Consolidated Statements of Stockholders' Equity - 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		22	10,854
Issuance of shares for employee stock option plan		763	291,066		(169,740)
Equity, Attributable to Parent, Ending Balance at May. 31, 2023	$ 50,092,730	102,127	10,947,089	42,128,256	(3,084,742)
Stock options issued for services			417,253
Net income	6,287,358			6,287,358
Repurchase of shares					0
Issuance of shares for employee stock purchase plan		10	9,904
Issuance of shares for employee stock option plan		1,919	955,286		(715,599)
Equity, Attributable to Parent, Ending Balance at May. 31, 2024	51,246,686	$ 104,056	12,959,531	51,127,018	(12,943,919)
Stock options issued for services			$ 1,047,252
Net income	$ 8,998,762			$ 8,998,762
Repurchase of shares					$ (9,143,578)