LEASES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Total finance lease expense	$ 27	$ 24	$ 50	$ 48
Total operating lease expense	523	619	1,124	1,276
Total lease expense	550	643	1,174	1,324
SG&A Expense
Total finance lease expense	22	19	41	38
Total operating lease expense	416	467	865	905
Interest Expense, Net
Total finance lease expense	5	5	9	10
Operating Costs
Total operating lease expense	$ 107	$ 152	$ 259	$ 371