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Equity Plans - Schedule of Activity Related to Restricted Stock Units (Detail)
6 Months Ended
Jun. 30, 2022
$ / shares
shares
Schedule Of Share Based Compensation Restricted Stock And Restricted Stock Units Activity [Line Items]  
Beginning balance 5,388,455
Number of Restricted Stock Units, Granted 9,885,413
Number of Restricted Stock Units, Vested (2,630,699)
Number of Restricted Stock Units, Forfeited (792,643)
Ending balance 11,850,526
Weighted-Average Fair Value Per Share, Granted | $ / shares $ 4.89