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Consolidated Statements of Changes in Equity (Unaudited) - USD ($)
Preferred Stock [Member]
Common Stock [Member]
Treasury Stock, Common [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Balances (in shares) at May. 31, 2024 50,000 28,279,701        
Balances at May. 31, 2024 $ 5 $ 2,828 $ 0 $ 53,533,272 $ (29,555,356) $ 23,980,749
Balances (in shares) at May. 31, 2024     0      
Preferred dividends 0 0 $ 0 0 (148,082) (148,082)
Net income $ 0 $ 0 0 0 335,454 335,454
Balances (in shares) at Aug. 31, 2024 50,000 28,279,701        
Balances at Aug. 31, 2024 $ 5 $ 2,828 $ 0 53,533,272 (29,367,984) 24,168,121
Balances (in shares) at Aug. 31, 2024     0      
Balances (in shares) at May. 31, 2024 50,000 28,279,701        
Balances at May. 31, 2024 $ 5 $ 2,828 $ 0 53,533,272 (29,555,356) 23,980,749
Balances (in shares) at May. 31, 2024     0      
Net income           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      
Balances (in shares) at Aug. 31, 2024 50,000 28,279,701        
Balances at Aug. 31, 2024 $ 5 $ 2,828 $ 0 53,533,272 (29,367,984) 24,168,121
Balances (in shares) at Aug. 31, 2024     0      
Preferred dividends 0 0 $ 0 0 (140,583) (140,583)
Net income $ 0 $ 0 0 0 (204,714) (204,714)
Balances (in shares) at Nov. 30, 2024 50,000 28,279,701        
Balances at Nov. 30, 2024 $ 5 $ 2,828 $ 0 53,533,272 (29,713,281) 23,822,824
Balances (in shares) at Nov. 30, 2024     0      
Preferred dividends 0 0 $ 0 0 (115,798) (115,798)
Net income $ 0 $ 0 $ 0 0 965,665 965,665
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)     519,992      
Repurchase of common stock     $ (546,035) 0 0 (546,035)
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      
Balances (in shares) at May. 31, 2025 0 27,879,701        
Balances at May. 31, 2025 $ 0 $ 2,788 $ (606,737) 48,113,317 (27,633,059) $ 19,876,309
Balances (in shares) at May. 31, 2025     519,124     519,124
Net income $ 0 $ 0 $ 0 0 (1,099,022) $ (1,099,022)
Repurchase of common stock (in shares)     89,876      
Repurchase of common stock     $ (123,147) 0 0 (123,147)
Balances (in shares) at Aug. 31, 2025 0 27,879,701        
Balances at Aug. 31, 2025 $ 0 $ 2,788 $ (729,884) 48,113,317 (28,732,081) 18,654,140
Balances (in shares) at Aug. 31, 2025     609,000      
Balances (in shares) at May. 31, 2025 0 27,879,701        
Balances at May. 31, 2025 $ 0 $ 2,788 $ (606,737) 48,113,317 (27,633,059) $ 19,876,309
Balances (in shares) at May. 31, 2025     519,124     519,124
Net income           $ (5,965,195)
Balances (in shares) at Feb. 28, 2026 0 27,879,701        
Balances at Feb. 28, 2026 $ 0 $ 2,788 $ (729,884) 48,113,317 (33,598,254) $ 13,787,967
Balances (in shares) at Feb. 28, 2026     609,000     609,000
Balances (in shares) at Aug. 31, 2025 0 27,879,701        
Balances at Aug. 31, 2025 $ 0 $ 2,788 $ (729,884) 48,113,317 (28,732,081) $ 18,654,140
Balances (in shares) at Aug. 31, 2025     609,000      
Net income $ 0 $ 0 $ 0 0 (2,064,095) (2,064,095)
Balances (in shares) at Nov. 30, 2025 0 27,879,701        
Balances at Nov. 30, 2025 $ 0 $ 2,788 $ (729,884) 48,113,317 (30,796,176) 16,590,045
Balances (in shares) at Nov. 30, 2025     609,000      
Net income $ 0 $ 0 $ 0 0 (2,802,078) (2,802,078)
Balances (in shares) at Feb. 28, 2026 0 27,879,701        
Balances at Feb. 28, 2026 $ 0 $ 2,788 $ (729,884) $ 48,113,317 $ (33,598,254) $ 13,787,967
Balances (in shares) at Feb. 28, 2026     609,000     609,000