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Income Taxes - Components of Net Deferred Income Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Deferred income tax assets:      
Inventory reserves $ 1,654 $ 2,088  
Compensation-related accruals 3,692 4,465  
Accruals and reserves 72 112  
Accounts receivable 443 656  
Intangible assets 0 583  
Property and equipment 4,614 1,134  
Pension 7,011 10,747  
Benefit from net operating loss (“NOL”) carryovers 46,873 78,236  
Other 285 194  
Total gross deferred income tax assets 64,644 98,215  
Less: valuation allowances (10,415) (97,552) $ (103,311)
Total net deferred income tax assets 54,229 663  
Deferred income tax liabilities:      
Other (376) (663)  
Total deferred income tax liabilities (376) (663)  
Deferred Income Tax Assets, Net 53,853 $ 0  
Operating Loss Carryforwards [Line Items]      
Federal NOL carryovers 158,200    
State NOL carryovers $ 245,700    
Minimum      
Operating Loss Carryforwards [Line Items]      
Federal operating loss carryforwards expiration term 13 years    
State operating loss carryforwards expiration term 1 year    
Maximum      
Operating Loss Carryforwards [Line Items]      
Federal operating loss carryforwards expiration term 18 years    
State operating loss carryforwards expiration term 20 years