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The Incentive Stock Plans - Summary of Activity from Incentive Stock Plans (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Sep. 30, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Options granted, Options Outstanding 0 5,000  
Stock Options [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares Available for Grant, Beginning Balance 1,984,588    
Options cancelled/forfeited/expired, Shares Available for Grant 21,000    
Restricted stock awards granted, Shares Available for Grant (723,111)    
Restricted stock awards forfeited, Shares Available for Grant 35,105    
Additional shares of stock issued, Shares Available for Grant (3,456)    
Shares Available for Grant, Ending Balance 1,314,126   1,984,588
Options Outstanding, Beginning Balance 54,750    
Options cancelled/forfeited/expired, Options Outstanding (21,000)    
Options exercised, Options Outstanding (5,000)    
Options Outstanding, Ending Balance 28,750   54,750
Exercisable as of March 31, 2024, Options Outstanding 27,083    
Aggregate Intrinsic Value $ 297   $ 746
Exercisable as of March 31, 2024, Aggregate Intrinsic Value $ 294    
Weighted Average Exercise Price, Beginning Balance $ 20.96    
Options cancelled/forfeited/expired, Weighted Average Exercise Price 15.8    
Options exercised, Weighted Average Exercise Price 16.11    
Weighted Average Exercise Price, Ending Balance 25.57   $ 20.96
Exercisable as of March 31, 2024, Weighted Average Exercise Price $ 25.23    
Weighted Average Remaining Contractual Life 4 years 1 month 6 days   2 years 6 months
Exercisable as of March 31, 2024, Weighted Average Remaining Contractual Life 3 days 21 hours