Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
EPS:
Net income	$ 6,786	$ 851
Less: accrued preferred stock dividends	(19)	(19)
Net income attributable to common shareholders	$ 6,767	$ 832
Earnings per common share - basic	$ 1.39	$ 0.17
Earnings per common share - diluted	$ 1.39	$ 0.17