Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]
Balance at Aug. 31, 2015	$ 26,951	$ 1	$ 49	$ 12,378	$ 860	$ 13,663
Balance (in Shares) at Aug. 31, 2015		36,000	4,861,590
Preferred dividends	(76)	$ 0	$ 0	0	0	(76)
Foreign translation gain (loss)	(130)	0	0	0	(130)	0
Net income	4,095	0	0	0	0	4,095
Balance at Aug. 31, 2016	30,840	$ 1	$ 49	12,378	730	17,682
Balance (in Shares) at Aug. 31, 2016		36,000	4,861,590
Preferred dividends	(76)	$ 0	$ 0	0	0	(76)
Foreign translation gain (loss)	17	0	0	0	17	0
Net income	4,051	0	0	0	0	4,051
Balance at Aug. 31, 2017	$ 34,832	$ 1	$ 49	$ 12,378	$ 747	$ 21,657
Balance (in Shares) at Aug. 31, 2017		36,000	4,861,590