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, 2020	9,099,990
BALANCE at Aug. 31, 2020	$ 182,000	$ 17,415,043	$ 42,472,810	$ (3,410,438)	$ 3,045,026	$ 59,704,441
Stock issued for employee stock purchase plan (in shares)	9,871
Stock issued for employee stock purchase plan	$ 197	74,137	0	0	0	74,334
Stock option expense	0	503,338	0	0	0	503,338
Dividends paid to stockholders	0	0	(1,183,943)	0	0	(1,183,943)
Dividend received by non-controlling interest	0	0	0	0	(200,000)	(200,000)
Net income	0	0	4,628,890	0	589,781	5,218,671
Other comprehensive gain	0	0	0	692,503	64,770	757,273
Other comprehensive income	$ 0	0	0	692,503	64,770	757,273
BALANCE (in shares) at May. 31, 2021	9,109,861
BALANCE at May. 31, 2021	$ 182,197	17,992,518	45,917,757	(2,717,935)	3,499,577	64,874,114
BALANCE (in shares) at Feb. 28, 2021	9,104,636
BALANCE at Feb. 28, 2021	$ 182,093	17,793,646	44,455,982	(2,969,563)	3,232,806	62,694,964
Stock issued for employee stock purchase plan (in shares)	5,225
Stock issued for employee stock purchase plan	$ 104	38,038	0	0	0	38,142
Stock option expense	0	160,834	0	0	0	160,834
Dividends paid to stockholders	0	0	(592,141)	0	0	(592,141)
Net income	0	0	2,053,916	0	256,132	2,310,048
Other comprehensive gain	0	0	0	251,628	10,639	262,267
Other comprehensive income	$ 0	0	0	251,628	10,639	262,267
BALANCE (in shares) at May. 31, 2021	9,109,861
BALANCE at May. 31, 2021	$ 182,197	17,992,518	45,917,757	(2,717,935)	3,499,577	64,874,114
BALANCE (in shares) at Aug. 31, 2021	9,184,811
BALANCE at Aug. 31, 2021	$ 183,696	18,736,268	46,973,094	(3,525,030)	3,382,553	65,750,581
Stock issued for employee stock purchase plan (in shares)	5,601
Stock issued for employee stock purchase plan	$ 112	73,533	0	0	0	73,645
Stock options exercised (in shares)	42,071
Stock options exercised	$ 842	197,798	0	0	0	198,640
Stock option expense	0	698,649	0	0	0	698,649
Dividends paid to stockholders	0	0	(1,934,906)	0	0	(1,934,906)
Dividend received by non-controlling interest	0	0	0	0	(402,729)	(402,729)
Net income	0	0	5,676,773	0	551,808	6,228,581
Other comprehensive gain	0	0	0	(1,858,370)	(78,421)	(1,936,791)
Other comprehensive income	$ 0	0	0	(1,858,370)	(78,421)	(1,936,791)
BALANCE (in shares) at May. 31, 2022	9,232,483
BALANCE at May. 31, 2022	$ 184,650	19,706,248	50,714,961	(5,383,400)	3,453,211	68,675,670
BALANCE (in shares) at Feb. 28, 2022	9,221,517
BALANCE at Feb. 28, 2022	$ 184,430	19,379,032	50,361,068	(3,858,689)	3,371,926	69,437,767
Stock issued for employee stock purchase plan (in shares)	2,966
Stock issued for employee stock purchase plan	$ 59	35,054	0	0	0	35,113
Stock options exercised (in shares)	8,000
Stock options exercised	$ 161	59,279	0	0	0	59,440
Stock option expense	0	232,883	0	0	0	232,883
Dividends paid to stockholders	0	0	(646,274)	0	0	(646,274)
Dividend received by non-controlling interest	0	0	0	0	(100,000)	(100,000)
Net income	0	0	1,000,167	0	210,596	1,210,763
Other comprehensive gain	0	0	0	(1,524,711)	(29,311)	(1,554,022)
Other comprehensive income	$ 0	0	0	(1,524,711)	(29,311)	(1,554,022)
BALANCE (in shares) at May. 31, 2022	9,232,483
BALANCE at May. 31, 2022	$ 184,650	$ 19,706,248	$ 50,714,961	$ (5,383,400)	$ 3,453,211	$ 68,675,670