ASSET IMPAIRMENT, ESTIMATED LEASE TERMINATION AND OTHER CLOSING COSTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018
Asset Impairments and Business Exit Costs
Asset impairments, net	$ 282	$ 89
Asset impairment, estimated lease termination and other closing costs	1,296	145
Lease Termination Charges
Asset Impairments and Business Exit Costs
Business exit costs	926	(271)
Balance at Beginning of Period	431	1,799
Additions: Charged To Costs and Expenses	182	511
Deductions: Credits to Costs and Expenses and Other Accounts	(605)	(1,879)
Balance at End of Period	8	431
Restaurant Closure Expenses
Asset Impairments and Business Exit Costs
Business exit costs	$ 88	$ 327