Document And Entity Information - USD ($)	Dec. 31, 2020	Apr. 19, 2021	Jun. 30, 2020
Document Information [Line Items]
Entity, Registrant Name	Freshpet, Inc.
Current Fiscal Year End Date	--12-31
Document, Fiscal Period Focus	FY
Document, Fiscal Year Focus	2020
Document, Type	10-K/A
Document, Annual Report	true
Document, Period End Date	Dec. 31, 2020
Document, Transition Report	false
Entity, File Number	001-36729
Entity, Incorporation, State or Country Code	DE
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
Title of 12(b) Security	Common Stock
Trading Symbol	FRPT
Security Exchange Name	NASDAQ
Entity, Well-known Seasoned Issuer	Yes
Entity, Voluntary Filers	No
Entity, Current Reporting Status	Yes
Entity, Interactive Data, Current	Yes
Entity, Filer Category	Large Accelerated Filer
Entity, Small Business	false
Entity, Emerging Growth Company	false
Entity, Shell Company	false
Entity, Public Float			$ 3,200,000,000
Entity, Common Stock Shares, Outstanding		43,258,748
Amendment Description	Freshpet, Inc. (“Freshpet,” the “Company,” “we,” “our” or “us”) is filing this Amendment No. 1 on Form 10-K/A (this “Amendment”) to amend the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020, originally filed with the Securities and Exchange Commission (the “SEC”) on February 22, 2021 (the “2020 10-K”), to include the information required by Items 10 through 14 of Part III of Form 10-K. This information was previously omitted from the 2020 10-K in reliance on General Instruction G(3) to Form 10-K, which permits the information in the above referenced items to be incorporated in the Form 10-K by reference from the Company’s definitive proxy statement if such statement is filed no later than 120 days after the Company’s fiscal year-end. We are filing this Amendment to provide the information required in Part III of Form 10-K because a definitive proxy statement containing such information will not be filed by the Company within 120 days after the end of the fiscal year covered by the 2020 10-K.
Amendment Flag	true
Entity, Central Index Key	0001611647