ORGANIZATION AND RELATIONSHIPS (Details) $ in Thousands	12 Months Ended
	Dec. 29, 2024 USD ($) franchise salesChannel segment restaurant	Dec. 31, 2023 USD ($)	Oct. 20, 2017
Debt Securities, Available-for-Sale [Line Items]
Initial public offering percentage			20.00%
Number of franchise brands | franchise	18
Number of restaurants | restaurant	2,300
Percent of total restaurants franchised	92.00%
Number of sales channels | salesChannel	2
Number of operating segments | segment	1
Income (loss) from operations	$ (52,220)	$ 22,330
Accumulated deficit	458,624	268,777
Negative working capital	210,300
Redeemable preferred stock	91,836	91,836
Unrestricted cash	23,383	$ 37,044
Fixed Rate Secured Notes
Debt Securities, Available-for-Sale [Line Items]
Face amount of debt	100,600
Repurchased amount of notes	$ 64,200