Annual report pursuant to Section 13 and 15(d)

Property and Equipment, Net - Additional Information (Details)

v3.8.0.1
Property and Equipment, Net - Additional Information (Details)
$ in Thousands
 12 Months Ended
Apr. 17, 2013
USD ($)
Dec. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Jan. 02, 2016
USD ($)
Property, Plant and Equipment [Line Items]        
Depreciation and amortization expense   $ 6,397 $ 7,510 $ 7,510
Amortization expense related to capital leased asset     475 $ 475
Property and equipment, gross carrying value   48,041 52,266  
Property and equipment, accumulated depreciation   (32,956) (35,788)  
Property and equipment, net   15,085 16,478  
Philippines        
Property, Plant and Equipment [Line Items]        
Property and equipment, net   $ 269 367  
Facility subject to capital lease        
Property, Plant and Equipment [Line Items]        
Excess of net proceeds over the net carrying value of capital leased asset under sale and lease back $ 376      
Estimated useful life of property and equipment 20 years 20 years    
Property and equipment, gross carrying value   $ 11,306 11,306  
Property and equipment, accumulated depreciation   (3,121) (2,273)  
Property and equipment, net   8,185 $ 9,033  
LaSalle, Illinois Facility        
Property, Plant and Equipment [Line Items]        
Amortization expense related to capital leased asset   $ 475    
Period of lease under sale and lease back transaction 20 years      
Initial base annual rent for first year $ 853      
Percentage of annual increase in base rent 1.50%      
Increased percentage in base rent with change in consumer price index 1.25      
LaSalle, Illinois Facility | Whitney Automotive Group (WAG)        
Property, Plant and Equipment [Line Items]        
Gross proceeds from sale of La Salle, Illinois facility $ 9,750      
Net proceeds from sale of La Salle, Illinois facility $ 9,507