Balance Sheets Components - Schedule of Intangible Assets Net (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Gross Assets	$ 16,501	$ 15,040
Accumulated Amortization	(14,026)	(12,971)
Net Assets	2,475	2,069
Internal use software
Finite Lived Intangible Assets [Line Items]
Gross Assets	9,434	9,377
Accumulated Amortization	(8,504)	(8,312)
Net Assets	930	1,065
Purchased intangibles
Finite Lived Intangible Assets [Line Items]
Gross Assets	7,067	5,663
Accumulated Amortization	(5,522)	(4,659)
Net Assets	$ 1,545	$ 1,004