Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
EPS:
Net income	$ 8,387	$ 7,793
Less: accrued preferred stock dividends	(76)	(76)
Net income attributable to common shareholders for basic and diluted EPS computation	$ 8,311	$ 7,717
Weighted average common shares outstanding for basic EPS computation	4,861,590	4,861,590
Weighted average common shares outstanding for diluted EPS computation	4,861,590	4,861,590
Earnings per common share - basic	$ 1.71	$ 1.59
Earnings per common share - diluted	$ 1.71	$ 1.59