LEASES - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2023	Jun. 29, 2022	Jun. 28, 2023	Jun. 29, 2022
Lessee, Lease, Description [Line Items]
Amortization of right-to-use assets	$ 19	$ 19	$ 38	$ 38
Interest on lease liabilities	10	11	21	24
Operating Lease, Cost	7,111	6,843	14,145	13,670
Short-term Lease, Cost	1	4	4	8
Variable Lease, Cost	333	320	708	574
Sublease Income	(1,246)	(1,129)	(2,493)	(2,257)
Total lease cost	6,228	6,068	12,423	12,057
Operating Expense [Member]
Lessee, Lease, Description [Line Items]
Total lease cost	6,048	5,912	12,057	11,742
General and Administrative Expense
Lessee, Lease, Description [Line Items]
Total lease cost	133	105	269	210
Depreciation and amortization [Member]
Lessee, Lease, Description [Line Items]
Total lease cost	19	18	38	37
Interest Expense
Lessee, Lease, Description [Line Items]
Total lease cost	10	11	21	24
Restructuring Charges [Member]
Lessee, Lease, Description [Line Items]
Total lease cost	18	22	38	44
Property Lease [Member]
Lessee, Lease, Description [Line Items]
Amortization of right-to-use assets	19	18	37	37
Interest on lease liabilities	10	10	20	22
Operating Lease, Cost	6,873	6,585	13,705	13,149
Variable Lease, Cost	130	171	272	307
Sublease Income	(1,246)	(1,129)	(2,493)	(2,257)
Total lease cost	5,786	5,655	11,541	11,258
Equipment Lease
Lessee, Lease, Description [Line Items]
Amortization of right-to-use assets		1	1	1
Interest on lease liabilities		1	1	2
Operating Lease, Cost	238	258	440	521
Short-term Lease, Cost	1	4	4	8
Variable Lease, Cost	203	149	436	267
Total lease cost	$ 442	$ 413	$ 882	$ 799