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Share-based Compensation (Tables)
 3 Months Ended
Mar. 31, 2024
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 March 31,
 20242023
Research and development$3,345 $3,101 
Selling, general and administrative6,529 4,865 
Total share-based compensation expense$9,874 $7,966 
Schedule of share-based compensation expense by type
Share-based compensation expense by type of share-based award was as follows (in thousands):
Three Months Ended March 31,
 20242023
Stock options$4,299 $3,455 
RSUs, PSUs and ESPP5,575 4,511 
Total share-based compensation expense$9,874 $7,966 
Schedule of assumptions used in Black-Scholes model The assumptions used in the Black-Scholes Model were as follows:
Three Months Ended March 31,
 20242023
Expected volatility
40.02 - 40.08%
39.68 - 39.98%
Average expected term (in years)5.04.8
Risk-free interest rate
3.80 - 4.28%
3.48 - 4.27%
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):
March 31, 2024
 Unrecognized
Expense
Remaining
Weighted-Average
Recognition Period
(in years)
Stock options$42,038 2.70
RSUs56,513 3.05
PSUs11,543 2.30
ESPP118 0.21