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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement [Abstract]  
Stock-Based Compensation Expense for Employees and Non-Employees
Total share-based compensation expense recorded for employees and non-employees is as follows (in thousands):
 Three Months Ended
March 31,
 20222021
Cost of revenues$623 $362 
Research and development11,776 7,959 
Sales and marketing4,386 2,919 
General and administrative16,299 11,860 
Total share-based compensation expense$33,084 $23,100 
Summary of Restricted Stock Unit Activity
Activity for RSUs and PSUs is as follows:
 RSUs and PSUs Outstanding
 Shares OutstandingWeighted Average Grant Date Fair Value
Balance at December 31, 20218,171,462 $46.36 
Granted2,472,933 33.21 
Released(642,952)68.70 
Forfeited(598,243)44.26 
Balance at March 31, 20229,403,200 $41.51