Balance Sheets Components - Schedule of Intangible Assets Net (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 16,063	$ 15,040
Accumulated amortization	(13,505)	(12,971)
Intangible assets, net	2,558	2,069
Internal use software
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	9,405	9,377
Purchased intangibles
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 6,658	$ 5,663