricted cash per cash flow	$ 81,929	$ 116,127	$ 20,960	$ 18,272	$ 14,949	$ 17,848

Summary of Significant Accoun50

Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018USD ($)Segment	Dec. 31, 2017USD ($)Segment	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2014USD ($)
Accounting Policies [Line Items]
Number of operating segments | Segment	1	1
Cash, cash equivalents and restricted cash	$ 81,929	$ 116,127	$ 18,272	$ 14,949	$ 20,960	$ 17,848
Accumulated deficit	$ (36,834)	(25,220)	(17,628)
Advertising Expense		$ 6,000	$ 4,200	2,600
Minimum
Accounting Policies [Line Items]
Property and equipment, estimated useful life		3 years
Maximum
Accounting Policies [Line Items]
Property and equipment, estimated useful life		5 years
ASU 2015-03 | Reclassification of Other Assets to Other Long-Term Liabilities
Accounting Policies [Line Items]
Other assets				(500)
Other long-term liabilities				$ 500

Goodwill - Additional Informati

Goodwill - Additional Information (Detail) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 219,377,000	$ 219,400,000	$ 219,377,000	$ 219,377,000
Goodwill, acquired during period	0	0	0	0
Goodwill, impairment loss	$ 0	$ 0	$ 0	$ 0	$ 0

Schedule of Cost and Amortizati

Schedule of Cost and Amortization of Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 110,910	$ 110,910	$ 110,910
Less: Accumulated amortization	(34,137)	(29,725)	(20,897)
Total intangible assets, net	$ 76,773	$ 81,185	$ 90,013
Customer Lists
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	15 years	15 years	15 years
Intangible assets, gross	$ 42,500	$ 42,500	$ 42,500
Developed Technology
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	9 years 7 months 6 days	9 years 7 months 6 days	9 years 7 months 6 days
Intangible assets, gross	$ 42,000	$ 42,000	$ 42,000
Trade Names and Trademarks
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	17 years	17 years	17 years
Intangible assets, gross	$ 24,500	$ 24,500	$ 24,500
Order Backlog
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	1 year 6 months	1 year 6 months	1 year 6 months
Intangible assets, gross	$ 1,100	$ 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	4 years 4 months 24 days	4 years 4 months 24 days
Intangible assets, gross	$ 810	$ 810	$ 810

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	$ 4,412	$ 4,428	$ 8,800	$ 9,100	$ 9,100
Impairment of intangible assets	0	0	0	0	0
General and Administrative Expenses
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles			0	71	64
Research and Development
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	68	81	100	200	0
Sales and Marketing
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	2,136	2,139	4,300	4,400	5,000
Cost of Revenue – License
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	2,016	2,016	4,000	4,000	3,700
Cost of Revenue – Subscription
Finite Lived Intangible Assets [Line Items]
Total amortization of acquired intangibles	$ 192	$ 192	$ 400	$ 400	$ 400

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Rent expense under all operating leases	$ 1.9	$ 1.2	$ 2.9	$ 1.8	$ 1.5
Accrued Liabilities [Member]
Commitments And Contingencies Disclosure [Abstract]
Deferred rent balance			$ 1.4	$ 0.2

