v3.26.1
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, 2026
Mar. 31, 2025
Sep. 30, 2025
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Options granted, Options Outstanding 0 0  
Stock Options [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares Available for Grant, Beginning Balance 1,387,813    
Shares authorized, Shares Available for Grant 415,000    
Restricted stock awards granted, Shares Available for Grant (727,522)    
Restricted stock awards forfeited, Shares Available for Grant 16,405    
Additional shares of stock issued, Shares Available for Grant (1,615)    
Shares Available for Grant, Ending Balance 1,090,081   1,387,813
Options Outstanding, Beginning Balance 35,000    
Options Outstanding, Ending Balance 35,000   35,000
Exercisable as of March 31, 2026, Options Outstanding 26,665    
Aggregate Intrinsic Value $ 97   $ 87
Exercisable as of March 31, 2026, Aggregate Intrinsic Value $ 89    
Weighted Average Exercise Price, Beginning Balance $ 28.80    
Weighted Average Exercise Price, Ending Balance 28.8   $ 28.80
Exercisable as of March 31, 2026, Weighted Average Exercise Price $ 29.26    
Weighted Average Remaining Contractual Life 6 years   6 years 6 months
Exercisable as of March 31, 2026, Weighted Average Remaining Contractual Life 5 years