PROS (PRO) 10-Q 5 May 20 2020 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	Apr. 27, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Entity File Number	001-33554
Entity Registrant Name	PROS HOLDINGS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	76-0168604
Entity Address, Address Line One	3100 Main Street, Suite 900
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	(713)
Local Phone Number	335-5151
Title of 12(b) Security	Common stock
Trading Symbol	PRO
Security Exchange Name	NYSE
Entity Central Index Key	0001392972
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		43,291,660

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 251,782	$ 306,077
Trade and other receivables, net of allowance of $2,810 and $214, respectively	53,591	65,074
Deferred Costs, Current	5,829	5,756
Prepaid and other current assets	9,394	9,038
Total current assets	320,596	385,945
Property and equipment, net	26,703	14,794
Operating Lease, Right-of-Use Asset	25,707	26,550
Deferred Costs, Noncurrent	14,642	15,478
Intangible Assets, Net (Excluding Goodwill)	12,954	14,605
Goodwill	48,912	49,104
Other long term assets, net	7,163	6,831
Total assets	456,677	513,307
Current liabilities:
Accounts payable	12,757	9,098
Accrued liabilities	18,734	22,748
Accrued payroll and other employee benefits	12,604	32,656
Operating Lease, Liability, Current	7,383	7,173
Deferred Revenue, Current	126,325	124,459
Total current liabilities	177,803	196,134
Long-term deferred revenue	13,915	17,801
Convertible Debt, Noncurrent	112,406	110,704
Operating Lease, Liability, Noncurrent	21,683	22,391
Other Liabilities, Noncurrent	1,260	1,281
Total liabilities	327,067	348,311
Commitments and contingencies (see Note 9)
Stockholders' equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized; none issued	0	0
Common stock, $0.001 par value, 75,000,000 shares authorized; 47,972,383 and 47,310,846 shares issued, respectively; 43,291,660 and 42,630,123 shares outstanding, respectively	48	47
Additional paid-in capital	548,014	560,496
Treasury stock, 4,680,723 common shares, at cost	(29,847)	(29,847)
Retained Earnings (Accumulated Deficit)	(384,524)	(361,789)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(4,081)	(3,911)
Total stockholders' equity	129,610	164,996
Total liabilities and stockholders' equity	$ 456,677	$ 513,307

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Allowance for bad debts	$ 2,810,000	$ 214,000
Preferred stock - par value	$ 0.001	$ 0.001
Preferred stock - shares authorized	5,000,000	5,000,000
Preferred stock - shares issued	0	0
Common stock - par value	$ 0.001	$ 0.001
Common stock - shares authorized	75,000,000	75,000,000
Common stock - shares issued	47,972,383	47,310,846
Common stock - shares outstanding	43,291,660	42,630,123
Treasury stock - shares	4,680,723	4,680,723

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Total subscription, maintenance and support revenue	$ 55,693	$ 46,248
Total revenue	66,311	56,131
Cost of Goods and Services Sold	28,727	20,790
Cost of subscription, maintenance and support	15,654	12,588
Gross profit	37,584	35,341
Operating Expenses
Selling and Marketing Expense	24,920	21,485
General and Administrative Expense	14,880	11,667
Research and development	19,136	15,799
Income from operations	(21,352)	(13,610)
Other income (expense):
Convertible debt interest and amortization	(2,062)	(4,356)
Other Nonoperating Income (Expense)	831	1,271
Loss before income tax provision	(22,583)	(16,695)
Income tax provision (benefit)	152	222
Net income (loss)	$ (22,735)	$ (16,917)
Earnings Per Share, Basic	$ (0.53)	$ (0.45)
Net earnings (loss) per share:
Earnings Per Share, Basic and Diluted	(0.53)	(0.45)
Earnings Per Share, Diluted	$ (0.53)	$ (0.45)
Weighted average number of shares:
Weighted Average Number of Shares Outstanding, Basic and Diluted	43,102	37,623
Weighted Average Number of Shares Outstanding, Basic	43,102	37,623
Other comprehensive income, net of tax:
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	$ (170)	$ (270)
Other comprehensive income	(170)	(270)
Comprehensive income (loss)	(22,905)	(17,187)
Subscription and Circulation [Member]
Revenue from Contract with Customer, Including Assessed Tax	43,170	30,921
Cost of Goods and Services Sold	12,864	9,786
Maintenance [Member]
Revenue from Contract with Customer, Including Assessed Tax	12,523	15,327
Cost of Goods and Services Sold	2,790	2,802
Service [Member]
Revenue from Contract with Customer, Including Assessed Tax	10,618	9,883
Cost of Goods and Services Sold	$ 13,073	$ 8,202

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities:
Net income (loss)	$ (22,735)	$ (16,917)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, Depletion and Amortization	3,420	3,325
Amortization of Financing Costs and Discounts	1,712	3,116
Share-based compensation	6,347	6,046
Provision for doubtful accounts	2,596	0
Changes in operating assets and liabilities:
Accounts and unbilled receivables	8,889	(3,773)
Increase (Decrease) in Deferred Costs	763	(893)
Prepaid expenses and other assets	(701)	(2,065)
Accounts payable	1,447	565
Accrued liabilities	(3,840)	2,634
Accrued payroll and other employee benefits	(20,055)	(11,779)
Deferred revenue	(2,016)	11,646
Net cash provided by (used in) operating activities	(24,173)	(8,095)
Investing activities:
Purchases of property and equipment	(10,993)	(611)
Internal-use software development costs capitalized	(412)	(868)
Payments to Acquire Intangible Assets	0	(50)
Net cash provided by (used in) investing activities	(11,405)	(1,529)
Financing activities:
Proceeds from Stock Plans	1,364	943
Tax withholding related to net share settlement of restricted stock units	(20,172)	(14,239)
Net cash provided by (used in) financing activities	(18,808)	(13,296)
Effect of Exchange Rate on Cash and Cash Equivalents	91	80
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(54,295)	(22,840)
Cash and cash equivalents:
Beginning of period	306,077	295,476
End of period	251,782	272,636
Capital Expenditures Incurred but Not yet Paid	$ 3,253	$ 1,565

