| Document and Entity Information | Feb. 26, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 26, 2021 |
| Entity Registrant Name | OXFORD IMMUNOTEC GLOBAL PLC |
| Entity Incorporation, State or Country Code | X0 |
| Entity File Number | 001-36200 |
| Entity Tax Identification Number | 98-1133710 |
| Entity Address, Address Line One | 94C Innovation Drive |
| Entity Address, Address Line Two | Milton Park |
| Entity Address, City or Town | Abingdon |
| Entity Address, Country | GB |
| Entity Address, Postal Zip Code | OX14 4RZ |
| City Area Code | 44 (0) |
| Local Phone Number | 1235 442780 |
| 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 | 0001586049 |
| Title of 12(b) Security | Ordinary Shares, £0.006705 nominal value per share |
| Trading Symbol | OXFD |
| Security Exchange Name | NASDAQ |
