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INCOME TAXES - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 28, 2025
Dec. 29, 2024
Dec. 31, 2023
Operating Loss Carryforwards [Line Items]      
Income tax expense (benefit) $ 46,000 $ (1,301,000) $ 379,000
Net deferred tax asset position 240,400,000 202,700,000  
Valuation allowance 240,676,000 202,709,000  
Increase in valuation allowance 38,000,000.0    
Unrecognized tax benefits 2,112,000 93,000 $ 431,000
Impact of unrecognized tax benefits, if recognized 0    
Interest of penalties associated with any uncertain tax positions 0 $ 0  
ERC payment received $ 3,600,000    
Government Assistance, Income, Increase (Decrease), Statement of Income or Comprehensive Income [Extensible Enumeration] Other current assets    
Labor and related expenses      
Operating Loss Carryforwards [Line Items]      
ERC benefit $ 1,800,000    
General and Administrative Expense      
Operating Loss Carryforwards [Line Items]      
ERC benefit 5,100,000    
U.S. Federal      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards 867,600,000    
Net operating loss carryforwards subject to expiration 101,900,000    
Net operating loss carryforwards not subject to expiration 765,700,000    
State      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards 787,600,000    
Net operating loss carryforwards subject to expiration 694,100,000    
Net operating loss carryforwards not subject to expiration $ 93,500,000