Commitments and Contingencies - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments And Contingencies [Line Items]
Rent expense related to non-cancelable operating leases	$ 393,718	$ 404,438	$ 481,269
Vendor incentive agreement description	In November 2015, Freshpet entered into an incentive agreement with a vendor. Under the terms of the agreement, a cash incentive will be earned by the vendor upon achievement of certain performance goals that must be reached by the end of the contract term, which expires on November 30, 2017. The incentive payout is based on the fair value of the Company’s common stock price as of the achievement date specified within the contract. As of December 31, 2015, the Company does not believe it is probable that the vendor will reach the performance goals during the term of the contract and accordingly has not provided an accrual for this agreement. However, if the performance goal were deemed probable as of December 31, 2015, the Company would have established an accrual ranging from $250,000 to $850,000, depending on the goal achieved.
Vendor incentive agreement date	Nov. 01, 2015
Performance based incentive expiration date	Nov. 30, 2017
Minimum
Commitments And Contingencies [Line Items]
Performance based incentive accrual amount	$ 250,000
Maximum
Commitments And Contingencies [Line Items]
Performance based incentive accrual amount	$ 850,000