Line of Credit and Long-Term 55

Line of Credit and Long-Term Debt - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 29, 2018	Jun. 28, 2017	Aug. 31, 2016	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Oct. 05, 2017	Dec. 31, 2014
Line Of Credit Facility [Line Items]
Line of credit outstanding balance		$ 167,500	$ 120,000								$ 110,000
Repayment/prepaid of borrowings outstanding				$ 60,000
Prepayment premium percentage	0.50%					1.50%
Prepayment premium amount	$ 300					$ 1,400
Loss on modification and partial extinguishment of debt				1,536		1,702
Amortization of debt issuance costs				200	$ 300	700	$ 700	$ 100	$ 4,500
Unamortized debt issuance costs				400		$ 700			700
Debt instrument interest rate during the period						8.00%	9.00%
Line of credit facility, principal prepayment conditions			The agreement also requires 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.
Proceeds from loan used to fund preferred stock dividend		50,400
Unamortized debt issuance costs						$ 1,800			1,800
Long-term debt balance				9,640		68,329	$ 107,344		68,329
Term Loan
Line Of Credit Facility [Line Items]
Line of credit outstanding balance	10,000	160,000	$ 115,000	$ 10,000		70,000	110,000		70,000		100,000
Repayment/prepaid of borrowings outstanding	$ 60,000					90,000
Debt instrument, maturity date				Aug. 16, 2021
Debt Instrument, interest payments				quarterly
Debt instrument interest rate during the period				6.80%
Revolving Line of Credit
Line Of Credit Facility [Line Items]
Line of credit outstanding balance		7,500	$ 5,000	$ 0		0	$ 0		0		$ 10,000
Debt instrument interest rate during the period				6.80%
Line of credit						1,500			1,500
Standby Letters of Credit
Line Of Credit Facility [Line Items]
Line of credit outstanding balance										$ 6,000
Standby letters of credit						6,000			$ 6,000
Modified Loan and Security Agreements
Line Of Credit Facility [Line Items]
Line of credit outstanding balance		$ 50,000
Prepayment premium amount						$ 1,400
Line of credit facility, principal prepayment conditions		The agreement also requires prepayments in the case of certain events including asset sales in excess of $1.0 million, proceeds from an IPO, proceeds in excess of $1.0 million from an insurance settlement, or proceeds from a new debt agreement.
London Interbank Offered Rate (LIBOR)
Line Of Credit Facility [Line Items]
Percentage of LIBOR floor rate		1.00%	1.00%			1.00%	1.00%		1.00%
Applicable margin rate		7.00%	8.00%			7.00%	8.00%
London Interbank Offered Rate (LIBOR) | Term Loan
Line Of Credit Facility [Line Items]
Percentage of LIBOR floor rate				2.30%		1.00%			1.00%
Applicable margin rate				4.50%		4.50%		3.70%
London Interbank Offered Rate (LIBOR) | Revolving Line of Credit
Line Of Credit Facility [Line Items]
Percentage of LIBOR floor rate				2.30%		1.00%			1.00%
Applicable margin rate				4.50%		4.50%		3.50%

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Prepayments and other current assets	$ 9,784,000		$ 10,013,000	$ 7,694,000
Other non-current assets	3,328,000		3,542,000	980,000
General and Administrative Expenses
Related Party Transaction [Line Items]
Consulting fees		$ 625,000	1,100,000	1,000,000	$ 750,000
Affiliated Entity
Related Party Transaction [Line Items]
Ordinary sales transactions with affiliate	194,000	93,000	858,000	37,000	59,000
Purchase transactions with affiliate	310,000	$ 559,000	942,000	313,000	39,000
Accounts payable			3,400	5,000
Accounts receivable	$ 0		516,000	0
Payable to controlling entity					$ 459,401
Payable to controlling entity converted to additional paid in capital				459,401
Non-Executive Employees
Related Party Transaction [Line Items]
Personal tax liabilities				626,000
Prepayments and other current assets			0	0
Other non-current assets			$ 101,000	$ 319,000