Condensed Consolidated Statem_3

Condensed Consolidated Statement of Stockholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income, net of tax [Member]
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2018		37,155,906
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	$ 54,899	$ 42	$ 364,877	$ (13,938)	$ (292,708)	$ (3,374)
Treasury Stock, Shares - Beginning Balance at Dec. 31, 2018				4,417,585
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		681,415
Stock Issued During Period, Value, Restricted Stock Award, Gross	(14,239)	$ 0	(14,239)
Stock Issued During Period, Shares, Employee Stock Purchase Plans		35,340
Proceeds from Stock Plans	943		943
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	6,054		6,054
Other Comprehensive Income (Loss), Net of Tax	(270)					(270)
Net Income (Loss) Attributable to Parent	(16,917)				(16,917)
Treasury Stock, Shares - Enging Balance at Mar. 31, 2019				4,417,585
Stockholders' Equity Attributable to Parent at Mar. 31, 2019	$ 30,470	$ 42	357,635	$ (13,938)	(309,625)	(3,644)
Common Stock, Shares, Outstanding, Ending Balance at Mar. 31, 2019		37,872,661
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2019	42,630,123	42,630,123
Stockholders' Equity Attributable to Parent at Dec. 31, 2019	$ 164,996	$ 47	560,496	$ (29,847)	(361,789)	(3,911)
Treasury Stock, Shares - Beginning Balance at Dec. 31, 2019	4,680,723			4,680,723
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		634,600
Stock Issued During Period, Value, Restricted Stock Award, Gross	$ (20,172)	$ 1	(20,173)
Stock Issued During Period, Shares, Employee Stock Purchase Plans	26,774	26,774
Proceeds from Stock Plans	$ 1,364		1,364
Warrant Exercise, Shares		163
Warrant Exercise, Value	0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	6,327		6,327
Other Comprehensive Income (Loss), Net of Tax	(170)					(170)
Net Income (Loss) Attributable to Parent	$ (22,735)				(22,735)
Treasury Stock, Shares - Enging Balance at Mar. 31, 2020	4,680,723			4,680,723
Stockholders' Equity Attributable to Parent at Mar. 31, 2020	$ 129,610	$ 48	$ 548,014	$ (29,847)	$ (384,524)	$ (4,081)
Common Stock, Shares, Outstanding, Ending Balance at Mar. 31, 2020	43,291,660	43,291,660

Organization and Nature of Oper

Organization and Nature of Operations	3 Months Ended
	Mar. 31, 2020
Organization and Nature of Operations [Abstract]
Organization and nature of operations	Organization and Nature of Operations PROS Holdings, Inc., a Delaware corporation, through its operating subsidiaries (collectively, the "Company"), provides artificial intelligence ("AI") solutions that power commerce in the digital economy by providing fast, frictionless and personalized buying experiences. PROS solutions enable dynamic buying experiences for both business-to-business ("B2B") and business-to-consumer ("B2C") companies across industry verticals. Companies can use the Company's selling, pricing, revenue optimization and eCommerce solutions to assess their market environments in real time to deliver customized prices and offers. The Company's solutions enable buyers to move fluidly across its customers’ direct sales, online, mobile and partner channels with personalized experiences regardless of which channel those buyers choose. The Company's decades of data science and AI expertise are infused into its solutions and are designed to reduce time and complexity through actionable intelligence. The Company provides standard configurations of its software based on the industries it serves and offers professional services to configure these solutions to meet the specific needs of each customer.

