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Lessee ROU Assets and Lease Liabilities Lessee Operating Lease Balance Sheet Classification (Details) - USD ($)
Jun. 27, 2020
Dec. 28, 2019
Leases [Abstract]    
Lessee ROU assets $ 25,609,000 $ 19,137,000
Lessee lease liabilities, current 4,776,000 4,653,000
Lessee lease liabilities, non-current 22,384,000 15,834,000
Present value $ 27,160,000 $ 20,487,000