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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, 2020 | Dec. 31, 2019
Finite Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 84,473 | $ 84,282
Accumulated amortization | 13,464 | 6,749
Net amount | $ 71,009 | $ 77,533
Technology |  |
Finite Lived Intangible Assets [Line Items] |  |
Average estimated useful lives (in years) | 10 years | 10 years
Gross carrying amount | $ 77,700 | $ 77,700
Accumulated amortization | 8,741 | 2,914
Net amount | $ 68,959 | $ 74,786
Licenses |  |
Finite Lived Intangible Assets [Line Items] |  |
Average estimated useful lives (in years) | 10 years | 10 years
Gross carrying amount | $ 185 | $ 185
Accumulated amortization | 171 | 165
Net amount | $ 14 | $ 20
Patents And Websites |  |
Finite Lived Intangible Assets [Line Items] |  |
Average estimated useful lives (in years) | 5 years | 5 years
Gross carrying amount | $ 4,483 | $ 4,274
Accumulated amortization | 2,834 | 2,308
Net amount | $ 1,649 | $ 1,966
Customer Relationships |  |
Finite Lived Intangible Assets [Line Items] |  |
Average estimated useful lives (in years) | 4 years | 4 years
Gross carrying amount | $ 1,407 | $ 1,346
Accumulated amortization | 1,202 | 897
Net amount | 205 | 449
Commercials |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 698 | 777
Accumulated amortization | 516 | 465
Net amount | $ 182 | $ 312
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

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