Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
EPS - basic and diluted:
Net income	$ 7,793	$ 9,432
Less: cumulative preferred stock dividend	(76)	(76)
Net income attributable to common shareholders for basic and diluted EPS computation	$ 7,717	$ 9,356
Weighted average common shares outstanding for basic and diluted EPS computation	4,861,590	4,861,590
Earnings per common share - basic and diluted	$ 1.59	$ 1.92