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	2. Summary of Significant Accounting Policies Basis of presentation The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States ("GAAP") for interim financial reporting and applicable quarterly reporting regulations of the Securities and Exchange Commission ("SEC"). In management's opinion, the accompanying interim unaudited condensed consolidated financial statements include all adjustments necessary for a fair statement of the financial position of the Company as of March 31, 2020 , the results of operations for the three months ended March 31, 2020 and 2019 , cash flows for the three months ended March 31, 2020 and 2019 , and stockholders' equity for the three months ended March 31, 2020 and 2019 . Certain information and disclosures normally included in the notes to the annual financial statements prepared in accordance with GAAP have been omitted from these interim unaudited condensed consolidated financial statements pursuant to the rules and regulations of the SEC. Accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2019 ("Annual Report") filed with the SEC. The unaudited condensed consolidated balance sheet as of December 31, 2019 was derived from the Company's audited consolidated financial statements but does not include all disclosures required under GAAP. Certain prior year amounts have been reclassified for consistency with the current year presentation. This reclassification had no effect on the reported results of operations. License revenue and license cost of revenue are now combined with subscription revenue and subscription cost of revenue, respectively. Changes in accounting policies There have been no material changes in the Company’s significant accounting policies and their application as compared to the significant accounting policies described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, except for the Company's adoption of certain accounting standards described in more detail under " Recently adopted accounting pronouncements " in this Note 2 below. Fair value measurement The Company's financial assets that are included in cash and cash equivalents and that are measured at fair value on a recurring basis consisted of $239.0 million and $273.1 million at March 31, 2020 and December 31, 2019 , respectively, and were invested in treasury money market funds. The fair value of the treasury money market funds is determined based on quoted market prices, which represents level 1 in the fair value hierarchy as defined by ASC 820. Trade and other receivables Trade and other receivables are primarily comprised of trade receivables, net of allowance for doubtful accounts, contract assets and unbilled receivables. The Company records trade accounts receivable for its unconditional rights to consideration arising from the Company's performance under contracts with customers. The Company's standard billing terms are that payment is due upon receipt of invoice, payable generally within thirty to sixty days. The carrying value of such receivables, net of the allowance for doubtful accounts, represents their estimated net realizable value. When developing its estimate of expected credit losses on trade and other receivables, the Company considers the available information relevant to assessing the collectability of cash flows, which includes a combination of both internal and external information relating to past events, current conditions, and future forecasts as well as relevant qualitative and quantitative factors that relate to the environment in which the Company operates. Contract assets represent conditional rights to consideration that have been recognized as revenue in advance of billing the customer. Unbilled receivables represent unconditional rights to consideration arising from contingent revenue that have been recognized as revenue in advance of billing the customer. There are no comparable recent events that provide guidance as to the effect of the spread of COVID-19 as a global pandemic. As a result, the impact of COVID-19 is highly uncertain and subject to change. The Company does not yet know the full extent of the impact from COVID-19 to the Company's business operations or the global economy as a whole; however, the impact could have an adverse effect on the Company's customers and inherently the related receivables. Deferred costs Sales commissions earned by the Company's sales representatives are considered incremental and recoverable costs of obtaining a customer contract. Sales commissions are deferred and amortized on a straight-line basis over the period of benefit, which the Company has determined to be five to eight years. The Company determined the period of benefit by taking into consideration its customer contracts, expected renewals of those customer contracts (as the Company currently does not pay an incremental sales commission), the Company's technology and other factors. The Company also defers amounts earned by employees other than sales representatives who earn incentive payments under compensation plans that are also tied to the value of customer contracts acquired. Deferred costs were $20.5 million and $21.2 million as of March 31, 2020 and December 31, 2019 , respectively. Amortization expense for the deferred costs was $1.4 million and $1.1 million for the three months ended March 31, 2020 and 2019 , respectively. Deferred implementation costs The Company capitalizes certain contract fulfillment costs, including personnel and other costs (such as hosting, employee salaries, benefits and payroll taxes), that are associated with arrangements where professional services are not distinct from other undelivered obligations in its customer contracts. The Company analyzes implementation costs and capitalizes those costs that are directly related to customer contracts, that are expected to be recoverable, and that enhance the resources which will be used to satisfy the undelivered performance obligations in those contracts. Deferred implementation costs are amortized ratably over the remaining contract term once the revenue recognition criteria for the respective performance obligation has been met and revenue recognition commences. Deferred implementation costs were $4.1 million and $4.4 million as of March 31, 2020 and December 31, 2019 , respectively. Amortization expense for the deferred implementation costs was $0.5 million and $0.2 million for the three months ended March 31, 2020 and 2019 , respectively. Deferred implementation costs are included in prepaid and other current assets and other assets, noncurrent in the unaudited condensed consolidated balance sheets. Amortization of deferred implementation costs is included in cost of subscription and cost of services revenues in the accompanying unaudited condensed consolidated statements of comprehensive income (loss). Recently adopted accounting pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ("Topic 326") , in order to improve financial reporting of expected credit losses on financial instruments and other commitments to extend credit. Topic 326 requires that an entity measure and recognize expected credit losses for financial assets held at amortized cost and replaces the incurred loss impairment methodology in current GAAP with a methodology that requires consideration of a broader range of information to estimate credit losses. The Company adopted Topic 326 as of January 1, 2020 using the modified retrospective method and there was no material impact on the Company's unaudited condensed consolidated financial statements as of the adoption date. The Company recognized a $2.6 million provision for credit losses in the first quarter of 2020 representing the Company’s estimate of additional allowance for doubtful accounts related to trade receivables due to increased credit risk from uncertain economic conditions caused by COVID-19. Recently issued accounting pronouncements not yet adopted With the exception of the new standards discussed above, there have been no other recent accounting pronouncements or changes in accounting pronouncements during the three months ended March 31, 2020 , as compared to the recent accounting pronouncements described in the Company's Annual Report, that are of significance or potential significance to the Company.

Deferred Revenue and Performanc

Deferred Revenue and Performance Obligation (Notes)	3 Months Ended
	Mar. 31, 2020
Deferred Revenue and Performance Obligation [Abstract]
Deferred revenue and performance obligation [Text Block]	Deferred Revenue and Performance Obligations Deferred Revenue For the three months ended March 31, 2020 and 2019 , the Company recognized approximately $47.7 million and $38.3 million , respectively, in each case of revenue that was included in the deferred revenue balances at the beginning of the respective periods and primarily related to subscription services, maintenance and support, and services. Performance Obligations As of March 31, 2020 , the Company expects to recognize approximately $391.0 million of revenue from remaining performance obligations. The Company expects, based on the terms of the related, underlying contractual arrangements, to recognize revenue on approximately $191.6 million of these performance obligations over the next 12 months, with the balance recognized thereafter. However, as a result of uncertain economic conditions caused by COVID-19, the amount of revenue recognized from the Company's contractual remaining performance obligations could vary and be less than what the Company expects as revenue recognized could be delayed or not occur depending on the ongoing impact of COVID-19.

Disaggregation of Revenue (Note

Disaggregation of Revenue (Notes)	3 Months Ended
	Mar. 31, 2020
Disaggregation of Revenue [Abstract]
Disaggregation of Revenue [Text Block]	Disaggregation of Revenue Revenue by Geography The geographic information in the table below is presented for the three months ended March 31, 2020 and 2019 . The Company categorizes geographic revenues based on the location of the customer's headquarters. Because the Company's contracts are predominately denominated in U.S. dollars, it has limited exposure to foreign currency exchange risk as discussed under " Foreign Currency Exchange Risk " of Part I, Item 3 below. Three Months Ended March 31, 2020 2019 (in thousands) Revenue Percent Revenue Percent United States of America $ 21,800 33 % $ 19,780 35 % Europe 19,930 30 % 17,287 31 % The rest of the world 24,581 37 % 19,064 34 % Total revenue $ 66,311 100 % $ 56,131 100 %

