Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation - Summary of Stock Option Activity (Detail)

v3.20.1
Stock Based Compensation - Summary of Stock Option Activity (Detail) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Options, Granted 0 0
Employee Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Options, Outstanding 656,494  
Number of Options, Granted 0  
Number of Options, Exercised (80,201)  
Number of Options, Forfeited (25,308)  
Number of Options, Outstanding 550,985 656,494
Number of Options, Exercisable 550,985  
Weighted Average Exercise Price, Outstanding $ 5.57  
Weighted Average Exercise Price, Granted 0  
Weighted Average Exercise Price, Exercised 4.99  
Weighted Average Exercise Price, Forfeited 5.33  
Weighted Average Exercise Price, Outstanding 5.67 $ 5.57
Weighted Average Exercise Price, Exercisable $ 5.67  
Weighted Average Remaining Life In Years, Outstanding 4 years 3 months 18 days 4 years 7 months 6 days
Weighted Average Remaining Life In Years, Exercisable 4 years 3 months 18 days  
Intrinsic Value, Outstanding $ 2,538 $ 252,887
Intrinsic Value, Exercisable $ 2,538