Earnings per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2014	May 31, 2013
EPS:
Net income	$ 2,297	$ 1,284	$ 3,470	$ 2,308
Less: accrued preferred stock dividends	(19)	(19)	(57)	(57)
Net income available for common shareholders	$ 2,278	$ 1,265	$ 3,413	$ 2,251
Earnings per common share - basic and diluted (in dollars per share)	$ 0.47	$ 0.26	$ 0.70	$ 0.46