Consolidated Statements of Changes in Equity - 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
Cash contribution by 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	(495,681)	(495,681)	0	(495,681)
Net income	$ 0	$ 0	0	6,338,509	6,338,509	49,599	6,388,108
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	(587,226)	(587,226)	0	(587,226)
Net income	$ 0	$ 0	0	5,027,491	5,027,491	0	5,027,491
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	$ 0	$ 23,980,749