Stock Option Plans and Stock-57

Stock Option Plans and Stock-Based Compensation - Additional Information (Detail)	1 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended
	Nov. 30, 2017shares	Dec. 31, 2017USD ($)Employeeshares	Jun. 30, 2018USD ($)$ / sharesshares	Jun. 30, 2017USD ($)$ / shares	Dec. 31, 2017USD ($)Employee$ / sharesshares	Dec. 31, 2016USD ($)Employee$ / sharesshares	Dec. 31, 2015USD ($)Employee$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Purchase of common stock under ESPP | shares	0
Weighted average grant date fair value per share | $ / shares			$ 9.19	$ 1.64	$ 4.32	$ 0.83	$ 1.15
Stock-based compensation expense			$ 9,255,000	$ 343,000	$ 4,514,000	$ 568,000	$ 246,000
Total fair value of shares vested			600,000	200,000	323,000	$ 571,000	$ 50,000
Total unrecognized compensation expense related to non-vested stock options granted		$ 10,700,000	$ 9,200,000	$ 1,400,000	$ 10,700,000
Unrecognized compensation expense, weighted-average period of recognition		3 years 1 month 20 days	2 years 6 months 3 days	2 years 9 months 10 days
Number of shares, granted | shares					1,592,370	401,094	1,349,782
Share-based compensation intrinsic value of options exercise					$ 1,871,041	$ 2,950
Number of shares, vested | shares					437,829	382,364	10,781
Expected dividend rate			0.00%	0.00%	0.00%
Weighted-average grant date fair value | $ / shares					$ 4.13	$ 0.81	$ 1.16
2015 Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock reserve for issuance | shares							250,000
Shares available for issuance | shares		123,105	132,202		123,105
2015 Stock Option and Grant Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for issuance | shares		425,112	497,868		425,112
2017 Long Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock reserve for issuance | shares		8,856,876			8,856,876
Number of additional shares authorized for issuance every year on January 1st under share-based compensation plan | shares					4,428,438
Vesting period	4 years
Shares available for issuance | shares		6,890,082	6,441,482		6,890,082
Incentive Unit Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense					$ 3,200,000	$ 60,000	$ 86,000
Total unrecognized compensation expense related to non-vested stock options granted		$ 9,000,000	$ 4,700,000		$ 9,000,000
Unrecognized compensation expense, weighted-average period of recognition			6 months		1 year
Number of shares, granted | shares			0
Aggregate intrinsic value, non-vested		$ 32,500,000	$ 994,173,000		$ 32,500,000	8,500,000	$ 5,700,000
Share-based compensation intrinsic value of options exercise			$ 24,400,000
Number of shares, vested | shares			1,200,000
Compensation related expenses			$ 4,300,000	$ 21,000
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, Plan Modification, Incremental Compensation Cost		$ 600,000			$ 2,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Share-based Liabilities Paid					$ 116,000	194,000
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Accelerated Incremental Compensation Cost		$ 154,000
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%		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%		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%		25.00%
Incentive Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock reserve for issuance | shares							5,000,000
Incentive 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 | shares							500,000
Total unrecognized compensation expense related to non-vested stock options granted			$ 14,900,000
Unrecognized compensation expense, weighted-average period of recognition			3 years 5 months 19 days
Number of shares, granted | shares			423,413
Share-based compensation intrinsic value of options exercise			$ 30,600,000
Compensation related expenses			$ 2,500,000	0
Number of shares, expected to vest | shares			1,245,609
Weighted average remaining contractual period			2 years
Incentive Stock Options and Nonqualified Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options granted expire period							10 years
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense			$ 2,500,000	$ 300,000	$ 1,000,000	$ 508,000	$ 160,000
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, granted | shares					187,469	101,427	322,846
Share-based compensation intrinsic value of options exercise					$ 101,178	$ 1,942
Number of shares, vested | shares					141,675	106,903	33,613
Expected dividend rate					0.00%	0.00%	0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Number of Employees Affected | Employee		40			34	26	16
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost		$ 74,000			$ 45,000	$ 98,000	$ 37,000
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Future Compensation Cost		3,600,000			$ 3,600,000
Weighted-average grant date fair value | $ / shares					$ 1.55	$ 0.84	$ 1.12
RSUs Issued and Outstanding
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation expense related to non-vested stock options granted		$ 10,600,000			$ 10,600,000
Unrecognized compensation expense, weighted-average period of recognition					3 years 10 months 17 days
Number of shares, granted | shares					897,284
Number of shares, vested | shares					0
Weighted average remaining contractual period					9 years 10 months 25 days
Weighted-average grant date fair value | $ / shares					$ 12.18

Stock Option Plans and Stock-58

Stock Option Plans and Stock-Based Compensation - Summary of Fair Value of Stock Options Estimated by Using Weighted Average Assumptions (Detail)	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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%
Expected volatility, Maximum	41.00%
Risk-free interest rate, Minimum	2.63%	2.11%
Risk-free interest rate, Maximum	2.91%	2.11%
Expected term (in years)	6 years 3 months	6 years 3 months
Time Based
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected dividend rate			0.00%	0.00%	0.00%
Expected volatility				49.00%	48.40%
Expected volatility, Minimum			40.90%
Expected volatility, Maximum			49.00%
Risk-free interest rate, Minimum			1.96%	1.31%	1.55%
Risk-free interest rate, Maximum			2.18%	2.24%	1.95%
Expected term (in years)					6 years 3 months
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected dividend rate			0.00%	0.00%	0.00%
Expected volatility				49.00%	48.40%
Expected volatility, Minimum			40.90%
Expected volatility, Maximum			49.00%
Risk-free interest rate, Minimum			1.96%	1.27%	1.68%
Risk-free interest rate, Maximum			2.18%	2.16%	1.93%
Minimum | Time Based
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)			6 years 3 months	5 years 5 months
Minimum | Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)			5 years 6 months	5 years 9 months	5 years 6 months
Maximum | Time Based
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)			6 years 3 months	6 years 3 months
Maximum | Performance Shares
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	6 years 3 months

