ORGANIZATION AND RELATIONSHIPS - Narrative (Details) $ in Thousands	3 Months Ended
Mar. 27, 2022 USD ($) location franchise	Mar. 28, 2021 USD ($)	Dec. 26, 2021 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of franchise brands \| franchise	17
Number of stores \| location	2,360
Number of franchise units worldwide \| franchise	2,230
Percent of total restaurants franchised	94.00%
Income (loss) from operations	$ 485	$ 89
Accumulated deficit	(76,234)		$ (52,479)
Working capital	(164,700)
Redeemable preferred stock	135,000		67,500
Cash	$ 28,973		$ 56,656

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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