Leases (Notes)

Leases (Notes)	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Lessee, Operating Leases [Text Block]	Leases The Company has operating leases for data centers, computer infrastructure, corporate offices and certain equipment. These leases have remaining lease terms ranging from 1 year to 13 years . Some of these leases include options to extend for up to 15 years, and some include options to terminate within 1 year. In February 2020, the Company entered into an agreement with a computer infrastructure vendor which resulted in future consideration to be paid by the Company for services provided. The Company accounted for this agreement as an operating lease and in result obtained a $1.5 million right-of-use asset in exchange for a new lease liability of the same amount at lease inception. As of March 31, 2020 , the Company did not have any finance leases. Supplemental information related to leases was as follows (in thousands): Three Months Ended March 31, 2020 2019 Cash paid for amounts included in the measurement of lease liability: Operating cash flows from operating leases $ 1,627 $ 1,016 As of March 31, 2020 , maturities of lease liabilities were as follows (in thousands): Year Ending December 31, Amount Remaining 2020 $ 5,567 2021 9,080 2022 8,447 2023 4,880 2024 4,930 2025 and thereafter 34,072 Total operating lease payments 66,976 Less: Imputed interest (23,703 ) Less: Anticipated lease incentive (14,207 ) Total operating lease liabilities $ 29,066

Earnings per Share (Note)

Earnings per Share (Note)	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2020 and 2019 : Three Months Ended March 31, (in thousands, except per share data) 2020 2019 Numerator: Net loss $ (22,735 ) $ (16,917 ) Denominator: Weighted average shares (basic) 43,102 37,623 Dilutive effect of potential common shares — — Weighted average shares (diluted) 43,102 37,623 Basic loss per share $ (0.53 ) $ (0.45 ) Diluted loss per share $ (0.53 ) $ (0.45 ) Dilutive potential common shares consist of shares issuable upon the exercise of stock options, settlement of stock appreciation rights ("SARs"), and the vesting of restricted stock units ("RSUs") and market stock units ("MSUs"). Potential common shares determined to be antidilutive and excluded from diluted weighted average shares outstanding were approximately 1.6 million and 2.0 million for the three months ended March 31, 2020 and 2019 , respectively. In addition, potential common shares related to the convertible notes determined to be antidilutive and excluded from diluted weighted average shares outstanding were 2.2 million for the three months ended March 31, 2020 .

Noncash Share-based Compensatio

Noncash Share-based Compensation (Note)	3 Months Ended
	Mar. 31, 2020
Noncash Share-based Compensation [Abstract]
Noncash Share-based Compensation	Noncash Share-based Compensation The Company's 2017 Equity Incentive Plan (as amended and restated, the "2017 Stock Plan") was approved by stockholders in May 2017 and reserved an aggregate amount of 2,500,000 shares for issuance. In May 2019, the shareholders approved an amendment to the 2017 Stock Plan which increased the aggregate amount of shares for issuance to a total of 4,550,000 . As of March 31, 2020 , 2,010,087 shares remain available for issuance under the 2017 Stock Plan. The following table presents the number of shares or units outstanding for each award type as of March 31, 2020 and December 31, 2019 , respectively, (in thousands): Award type March 31, 2020 December 31, 2019 Restricted stock units (time-based) 1,534 1,893 Restricted stock units (performance-based) 190 114 Stock appreciation rights 32 65 Market stock units 157 267 During the three months ended March 31, 2020 , the Company granted 459,499 RSUs (time-based) with a weighted average grant-date fair value of $66.22 per share. The Company also granted 76,200 performance-based RSUs ("PRSUs") with a weighted average grant-date fair value of $54.23 to certain executive employees during the three months ended March 31, 2020 . These PRSUs vest on January 13, 2023 and the actual number of PRSUs that will be eligible to vest is based upon achievement of certain internal performance metrics, as defined by each award's plan documents or individual award agreements. The maximum number of shares issuable upon vesting is 200% of the PRSUs initially granted. The Company did not grant any stock options, SARs or MSUs during the three months ended March 31, 2020 . Share-based compensation expense is allocated to expense categories on the unaudited condensed consolidated statements of comprehensive income (loss). The following table summarizes share-based compensation expense included in the Company's unaudited condensed consolidated statements of comprehensive income (loss) for the three months ended March 31, 2020 and 2019 : Three Months Ended March 31, 2020 2019 Share-based compensation: Cost of revenue $ 524 $ 538 Operating expenses: Selling and marketing 1,866 1,400 General and administrative 2,450 2,812 Research and development 1,507 1,296 Total included in operating expenses 5,823 5,508 Total share-based compensation expense $ 6,347 $ 6,046 At March 31, 2020 , the Company had an estimated $62.9 million of total unrecognized compensation costs related to share-based compensation arrangements. These costs will be recognized over a weighted average period of 3.0 years. The Company's Employee Stock Purchase Plan ("ESPP") provides for eligible employees to purchase shares on an after-tax basis in an amount between 1% and 10% of their annual pay: (i) on June 30 of each year at a 15% discount of the fair market value of the Company's common stock on January 1 or June 30, whichever is lower, and (ii) on December 31 of each year at a 15% discount of the fair market value of the Company's common stock on July 1 or December 31, whichever is lower. An employee may not purchase more than $5,000 in either of the six-month measurement periods described above or more than $10,000 annually. During the three months ended March 31, 2020 , the Company issued 26,774 shares under the ESPP. As of March 31, 2020 , 113,477 shares remain authorized and available for issuance under the ESPP. As of March 31, 2020 , the Company held approximately $0.7 million on behalf of employees for future purchases under the ESPP, and this amount was recorded in accrued payroll and other employee benefits in the Company's unaudited condensed consolidated balance sheet.

