Balance Sheet Components - Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Deferred Revenue
Revenue	$ 10,280	$ 10,108
Deferred licensing revenue	3,000
RAD-Hard product
Deferred Revenue
Total amount of consideration to be received	6,500
Revenue	0
Deferred licensing revenue	$ 3,000