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Share-based Compensation (Tables)
 6 Months Ended
Jun. 30, 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 June 30,Six Months Ended June 30,
 2024202320242023
Research and development$2,568 $3,670 $5,913 $6,771 
Selling, general and administrative6,903 5,952 13,432 10,817 
Total share-based compensation expense$9,471 $9,622 $19,345 $17,588 
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 June 30,Six Months Ended June 30,
 2024202320242023
Stock options$3,894 $4,190 $8,193 $7,645 
RSUs, PSUs and ESPP5,577 5,432 11,152 9,943 
Total share-based compensation expense$9,471 $9,622 $19,345 $17,588 
Schedule of assumptions used in Black-Scholes model The assumptions used in the Black-Scholes Model were as follows:
Three Months Ended June 30,Six Months Ended June 30,
 2024202320242023
Expected volatility
40.01 - 40.07%
40.26 - 40.72%
40.01 - 40.08%
39.68 - 40.72%
Average expected term (in years)5.45.05.04.8
Risk-free interest rate
4.64 - 4.70%
3.37 - 3.70%
3.80 - 4.70%
3.37 - 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):
June 30, 2024
 Unrecognized
Expense
Remaining
Weighted-Average
Recognition Period
(in years)
Stock options$35,381 2.56
RSUs50,035 2.92
PSUs9,577 2.05
ESPP253 0.40