COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands		12 Months Ended	23 Months Ended
	Jan. 30, 2019 USD ($)	Dec. 27, 2020 USD ($)	Dec. 27, 2020 USD ($)	Dec. 29, 2024 restaurant ft²	May 10, 2024 violation
Loss Contingencies [Line Items]
Area of leased space (square feet) | ft²				8,300
Number of restaurants | restaurant				170
Company-Owned
Loss Contingencies [Line Items]
Number of restaurants | restaurant				89
Minimum
Loss Contingencies [Line Items]
Remaining lease term				6 months
Maximum
Loss Contingencies [Line Items]
Remaining lease term				23 years
Fat Brands | Related Party
Loss Contingencies [Line Items]
Payment for origination of related party notes receivable			$ 2,650
Fat Brands | Chief Executive Officer
Loss Contingencies [Line Items]
Payment for origination of related party notes receivable	$ 600
Fat Brands | Parent Company
Loss Contingencies [Line Items]
Payment for origination of related party notes receivable		$ 2,000
Fat Brands | Government Investigations and Litigation
Loss Contingencies [Line Items]
Number of violations | violation					2