Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 3,756	$ 3,066
Accumulated depreciation	(2,839)	(2,829)
Property and equipment, net	917	237
Laboratory Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	2,243	1,715
Computer Software and Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	617	595
Office Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	301	301
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	317	317
Construction in Progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 278	$ 138

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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