Shareholders' Equity (Details Textual) - USD ($)	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Preferred Stock, Dividend Rate, Percentage	8.50%
Dividends, Preferred Stock, Cash	$ 900,000
Debt Instrument, Convertible, Conversion Price	$ 22.50
Preferred Stock, Dividend Rate, Per-Dollar-Amount	$ 25
Final Settlement To Holders Of Preferred Stock During Dissolution	$25.00 per share plus all unpaid dividends
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	40,000	40,000
Convertible Preferred Stock, Shares Issued upon Conversion	36,000	36,000
Series A Cumulative Convertible Preferred Stock [Member]
Convertible Preferred Stock, Shares Issued upon Conversion	36,000