Equities Dividends Per Share (Details) - $ / shares	9 Months Ended
	May 31, 2019	May 31, 2018
8% Cumulative Redeemable [Member]
8% Cumulative Redeemable [Line Items]
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears	$ 1.50	$ 1.50
Class B, Series 1 Preferred Stock [Member]
8% Cumulative Redeemable [Line Items]
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears	1.48	1.48
Class B, Series 2 Preferred Stock [Member]
8% Cumulative Redeemable [Line Items]
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears	1.33	1.33
Class B, Series 3 Preferred Stock [Member]
8% Cumulative Redeemable [Line Items]
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears	1.27	1.27
Class B, Series 4 Preferred Stock [Member]
8% Cumulative Redeemable [Line Items]
Preferred Stock, Per Share Amounts of Preferred Dividends in Arrears	$ 1.41	$ 1.41