Commitments and Contingencies (Details) |
1 Months Ended | 3 Months Ended | 4 Months Ended | 9 Months Ended | 11 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2020
USD ($)
|
Apr. 30, 2020
USD ($)
Deposit
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Feb. 29, 2020
USD ($)
Deposit
|
Sep. 30, 2021
USD ($)
|
Sep. 30, 2020
USD ($)
|
Apr. 30, 2020
USD ($)
|
Sep. 30, 2021
USD ($)
|
Sep. 30, 2020
USD ($)
|
Dec. 15, 2020
USD ($)
|
Dec. 31, 2020
USD ($)
|
Dec. 31, 2019
USD ($)
|
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| Commitments And Contingencies [Line Items] | |||||||||||
| Operating leases, rent expense | $ 40,000 | $ 1,020,000 | $ 881,000 | $ 2,752,000 | $ 2,196,000 | $ 2,819,000 | $ 2,281,000 | ||||
| Assets held for sale | 732,000 | 732,000 | 732,000 | $ 732,000 | |||||||
| Loss contingency, allegations | A franchisee filed a suit against BFI seeking unspecified damages in connection with plaintiff’s execution of franchise agreements for the development of 11 BurgerFi restaurants in certain specified trade areas in New York and Connecticut. | ||||||||||
| Contingent liability | 0 | $ 0 | |||||||||
| Franchise Agreement Case [Member] | |||||||||||
| Commitments And Contingencies [Line Items] | |||||||||||
| Loss contingency, damages sought value | $ 5,000,000 | $ 5,000,000 | |||||||||
| Loss contingency, lawsuit filing date | April 2016 | April 2016 | |||||||||
| Employment Agreement Breach Case [Member] | |||||||||||
| Commitments And Contingencies [Line Items] | |||||||||||
| Loss contingency, lawsuit filing date | December 1, 2019 | December 1, 2019 | |||||||||
| Loss contingency motion to dismiss lawsuit filing date | February 13, 2020 | February 13, 2020 | |||||||||
| Employee Termination Case [Member] | |||||||||||
| Commitments And Contingencies [Line Items] | |||||||||||
| Loss contingency, lawsuit filing date | July 8, 2020 | July 8, 2020 | |||||||||
| Loss contingency, allegations | the former employee was terminated wrongfully by the Company | the former employee was terminated wrongfully by the Company | |||||||||
| BF Dania Beach, LLC [Member] | |||||||||||
| Commitments And Contingencies [Line Items] | |||||||||||
| Aggregate purchase price | $ 1,299,000 | ||||||||||
| Number of cash deposits | Deposit | 3 | 3 | |||||||||
| Cash deposits received | $ 906,500 | $ 906,500 | |||||||||
| Cash deposits returned to unrelated third-party purchaser | $ 906,500 | ||||||||||
| Assets held for sale | $ 732,000 | $ 732,000 | $ 732,000 | $ 732,000 | |||||||
| X | ||||||||||
- Definition Cash deposits received. No definition available.
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| X | ||||||||||
- Definition Cash deposits returned to unrelated third party purchaser. No definition available.
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| X | ||||||||||
- Definition Commitments and contingencies. No definition available.
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| X | ||||||||||
- Definition Loss contingency motion to dismiss lawsuit filing date. No definition available.
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| X | ||||||||||
- Definition Number of cash deposits. No definition available.
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| X | ||||||||||
- Definition Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. No definition available.
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| X | ||||||||||
- Definition Amount of loss contingency liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Presents an assertion of a fact by a plaintiff in a pleading or complaint, which the plaintiff claims it will prove upon presentation of evidence at the proceeding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition States the date the complaint was formally filed in a court of law, in arbitration or mediation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The net cash outflow or inflow from purchases, sales and disposals of property, plant and equipment and other productive assets, including intangibles. No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
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| X | ||||||||||
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| X | ||||||||||
- Details
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