Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets, Net - Summary of Intangible Assets (Details)

v3.8.0.1
Intangible Assets, Net - Summary of Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 4,619 $ 4,619
Accumulated Amort. and Impairment (4,015) (3,968)
Net Carrying Amount $ 604 651
Product design intellectual property    
Finite-Lived Intangible Assets [Line Items]    
Useful Life 4 years  
Gross Carrying Amount $ 2,750 2,750
Accumulated Amort. and Impairment (2,750) (2,750)
Net Carrying Amount 0 0
Patent license agreements    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 462 462
Accumulated Amort. and Impairment (382) (360)
Net Carrying Amount $ 80 102
Domain and trade names    
Finite-Lived Intangible Assets [Line Items]    
Useful Life 10 years  
Gross Carrying Amount $ 1,407 1,407
Accumulated Amort. and Impairment (883) (858)
Net Carrying Amount $ 524 $ 549
Minimum | Patent license agreements    
Finite-Lived Intangible Assets [Line Items]    
Useful Life 3 years  
Maximum | Patent license agreements    
Finite-Lived Intangible Assets [Line Items]    
Useful Life 5 years