Annual report pursuant to Section 13 and 15(d)

Equity Compensation Plans - Additional Information (Detail)

v3.22.1
Equity Compensation Plans - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Aug. 11, 2020
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of stock options   33,000 37,000 37,000 39,000
Cash proceeds from the exercise of stock options   $ 0 $ 0 $ 24  
Total intrinsic value of the stock options exercised   $ 0 0 10  
Options, stock awards and performance awards available for future grants   405,000      
Stock Compensation Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock based compensation expense   $ 780 817 945  
Income tax benefit to stock based compensation   $ 173 $ 193 $ 208  
Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option awards granted   0 0 0  
Stock options maximum term   10 years      
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock awarded   164,000 113,000 83,000  
Unrecognized stock-based compensation expense   $ 1,923      
Weighted average period for recognize expense   1 year 9 months 14 days      
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      
2020 Equity Incentive Plan [Member] | Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of stock options 33,000        
2020 Equity Incentive Plan [Member] | Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of stock options 47,000        
Restricted stock awarded       83,000  
2020 Equity 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    
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]          
Restricted stock awarded   164,000 113,000    
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   88,000 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   54,000   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   22,000 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]          
Stock based compensation expense   $ 29 $ 47 $ 30  
Income tax benefit to stock based compensation   $ 7 $ 11 $ 7  
Maximum discount on purchase price of common stock percentage on fair market value   15.00%      
Issue of treasury stock to the ESPP for the offering periods   18,000 21,000 9,000  
Common stock may be purchased   200,000