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 (in shares) at May. 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
Capital contribution non-controlling interest	0	0	0	0	0	1,669,000	1,669,000
Deconsolidation of variable interest entity	0	0	0	0	0	(3,102,424)	(3,102,424)
Preferred dividends	0	0	0	(109,418)	(109,418)	0	(109,418)
Net income	0	0	0	1,324,142	1,324,142	49,599	1,373,741
Preferred dividends ($2.39 per share)	$ (0)	$ (0)	(0)	109,418	109,418	(0)	109,418
Balances (in shares) at Aug. 31, 2022	50,000	28,279,701
Balances at Aug. 31, 2022	$ 5	$ 2,828	53,533,272	(38,623,725)	14,912,380	0	14,912,380
Balances (in shares) at May. 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
Net income							1,186,494
Balances (in shares) at Nov. 30, 2022	50,000	28,279,701
Balances at Nov. 30, 2022	$ 5	$ 2,828	53,533,272	(38,930,321)	14,605,784	0	14,605,784
Balances (in shares) at Aug. 31, 2022	50,000	28,279,701
Balances at Aug. 31, 2022	$ 5	$ 2,828	53,533,272	(38,623,725)	14,912,380	0	14,912,380
Preferred dividends	0	0	0	(119,349)	(119,349)	0	(119,349)
Net income	0	0	0	(187,247)	(187,247)	0	(187,247)
Preferred dividends ($2.39 per share)	$ 0	$ 0	0	119,349	119,349	0	119,349
Balances (in shares) at Nov. 30, 2022	50,000	28,279,701
Balances at Nov. 30, 2022	$ 5	$ 2,828	53,533,272	(38,930,321)	14,605,784	0	14,605,784
Balances (in shares) at May. 31, 2023	50,000	28,279,701
Balances at May. 31, 2023	$ 5	$ 2,828	53,533,272	(33,995,621)	19,540,484	0	19,540,484
Preferred dividends	0	0	0	(146,199)	(146,199)	0	(146,199)
Net income	0	0	0	1,744,219	1,744,219	0	1,744,219
Preferred dividends ($2.39 per share)	$ (0)	$ (0)	(0)	146,199	146,199	(0)	146,199
Balances (in shares) at Aug. 31, 2023	50,000	28,279,701
Balances at Aug. 31, 2023	$ 5	$ 2,828	53,533,272	(32,397,601)	21,138,504	0	21,138,504
Balances (in shares) at May. 31, 2023	50,000	28,279,701
Balances at May. 31, 2023	$ 5	$ 2,828	53,533,272	(33,995,621)	19,540,484	0	19,540,484
Net income							2,709,045
Balances (in shares) at Nov. 30, 2023	50,000	28,279,701
Balances at Nov. 30, 2023	$ 5	$ 2,828	53,533,272	(31,579,247)	21,956,858	0	21,956,858
Balances (in shares) at Aug. 31, 2023	50,000	28,279,701
Balances at Aug. 31, 2023	$ 5	$ 2,828	53,533,272	(32,397,601)	21,138,504	0	21,138,504
Preferred dividends	0	0	0	(146,472)	(146,472)	0	(146,472)
Net income	0	0	0	964,826	964,826	0	964,826
Preferred dividends ($2.39 per share)	$ 0	$ 0	0	146,472	146,472	0	146,472
Balances (in shares) at Nov. 30, 2023	50,000	28,279,701
Balances at Nov. 30, 2023	$ 5	$ 2,828	$ 53,533,272	$ (31,579,247)	$ 21,956,858	$ 0	$ 21,956,858