Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock
Stockholders' Equity Attributable to Parent, Beginning Balance at May. 31, 2021		$ 101,305	$ 10,010,430	$ 33,601,475	$ (2,915,002)
Issuance of shares for employee stock purchase plan		27	12,308
Issuance of shares for employee stock option plan		0	0		0
Stockholders' Equity Attributable to Parent, Ending Balance at Feb. 28, 2022	$ 41,660,695	101,332	10,148,502	34,325,863	(2,915,002)
Stock options issued for services			125,764
Net income	724,388			724,388
Stockholders' Equity Attributable to Parent, Beginning Balance at Nov. 30, 2021		101,323	10,144,275	34,443,156	(2,915,002)
Issuance of shares for employee stock purchase plan		9	4,227
Issuance of shares for employee stock option plan		0	0		0
Stockholders' Equity Attributable to Parent, Ending Balance at Feb. 28, 2022	41,660,695	101,332	10,148,502	34,325,863	(2,915,002)
Stock options issued for services			0
Net income	(117,293)			(117,293)
Stockholders' Equity Attributable to Parent, Beginning Balance at May. 31, 2022	43,255,154	101,342	10,227,916	35,840,898	(2,915,002)
Issuance of shares for employee stock purchase plan		20	8,083
Issuance of shares for employee stock option plan		344	137,750		(54,705)
Stockholders' Equity Attributable to Parent, Ending Balance at Feb. 28, 2023	47,695,849	101,706	10,502,186	40,061,664	(2,969,707)
Stock options issued for services			128,437
Net income	4,220,766			4,220,766
Stockholders' Equity Attributable to Parent, Beginning Balance at Nov. 30, 2022		101,457	10,394,127	38,402,777	(2,915,002)
Issuance of shares for employee stock purchase plan		5	2,429
Issuance of shares for employee stock option plan		244	105,630		(54,705)
Stockholders' Equity Attributable to Parent, Ending Balance at Feb. 28, 2023	47,695,849	$ 101,706	10,502,186	40,061,664	$ (2,969,707)
Stock options issued for services			$ 0
Net income	$ 1,658,887			$ 1,658,887