Shareholders' Equity - Additional Information (Details) - USD ($)	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	40,000	40,000	40,000
Convertible Preferred Stock, Shares Issued upon Conversion	36,000	36,000	36,000
Preferred Stock, Dividend Rate, Percentage	8.50%
Preferred Stock, Dividend Rate, Per-Dollar-Amount	$ 25
Dividends, Preferred Stock, Cash	$ 900,000
Debt Instrument, Convertible, Conversion Price	$ 22.50
Final Settlement To Holders Of Preferred Stock During Dissolution	$25.00 per share plus all unpaid dividends
Series A Cumulative Convertible Preferred Stock [Member]
Convertible Preferred Stock, Shares Issued upon Conversion	36,000