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Note 9 - Warrants (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 | Sep. 30, 2022 | Jun. 30, 2023 | Dec. 31, 2022
Class Of Warrant Or Right, Issued During Period (in shares) |  | 194,000 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 0.01 |  | $ 0.01 |
Class of Warrant or Right, Exercised During Period (in shares) |  |  |  | 194,000
Class of Warrant or Right, Granted During the Period, Fair Value Per Share (in dollars per share) |  |  |  | $ 50.32
Amortization of Warrants | $ 1,438,000 |  | $ 2,876,000 |
Current Prepaid Expenses [Member] |  |  |  |
Warrants and Rights Outstanding | 3,450 |  | 3,450 | $ 5,750,000
Other Assets [Member] |  |  |  |
Warrants and Rights Outstanding | $ 863 |  | $ 863 | $ 1,438,000

X
- Definition Represents amortization of warrants. + References No definition available. + Details
Name: | frpt_AmortizationOfWarrants
Namespace Prefix: | frpt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of warrants or rights exercised during period. + References No definition available. + Details
Name: | frpt_ClassOfWarrantOrRightExercisedDuringPeriod
Namespace Prefix: | frpt_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents fair value per share of warrants granted during the period. + References No definition available. + Details
Name: | frpt_ClassOfWarrantOrRightGrantedDuringThePeriodFairValuePerShare
Namespace Prefix: | frpt_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of warrants or rights issued during period. + References No definition available. + Details
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Namespace Prefix: | frpt_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-3 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References No definition available. + Details
Name: | us-gaap_WarrantsAndRightsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |