Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Intangible Assets, Net - Summary of Intangible Assets (Detail) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 4,619 $ 4,719
Accumulated Amort. and Impairment (3,921) (3,750)
Net Carrying Amount $ 698 969
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) (2,620)
Net Carrying Amount 0 130
Patent license agreements    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 462 562
Accumulated Amort. and Impairment (337) (368)
Net Carrying Amount $ 125 194
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 (834) (762)
Net Carrying Amount $ 573 $ 645
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