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Stockholders’ Equity (Tables)
3 Months Ended
Mar. 31, 2023
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 March 31,
20232022
Research and development$3,252 $8,899 
Selling, general and administrative13,409 10,860 
Total stock-based compensation expense$16,661 $19,759 
Stock-based compensation for each type of award under our equity incentive plans and ESPP were as follows (in thousands):
Three Months Ended March 31,
20232022
Stock options$2,207 $3,678 
Restricted stock units12,607 13,073 
Performance stock units794 1,709 
ESPP1,053 1,299 
Total stock-based compensation expense$16,661 $19,759