Consolidated Statements of Equity (Unaudited) - 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 issued for employee stock purchase plan (in shares)	890
Stock issued for employee stock purchase plan	$ 18	12,463				12,481
Stock option expense		206,534				206,534
Dividends paid to shareholders			(907,252)			(907,252)
Dividend received by non-controlling interest					(200,000)	(200,000)
NET INCOME			2,416,473		203,739	2,620,212
Other comprehensive income (loss)				400,312	42,223	$ (102,980)
Stock options exercised (in shares)	1,500					1,500
Stock options exercised	$ 30	15,345				$ 15,375
Balance (in shares) at Feb. 28, 2018	4,537,408
Balance at Feb. 28, 2018	$ 90,748	14,397,851	38,586,704	(2,070,752)	2,903,410	53,907,961
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
Stock issued for employee stock purchase plan (in shares)
Stock issued for employee stock purchase plan
Stock option expense		103,267				103,267
Dividends paid to shareholders			(452,510)			(452,514)
Dividend received by non-controlling interest
NET INCOME			1,332,847		88,776	1,421,623
Other comprehensive income (loss)				447,491	20,271	467,762
Stock options exercised (in shares)
Stock options exercised
Balance (in shares) at Feb. 28, 2018	4,537,408
Balance at Feb. 28, 2018	$ 90,748	14,397,851	38,586,704	(2,070,752)	2,903,410	53,907,961
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 issued for employee stock purchase plan (in shares)	874
Stock issued for employee stock purchase plan	$ 18	17,663				17,681
Stock option expense		715,960				715,960
Investment by non-controlling interest					134,034	134,034
Dividends paid to shareholders			(1,090,125)			(1,090,125)
Dividend received by non-controlling interest					(200,000)	(200,000)
NET INCOME			2,898,627		294,620	3,193,247
Other comprehensive income (loss)				(145,059)	42,079	$ (102,980)
Stock options exercised (in shares)						0
Balance (in shares) at Feb. 28, 2019	4,542,177
Balance at Feb. 28, 2019	$ 90,844	15,353,400	43,771,843	(3,742,258)	3,013,042	$ 58,486,871
Balance (in shares) at Nov. 30, 2018	4,532,177
Balance at Nov. 30, 2018	$ 90,844	14,995,420	42,915,335	(3,918,085)	3,043,543	57,127,057
Stock issued for employee stock purchase plan (in shares)
Stock issued for employee stock purchase plan
Stock option expense		357,980				357,980
Investment by non-controlling interest
Dividends paid to shareholders			(545,060)			(545,064)
Dividend received by non-controlling interest					(200,000)	(200,000)
NET INCOME			1,401,568		150,544	1,552,056
Other comprehensive income (loss)				175,827	19,011	194,838
Balance (in shares) at Feb. 28, 2019	4,542,177
Balance at Feb. 28, 2019	$ 90,844	$ 15,353,400	$ 43,771,843	$ (3,742,258)	$ 3,013,042	$ 58,486,871