Quarterly report pursuant to Section 13 or 15(d)

Stock Plans - Additional Information (Detail)

v3.21.2
Stock Plans - Additional Information (Detail) - USD ($)
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Employee Stock Purchase Plan [Member]    
Class Of Stock [Line Items]    
Common stock were purchased under ESPP 67,068  
Accrued employee contributions $ 223,000  
Timebased Stock Option [Member]    
Class Of Stock [Line Items]    
Options granted 200,955  
Stock Awards [Member]    
Class Of Stock [Line Items]    
Unrecognized cost of share-based compensation awards $ 0  
Restricted Stock Units [Member]    
Class Of Stock [Line Items]    
Unrecognized cost of share-based compensation awards $ 11,705,000  
Cost of share-based compensation awards, recognition period 9 months 18 days  
Performance-based Stock Options [Member]    
Class Of Stock [Line Items]    
Total grant date fair value of stock options granted $ 0 $ 0
Total grant date fair value of stock options vested   0
Unrecognized compensation expense related to stock options 16,268,000  
Aggregate intrinsic value of the options exercised $ 6,517,000 0
Stock Options [Member]    
Class Of Stock [Line Items]    
Options granted 200,955  
Cost of share-based compensation awards, recognition period 3 years  
Total grant date fair value of stock options vested $ 1,313,000 4,067,000
Unrecognized compensation expense related to stock options 8,137,000  
Aggregate intrinsic value of the options exercised $ 8,198,000 $ 177,000
Weighted Average Grant Date Fair Value, Granted $ 23.09 $ 2.06