| Document And Entity Information | Feb. 22, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | FRESHPET, INC. |
| Document, Type | 8-K |
| Document, Period End Date | Feb. 22, 2021 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 001-36729 |
| Entity, Tax Identification Number | 20-1884894 |
| Entity, Address, Address Line One | 400 Plaza Drive, 1st Floor |
| Entity, Address, City or Town | Secaucus |
| Entity, Address, State or Province | NJ |
| Entity, Address, Postal Zip Code | 07094 |
| City Area Code | 201 |
| Local Phone Number | 520-4000 |
| 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 | FRPT |
| Security Exchange Name | NASDAQ |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001611647 |
