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The Incentive Stock Plans - Summary of Activity from Incentive Stock Plans (Detail) - Stock Options [Member]
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Shares Available for Grant, Beginning Balance 918,061  
Shares authorized, Shares Available for Grant 1,000,000  
Options cancelled/forfeited/expired, Shares Available for Grant 20,000  
Restricted stock awards granted, Shares Available for Grant (385,073)  
Restricted stock awards forfeited, Shares Available for Grant 3,650  
Additional shares of stock issued, Shares Available for Grant (1,443)  
Shares Available for Grant, Ending Balance 1,555,195 918,061
Options Outstanding, Beginning Balance 115,250  
Options cancelled/forfeited/expired, Options Outstanding (20,000)  
Options exercised, Options Outstanding (22,500)  
Options Outstanding, Ending Balance 72,750 115,250
Exercisable as of June 30, 2021, Options Outstanding 68,416  
Aggregate Intrinsic Value | $ $ 1,925 $ 4,085
Exercisable as of June 30 2021, Aggregate Intrinsic Value | $ $ 1,891  
Weighted Average Exercise Price, Beginning Balance | $ / shares $ 13.08  
Options cancelled/forfeited/expired, Weighted Average Exercise Price | $ / shares 7.39  
Options exercised, Weighted Average Exercise Price | $ / shares 7.95  
Weighted Average Exercise Price, Ending Balance | $ / shares 16.22 $ 13.08
Exercisable as of June 30 2021, Weighted Average Exercise Price | $ / shares $ 14.78  
Weighted Average Remaining Contractual Life 2 years 6 months 1 year 10 months 24 days
Exercisable as of June 30, 2021, Weighted Average Remaining Contractual Life 2 years 2 months 12 days