Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock, Common
Equity, Attributable to Parent, Beginning Balance at May. 31, 2022		$ 101,342	$ 10,227,916	$ 35,840,898	$ (2,915,002)
Issuance of shares for employee stock purchase plan		15	5,654
Issuance of shares for employee stock option plan		100	32,120		0
Equity, Attributable to Parent, Ending Balance at Nov. 30, 2022	$ 45,983,359	101,457	10,394,127	38,402,777	(2,915,002)
Stock options issued for services			128,437
Net income	2,561,879			2,561,879
Equity, Attributable to Parent, Beginning Balance at Aug. 31, 2022		101,451	10,263,098	36,843,269	(2,915,002)
Issuance of shares for employee stock purchase plan		6	2,592
Issuance of shares for employee stock option plan		0	0		0
Equity, Attributable to Parent, Ending Balance at Nov. 30, 2022	45,983,359	101,457	10,394,127	38,402,777	(2,915,002)
Stock options issued for services			128,437
Net income	1,559,508			1,559,508
Equity, Attributable to Parent, Beginning Balance at May. 31, 2023	50,092,730	102,127	10,947,089	42,128,256	(3,084,742)
Issuance of shares for employee stock purchase plan		6	5,070
Issuance of shares for employee stock option plan		38	15,761		(15,799)
Equity, Attributable to Parent, Ending Balance at Nov. 30, 2023	54,228,325	102,171	11,269,228	45,957,467	(3,100,541)
Stock options issued for services			301,308
Net income	3,829,211			3,829,211
Equity, Attributable to Parent, Beginning Balance at Aug. 31, 2023		102,168	10,965,730	43,976,119	(3,100,541)
Issuance of shares for employee stock purchase plan		3	2,190
Issuance of shares for employee stock option plan		0	0		0
Equity, Attributable to Parent, Ending Balance at Nov. 30, 2023	54,228,325	$ 102,171	11,269,228	45,957,467	$ (3,100,541)
Stock options issued for services			$ 301,308
Net income	$ 1,981,348			$ 1,981,348