Note 2 - Earning Per Share - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($)	12 Months Ended
	May 31, 2025	May 31, 2024
Net income (loss) attributable to common stockholders	$ 1,922,297	$ 4,440,265
Basic (in shares)	28,063,545	28,279,701
Basic (in dollars per share)	$ 0.07	$ 0.16
Weighted-average shares outstanding - basic (in shares)	28,063,545	28,279,701
Incremental shares from assumed conversion of options warrants and preferred stock, as appropriate (in shares)	495,815	495,283
Weighted average common stock outstanding - diluted (in shares)	28,559,360	28,774,984
Diluted (in dollars per share)	$ 0.07	$ 0.15