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Examination [Line Items]
U.S. federal corporate tax rate	21.00%			35.00%	34.00%	34.00%
Interest or penalties expense	$ 0	$ 0		$ 0	$ 0	$ 0
Tax benefit change in valuation allowance				1,800,000
Recognized tax expense related to transition tax				0
Federal net operating loss carryforwards				57,800,000	72,400,000	78,500,000
Research and development credits of approximately				4,200,000	3,400,000	2,700,000
Unrecognized tax benefits				$ 1,863,000	$ 883,000	$ 686,000	$ 320,000
Effective income tax rate	7.30%	2.40%		(43.30%)	38.50%	19.50%
Scenario, Plan
Income Tax Examination [Line Items]
U.S. federal corporate tax rate			21.00%
Maximum
Income Tax Examination [Line Items]
U.S. federal corporate tax rate				35.00%
U.S. Federal
Income Tax Examination [Line Items]
Income tax examination description	no longer subject to U.S. federal income tax examinations for years before 2014			No longer subject to U.S. federal income tax examinations for years before 2013
Valuation allowance				$ 3,600,000	$ 500,000
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 2012			No longer subject to state, local and foreign income tax examinations by tax authorities for years before 2012
Foreign Tax Authority
Income Tax Examination [Line Items]
Valuation allowance				$ 1,700,000	$ 0

Net Loss Per Share Attributab60

Net Loss Per Share Attributable to Common Shareholders - Schedule of Calculation of Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net loss	$ (11,614)	$ (6,587)	$ (7,592)	$ (3,173)	$ (10,807)
Deemed dividends to preferred stockholders		(12,590)	(21,129)	(23,618)	(21,597)
Net loss attributable to common shareholders	$ (11,614)	$ (19,177)	$ (28,721)	$ (26,791)	$ (32,404)
Denominator
Basic	85,984,103	47,567,048	52,339,804	45,933,218	43,929,159
Weighted average shares outstanding Basic and diluted	85,984,103	47,567,048
Diluted	85,984,103	47,567,048	52,339,804	45,933,218	43,929,159
Net loss attributable to common shareholders
Basic and diluted	$ (0.14)	$ (0.40)
Basic	(0.14)	(0.40)	$ (0.55)	$ (0.58)	$ (0.74)
Diluted	$ (0.14)	$ (0.40)	$ (0.55)	$ (0.58)	$ (0.74)

Business Combination - Addition

Business Combination - Additional Information (Detail) - USD ($)	Jul. 15, 2015	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 219,377,000	$ 219,377,000	$ 219,400,000	$ 219,377,000
whitebox Security Ltd.
Business Acquisition [Line Items]
Business Combination, Consideration	$ 15,667,000
Goodwill	10,485,000
Business combination, acquisition Costs	$ 452,000

Business Combination - Schedule

Business Combination - Schedule of Fair Values of Assets Acquired and Liabilities Assumed at Acquisition Date (Detail) - USD ($) $ in Thousands	Jul. 15, 2015	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 219,377	$ 219,377	$ 219,400	$ 219,377
whitebox Security Ltd.
Business Acquisition [Line Items]
Cash and cash equivalents	$ 458
Accounts receivable	423
Prepaid expenses and other assets	34
Deferred revenue contracts	162
Goodwill	10,485
Intangible assets	5,810
Total assets	17,372
Accounts payable	(91)
Accrued expenses	(250)
Deferred tax liability	(1,202)
Deferred revenue	(162)
Total liabilities	(1,705)
Total consideration	15,667
Total consideration, net of cash acquired	$ 15,209

