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Income Taxes - A Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
A reconciliation of the beginning and ending amount of unrecognized tax benefits    
Balance at the beginning of the year $ 1,192 $ 1,155
Additions based upon tax positions related to the current year 28 37
Balance at the end of the year $ 1,220 $ 1,192