Balance Sheet Components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Total property and equipment	$ 27,776	$ 22,136
Accumulated depreciation and amortization	(17,456)	(16,296)
Property and equipment, net	10,320	5,840	[1]
Machinery and Equipment
Property Plant And Equipment [Line Items]
Total property and equipment	12,839	12,611
Computer Equipment and Software
Property Plant And Equipment [Line Items]
Total property and equipment	3,715	2,923
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Total property and equipment	1,263	714
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property and equipment	4,407	4,388
Finance lease right of use assets
Property Plant And Equipment [Line Items]
Total property and equipment	1,447
Construction in Progress
Property Plant And Equipment [Line Items]
Total property and equipment	$ 4,105	$ 1,500

[1] The consolidated balance sheet as of December 31, 2019 has been derived from the audited consolidated balance sheet included in the Company’s 2019 Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 27, 2020.