Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
EPS:
Net income	$ 1,278	$ 1,619	$ 2,686	$ 2,850
Less: accrued preferred stock dividends	(19)	(19)	(57)	(57)
Net income available for common shareholders	$ 1,259	$ 1,600	$ 2,629	$ 2,793
Weighted Average Number of Shares Outstanding, Basic and Diluted	4,861,590	4,861,590	4,861,590	4,861,590
Earnings per common share - basic and diluted	$ 0.26	$ 0.33	$ 0.54	$ 0.57