Convertible debt (Notes)

Convertible debt (Notes)	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Long-term Debt [Text Block]	Convertible Senior Notes The following is a summary of the Company's convertible senior notes as of March 31, 2020 (in thousands): Date of Issuance Unpaid Principal Balance Net Carrying Amount Contractual Interest Rates Current Noncurrent 1% Convertible Notes due in 2024 ("2024 Notes") May 2019 $ 143,750 $ — $ 112,406 1% The 2024 Notes, along with the previously issued convertible notes with original due dates in 2019 and 2047 (the "2019 Notes" and "2047 Notes," and together with the 2024 Notes, collectively, the "Notes"), are general unsecured obligations and rank senior in right of payment to all of the Company's indebtedness that is expressly subordinated in right of payment to the Notes, rank equally in right of payment with all of the Company's existing and future liabilities that are not so subordinated, are effectively junior to any of the Company's secured indebtedness to the extent of the value of the assets securing such indebtedness and are structurally subordinated to all indebtedness and other liabilities of the Company's subsidiaries (including trade payables but excluding intercompany obligations owed to the Company or its subsidiaries). The 2019 Notes and 2047 Notes were settled as of December 31, 2019 and no longer remain outstanding. Interest related to the 2024 Notes is payable semi-annually in arrears on May 15 and November 15 of each year, commencing on November 15, 2019. The 2024 Notes mature on May 15, 2024, unless redeemed or converted in accordance with their terms prior to such date. Each $1,000 of principal of the 2024 Notes will initially be convertible into 15.1394 shares of the Company’s common stock, which is equivalent to an initial conversion price of approximately $66.05 per share. The initial conversion price for the 2024 Notes is subject to adjustment upon the occurrence of certain specified events. As of March 31, 2020 , the 2024 Notes are not yet convertible and their remaining term is approximately 49 months . As of March 31, 2020 and December 31, 2019 , the fair value of the principal amount of the 2024 Notes was $121.5 million and $163.2 million , respectively. The estimated fair value was determined based on inputs that are observable in the market or that could be derived from, or corroborated with, observable market data, including the Company's stock price and interest rates, which represents level 2 in the fair value hierarchy. In accounting for the transaction costs for the 2024 Notes issuance, the Company allocated the costs incurred to the liability and equity components in proportion to the allocation of the proceeds from issuance to the liability and equity components. Issuance costs attributable to the liability component, totaling $3.4 million for the 2024 Notes are being amortized to expense over the expected life of the notes using the effective interest method. Issuance costs attributable to the equity component related to the conversion option, totaling $1.1 million for the 2024 Notes were netted with the equity component in stockholders' equity. The 2024 Notes consist of the following (in thousands): March 31, 2020 December 31, 2019 Liability component: Principal $ 143,750 $ 143,750 Less: debt discount and issuance cost, net of amortization (31,344 ) (33,046 ) Net carrying amount $ 112,406 $ 110,704 Equity component (1) $ 32,883 $ 32,883 (1) Recorded within additional paid-in capital in the unaudited condensed consolidated balance sheet. As of March 31, 2020 and December 31, 2019 , it included $32.9 million related to the 2024 Notes, which was net of $1.1 million issuance cost in equity. The following table sets forth total interest expense recognized related to the Notes (in thousands): Three Months Ended March 31, 2020 2019 Coupon interest $ 360 $ 1,250 Amortization of debt issuance costs 156 365 Amortization of debt discount 1,546 2,741 Total $ 2,062 $ 4,356 Note Hedge and Warrant Transactions Concurrently with the offering of the 2019 Notes, the Company entered into separate convertible note hedge (the "Note Hedge") and warrant (the "Warrant") transactions. Taken together, the purchase of the Note Hedge and the sale of the Warrant were intended to offset any actual dilution from the conversion of the 2019 Notes and to effectively increase the overall conversion price of the 2019 Notes from $33.79 to $45.48 per share. The Warrant was not part of the 2019 Notes or Note Hedge. Both the Note Hedge and Warrant were recorded as part of additional paid-in capital. As of December 31, 2019, the Note Hedge was settled through certain note hedge termination agreements and exercise of any remaining Note Hedge. In 2019, the Company entered into certain warrant termination agreements which terminated certain of the Warrants that were entered into by the Company in connection with the offering of the 2019 Notes. The remaining Warrants expire in August 2020 and, if exercised, will settle on a net share basis. Capped Call Transactions In May 2019, in connection with the offering of the 2024 Notes, the Company entered into privately negotiated capped call transactions (collectively, the "Capped Call") with certain option counterparties. The Capped Call transactions cover, subject to customary anti-dilution adjustments, the number of shares of the Company’s common stock initially underlying the 2024 Notes, at a strike price that corresponds to the initial conversion price of the 2024 Notes, also subject to adjustment, and are exercisable upon conversion of the 2024 Notes. The Capped Call transactions are intended to reduce potential dilution of the Company's common stock and/or offset any cash payments the Company will be required to make in excess of the principal amount upon any conversion of 2024 Notes, and to effectively increase the overall conversion price of the 2024 Notes from $66.05 to $101.62 per share. As the Capped Call transactions meet certain accounting criteria, they are recorded in stockholders’ equity and are not accounted for as derivatives. The cost of the Capped Call was $16.4 million and was recorded as part of additional paid-in capital.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation In the ordinary course of business, the Company regularly becomes involved in contract and other negotiations and, in more limited circumstances, becomes involved in legal proceedings, claims and litigation. The outcomes of these matters are inherently unpredictable. The Company is not currently involved in any outstanding litigation that it believes, individually or in the aggregate, will have a material adverse effect on its business, financial condition, results of operations or cash flows. Purchase commitments In the ordinary course of business, the Company enters into various purchase commitments for goods and services. In March 2019, the Company entered into a noncancelable agreement with a computing infrastructure vendor that amended the existing agreement dated June 2017. The amended agreement expires in March 2022. The purchase commitment as of March 31, 2020 was $58.4 million for the remaining period through the expiration of the agreement.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States ("GAAP") for interim financial reporting and applicable quarterly reporting regulations of the Securities and Exchange Commission ("SEC"). In management's opinion, the accompanying interim unaudited condensed consolidated financial statements include all adjustments necessary for a fair statement of the financial position of the Company as of March 31, 2020 , the results of operations for the three months ended March 31, 2020 and 2019 , cash flows for the three months ended March 31, 2020 and 2019 , and stockholders' equity for the three months ended March 31, 2020 and 2019 . Certain information and disclosures normally included in the notes to the annual financial statements prepared in accordance with GAAP have been omitted from these interim unaudited condensed consolidated financial statements pursuant to the rules and regulations of the SEC. Accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2019 ("Annual Report") filed with the SEC. The unaudited condensed consolidated balance sheet as of December 31, 2019 was derived from the Company's audited consolidated financial statements but does not include all disclosures required under GAAP. Certain prior year amounts have been reclassified for consistency with the current year presentation. This reclassification had no effect on the reported results of operations. License revenue and license cost of revenue are now combined with subscription revenue and subscription cost of revenue, respectively.
