Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Income Per Share of Common Stock -
Net income attributable to common stockholders	$ 3,562,996	$ 452,458	$ 4,471,124	$ 3,044,535
Weighted-average shares outstanding - basic	28,279,701	28,472,639	28,279,701	28,472,256
Income per share of common stock – basic	$ 0.13	$ 0.02	$ 0.16	$ 0.11
Net income attributable to common stockholders	$ 3,562,996	$ 452,458	$ 4,471,124	$ 3,044,535
Add: Preferred stock dividends for assumed conversion	132,500		361,267	243,082
Net income attributable to common stockholders	$ 3,695,496	$ 452,458	$ 4,832,391	$ 3,287,617
Incremental shares from assumed conversion of warrants or options, as appropriate	3,824,564	494,505	3,825,723	3,828,828
Weighted average common stock outstanding - diluted	32,104,265	28,967,144	32,105,424	32,301,084
Income per share of common stock – diluted	$ 0.12	$ 0.02	$ 0.15	$ 0.10