| Cover | Aug. 02, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 02, 2022 |
| Entity File Number | 001-12648 |
| Entity Registrant Name | UFP Technologies, Inc. |
| Entity Central Index Key | 0000914156 |
| Entity Tax Identification Number | 04-2314970 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 100 Hale Street |
| Entity Address, City or Town | Newburyport |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 01950-3504 |
| City Area Code | 978 |
| Local Phone Number | 352-2200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | UFPT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
