Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
EPS:
Net income	$ 1,174	$ 2,297	$ 2,688	$ 3,470
Less: accrued preferred stock dividends	(19)	(19)	(57)	(57)
Net income available for common shareholders	$ 1,155	$ 2,278	$ 2,631	$ 3,413
Earnings per common share - basic and diluted (in dollars per share)	$ 0.24	$ 0.47	$ 0.54	$ 0.7