Consolidated Statements of Changes in Equity (Unaudited) - USD ($)	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balances at May. 31, 2021	$ 5	$ 2,836	$ 53,790,764	$ (43,776,927)	$ 10,016,678	$ 1,236,362	$ 11,253,040
Balance, shares at May. 31, 2021	50,000	28,361,201
Stock options exercised		$ 20	23,980		24,000		24,000
Stock options exercised, shares		200,000
Cash distributions						(52,200)	(52,200)
Preferred dividends				(81,918)	(81,918)		(81,918)
Net income (loss)				3,052,839	3,052,839	69,619	3,122,458
Balance at Aug. 31, 2021	$ 5	$ 2,856	53,814,744	(40,806,006)	13,011,599	1,253,781	14,265,380
Balance, shares at Aug. 31, 2021	50,000	28,561,201
Balances at May. 31, 2021	$ 5	$ 2,836	53,790,764	(43,776,927)	10,016,678	1,236,362	11,253,040
Balance, shares at May. 31, 2021	50,000	28,361,201
Deconsolidation of variable interest entity
Balance at Feb. 28, 2022	$ 5	$ 2,828	53,533,272	(40,732,392)	12,803,713	1,312,762	14,116,475
Balance, shares at Feb. 28, 2022	50,000	28,279,701
Balances at Aug. 31, 2021	$ 5	$ 2,856	53,814,744	(40,806,006)	13,011,599	1,253,781	14,265,380
Balance, shares at Aug. 31, 2021	50,000	28,561,201
Preferred dividends				(81,027)	(81,027)		(81,027)
Net income (loss)				(297,817)	(297,817)	68,332	(229,485)
Balance at Nov. 30, 2021	$ 5	$ 2,856	53,814,744	(41,184,850)	12,632,755	1,322,113	13,954,868
Balance, shares at Nov. 30, 2021	50,000	28,561,201
Cash distributions						(80,000)	(80,000)
Preferred dividends				(80,137)	(80,137)		(80,137)
Net income (loss)				532,595	532,595	70,649	603,244
Common stock purchase		$ (28)	(281,472)		(281,500)		(281,500)
Common stock purchase, shares		(281,500)
Balance at Feb. 28, 2022	$ 5	$ 2,828	53,533,272	(40,732,392)	12,803,713	1,312,762	14,116,475
Balance, shares at Feb. 28, 2022	50,000	28,279,701
Balances at May. 31, 2022	$ 5	$ 2,828	53,533,272	(39,838,449)	13,697,656	1,383,825	15,081,481
Balance, shares at May. 31, 2022	50,000	28,279,701
Preferred dividends				(109,418)	(109,418)		(109,418)
Net income (loss)				1,324,142	1,324,142	49,599	1,373,741
Capital contribution						1,669,000	1,669,000
Deconsolidation of variable interest entity						(3,102,424)	(3,102,424)
Balance at Aug. 31, 2022	$ 5	$ 2,828	53,533,272	(38,623,725)	14,912,380		14,912,380
Balance, shares at Aug. 31, 2022	50,000	28,279,701
Balances at May. 31, 2022	$ 5	$ 2,828	53,533,272	(39,838,449)	13,697,656	1,383,825	15,081,481
Balance, shares at May. 31, 2022	50,000	28,279,701
Deconsolidation of variable interest entity							(3,102,424)
Balance at Feb. 28, 2023	$ 5	$ 2,828	53,533,272	(35,367,325)	18,168,780		18,168,780
Balance, shares at Feb. 28, 2023	50,000	28,279,701
Balances at Aug. 31, 2022	$ 5	$ 2,828	53,533,272	(38,623,725)	14,912,380		14,912,380
Balance, shares at Aug. 31, 2022	50,000	28,279,701
Preferred dividends				(119,349)	(119,349)		(119,349)
Net income (loss)				(187,247)	(187,247)		(187,247)
Balance at Nov. 30, 2022	$ 5	$ 2,828	53,533,272	(38,930,321)	14,605,784		14,605,784
Balance, shares at Nov. 30, 2022	50,000	28,279,701
Preferred dividends				(132,500)	(132,500)		(132,500)
Net income (loss)				3,695,496	3,695,496		3,695,496
Balance at Feb. 28, 2023	$ 5	$ 2,828	$ 53,533,272	$ (35,367,325)	$ 18,168,780		$ 18,168,780
Balance, shares at Feb. 28, 2023	50,000	28,279,701