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, 2021	9,184,811
Balance at Aug. 31, 2021	$ 183,696	$ 18,736,268	$ 46,973,092	$ (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 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	5,676,775	0	551,808	6,228,581
Other comprehensive income	0	0	0	(1,858,370)	(78,421)	(1,936,791)
Stock option expense	842	197,798	0	0	0	198,640
Other comprehensive gain	$ 0	0	0	(1,858,370)	(78,421)	(1,936,791)
Stock options exercised (in shares)	42,071
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)	3,371,928	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 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	210,594	1,210,763
Other comprehensive income	0	0	0	(1,524,711)	(29,311)	(1,554,022)
Stock option expense	161	59,279	0	0	0	59,440
Other comprehensive gain	$ 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
Balance (in shares) at Aug. 31, 2022	9,232,483
Balance at Aug. 31, 2022	$ 184,650	19,939,131	50,716,613	(7,245,132)	3,649,034	67,244,296
Stock issued for employee stock purchase plan (in shares)	7,186
Stock issued for employee stock purchase plan	$ 143	75,321	0	0	0	75,464
Stock option expense	0	998,311	0	0	0	998,311
Dividends paid to stockholders	0	0	(1,967,184)	0	0	(1,967,184)
Dividend received by non-controlling interest	0	0	0	0	(555,574)	(555,574)
Net income	0	0	2,913,086	0	417,418	3,330,504
Other comprehensive income	0	0	0	365,685	22,883	388,568
Stock option expense	2,605	413,958	0	0	0	416,563
Other comprehensive gain	$ 0	0	0	365,685	22,883	388,568
Stock options exercised (in shares)	130,254
Balance (in shares) at May. 31, 2023	9,369,923
Balance at May. 31, 2023	$ 187,398	21,426,721	51,662,515	(6,879,447)	3,533,761	69,930,948
Balance (in shares) at Feb. 28, 2023	9,366,357
Balance at Feb. 28, 2023	$ 187,327	21,058,721	50,792,813	(6,774,510)	3,443,643	68,707,994
Stock issued for employee stock purchase plan (in shares)	3,566
Stock issued for employee stock purchase plan	$ 71	36,697	0	0	0	36,768
Stock option expense	0	331,303	0	0	0	331,303
Dividends paid to stockholders	0	0	(655,894)	0	0	(655,894)
Dividend received by non-controlling interest	0	0	0	0	(100,000)	(100,000)
Net income	0	0	1,525,596	0	177,409	1,703,005
Other comprehensive income	0	0	0	(104,937)	12,709	(92,228)
Other comprehensive gain	$ 0	0	0	(104,937)	12,709	(92,228)
Balance (in shares) at May. 31, 2023	9,369,923
Balance at May. 31, 2023	$ 187,398	$ 21,426,721	$ 51,662,515	$ (6,879,447)	$ 3,533,761	$ 69,930,948