Earnings Per Share of Common Stock - Basic and diluted earnings per share computations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share of Common Stock
Net income (loss)	$ 684	$ (423)	$ 474	$ (119)
Less: net income attributable to nonvested common stock	38	0	24	0
Net income (loss) attributable to common shareholders	$ 646	$ (423)	$ 450	$ (119)
Weighted average total shares outstanding - basic	4,535	4,179	4,481	4,137
Less: weighted average non-vested shares outstanding	255	0	230	0
Weighted average number of common shares outstanding - basic	4,280	4,179	4,251	4,137
Add: potential common shares from non-vested stock awards and the assumed exercise of stock options	3	0	14	0
Weighted average common shares outstanding - diluted	4,283	4,179	4,265	4,137
Net income (loss) per common share - basic	$ 0.15	$ (0.10)	$ 0.11	$ (0.03)
Net income (loss) per common share - diluted	$ 0.15	$ (0.10)	$ 0.11	$ (0.03)