Earnings Per Share of Common Stock - Basic and diluted EPS computations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share of Common Stock
Net income	$ 2,514	$ 684	$ 3,796	$ 474
Less: net income attributable to nonvested common stock	(159)	(38)	(232)	(24)
Net income attributable to common shareholders	$ 2,355	$ 646	$ 3,564	$ 450
Weighted average total shares outstanding - basic	4,710	4,535	4,651	4,481
Less: weighted average non-vested shares outstanding	(297)	(255)	(285)	(230)
Weighted average number of common shares outstanding - basic	4,413	4,280	4,366	4,251
Add: potential common shares from non-vested stock awards	103	3	69	14
Weighted average common shares outstanding - diluted	4,516	4,283	4,435	4,265
Net income per common share - basic	$ 0.53	$ 0.15	$ 0.82	$ 0.11
Net income per common share - diluted	$ 0.52	$ 0.15	$ 0.80	$ 0.11