| Document and Entity Information | Mar. 04, 2021 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001723580 |
| Document Type | 8-K |
| Document Period End Date | Mar. 4, 2021 |
| Entity Registrant Name | BurgerFi International, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-38417 |
| 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 |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Common Stock Par Value 0.0001 Per Share 2 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 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 1 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 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 |
