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Equity Plans and Stock-Based Compensation - Option Activity under Stock-Based Compensation Plans (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Shares Underlying Outstanding Options    
Beginning balance 10,120  
Options granted 1,505  
Options exercised (240)  
Options forfeited (unvested) (2)  
Options expired (vested) (89)  
Ending balance 11,294 10,120
Vested and expected to vest as of March 31, 2024 11,050  
Exercisable as of March 31, 2024 7,653  
Weighted-Average Exercise Price Per Share    
Beginning balance $ 10.78  
Options granted 12.46  
Options exercised 6.82  
Options forfeited (unvested) 9.52  
Options expired (vested) 15.46  
Ending balance 11.05 $ 10.78
Vested and expected to vest as of March 31, 2024 11.03  
Exercisable as of March 31, 2024 $ 10.56  
Weighted-Average Remaining Contractual Term (years)    
Weighted - Average Remaining Contractual Term (years), balance 4 years 4 months 20 days 4 years 2 months 4 days
Vested and expected to vest as of March 31, 2024 4 years 4 months 6 days  
Exercisable as of March 31, 2024 3 years 7 months 2 days  
Aggregate Intrinsic Value    
Balance as of December 31, 2023 $ 37,388  
Balance as of March 31, 2024 23,032 $ 37,388
Vested and expected to vest as of March 31, 2024 22,954  
Exercisable as of March 31, 2024 $ 20,912