Balance Sheet Components - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 1,849	$ 1,849
Accumulated Amortization	(1,572)	(1,449)
Net Carrying Value	277	400
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,658	1,658
Accumulated Amortization	(1,410)	(1,299)
Net Carrying Value	248	359
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	191	191
Accumulated Amortization	(162)	(150)
Net Carrying Value	$ 29	$ 41