Business Combination - Summary

Business Combination - Summary of Fair Value Estimates Identifiable Intangible Assets and Estimated Useful Lives (Detail) - whitebox Security Ltd. $ in Thousands	Jul. 15, 2015USD ($)
Business Acquisition [Line Items]
Intangible assets	$ 5,810
Developed Technology
Business Acquisition [Line Items]
Intangible assets	$ 5,000
Intangible asset, estimated useful life	7 years
Non-competition Agreements and Related Items
Business Acquisition [Line Items]
Intangible assets	$ 810
Intangible asset, estimated useful life	4 years 4 months 24 days

Property and Equipment Net (Det

Property and Equipment Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 5,392	$ 3,146
Less: accumulated depreciation		(2,374)	(1,291)
Property and equipment, net	$ 3,595	3,018	1,855
Computer Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross		4,559	2,618
Other Assets
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 833	$ 528

Property and Equipment Net - Ad

Property and Equipment Net - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Depreciation Expense	$ 1.4	$ 0.9	$ 0.6
Impairments of property and equipment	$ 0	$ 0	$ 0

Schedule of Estimated Future Am

Schedule of Estimated Future Amortization Expense of Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite lived intangible assets, fiscal year maturity [Abstract]
2,018		$ 8,825
2,019		8,825
2,020		8,825
2,021		8,825
2,022		8,825
Thereafter		37,060
Total intangible assets, net	$ 76,773	$ 81,185	$ 90,013

Future Minimum Annual Lease Pay

Future Minimum Annual Lease Payments Under Non-cancelable Operating Leases, Inclusive of Sublease Proceeds (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,018	$ 2,785
2,019	3,004
2,020	4,445
2,021	4,997
2,022	4,921
Thereafter	32,127
Total minimum lease payments	$ 52,279

Aggregate Maturities of Company

Aggregate Maturities of Company's Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Line Of Credit Facility [Abstract]
2,018		$ 0
2,019		116
2,020		0
2,021		70,000
2,022		0
Total debt		70,116
Less: deferred financing costs		(1,787)
Long-term debt, net		68,329
Less: current portion		0
Long term debt	$ 9,640	$ 68,329	$ 107,344

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Jun. 27, 2017	Nov. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2018
Class of Stock [Line Items]
Shares authorized		310,000,000
Common stock, shares authorized		300,000,000	300,000,000	59,500,000	300,000,000
Preferred stock, shares authorized		10,000,000	10,000,000	0	10,000,000
Common stock, par value		$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001
Preferred stock, par value		$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001
Dividend rate, percentage		9.00%
Dividend rate, Per share amount		$ 90
Dividend declared and paid	$ 50,400
Dividends payable, date to be paid	Dec. 15, 2016
Stock repurchased and retired			$ 487
Redeemable Convertible Preferred Stock
Class of Stock [Line Items]
Dividend rate, percentage			0.00%	9.00%
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]
Stock repurchased and retired, shares			190,434
Stock repurchased and retired			$ 487
Share price			$ 2.56
IPO
Class of Stock [Line Items]
Cumulative undeclared and unpaid dividends		$ 22,200
IPO | Redeemable Convertible Preferred Stock
Class of Stock [Line Items]
Redeemable convertible preferred shares converted		223,816
IPO | Common Stock
Class of Stock [Line Items]
Stock issued, conversion of shares		20,500,400

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Redeemable Convertible Preferred Stock (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Temporary Equity [Line Items]
Dividend percentage	9.00%
Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Date Issued		Sep. 30, 2014	Sep. 30, 2014
Share price		$ 1,000	$ 1,000
Shares authorized		0	500,000
Shares issued		0	223,987
Shares outstanding		0	223,987	222,898	223,084
Liquidation preference			$ 275,463
Dividend percentage		0.00%	9.00%

