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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
Dec. 31, 2021
Dec. 31, 2020
Earnings Per Share of Common Stock    
Net (loss) income $ (366) $ 1,151
Less: net (loss) income attributable to nonvested common stock   54
Net (loss) income attributable to common shareholders $ (366) $ 1,097
Weighted average total shares outstanding - basic 4,200 4,277
Less: weighted average non-vested shares outstanding   203
Weighted average number of common shares outstanding - basic 4,200 4,074
Add: Potential common shares from non-vested stock awards and the assumed exercise of stock options   98
Weighted average common shares outstanding - diluted 4,200 4,172
Net (loss) income per share - basic $ (0.09) $ 0.27
Net (loss) income per share - diluted $ (0.09) $ 0.26