| Document and Entity Information | Jan. 27, 2021 |
| Entity Addresses [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 27, 2021 |
| Entity Registrant Name | BurgerFi International, Inc. |
| Entity Central Index Key | 0001723580 |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity File Number | 001-38417 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 82-2418815 |
| Entity Address, Address Line One | 105 US Highway 1 |
| Entity Address, City or Town | North Palm Beach |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33408 |
| City Area Code | 561 |
| Local Phone Number | 844-5528 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Common Stock, par value $0.0001 per share | |
| Entity Addresses [Line Items] | |
| Title of 12(b) Security | Common stock, par value $0.0001 per share |
| Trading Symbol | BFI |
| Security Exchange Name | NASDAQ |
| Redeemable warrants, each exercisable for one share of common stock at an exercise price of $11.50 per share | |
| Entity Addresses [Line Items] | |
| Title of 12(b) Security | Redeemable warrants, each exercisable for one share of common stock at an exercise price of $11.50 per share |
| Trading Symbol | BFIIW |
| Security Exchange Name | NASDAQ |
