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Equity in Net Assets of Non-Consolidated Investee - Summarized Income Statement Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Income Statement      
Our share of net loss $ (1,383) $ (1,804) $ (1,304)
Non-consolidated investee      
Income Statement      
Revenues 6,771 6,046 3,871
Net loss $ (5,739) $ (5,481) $ (5,632)