Balance Sheets Components - Schedule of Intangible Assets Net (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 14,672	$ 14,815
Accumulated amortization	(12,569)	(10,326)
Intangible assets, net	2,103	4,489
Internal use software
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	9,338	10,022
Purchased intangibles
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 5,334	$ 4,793