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	9,070,036
BALANCE at Aug. 31, 2017	$ 181,400	$ 14,072,809	$ 37,077,483	$ (2,471,064)	$ 2,857,448	$ 51,718,076
Stock issued for employee stock purchase plan (in shares)	3,750
Stock issued for employee stock purchase plan	$ 76	27,875				27,951
Stock option expense		309,743				309,743
Dividends paid to shareholders			(1,361,382)			(1,361,382)
Net income			4,559,225		365,006	4,924,231
Other comprehensive loss				(587,608)	18,458	$ (569,150)
Stock options exercised (in shares)	8,820					8,820
Stock options exercised	$ 176	15,257				$ 15,433
Dividend received by non-controlling interest					(200,000)	(200,000)
BALANCE (in shares) at May. 31, 2018	9,082,606
BALANCE at May. 31, 2018	$ 181,652	14,425,684	40,275,326	(3,058,672)	3,040,912	54,864,902
BALANCE (in shares) at Feb. 28, 2018	9,074,816
BALANCE at Feb. 28, 2018	$ 181,496	14,307,103	38,586,704	(2,070,752)	2,903,410	53,907,961
Stock issued for employee stock purchase plan (in shares)	1,970
Stock issued for employee stock purchase plan	$ 40	15,430				15,470
Stock option expense		103,209				103,209
Dividends paid to shareholders			(454,130)			(454,130)
Net income			2,142,752		161,267	2,304,019
Other comprehensive loss				(987,920)	(23,765)	(1,011,685)
Stock options exercised (in shares)	5,820
Stock options exercised	$ 58					58
BALANCE (in shares) at May. 31, 2018	9,082,606
BALANCE at May. 31, 2018	$ 181,652	14,425,684	40,275,326	(3,058,672)	3,040,912	54,864,902
BALANCE (in shares) at Aug. 31, 2018	9,082,606
BALANCE at Aug. 31, 2018	$ 181,652	14,528,951	41,963,341	(3,597,199)	2,742,309	55,819,054
Stock issued for employee stock purchase plan (in shares)	4,210
Stock issued for employee stock purchase plan	$ 84	52,462				52,546
Stock option expense		1,073,940				1,073,940
Dividends paid to shareholders			(1,635,183)			(1,635,183)
Net income			4,380,776		453,435	4,834,211
Other comprehensive loss				(609,273)	12,805	$ (596,468)
Stock options exercised (in shares)						0
Investment by non-controlling interest					134,034	$ 134,034
Dividend received by non-controlling interest					(200,000)	(200,000)
BALANCE (in shares) at May. 31, 2019	9,086,816
BALANCE at May. 31, 2019	$ 181,736	15,655,353	44,708,934	(4,206,472)	3,142,583	59,482,134
BALANCE (in shares) at Feb. 28, 2019	9,084,354
BALANCE at Feb. 28, 2019	$ 181,688	15,262,556	43,771,843	(3,742,258)	3,013,042	58,486,871
Stock issued for employee stock purchase plan (in shares)	2,462
Stock issued for employee stock purchase plan	$ 48	34,817				34,865
Stock option expense		357,980				357,980
Dividends paid to shareholders			(545,058)			(545,058)
Net income			1,482,149		158,815	1,640,964
Other comprehensive loss				(464,214)	(29,274)	(493,488)
BALANCE (in shares) at May. 31, 2019	9,086,816
BALANCE at May. 31, 2019	$ 181,736	$ 15,655,353	$ 44,708,934	$ (4,206,472)	$ 3,142,583	$ 59,482,134