Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Components - Summary of Changes in Net Carrying Values of Intangible Assets (Details)

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Balance Sheet Components - Summary of Changes in Net Carrying Values of Intangible Assets (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]    
Gross carrying amount $ 84,242 $ 6,584
Accumulated amortization 4,706 2,829
Net amount $ 79,536 $ 3,755
Technology    
Finite Lived Intangible Assets [Line Items]    
Average estimated useful lives (in years) 10 years  
Gross carrying amount $ 77,700  
Accumulated amortization 971  
Net amount $ 76,729  
Licenses    
Finite Lived Intangible Assets [Line Items]    
Average estimated useful lives (in years) 10 years 10 years
Gross carrying amount $ 185 $ 185
Accumulated amortization 162 155
Net amount $ 23 $ 30
Patents And Websites    
Finite Lived Intangible Assets [Line Items]    
Average estimated useful lives (in years) 5 years 5 years
Gross carrying amount $ 4,164 $ 4,164
Accumulated amortization 2,139 1,640
Net amount $ 2,025 $ 2,524
Customer Relationships    
Finite Lived Intangible Assets [Line Items]    
Average estimated useful lives (in years) 4 years 4 years
Gross carrying amount $ 1,310 $ 1,373
Accumulated amortization 792 572
Net amount $ 518 $ 801
Non-Compete Agreement    
Finite Lived Intangible Assets [Line Items]    
Average estimated useful lives (in years) 2 years 3 months 18 days 2 years 3 months 18 days
Gross carrying amount $ 219 $ 229
Accumulated amortization 219 154
Net amount   75
Commercials    
Finite Lived Intangible Assets [Line Items]    
Gross carrying amount 664 633
Accumulated amortization 423 308
Net amount $ 241 $ 325
Commercials | Minimum    
Finite Lived Intangible Assets [Line Items]    
Average estimated useful lives (in years) 2 years 2 years
Commercials | Maximum    
Finite Lived Intangible Assets [Line Items]    
Average estimated useful lives (in years) 3 years 3 years