Note 2 - Earning (Loss) Per Share - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended
	Aug. 31, 2025	Aug. 31, 2024
Net income (loss) attributable to common stockholders	$ (1,099,022)	$ 187,372
Basic (in shares)	27,278,050	28,279,701
Basic (in dollars per share)	$ (0.04)	$ 0.01
Weighted-average shares outstanding - basic (in shares)	27,278,050	28,279,701
Incremental shares from assumed conversion of options warrants and preferred stock, as appropriate (in shares)	496,055	496,295
Weighted average common stock outstanding - diluted (in shares)	27,774,105	28,775,996
Diluted (in dollars per share)	$ (0.04)	$ 0.01