Balance Sheet Components - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (26,135)	$ (17,436)
Total intangible assets, net	16,746
Total Gross	42,881	41,056
Intangible Assets, Net (Excluding Goodwill)	16,746	23,620
Amortization of Intangible Assets	8,699	7,926	$ 5,722
Developed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	37,813	35,988
Accumulated Amortization	(23,910)	(15,983)
Total intangible assets, net	13,903	20,005
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	3,790	3,790
Accumulated Amortization	(991)	(451)
Total intangible assets, net	2,799	3,339
Trademarks and other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	1,278	1,278
Accumulated Amortization	(1,234)	(1,002)
Total intangible assets, net	$ 44	$ 276