Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	May 31, 2024	Feb. 29, 2024	Nov. 30, 2023	May 31, 2023	Feb. 28, 2023	Nov. 30, 2022	May 31, 2024	May 31, 2023
EPS:
Net income	$ 1,184	$ 5,498	$ 1,779	$ 5,319	$ 5,100	$ 4,711	$ 8,461	$ 15,130
Less: accrued preferred stock dividends	(19)			(19)			(57)	(57)
Net income available for common shareholders	$ 1,165			$ 5,300			$ 8,404	$ 15,073
Earnings per common share - basic	$ 0.24			$ 1.09			$ 1.73	$ 3.10
Earnings per common share - diluted	$ 0.24			$ 1.09			$ 1.73	$ 3.09