Property and Equipment, net (Details) - USD ($)	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross	$ 12,502,000		$ 11,130,000
Less accumulated depreciation and amortization	(5,870,000)		(5,359,000)
Total property and equipment, net	6,632,000		5,771,000
Depreciation expense	541,000	$ 397,000
Net book value of property and equipment under capital leases	83,000		94,000
Laboratory equipment
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross	10,409,000		9,355,000
Furniture and fixtures
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross	242,000		225,000
Computer hardware and software
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross	798,000		785,000
Leasehold improvements
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross	702,000		629,000
Construction in process
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Gross	$ 351,000		$ 136,000

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 after depreciation of leased long-lived, physical assets used to produce goods and services and not intended for resale meeting the criteria for capitalization, classified as other.

+ References

No definition available.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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