Property and Equipment - Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property and equipment [Line Items]
Property and equipment, gross	$ 36,305	$ 35,243
Less accumulated depreciation and amortization	(23,977)	(17,819)
Property and equipment, net	12,328	17,424
Leasehold improvements
Property and equipment [Line Items]
Property and equipment, gross	5,321	4,804
Laboratory and clean room equipment
Property and equipment [Line Items]
Property and equipment, gross	14,894	13,787
Furniture and equipment
Property and equipment [Line Items]
Property and equipment, gross	15,118	15,145
Construction in progress
Property and equipment [Line Items]
Property and equipment, gross	$ 972	$ 1,507

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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