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Income Taxes (Components of Income Tax Expense (Benefit)) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 29, 2017
Dec. 30, 2016
Jan. 01, 2016
Current:      
Federal $ 0 $ 0 $ 0
State 4,350 0 55
Total current tax expense 4,350 0 55
Deferred:      
Federal 0 0 0
State 0 0 0
Total deferred tax expense 0 0 0
Provision for income taxes $ 4,350 $ 0 $ 55