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INCOME TAXES - Narrative (Details) - USD ($)
 12 Months Ended
Sep. 24, 2023
Sep. 25, 2022
Sep. 29, 2024
Income Tax Contingency [Line Items]      
Unrecognized tax benefits that would impact effective tax rate     $ 2,200,000
Accrued interest related to unrecognized tax benefits $ 1,200,000   500,000
Accrued penalties related to unrecognized tax benefits 0   0
Deferred tax asset 9,800,000   16,100,000
Valuation allowance 25,765,000   26,500,000
Valuation allowance, increase (decrease) (900,000) $ (1,000,000)  
Operating loss carryforwards 25,749,000   25,267,000
State and Local Jurisdiction      
Income Tax Contingency [Line Items]      
Unrecognized tax benefits related to net operating loss $ 10,700,000   11,400,000
State tax benefits in net operating loss carryforwards     43,300,000
Operating loss carryforwards, subject to expiration     41,300,000
Operating loss carryforwards, not subject to expiration     2,000,000
Operating loss carryforwards     $ 34,200,000