Net Income per Share - Basic and Diluted Earnings Per Share (Detail) - USD ($)	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Earnings Per Share [Abstract]
Net Income	$ 3,442,000	$ 3,817,000
Common Shares:
Weighted average common shares outstanding - Basic	14,658,000	14,658,000
Weighted average common shares outstanding - Diluted	14,658,000	14,658,000
Net income per common share – basic	$ 0.23	$ 0.26
Net income per common share – diluted	$ 0.23	$ 0.26