Consolidated Statements of Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Aug. 31, 2017	4,535,018
Balance at Aug. 31, 2017	$ 90,700	$ 14,163,509	$ 37,077,483	$ (2,471,064)	$ 2,857,448	$ 51,718,076
Stock options exercised (in shares)	1,500					1,500
Stock options exercised	$ 30	15,345				$ 15,375
Stock issued for employee stock purchase plan (in shares)	890
Stock issued for employee stock purchase plan	$ 18	12,463				12,481
Stock option expense		103,267				103,267
Dividends paid to shareholders			(454,738)			(454,738)
Dividend received by non-controlling interest					(200,000)	(200,000)
Comprehensive income (loss)			1,083,622	(47,179)	136,915	1,173,358
Balance (in shares) at Nov. 30, 2017	4,537,408
Balance at Nov. 30, 2017	$ 90,748	14,294,584	37,706,367	(2,518,243)	2,794,363	52,367,819
Balance (in shares) at Aug. 31, 2018	4,541,303
Balance at Aug. 31, 2018	$ 90,826	14,619,777	41,963,341	(3,597,199)	2,742,309	$ 55,819,054
Stock options exercised (in shares)						0
Stock issued for employee stock purchase plan (in shares)	874
Stock issued for employee stock purchase plan	$ 18	17,663				$ 17,681
Stock option expense		357,980				357,980
Dividends paid to shareholders			(545,061)			(545,061)
Comprehensive income (loss)			1,497,055	(320,886)	167,200	1,343,369
Investment by non-controlling interest					134,034	134,034
Balance (in shares) at Nov. 30, 2018	4,542,177
Balance at Nov. 30, 2018	$ 90,844	$ 14,995,420	$ 42,915,335	$ (3,918,085)	$ 3,043,543	$ 57,127,057