| Document and Entity Information | Jan. 27, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 27, 2020 |
| Entity Registrant Name | Meridian Bioscience, Inc. |
| Entity Incorporation, State or Country Code | OH |
| Entity File Number | 000-14902 |
| Entity Tax Identification Number | 31-0888197 |
| Entity Address, Address Line One | 3471 RIVER HILLS DRIVE |
| Entity Address, City or Town | CINCINNATI |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 45244 |
| City Area Code | 513 |
| Local Phone Number | 271-3700 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000794172 |
| Title of 12(b) Security | Common Stock, no par value |
| Trading Symbol | VIVO |
| Security Exchange Name | NASDAQ |
