Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Basic and diluted earnings per share:
Net income	$ 4,051	$ 4,095
Less: cumulative preferred stock dividends	(76)	(76)
Net income available to common shareholders for basic and diluted EPS computation	$ 3,975	$ 4,019
Weighted average common shares outstanding for basic and diluted EPS computation	4,861,590	4,861,590
Earnings per common share - basic and diluted	$ 0.82	$ 0.83