Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v3.8.0.1
Subsequent Events - Additional Information (Detail) - USD ($)
12 Months Ended
Feb. 26, 2018
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Subsequent Event [Line Items]                
Weighted average exercise price, granted           $ 7.60 $ 7.14 $ 4.90
Weighted average grant date fair value, Granted           $ 2.26    
Certain Executive Officers and Key Employees [Member] | Scenario, Forecast [Member] | 2018 [Member]                
Subsequent Event [Line Items]                
Expected stock option compensation expense increase         $ 2,100,000      
Certain Executive Officers and Key Employees [Member] | Scenario, Forecast [Member] | 2019 [Member]                
Subsequent Event [Line Items]                
Expected stock option compensation expense increase       $ 1,400,000        
Certain Executive Officers and Key Employees [Member] | Scenario, Forecast [Member] | 2020 [Member]                
Subsequent Event [Line Items]                
Expected stock option compensation expense increase     $ 566,000          
Certain Executive Officers and Key Employees [Member] | Scenario, Forecast [Member] | 2021 [Member]                
Subsequent Event [Line Items]                
Expected stock option compensation expense increase   $ 71,000            
Subsequent Event [Member] | Certain Executive Officers and Key Employees [Member]                
Subsequent Event [Line Items]                
Options, number granted 1,585,000              
Weighted average exercise price, granted $ 8.03              
Weighted average grant date fair value, Granted $ 2.60              
Total fair value of options granted $ 4,100,000