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LONG-TERM DEBT AND FINANCING LEASE OBLIGATIONS - Narrative (Details) - USD ($)
$ in Thousands
Jun. 20, 2019
Mar. 29, 2020
Dec. 29, 2019
Long-term debt      
Weighted average interest rate   5.00% 5.00%
Term Loan      
Long-term debt      
Maximum borrowing capacity $ 24,000    
Period of time, after the first year of the draw period, during which both principal and interest payments are due 5 years    
Debt principal amortization period 60 months    
Outstanding balance   $ 15,025 $ 6,924
Prepayment penalty $ 0    
Term Loan | Minimum | Prime Rate      
Long-term debt      
Rate of interest 5.00%