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The Incentive Stock Plans - Additional Information (Detail) - shares	1 Months Ended		12 Months Ended
	Feb. 28, 2025	Feb. 28, 2023	Sep. 30, 2025	Sep. 30, 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options granted			10,000	5,000
Incentive Stock Plan 2021 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Increase in total number of available shares	495,000	1,300,000
Incentive Stock Plan 2021 [Member] | Subject To Award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares authorized			2,795,000
Incentive Stock Plan 2011 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Common stock shares available			545,729

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