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Consolidated Condensed Balance Sheets (Parenthetical) - $ / shares
Jun. 28, 2021
Dec. 28, 2020
Statement Of Financial Position [Abstract]    
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 300,000,000 300,000,000
Common stock, shares issued 108,145,000 106,770,000
Common stock, shares outstanding 107,784,000 106,770,000
Treasury stock, common shares 361,000