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Goodwill and Intangible Assets - Acquired and Amortization (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Acquired identifiable intangible assets      
Total intangible asset cost $ 12,400 $ 12,444  
Accumulated amortization (7,292) (5,968)  
Total intangible assets, net 5,108 6,476  
Amortization Expense      
2021 927    
2022 827    
2023 822    
2024 822    
2025 822    
Thereafter 888    
Total 5,108    
Amortization of expenses related to intangible assets 1,400 1,400 $ 1,400
Non-competition agreements      
Acquired identifiable intangible assets      
Total intangible asset cost 280 324  
Customer relationships      
Acquired identifiable intangible assets      
Total intangible asset cost $ 12,120 $ 12,120