Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015
EPS:
Net income	$ 1,619	$ 1,174	$ 2,850	$ 2,688
Less: accrued preferred stock dividends	(19)	(19)	(57)	(57)
Net income available for common shareholders (in shares)	$ 1,600	$ 1,155	$ 2,793	$ 2,631
Earnings per common share - basic and diluted (in dollars per share)	$ 0.33	$ 0.24	$ 0.59	$ 0.54