Cover - shares	9 Months Ended
	Feb. 29, 2024	Apr. 12, 2024
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Feb. 29, 2024
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--05-31
Entity File Number	001-37863
Entity Registrant Name	BIOMERICA, INC.
Entity Central Index Key	0000073290
Entity Tax Identification Number	95-2645573
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	17571 Von Karman Avenue
Entity Address, City or Town	Irvine
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92614
City Area Code	949
Local Phone Number	645-2111
Title of 12(b) Security	COMMON STOCK, PAR VALUE $0.08
Trading Symbol	BMRA
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		16,821,646