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Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Jan. 03, 2020
Dec. 28, 2018
Dec. 29, 2017
Statement of Comprehensive Income [Abstract]      
Unrealized gains or losses on available-for-sale securities, tax impact $ (1,049) $ 156 $ 0