| Document And Entity Information | Dec. 16, 2021 |
| Document Information Line Items | |
| Entity Registrant Name | BIOMERICA, INC. |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Central Index Key | 0000073290 |
| Document Period End Date | Dec. 16, 2021 |
| Entity Emerging Growth Company | false |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-37863 |
| Entity Tax Identification Number | 95-2645573 |
| Entity Address, Address Line One | 17571 Von Karman Ave |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
