v3.8.0.1
Summary of Accounting Policies - Property and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 9,181 $ 9,201
Less accumulated depreciation (5,530) (4,254)
Property and equipment, net 3,651 4,947
Computer equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 2,926 2,365
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 1,680 1,574
Software    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 1,241 1,373
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 3,334 $ 3,889
Minimum | Computer equipment    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 3 years  
Minimum | Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 3 years  
Minimum | Software    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 3 years  
Maximum | Computer equipment    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 5 years  
Maximum | Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 5 years  
Maximum | Software    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 6 years