XML 37 R26.htm IDEA: XBRL DOCUMENT v3.22.2.2
Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of Allocated Employee Stock-Based Compensation Expense
We allocated the stock-based compensation expense for our equity incentive plans and our Employee Stock Purchase Plan (ESPP) as follows (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2022202120222021
Research and development$16,438 $11,487 $34,886 $37,550 
Selling, general and administrative20,899 22,479 46,832 59,104 
Total stock-based compensation expense$37,337 $33,966 $81,718 $96,654 
Stock-based compensation for each type of award under our equity incentive plans and ESPP were as follows (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2022202120222021
Stock options$3,299 $4,607 $10,470 $15,203 
Restricted stock units22,233 13,721 54,234 40,802 
Performance stock units11,331 14,971 14,621 37,616 
ESPP474 667 2,393 3,033 
Total stock-based compensation expense$37,337 $33,966 $81,718 $96,654 
Schedule of Share-Based Payment Award, Equity Instruments Other Than Options, Valuation Assumptions We used a Monte Carlo simulation model and the following assumptions to determine the grant date fair value of $33.17 per share for the TSR-based RSUs:
Fair value of the Company’s common stock on grant date
$20.70 
Expected volatility
46.85 %
Risk-free interest rate
1.59 %
Dividend yield
— %