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, 2023		$ 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
Equity, Attributable to Parent, Beginning Balance at May. 31, 2024	51,246,686	104,056	12,959,531	51,127,018	(12,943,919)
Issuance of shares for employee stock purchase plan		2	3,660
Issuance of shares for employee stock option plan		506	225,646		(131,542)
Equity, Attributable to Parent, Ending Balance at Nov. 30, 2024	55,798,977	104,564	13,920,041	54,849,833	(13,075,461)
Stock options issued for services			731,204
Net income	3,722,815			3,722,815
Equity, Attributable to Parent, Beginning Balance at Aug. 31, 2024		104,076	12,970,524	53,793,673	(12,943,919)
Issuance of shares for employee stock purchase plan		1	1,234
Issuance of shares for employee stock option plan		487	217,079		(131,542)
Equity, Attributable to Parent, Ending Balance at Nov. 30, 2024	55,798,977	$ 104,564	13,920,041	54,849,833	$ (13,075,461)
Stock options issued for services			$ 731,204
Net income	$ 1,056,160			$ 1,056,160