Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation - Additional Information (Detail)

v3.20.4
Equity-Based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 11, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Stock Compensation Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Equity based compensation expense   $ 312 $ 308 $ 783 $ 709
Income tax benefit to equity based compensation   $ 72 $ 67 $ 183 $ 156
Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option awards granted   0 0 0 0
Stock options maximum term       10 years  
2020 Equity Incentive Plan [Member] | Stock Compensation Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized   422,000   422,000  
Amended and Restated 2000 Incentive Plan [Member] | Stock Compensation Prior Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Remaining available shares under equity based compensation plan   112,000   112,000  
Amended and Restated 2000 Incentive Plan [Member] | Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option awards granted 0        
Amended and Restated 2000 Incentive Plan [Member] | Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock awarded   0 0 113,000 83,000
Amended and Restated 2000 Incentive Plan [Member] | Restricted Stock [Member] | Performance Vested Restricted Stock [Member] | Officer [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock awarded       54,000 40,000
Share-based compensation vesting percentage       100.00%  
Vesting period       3 years  
Amended and Restated 2000 Incentive Plan [Member] | Restricted Stock [Member] | Time Vested Restricted Stock [Member] | Officers and Key Employees [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock awarded       38,000 28,000
Share-based compensation vesting percentage       33.33%  
Vesting period       3 years  
Amended and Restated 2000 Incentive Plan [Member] | Restricted Stock [Member] | Time Vested Restricted Stock [Member] | Director [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock awarded       21,000 15,000
Share-based compensation vesting percentage       100.00%  
Vesting period       1 year  
Employee Stock Purchase Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Equity based compensation expense   $ 15 $ 11 $ 38 $ 22
Income tax benefit to equity based compensation   $ 4 $ 3 $ 9 $ 5
Maximum discount on purchase price of common stock percentage on fair market value       15.00%  
Common stock may be purchased   200   200