Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Earnings [Member]
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	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
Preferred dividends	(76)	$ 0	$ 0	0	0	(76)
Foreign translation gain	181	0	0	0	181	0
Net income	6,949	0	0	0	0	6,949
Balance at Aug. 31, 2018	$ 41,886	$ 1	$ 49	$ 12,378	$ 928	$ 28,530
Balance (in Shares) at Aug. 31, 2018		36,000	4,861,590