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Noncash Share-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2021
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 September 30, 2021 and December 31, 2020, respectively, (in thousands):
Award type |  | September 30, 2021 |  | December 31, 2020
Restricted stock units (time-based) |  | 1,822 |  |  | 1,802 |
Restricted stock units (performance-based) |  | 140 |  |  | 162 |
Stock appreciation rights |  | — |  |  | 28 |
Market stock units |  | 126 |  |  | 111 |
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 and nine months ended September 30, 2021 and 2020:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Share-based compensation: |  |  |  |  |  |  |
Cost of revenue | $ | 951 |  |  | $ | 519 |  |  | $ | 2,753 |  |  | $ | 1,545 |
Operating expenses: |  |  |  |  |  |  |
Selling and marketing | 2,600 |  |  | 1,727 |  |  | 7,334 |  |  | 5,558 |
Research and development | 1,924 |  |  | 1,539 |  |  | 5,867 |  |  | 4,414 |
General and administrative | 3,159 |  |  | 2,593 |  |  | 9,456 |  |  | 6,960 |
Total included in operating expenses | 7,683 |  |  | 5,859 |  |  | 22,657 |  |  | 16,932 |
Total share-based compensation expense | $ | 8,634 |  |  | $ | 6,378 |  |  | $ | 25,410 |  |  | $ | 18,477 |
Market Stock Units Valuation Assumptions | The assumptions used to value the MSUs granted during the nine months ended September 30, 2021 were as follows:
| September 30, 2021
Volatility | 53.29 | %
Risk-free interest rate | 0.22 | %
Expected award life in years | 2.97
Dividend yield | —

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- Definition Schedule of awards outstanding for each share-based compansation award type. + References No definition available. + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of Market Stock Units which are performance-based awards that vest based upon the Company's relative shareholder return. + References No definition available. + Details
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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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