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, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net (loss) income	$ (540)	$ 50
Less: net income attributable to nonvested common stock		2
Net (loss) income attributable to common stockholders	$ (540)	$ 48
Weighted average total shares outstanding – basic	3,963	4,018
Less: weighted average non-vested shares outstanding		150
Weighted average number of common shares outstanding – basic	3,963	3,868
Potential common shares from non-vested stock awards and the assumed exercise of stock options		98
Weighted average common shares outstanding – diluted	3,963	3,966
Net (loss) income per share – basic	$ (0.14)	$ 0.01
Net (loss) income per share – diluted	$ (0.14)	$ 0.01