Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Components - Summary of Intangible Assets (Details)

v3.5.0.2
Balance Sheet Components - Summary of Intangible Assets (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]    
Gross carrying amount $ 1,232 $ 1,232
Accumulated amortization 1,048 1,003
Net amount $ 184 $ 229
Licenses    
Finite Lived Intangible Assets [Line Items]    
Estimated useful life of intangible assets 10 years 10 years
Gross carrying amount $ 185 $ 185
Accumulated amortization 109 100
Net amount $ 76 $ 85
Patents And Websites    
Finite Lived Intangible Assets [Line Items]    
Estimated useful life of intangible assets 5 years 5 years
Gross carrying amount $ 873 $ 873
Accumulated amortization 795 779
Net amount $ 78 $ 94
Commercial    
Finite Lived Intangible Assets [Line Items]    
Estimated useful life of intangible assets 2 years 2 years
Gross carrying amount $ 174 $ 174
Accumulated amortization 144 124
Net amount $ 30 $ 50