LEASES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020
Total finance lease expense	$ 23	$ 31	$ 74	$ 79
Total operating lease expense	593	594	1,718	1,870
Total lease expense	616	625	1,792	1,949
SG&A Expense
Total finance lease expense	19	26	61	64
Total operating lease expense	462	459	1,327	1,364
Interest Expense, Net
Total finance lease expense	4	5	13	15
Operating Costs
Total operating lease expense	$ 131	$ 135	$ 391	$ 506