v3.26.1
The Incentive Stock Plans - Summary of Activity from Incentive Stock Plans (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 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    
Options exercised, Shares Available for Grant (5,000)    
Restricted stock awards granted, Shares Available for Grant (732,335)    
Restricted stock awards forfeited, Shares Available for Grant 26,398    
Additional shares of stock issued, Shares Available for Grant (2,355)    
Shares Available for Grant, Ending Balance 1,089,521   1,387,813
Options Outstanding, Beginning Balance 35,000    
Options exercised, Options Outstanding (5,000)    
Options Outstanding, Ending Balance 30,000   35,000
Exercisable as of June 30, 2026, Options Outstanding 21,665    
Aggregate Intrinsic Value $ 243   $ 87
Exercisable as of June 30, 2026, Aggregate Intrinsic Value $ 162    
Weighted Average Exercise Price, Beginning Balance $ 28.80    
Weighted Average Exercise Price, Ending Balance 30.77   $ 28.80
Exercisable as of June 30, 2026, Weighted Average Exercise Price $ 32.1    
Weighted Average Remaining Contractual Life 6 years 8 months 12 days   6 years 6 months
Exercisable as of June 30, 2026, Weighted Average Remaining Contractual Life 5 years 10 months 24 days