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		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net loss	$ (732)	$ (619)	$ (1,272)	$ (569)
Net loss attributable to common stockholders	$ (732)	$ (619)	$ (1,272)	$ (569)
Weighted average total shares outstanding – basic	4,036	4,015	3,999	3,898
Weighted average number of common shares outstanding – basic	4,036	4,015	3,999	3,898
Weighted average common shares outstanding – diluted	4,036	4,015	3,999	3,898
Net loss per share - basic	$ (0.18)	$ (0.15)	$ (0.32)	$ (0.15)
Net loss per share - diluted	$ (0.18)	$ (0.15)	$ (0.32)	$ (0.15)