SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2025	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022
Property, Plant and Equipment [Line Items]
Advertising expense	$ 4,900	$ 6,100	$ 9,200
Beginning balance	$ 2,190	1,009	$ 2,005	$ 3,212
Terms of lease agreements	15 years
Reporting unit, percentage of fair value in excess of carrying amount	20.00%
Goodwill, impairment charge		59,074
Deferred recognition of certain benefits	$ 5,200	$ 5,200
Professional Fees	(600)
Government Assistance, Expense, Decrease (Increase)	$ 2,100
Government Assistance, Expense, Decrease (Increase), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest and other income (expense), net
Selling, General and Administrative Expenses
Property, Plant and Equipment [Line Items]
Government Assistance, Expense, Decrease (Increase)	$ 6,000
Government Assistance, Expense, Decrease (Increase), Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, general and administrative expense
Cost of Sales
Property, Plant and Equipment [Line Items]
Government Assistance, Expense, Decrease (Increase)	$ 3,200
Government Assistance, Expense, Decrease (Increase), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of services
CARES Act
Property, Plant and Equipment [Line Items]
Deferred recognition of certain benefits	$ 5,100
Buildings
Property, Plant and Equipment [Line Items]
Useful life	40 years
Minimum
Property, Plant and Equipment [Line Items]
Terms of lease agreements	3 years
Minimum | Software
Property, Plant and Equipment [Line Items]
Useful life	4 years
Minimum | Computers, furniture and equipment
Property, Plant and Equipment [Line Items]
Useful life	3 years
Maximum
Property, Plant and Equipment [Line Items]
Terms of lease agreements	5 years
Maximum | Software
Property, Plant and Equipment [Line Items]
Useful life	8 years
Maximum | Computers, furniture and equipment
Property, Plant and Equipment [Line Items]
Useful life	10 years