Stock Option Plans and Stock-71

Stock Option Plans and Stock-Based Compensation - Summary of Non-vested Vesting Stock Options (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Number of Shares
Number of Shares, Beginning Balance	1,216,796	1,315,668
Number of shares, granted	1,592,370	401,094	1,349,782
Number of Shares, Conversion of vested performance to service based	322,988
Number of Shares, Vested	(437,829)	(382,364)	(10,781)
Number of Shares, Forfeited	(111,076)	(117,602)	(23,333)
Non-vested number of shares, Ending Balance	2,583,249	1,216,796	1,315,668
Weighted average grant date Fair Value
Weighted average grant date Fair Value, Beginning Balance	$ 1.05	$ 1.15
Weighted average grant date Fair Value, Granted	4.13	0.81	$ 1.16
Weighted Average Grant Date Fair Value, Conversion of vested performance to service based	11.95
Weighted average grant date Fair Value, Vested	1.04	1.16	1.17
Weighted average grant date Fair Value, Forfeited	1.07	1.12	1.17
Weighted average grant date Fair Value, Ending Balance	$ 4.32	$ 1.05	$ 1.15
Performance Shares
Number of Shares
Number of Shares, Beginning Balance	277,194	289,233
Number of shares, granted	187,469	101,427	322,846
Number of Shares, Conversion of vested performance to service based	322,988
Number of Shares, Vested	(141,675)	(106,903)	(33,613)
Number of Shares, Forfeited		(6,563)
Non-vested number of shares, Ending Balance		277,194	289,233
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	$ 1.12
Weighted Average Grant Date Fair Value, Conversion of vested performance to service based	11.95
Weighted average grant date Fair Value, Vested	$ 1.54	0.99	1.12
Weighted average grant date Fair Value, Forfeited		1.18
Weighted average grant date Fair Value, Ending Balance		$ 1.01	$ 1.11

Stock Option Plans and Stock-72

Stock Option Plans and Stock-Based Compensation - Summary of performance Vesting Stock Option Activity (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Options, Beginning balances	1,622,118	1,326,449
Number of Options, Granted	1,592,370	419,839	1,349,782
Number of Options, Exercised	(152,330)	(6,568)
Number of Options, Forfeited	(153,975)	(117,602)	(23,333)
Number of options, Conversion of shares	(591,892)
Number of Options, Ending balances	3,500,075	1,622,118	1,326,449
Number of Options, Options vested and expected to vest	3,500,075	1,622,118	1,326,449
Number of Options, Options vested and exercisable	926,614	416,265	10,781
Weighted Average Exercise Price Per share, Beginning balances	$ 2.21	$ 2.38
Weighted Average Exercise Price (per share), Granted	9.54	1.69	$ 2.38
Weighted Average Exercise Price (per share), Exercised	2.22	1.77
Weighted Average Exercise Price (per share), Forfeited	2.21	2.31	2.42
Weighted Average Exercise Price, Conversion of shares	2.53
Weighted Average Exercise Price (per share), Options vested and expected to vest	5.43	2.21	2.38
Weighted Average Exercise Price (Per share), Options vested and exercisable	2.28	2.36	2.42
Weighted Average Exercise Price (per share), Ending balances	$ 5.43	$ 2.21	$ 2.38
Weighted Average Remaining Contractual Term (years)	8 years 9 months 18 days	8 years 10 months 25 days	9 years 8 months 12 days
Weighted Average Remaining Contractual Term (years), Options vested and expected to vest	8 years 9 months 18 days	8 years 10 months 25 days	9 years 8 months 12 days
Weighted Average Remaining Contractual Term (years), Options vested and exercisable	7 years 10 months 25 days	8 years 10 months 25 days	9 years 8 months 12 days
Aggregate Intrinsic Value, Exercised	$ 1,871,041	$ 2,950
Aggregate Intrinsic Value, Balances	31,784,488	1,546,599
Aggregate Intrinsic Value, Options vested and expected to vest	31,784,488	1,546,599
Aggregate Intrinsic Value, Options vested and exercisable	$ 11,324,729	$ 340,334
Performance Shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Options, Beginning balances	412,773	322,846
Number of Options, Granted	187,469	101,427	322,846
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		412,773	322,846
Number of Options, Options vested and exercisable		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	$ 2.32
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), Options vested and expected to vest		2.19	2.32
Weighted Average Exercise Price (Per share), Options vested and exercisable			2.33
Weighted Average Exercise Price (per share), Ending balances		$ 2.19	$ 2.32
Weighted Average Remaining Contractual Term (years)	8 years 6 months	8 years 10 months 25 days	9 years 8 months 12 days
Weighted Average Remaining Contractual Term (years), Options vested and expected to vest		8 years 10 months 25 days	9 years 8 months 12 days
Weighted Average Remaining Contractual Term (years), Options vested and exercisable		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		401,616
Aggregate Intrinsic Value, Options vested and exercisable		$ 134,871

