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Stockholders' Equity - Outstanding and Reserved Shares of Common Stock for Future Issuance (Detail) - shares
6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Stock plans:      
Options outstanding (in shares) 484,000 454,000 522,000
Total shares of common stock reserved for future issuance (in shares) 27,300,000    
2021 Equity Incentive Plan      
Stock plans:      
Total shares of common stock reserved for future issuance (in shares) 9,985,000    
Amended and Restated 2012 Employee Stock Purchase Plan      
Stock plans:      
Total shares of common stock reserved for future issuance (in shares) 9,526,000    
Options outstanding      
Stock plans:      
Options outstanding (in shares) 484,000    
RSUs      
Stock plans:      
RSUs (in shares) 7,305,000 8,047,000 7,362,000
Performance-based RSUs      
Stock plans:      
Number of shares eligible to vest (percent) 100.00%