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Share-based Compensation - Summary of Additional RSA Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Weighted-average grant date fair value per share $ 0 $ 15.86    
Fair value of RSAs that vested $ 0 $ 0    
Restricted Stock [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Weighted-average grant date fair value per share $ 46.55 $ 15.58 $ 30.33 $ 19.39
Fair value of RSAs that vested $ 1,012 $ 819 $ 1,052 $ 1,121