Accounting Changes [Text Block]	Changes in accounting policies There have been no material changes in the Company’s significant accounting policies and their application as compared to the significant accounting policies described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, except for the Company's adoption of certain accounting standards described in more detail under " Recently adopted accounting pronouncements " in this Note 2 below.
Fair value measurement	Fair value measurement The Company's financial assets that are included in cash and cash equivalents and that are measured at fair value on a recurring basis consisted of $239.0 million and $273.1 million at March 31, 2020 and December 31, 2019 , respectively, and were invested in treasury money market funds. The fair value of the treasury money market funds is determined based on quoted market prices, which represents level 1 in the fair value hierarchy as defined by ASC 820.
Trade and Other Accounts Receivable, Unbilled Receivables, Policy [Policy Text Block]	Trade and other receivables Trade and other receivables are primarily comprised of trade receivables, net of allowance for doubtful accounts, contract assets and unbilled receivables. The Company records trade accounts receivable for its unconditional rights to consideration arising from the Company's performance under contracts with customers. The Company's standard billing terms are that payment is due upon receipt of invoice, payable generally within thirty to sixty days. The carrying value of such receivables, net of the allowance for doubtful accounts, represents their estimated net realizable value. When developing its estimate of expected credit losses on trade and other receivables, the Company considers the available information relevant to assessing the collectability of cash flows, which includes a combination of both internal and external information relating to past events, current conditions, and future forecasts as well as relevant qualitative and quantitative factors that relate to the environment in which the Company operates. Contract assets represent conditional rights to consideration that have been recognized as revenue in advance of billing the customer. Unbilled receivables represent unconditional rights to consideration arising from contingent revenue that have been recognized as revenue in advance of billing the customer. There are no comparable recent events that provide guidance as to the effect of the spread of COVID-19 as a global pandemic. As a result, the impact of COVID-19 is highly uncertain and subject to change. The Company does not yet know the full extent of the impact from COVID-19 to the Company's business operations or the global economy as a whole; however, the impact could have an adverse effect on the Company's customers and inherently the related receivables.
Revenue Recognition, Customer Acquisitions [Policy Text Block]	Deferred costs Sales commissions earned by the Company's sales representatives are considered incremental and recoverable costs of obtaining a customer contract. Sales commissions are deferred and amortized on a straight-line basis over the period of benefit, which the Company has determined to be five to eight years. The Company determined the period of benefit by taking into consideration its customer contracts, expected renewals of those customer contracts (as the Company currently does not pay an incremental sales commission), the Company's technology and other factors. The Company also defers amounts earned by employees other than sales representatives who earn incentive payments under compensation plans that are also tied to the value of customer contracts acquired. Deferred costs were $20.5 million and $21.2 million as of March 31, 2020 and December 31, 2019 , respectively. Amortization expense for the deferred costs was $1.4 million and $1.1 million for the three months ended March 31, 2020 and 2019 , respectively.
Deferred Charges, Policy [Policy Text Block]	Deferred implementation costs The Company capitalizes certain contract fulfillment costs, including personnel and other costs (such as hosting, employee salaries, benefits and payroll taxes), that are associated with arrangements where professional services are not distinct from other undelivered obligations in its customer contracts. The Company analyzes implementation costs and capitalizes those costs that are directly related to customer contracts, that are expected to be recoverable, and that enhance the resources which will be used to satisfy the undelivered performance obligations in those contracts. Deferred implementation costs are amortized ratably over the remaining contract term once the revenue recognition criteria for the respective performance obligation has been met and revenue recognition commences. Deferred implementation costs were $4.1 million and $4.4 million as of March 31, 2020 and December 31, 2019 , respectively. Amortization expense for the deferred implementation costs was $0.5 million and $0.2 million for the three months ended March 31, 2020 and 2019 , respectively. Deferred implementation costs are included in prepaid and other current assets and other assets, noncurrent in the unaudited condensed consolidated balance sheets. Amortization of deferred implementation costs is included in cost of subscription and cost of services revenues in the accompanying unaudited condensed consolidated statements of comprehensive income (loss).
New Accounting Pronouncements, Policy [Policy Text Block]	Recently adopted accounting pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ("Topic 326") , in order to improve financial reporting of expected credit losses on financial instruments and other commitments to extend credit. Topic 326 requires that an entity measure and recognize expected credit losses for financial assets held at amortized cost and replaces the incurred loss impairment methodology in current GAAP with a methodology that requires consideration of a broader range of information to estimate credit losses. The Company adopted Topic 326 as of January 1, 2020 using the modified retrospective method and there was no material impact on the Company's unaudited condensed consolidated financial statements as of the adoption date. The Company recognized a $2.6 million provision for credit losses in the first quarter of 2020 representing the Company’s estimate of additional allowance for doubtful accounts related to trade receivables due to increased credit risk from uncertain economic conditions caused by COVID-19. Recently issued accounting pronouncements not yet adopted With the exception of the new standards discussed above, there have been no other recent accounting pronouncements or changes in accounting pronouncements during the three months ended March 31, 2020 , as compared to the recent accounting pronouncements described in the Company's Annual Report, that are of significance or potential significance to the Company.

