Consolidated Statements of Changes in Equity (Unaudited) - USD ($)	Preferred Stock [Member]	Common Stock Outstanding [Member]	Treasury Stock, Common [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balances (in shares) at May. 31, 2023	50,000	28,279,701
Balances at May. 31, 2023	$ 5	$ 2,828	$ 0	$ 53,533,272	$ (33,995,621)	$ 19,540,484
Balances (in shares) at May. 31, 2023			0
Preferred dividends	0	0	$ 0	0
Net income (loss)	0	0	0	0	1,744,219	1,744,219
Preferred dividends	$ (0)	$ (0)	(0)	(0)
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
Balances (in shares) at May. 31, 2023	50,000	28,279,701
Balances at May. 31, 2023	$ 5	$ 2,828	$ 0	53,533,272	(33,995,621)	19,540,484
Balances (in shares) at May. 31, 2023			0
Net income (loss)						3,006,974
Balances (in shares) at Feb. 29, 2024	50,000	28,279,701
Balances at Feb. 29, 2024	$ 5	$ 2,828		53,533,272	(31,427,791)	22,108,314
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
Preferred dividends	0	0	$ 0	0	(146,472)	(146,472)
Net income (loss)	0	0	0	0	964,826	964,826
Preferred dividends	$ (0)	$ (0)	(0)	(0)	146,472	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
Preferred dividends	0	0	0	0	(146,473)	(146,473)
Net income (loss)	0	0	0	0	297,929	297,929
Preferred dividends	$ 0	$ 0	0	0	146,473	146,473
Balances (in shares) at Feb. 29, 2024	50,000	28,279,701
Balances at Feb. 29, 2024	$ 5	$ 2,828		53,533,272	(31,427,791)	22,108,314
Balances (in shares) at May. 31, 2024	50,000	28,279,701
Balances at May. 31, 2024	$ 5	$ 2,828		53,533,272	(29,555,356)	23,980,749
Preferred dividends	0	0	0	0	(148,082)	(148,082)
Net income (loss)	0	0	0	0	335,454	335,454
Preferred dividends	$ (0)	$ (0)	(0)	(0)	148,082	148,082
Balances (in shares) at Aug. 31, 2024	50,000	28,279,701
Balances at Aug. 31, 2024	$ 5	$ 2,828		53,533,272	(29,367,984)	24,168,121
Balances (in shares) at May. 31, 2024	50,000	28,279,701
Balances at May. 31, 2024	$ 5	$ 2,828		53,533,272	(29,555,356)	23,980,749
Net income (loss)						1,096,405
Balances (in shares) at Feb. 28, 2025	29,000	28,279,701
Balances at Feb. 28, 2025	$ 3	$ 2,828	$ (546,035)	51,433,274	(28,863,414)	$ 22,026,656
Balances (in shares) at Feb. 28, 2025			519,992			519,992
Balances (in shares) at Aug. 31, 2024	50,000	28,279,701
Balances at Aug. 31, 2024	$ 5	$ 2,828		53,533,272	(29,367,984)	$ 24,168,121
Preferred dividends	0	0	$ 0	0	(140,583)	(140,583)
Net income (loss)	0	0	0	0	(204,714)	(204,714)
Preferred dividends	$ (0)	$ (0)	(0)	(0)	140,583	140,583
Balances (in shares) at Nov. 30, 2024	50,000	28,279,701
Balances at Nov. 30, 2024	$ 5	$ 2,828		53,533,272	(29,713,281)	23,822,824
Preferred dividends	0	0	0	0	(115,798)	(115,798)
Net income (loss)	0	0	0	0	965,665	965,665
Preferred dividends	$ (0)	$ (0)	(0)	(0)	115,798	115,798
Balances (in shares) at Feb. 28, 2025	29,000	28,279,701
Balances at Feb. 28, 2025	$ 3	$ 2,828	$ (546,035)	51,433,274	(28,863,414)	22,026,656
Retirement of preferred stock (in shares)	(21,000)
Retirement of preferred stock	$ (2)			(2,099,998)	0	(2,100,000)
Repurchase of common stock (in shares)		0	519,992
Repurchase of common stock			$ (546,035)	$ 0	$ 0	$ (546,035)
Balances (in shares) at Feb. 28, 2025			519,992			519,992