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Stockholders' Equity (Noncontrolling Interest) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Stockholders' Equity Note [Abstract]      
Present value of remaining purchase price $ 1,100    
Payment for noncontrolling interest 1,169 $ 1,947 $ 0
Variable consideration in accrued expense-other 500    
Variable consideration in other long-term liabilities $ 600