Disaggregation of Revenue (Tabl

Disaggregation of Revenue (Tables)	3 Months Ended
	Mar. 31, 2020
Revenue by Geography [Abstract]
Schedule of Disaggregation Of Revenue [Table Text Block]	The geographic information in the table below is presented for the three months ended March 31, 2020 and 2019 . The Company categorizes geographic revenues based on the location of the customer's headquarters. Because the Company's contracts are predominately denominated in U.S. dollars, it has limited exposure to foreign currency exchange risk as discussed under " Foreign Currency Exchange Risk " of Part I, Item 3 below. Three Months Ended March 31, 2020 2019 (in thousands) Revenue Percent Revenue Percent United States of America $ 21,800 33 % $ 19,780 35 % Europe 19,930 30 % 17,287 31 % The rest of the world 24,581 37 % 19,064 34 % Total revenue $ 66,311 100 % $ 56,131 100 %

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Supplemental Lease Information [Table Text Block]	Supplemental information related to leases was as follows (in thousands): Three Months Ended March 31, 2020 2019 Cash paid for amounts included in the measurement of lease liability: Operating cash flows from operating leases $ 1,627 $ 1,016
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	As of March 31, 2020 , maturities of lease liabilities were as follows (in thousands): Year Ending December 31, Amount Remaining 2020 $ 5,567 2021 9,080 2022 8,447 2023 4,880 2024 4,930 2025 and thereafter 34,072 Total operating lease payments 66,976 Less: Imputed interest (23,703 ) Less: Anticipated lease incentive (14,207 ) Total operating lease liabilities $ 29,066

Earnings per Share (Table)

Earnings per Share (Table)	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2020 and 2019 : Three Months Ended March 31, (in thousands, except per share data) 2020 2019 Numerator: Net loss $ (22,735 ) $ (16,917 ) Denominator: Weighted average shares (basic) 43,102 37,623 Dilutive effect of potential common shares — — Weighted average shares (diluted) 43,102 37,623 Basic loss per share $ (0.53 ) $ (0.45 ) Diluted loss per share $ (0.53 ) $ (0.45 )

Noncash Share-based Compensat_2

Noncash Share-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2020
Noncash Share-based Compensation [Abstract]
Awards outstanding [Table Text Block]	The following table presents the number of shares or units outstanding for each award type as of March 31, 2020 and December 31, 2019 , respectively, (in thousands): Award type March 31, 2020 December 31, 2019 Restricted stock units (time-based) 1,534 1,893 Restricted stock units (performance-based) 190 114 Stock appreciation rights 32 65 Market stock units 157 267
Schedule of Share-based Compensation Expense	The following table summarizes share-based compensation expense included in the Company's unaudited condensed consolidated statements of comprehensive income (loss) for the three months ended March 31, 2020 and 2019 : Three Months Ended March 31, 2020 2019 Share-based compensation: Cost of revenue $ 524 $ 538 Operating expenses: Selling and marketing 1,866 1,400 General and administrative 2,450 2,812 Research and development 1,507 1,296 Total included in operating expenses 5,823 5,508 Total share-based compensation expense $ 6,347 $ 6,046

Convertible debt (Tables)

Convertible debt (Tables)	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Schedule of Debt [Table Text Block]	The following is a summary of the Company's convertible senior notes as of March 31, 2020 (in thousands): Date of Issuance Unpaid Principal Balance Net Carrying Amount Contractual Interest Rates Current Noncurrent 1% Convertible Notes due in 2024 ("2024 Notes") May 2019 $ 143,750 $ — $ 112,406 1%
Convertible Debt [Table Text Block]	The 2024 Notes consist of the following (in thousands): March 31, 2020 December 31, 2019 Liability component: Principal $ 143,750 $ 143,750 Less: debt discount and issuance cost, net of amortization (31,344 ) (33,046 ) Net carrying amount $ 112,406 $ 110,704 Equity component (1) $ 32,883 $ 32,883 (1) Recorded within additional paid-in capital in the unaudited condensed consolidated balance sheet. As of March 31, 2020 and December 31, 2019 , it included $32.9 million related to the 2024 Notes, which was net of $1.1 million issuance cost in equity. The following table sets forth total interest expense recognized related to the Notes (in thousands): Three Months Ended March 31, 2020 2019 Coupon interest $ 360 $ 1,250 Amortization of debt issuance costs 156 365 Amortization of debt discount 1,546 2,741 Total $ 2,062 $ 4,356

Summary of Significant Accoun_3

Summary of Significant Accounting Policies Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Summary of Significant Accounting Policies [Line Items]
Treasury money market funds, at fair value	$ 239		$ 273.1
Deferred Costs	20.5		21.2
Amortization of Deferred Charges	1.4	$ 1.1
Capitalized Contract Cost, Net	4.1		$ 4.4
Capitalized Contract Cost, Amortization	$ 0.5	$ 0.2

Summary of Significant Accoun_4

Summary of Significant Accounting Policies New Accounting Pronouncements (Details) $ in Millions	Mar. 31, 2020USD ($)
Accounting Standards Update 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss	$ 2.6

Deferred Revenue and Performa_2

Deferred Revenue and Performance Obligation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Deferred Revenue and Performance Obligation [Abstract]
Deferred Revenue, Revenue Recognized	$ 47.7	$ 38.3
Revenue, Remaining Performance Obligation, Amount	391
Revenue Remaining Performance Obligation, to be recognized within 12 months	$ 191.6

