| Cover | Mar. 21, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 21, 2022 |
| Entity File Number | 001-37526 |
| Entity Registrant Name | TELA Bio, Inc. |
| Entity Central Index Key | 0001561921 |
| Entity Tax Identification Number | 45-5320061 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1 Great Valley Parkway |
| Entity Address, Address Line Two | Suite 24 |
| Entity Address, City or Town | Malvern |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19355 |
| City Area Code | 484 |
| Local Phone Number | 320-2930 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | TELA |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
