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Summary of Company's Stock Option Activity (Detail)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2023
USD ($)
$ / shares
shares
Number of Shares  
Options Outstanding, Beginning Balance | shares 16,339,465
Granted | shares 3,157,634
Exercised | shares (1,046,035)
Cancelled/forfeited | shares (1,825,035)
Options Outstanding, Ending Balance | shares 16,626,029
Vested at December 31, 2022 | shares 11,152,607
Unvested at December 31, 2022 | shares 5,473,422
Weighted Average Exercise Prices  
Weighted Average Exercise Prices, Beginning Balance | $ / shares $ 29.83
Weighted Average Exercise Prices, granted | $ / shares 21.99
Weighted Average Exercise Prices, exercised | $ / shares 19.42
Weighted Average Exercise Prices, Cancelled/forfeited | $ / shares 32.07
Weighted Average Exercise Prices, Ending Balance | $ / shares 28.75
Weighted Average Exercise Prices, Vested | $ / shares 31.12
Weighted Average Exercise Prices, Unvested | $ / shares $ 23.92
Weighted average remaining contractual term, Outstanding 5 years 7 months 6 days
Weighted average remaining contractual term, Vested 4 years 2 months 12 days
Weighted average remaining contractual term, Unvested 8 years 4 months 24 days
Aggregate Intrinsic Value, Outstanding | $ $ 90,962
Aggregate Intrinsic Value, Vested | $ 44,951
Aggregate Intrinsic Value, Unvested | $ $ 46,012