Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - Narrative (Detail)

v3.21.2
Stock Based Compensation - Narrative (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock compensation expense (gain) $ 5,200     $ 2,700     $ 12,400 $ 7,500
Unrecognized stock-based compensation cost 14,000           $ 14,000  
Unrecognized share-based compensation expense, weighted-average recognition period (in years)             2 years 2 months 12 days  
Common stock issuance ESPP Plan 1,020 $ 1,245 $ 1,024 $ 808 $ 928 $ 796    
Restricted Stock                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Unrecognized stock-based compensation cost $ 12,000           $ 12,000  
Unrecognized share-based compensation expense, weighted-average recognition period (in years)             1 year 9 months 18 days  
Employee Stock Purchase Plan                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Employee stock purchase plan, discount rate (as a percent)             15.00%  
Common stock issuance ESPP Plan (in shares) 27,210     29,853     82,966 105,241
Common stock issuance ESPP Plan $ 200     $ 200     $ 800 $ 600