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Stock-Based Compensation Expense (Tables) | 3 Months Ended
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Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | Stock-based compensation expense before income tax expense for the three-month periods ended March 31, 2023 and 2022 consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Three Months Ended
​ | ​ | ​ | March 31,
​ |  |  | 2023 |  | 2022
Cost of sales | ​ | ​ | ​ | ​ | ​ | ​ | ​
Nonqualified stock options | ​ | ​ | $ | 441 | ​ | $ | 588
Research and development | ​ | ​ |  | ​ | ​ | ​ | ​
Nonqualified stock options | ​ | ​ | ​ | 428 | ​ |  | 486
Selling, general and administrative | ​ | ​ |  | ​ | ​ | ​ | ​
Nonqualified stock options | ​ | ​ | ​ | 1,370 | ​ |  | 1,924
Performance-based restricted stock units | ​ | ​ | ​ | 815 | ​ | ​ | 815
Restricted stock units | ​ | ​ | ​ | 444 | ​ | ​ | 399
Cash-settled performance-based share-based awards ("Liability Awards") | ​ | ​ | ​ | 471 | ​ | ​ | 430
Total selling, general and administrative | ​ | ​ | ​ | 3,100 | ​ | ​ | 3,568
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Stock-based compensation expense before taxes | ​ | ​ | $ | 3,969 | ​ | $ | 4,642
​
Stock Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | March 31,
​ | ​ | 2023 | ​ | 2022
Risk-free interest rate |  | 3.7% - 4.5% |  | 1.4% - 1.8%
Expected option term |  | 4.0 years |  | 4.0 years
Expected dividend yield |  | — |  | —
Expected price volatility |  | 47.1% |  | 46.2% - 46.6%
​
Stock-Settled Performance-Based Restricted Stock Units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | March 31,
​ | ​ | 2023 | ​ | 2022
Risk-free interest rate |  | 4.6% |  | 1.6%
Performance period |  | 2.8 years |  | 2.8 years
Expected dividend yield |  | — |  | —
Expected price volatility |  | 32.6% |  | 42.6%
​

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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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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