Stock Option Plans and Stock-73

Stock Option Plans and Stock-Based Compensation - Summary of Non-Vested Incentive Unit Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Number of Shares
Number of Shares, Beginning Balance	1,216,796	1,315,668
Number of shares, granted	1,592,370	401,094	1,349,782
Number of shares, vested	437,829	382,364	10,781
Number of Shares, Forfeited	(111,076)	(117,602)	(23,333)
Non-vested number of shares, Ending Balance	2,583,249	1,216,796	1,315,668
Weighted-average exercise price (per share)
Weighted average grant date Fair Value, Beginning Balance	$ 1.05	$ 1.15
Weighted-average exercise price (per share), Granted	4.13	0.81	$ 1.16
Weighted-average exercise price (per share), Forfeited	1.07	1.12	1.17
Weighted average grant date Fair Value, Ending Balance	$ 4.32	$ 1.05	$ 1.15
Incentive Unit Plan
Number of Shares
Number of Shares, Beginning Balance	4,127,000	5,526,000	7,080,000
Number of shares, granted		1,677,000	170,000
Number of shares, vested	1,846,000	7,000	1,193,000
Number of Shares, Repurchased	0
Number of Shares, Forfeited	(39,000)	(20,000)	(531,000)
Number of Shares, Other		291,000
Non-vested number of shares, Ending Balance	2,242,000	4,127,000	5,526,000
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	0.0517
Weighted-average exercise price (per share), Vested	0.0517	0.0517	0.0517
Weighted-average exercise price (per share), Repurchased	0
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-74

Stock Option Plans and Stock-Based Compensation - Summary of Restricted Stock Unit Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Number of Shares
Number of Shares, Beginning Balance	1,216,796	1,315,668
Number of shares, granted	1,592,370	401,094	1,349,782
Number of shares, vested	437,829	382,364	10,781
Number of Shares, Forfeited	111,076	117,602	23,333
Non-vested number of shares, Ending Balance	2,583,249	1,216,796	1,315,668
RSUs Issued and Outstanding
Number of Shares
Number of Shares, Beginning Balance
Number of shares, granted	897,284
Number of shares, vested	0
Number of Shares, Forfeited	0
Non-vested number of shares, Ending Balance	897,284
Weighted-Average Remaining Contractual Term (In years)
Weighted-Average Remaining Contractual Term, Balances	9 years 10 months 25 days
Aggregate intrinsic value
Aggregate intrinsic value, Balances	$ 186

Stock Option Plans and Stock-75

Stock Option Plans and Stock-Based Compensation - Summary of Non-Vested Incentive activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Number of Shares
Number of Shares, Beginning Balance	1,216,796	1,315,668
Number of shares, granted	1,592,370	401,094	1,349,782
Number of shares, vested	437,829	382,364	10,781
Number of Shares, Forfeited	111,076	117,602	23,333
Non-vested number of shares, Ending Balance	2,583,249	1,216,796	1,315,668
Weighted average grant date Fair Value
Weighted average grant date Fair Value, Beginning Balance	$ 1.05	$ 1.15
Weighted average grant date Fair Value, Granted	4.13	0.81	$ 1.16
Weighted average grant date Fair Value, Vested	1.04	1.16	1.17
Weighted average grant date Fair Value, Forfeited	1.07	1.12	1.17
Weighted average grant date Fair Value, Ending Balance	$ 4.32	$ 1.05	$ 1.15
RSUs Issued and Outstanding
Number of Shares
Number of Shares, Beginning Balance
Number of shares, granted	897,284
Number of shares, vested	0
Number of Shares, Forfeited	0
Non-vested number of shares, Ending Balance	897,284
Weighted average grant date Fair Value
Weighted average grant date Fair Value, Beginning Balance
Weighted average grant date Fair Value, Granted	$ 12.18
Weighted average grant date Fair Value, Vested	0
Weighted average grant date Fair Value, Forfeited	0
Weighted average grant date Fair Value, Ending Balance	$ 12.18

Schedule Accrued Expenses (Deta

Schedule Accrued Expenses (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Commissions		$ 8,559	$ 4,943
Bonus		5,063	2,895
Payroll and related benefits		2,640	988
Interest		34	794
Partner and customer programs		1,234	615
Sales and other taxes		1,373	615
Employee travel expenses		369	213
Consulting and professional services		339	188
Other		3,025	1,854
Total	$ 14,106	$ 22,636	$ 13,105