Disaggregation of Revenue Reven

Disaggregation of Revenue Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues	$ 66,311	$ 56,131
Percentage of total revenue	100.00%	100.00%
UNITED STATES
Revenues	$ 21,800	$ 19,780
Percentage of total revenue	33.00%	35.00%
Europe [Member]
Revenues	$ 19,930	$ 17,287
Percentage of total revenue	30.00%	31.00%
The rest of the world [Member]
Revenues	$ 24,581	$ 19,064
Percentage of total revenue	37.00%	34.00%

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Option to Renew	15 years
Lessee, Operating Lease, Termination Option	1 year
Right-of-use Asset Obtained in Exchange for Operating Lease Liability	$ 1,500
Operating Lease, Payments	$ 1,627	$ 1,016
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	13 years

Leases Schedule of lease liabil

Leases Schedule of lease liability maturities (Details) $ in Thousands	Mar. 31, 2020USD ($)
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Remaining 2019	$ 5,567
2020	9,080
2021	8,447
2022	4,880
2023	4,930
2024 and thereafter	34,072
Operating Leases, Payments Due	66,976
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(23,703)
Lessee, Operating Lease, Anticipated Incentives	(14,207)
Operating Lease, Liability	$ 29,066

Earnings per Share (Details)

Earnings per Share (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Payment Arrangement [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive potential common shares excluded from computation of earnings per share	1.6	2
Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive potential common shares excluded from computation of earnings per share	2.2

Earnings per Share Basis and Di

Earnings per Share Basis and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator
Net income (loss)	$ (22,735)	$ (16,917)
Denominator
Weighted average shares (basic)	43,102	37,623
Dilutive effect of potential common shares	0	0
Weighted average shares (diluted)	43,102	37,623
Basic Earnings Per Share	$ (0.53)	$ (0.45)
Diluted earnings per share	$ (0.53)	$ (0.45)

Noncash Share-based Compensat_3

Noncash Share-based Compensation (Details)	3 Months Ended
	Mar. 31, 2020USD ($)$ / sharesshares
Noncash Share-based Compensation (Narrative) [Line Items]
Unrecognized compensation cost related to share-based compensation | $	$ 62,900,000
Weighted average period to recognize cost, in years	3 years
Share-based compensation arrangement by share-based payment, Minimum Employee Subscription rate	1.00%
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate	10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date	15.00%
Maximum Amount Contributable by employees under ESPP- Half yearly | $	$ 5,000
Maximum Amount Contributable By Employees Under ESPP- Annually | $	$ 10,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans	26,774
ESPP contributions by Employees | $	$ 700,000
RSUs
Noncash Share-based Compensation (Narrative) [Line Items]
Awards, other than options, granted in period	459,499
Weighted average grant date fair value, per share, of awards granted in period | $ / shares	$ 66.22
Employee Stock [Member]
Noncash Share-based Compensation (Narrative) [Line Items]
Shares available for future grants	113,477
Performance Shares [Member]
Noncash Share-based Compensation (Narrative) [Line Items]
Awards, other than options, granted in period	76,200
Weighted average grant date fair value, per share, of awards granted in period | $ / shares	$ 54.23
2017 Equity Incentive Plan [Member] [Member]
Noncash Share-based Compensation (Narrative) [Line Items]
Shares reserved for issuance under Plan	2,500,000
Shares available for future grants	2,010,087
2017 Amended Equity Incentive Plan [Member]
Noncash Share-based Compensation (Narrative) [Line Items]
Shares reserved for issuance under Plan	4,550,000

Noncash Share-based Compensat_4

Noncash Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 6,347	$ 6,046
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	524	538
Selling and Marketing Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,866	1,400
General and Administrative Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	2,450	2,812
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,507	1,296
Operating Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 5,823	$ 5,508

Noncash Share-based Compensat_5

Noncash Share-based Compensation Awards outstanding (Details) - shares shares in Thousands	Mar. 31, 2020	Dec. 31, 2019
Restricted Stock Unit - time based [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	1,534	1,893
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	190	114
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	32	65
Market Share Units (MSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	157	267

Convertible debt (Details)

Convertible debt (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)$ / shares	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 143,750		$ 143,750
Convertible Debt, Noncurrent	112,406		110,704
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	31,344		33,046
Convertible Debt	112,406		110,704
Debt Instrument, Convertible, Carrying Amount of Equity Component	32,883		32,883
Debt Instrument, Periodic Payment, Interest	360	$ 1,250
Amortization of Financing Costs	156	365
Amortization of Debt Discount (Premium)	1,546	2,741
Interest Expense, Debt	2,062	$ 4,356
Debt Instrument, Fair Value Disclosure	121,500		$ 163,200
Purchase of convertible bond hedge	$ 16,400
Notes due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Convertible, Stock Price Trigger | $ / shares	$ 33.79
Investment Warrants, Exercise Price | $ / shares	$ 45.48
Notes due 2024 [Member]
Debt Instrument [Line Items]
Debt Issuance Cost	$ 3,400
Convertible debt, issuance cost, equity component	$ 1,100
Debt Instrument, Convertible, Conversion Ratio	15.1394
Debt Instrument, Convertible, Stock Price Trigger | $ / shares	$ 66.05
Debt Instrument, Convertible, Conversion Price | $ / shares	$ 101.62
Debt Instrument, Face Amount	$ 143,750
Convertible Debt, Current	0
Convertible Debt, Noncurrent	112,406
Debt Instrument, Convertible, Carrying Amount of Equity Component	$ 32,900
Debt Instrument, Convertible, Remaining Discount Amortization Period	49 months
Debt Instrument, Interest Rate, Stated Percentage	1.00%

Commitments and Contingencies P

Commitments and Contingencies Purchase commitments (Details) $ in Millions	Mar. 31, 2020USD ($)
Long-term Purchase Commitment [Line Items]
Purchase Obligation	$ 58.4