Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Nov. 30, 2018	Nov. 30, 2017
EPS:
Net income	$ 1,925	$ 1,195
Less: accrued preferred stock dividends	(19)	(19)
Net income available for common shareholders	$ 1,906	$ 1,176
Earnings per common share - basic and diluted	$ 0.39	$ 0.24