Balance Sheet Components - Acquired Intangible Assets, Net (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	$ 6,730	$ 6,730	$ 6,730
Less: accumulated amortization	(6,099)	(6,099)	(5,523)
Acquired intangible assets, net	631	631	1,207
Amortization of acquired intangible assets including backlog	271
Cost of revenue
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets including backlog	218
Selling, general and administrative
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets including backlog	53
Developed technology
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	5,050	$ 5,050	5,050
Developed technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives		3 years
Developed technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives		5 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	1,270	$ 1,270	1,270
Backlog and tradename
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	$ 410	$ 410	$ 410