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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		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share of Common Stock
Net loss	$ (423)	$ (210)	$ (119)	$ (1,482)
Net loss attributable to common shareholders	$ (423)	$ (210)	$ (119)	$ (1,482)
Weighted average total shares outstanding - basic	4,179	4,048	4,137	4,015
Weighted average number of common shares outstanding - basic	4,179	4,048	4,137	4,015
Weighted average common shares outstanding - diluted	4,179	4,048	4,137	4,015
Net loss per share - basic	$ (0.10)	$ (0.05)	$ (0.03)	$ (0.37)
Net loss per share - diluted	$ (0.10)	$ (0.05)	$ (0.03)	$ (0.37)

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Net income after adjustments for dividends on preferred stock (declared in the period), cumulative preferred stock (accumulated for the period), and/or net income or loss attributable to non-vested common stock.

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