Current Portion of Prepayments

Current Portion of Prepayments and Other Current Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Prepaid expenses		$ 4,376	$ 2,783
Prepaid insurance		660	447
Prepaid commissions		2,931	3,753
Other		2,046	711
Total	$ 9,784	$ 10,013	$ 7,694

Other Non-Current Assets (Detai

Other Non-Current Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses		$ 3,210	$ 546
Deposits		222	115
Note receivable			319
Other		110
Total	$ 3,328	$ 3,542	$ 980

Summary of Consolidated Loss Be

Summary of Consolidated Loss Before Provision for Income Taxes (Detail) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Domestic			$ (2,780)	$ (2,435)	$ (14,727)
Foreign			(2,519)	(2,723)	1,306
Loss before income taxes	$ (10,821)	$ (6,431)	$ (5,299)	$ (5,158)	$ (13,421)

Summary of Provision for Income

Summary of Provision for Income Taxes consisted (Detail) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current
Federal			$ 293
State			189	$ 21	$ 8
Foreign			1,997	531	704
Total current			2,479	552	712
Deferred
Federal			(293)	(1,315)	(3,222)
State			202	(118)	(99)
Foreign			(95)	(1,104)	(5)
Total deferred			69	(2,537)	(3,326)
Deferred income taxes and tax credits			(186)
(Benefit) provision	$ 793	$ 156	$ 2,293	$ (1,985)	$ (2,614)

Net Tax Effects of Temporary Di

Net Tax Effects of Temporary Differences between the Carring Amount of Significant Components of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Research and development and other credits	$ 6,187	$ 5,235
Net operating loss carryforward	14,795	26,867
Charitable contributions		11
Deferred revenue	1,355	1,115
Stock compensation	125	17
Accrued expense	1,323	1,346
Depreciable and amortizable assets	29	368
Other	228
Total deferred tax assets	24,042	34,959
Deferred tax liabilities:
Prepaid expenses	(1,249)	(1,389)
Intangibles	(17,232)	(32,751)
Total deferred tax assets, net	5,561	819
Less valuation allowance for deferred tax assets	(5,297)	(486)
Net deferred tax assets	$ 264	$ 333

Difference between Federal Inco

Difference between Federal Income Tax Rate and Effective Income Tax Rate (Detail)	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
U.S. federal taxes at statutory rate	21.00%		35.00%	34.00%	34.00%
Foreign tax rate differentials			(9.10%)	(11.80%)	(0.70%)
Research and development credit			17.80%	18.20%	1.80%
Foreign tax credit			18.30%	4.70%	3.90%
Stock options			(23.60%)	(3.80%)	(1.10%)
Permanent differences and other			(14.40%)	(7.80%)	(5.30%)
State taxes, net of federal benefit			(4.00%)	(0.10%)	2.80%
Change in state rate			(1.90%)	7.30%	(11.60%)
Change in other valuation allowance due to operations			(58.40%)	(1.90%)	0.40%
Other			(2.00%)	(0.30%)	(4.70%)
Total income tax benefit (expense)	7.30%	2.40%	(43.30%)	38.50%	19.50%
Scenario Previously Reported Member
U.S. federal taxes at statutory rate			34.00%

Reconciliation of Unrecognized

Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Beginning balance	$ 883	$ 686	$ 320
Additions based on tax positions related to prior year	507	197	366
Additions based on tax positions related to current year	473
Ending balance	$ 1,863	$ 883	$ 686

Geographic Information and Ma84

Geographic Information and Major Customers - Summary of Consolidated Total Revenue by Geography (Detail) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Summary of Significant Accounting Policies [Line Items]
Total revenue	$ 104,274	$ 74,726	$ 186,056	$ 132,412	$ 95,356
United States
Summary of Significant Accounting Policies [Line Items]
Total revenue	67,195	53,020	134,676	92,116	63,440
EMEA
Summary of Significant Accounting Policies [Line Items]
Total revenue	24,952	13,853	33,097	25,668	20,770
Rest of the World
Summary of Significant Accounting Policies [Line Items]
Total revenue	$ 12,127	$ 7,853	$ 18,283	$ 14,628	$ 11,146