| COVER PAGE Document | Nov. 04, 2019 |
| COVER PAGE [Abstract] | |
| Written Communications | false |
| Entity Emerging Growth Company | false |
| Title of 12(b) Security | Common Stock, $0.001 par value |
| City Area Code | (512) |
| Entity Address, Address Line One | 12212 Technology Blvd., |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-30109 |
| Document Type | 8-K |
| Document Period End Date | Nov. 4, 2019 |
| Entity Central Index Key | 0001033905 |
| Amendment Flag | false |
| Entity Registrant Name | LUMINEX CORPORATION |
| Entity Tax Identification Number | 74-2747608 |
| Entity Address, City or Town | Austin, |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 78727 |
| Local Phone Number | 219-8020 |
| Trading Symbol | LMNX |
| Security Exchange Name | NASDAQ |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
