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Share-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2023
Share-Based Payment Arrangement, Noncash Expense [Abstract] |
Schedule of share-based compensation expense | The following table summarized share-based compensation expense included in our condensed consolidated statements of income related to share-based awards (in thousands):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
Research and development |  | $ | 3,159 |  |  | $ | 2,695 |  |  | $ | 9,931 |  |  | $ | 7,168 |
Selling, general and administrative |  | 6,208 |  |  | 4,102 |  |  | 17,025 |  |  | 10,006 |
Total share-based compensation expense |  | $ | 9,367 |  |  | $ | 6,797 |  |  | $ | 26,956 |  |  | $ | 17,174 |
Schedule of share-based compensation expense by type | Share-based compensation expense by type of share-based award (in thousands):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
Stock options |  | $ | 4,290 |  |  | $ | 2,801 |  |  | $ | 11,935 |  |  | $ | 7,924 |
RSUs, PSUs and ESPP |  | 5,077 |  |  | 3,996 |  |  | 15,021 |  |  | 9,250 |
Total share-based compensation expense |  | $ | 9,367 |  |  | $ | 6,797 |  |  | $ | 26,956 |  |  | $ | 17,174 |
Schedule of assumptions used in Black-Scholes model | The assumptions used in the Black-Scholes model were as follows:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
Expected volatility |  | 40.70 - 40.82% |  | 40.37 - 50.80% |  | 39.68-40.82% |  | 40.37-50.80%
Average expected term (in years) |  | 4.9 |  | 4.7 |  | 4.8 |  | 4.7
Risk-free interest rate |  | 4.19 - 4.29% |  | 2.66 - 3.39% |  | 3.37-4.29% |  | 1.37-3.39%
Expected dividend yield |  | — |  |  | — |  |  | — |  |  | — |
Schedule of unrecognized estimated compensation cost by type | Total unrecognized estimated compensation cost by type of award and the weighted-average remaining requisite service period over which such expense is expected to be recognized was as follows (in thousands, unless otherwise noted):
|  | September 30, 2023
|  | Unrecognized Expense |  | Remaining Weighted-Average Recognition Period (years)
Stock options |  | $ | 41,893 |  |  | 2.75
RSUs |  | 36,721 |  |  | 2.51
PSUs |  | 7,153 |  |  | 1.68
ESPP |  | 110 |  |  | 0.21

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + 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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + 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 -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (i) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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