Annual report pursuant to Section 13 and 15(d)

Stock Compensation Plans - Additional Information (Detail)

v3.23.1
Stock Compensation Plans - Additional Information (Detail) - USD ($)
6 Months Ended 12 Months Ended
Aug. 11, 2020
Sep. 30, 2022
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock based compensation expense     $ 785,000 $ 780,000 $ 817,000
Income tax benefit to stock based compensation     $ 173,000 $ 173,000 $ 193,000
Maximum discount on purchase price of common stock percentage on fair market value   15.00%      
Common stock may be purchased     4    
Performance Vested Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option awards granted       88,000 54,000
Time Vested Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option awards granted       76,000 59,000
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized stock-based compensation expense     $ 2,345,000    
Weighted average period for recognize expense     1 year 9 months 3 days    
2020 Equity Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Awards available for future grants     256,000    
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    
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]          
Number of unvested restricted stock 13,000        
Amended and Restated 2000 Incentive Plan [Member] | Maximum [Member] | Stock Compensation Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized     422,000    
Employee Stock Purchase Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock based compensation expense     $ 21,000 $ 29,000 $ 47,000
Shares issued from common stock     17,000    
Income tax benefit to stock based compensation     $ 5,000 $ 7,000 $ 11,000
Issue of treasury stock to the ESPP for the offering periods     29,000 18,000 21,000