General form of registration statement for all companies including face-amount certificate companies

Summary of Significant Accounting Policies - Receivables and Assets (Details)

v3.7.0.1
Summary of Significant Accounting Policies - Receivables and Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 30, 2017
Dec. 29, 2016
Mar. 31, 2016
Dec. 31, 2015
Receivables        
Allowance for doubtful accounts $ 259 $ 188 $ 149 $ 133
Inventory Valuation and Shrinkage        
Inventory valuation reserves $ 2,239 $ 2,449 $ 2,390 $ 2,476
Vendor Relationships        
Goodwill and Other Indefinite-Lived Intangible Assets        
Useful Life 10 years 10 years    
Minimum | Furniture, fixtures and equipment        
Fixed Assets        
Useful life 2 years 2 years    
Minimum | Leasehold improvements        
Fixed Assets        
Useful life 10 years 10 years    
Minimum | Computer software and hardware        
Fixed Assets        
Useful life 3 years 3 years    
Maximum | Furniture, fixtures and equipment        
Fixed Assets        
Useful life 7 years 7 years    
Maximum | Leasehold improvements        
Fixed Assets        
Useful life 25 years 25 years    
Maximum | Computer software and hardware        
Fixed Assets        
Useful life 7 years 7 years