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Debt, Obligations Under Capital Leases and Deemed Landlord Financing Liabilities - 2015 Revolving Credit Facility (Successor) (Details) - USD ($)
12 Months Ended
Aug. 04, 2015
Jan. 01, 2019
Jan. 02, 2018
Jan. 03, 2017
Debt Instrument [Line Items]        
Amortization of deferred financing costs including debt discount       $ 400,000
Successor        
Debt Instrument [Line Items]        
Payments on revolving credit facility   $ 25,000,000 $ 37,500,000 $ 19,000,000
Amortization of deferred financing costs including debt discount   400,000 0  
Successor | 2015 Senior Credit Facility        
Debt Instrument [Line Items]        
Credit agreement issuance date Aug. 04, 2015      
Credit agreement maturity date Aug. 04, 2020      
Credit facility amount $ 250,000,000      
Credit facility   $ 17,300,000    
Credit fees applicable margin percentage (percent) 2.00% 1.75%    
Unused commitment fee percentage (percent) 0.25%      
Unamortized debt discount $ 1,400,000 $ 459,000 $ 747,000  
Deferred financing costs $ 500,000      
Interest rate on outstanding balance of credit facility (percent)   4.27%    
Availability for additional borrowings under credit facility   $ 73,700,000    
2015 Senior Credit Facility   $ 159,000,000    
Successor | 2015 Senior Credit Facility | Federal Funds Effective Swap        
Debt Instrument [Line Items]        
Effective base rate, margins on variable rate (percent) 0.50%      
Successor | 2015 Senior Credit Facility | LIBOR        
Debt Instrument [Line Items]        
Effective base rate, margins on variable rate (percent) 1.00%      
Credit facility margins on variable rate (percent) 2.00%      
Minimum | Successor | 2015 Senior Credit Facility | LIBOR        
Debt Instrument [Line Items]        
Credit facility margins on variable rate (percent) 1.50%      
Minimum | Successor | 2015 Senior Credit Facility | Base Rate        
Debt Instrument [Line Items]        
Credit facility margins on variable rate (percent) 0.50%      
Maximum | Successor | 2015 Senior Credit Facility | LIBOR        
Debt Instrument [Line Items]        
Credit facility margins on variable rate (percent) 2.50%      
Maximum | Successor | 2015 Senior Credit Facility | Base Rate        
Debt Instrument [Line Items]        
Credit facility margins on variable rate (percent) 1.50%