Property and Equipment (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 5,504,000	$ 8,578,000
Accumulated depreciation and amortization	(4,955,000)	(5,310,000)
Net property and equipment	549,000	3,268,000
Machinery And Equipment
Property, Plant and Equipment [Line Items]
Gross property and equipment	3,685,000	3,694,000
Furniture And Fixtures
Property, Plant and Equipment [Line Items]
Gross property and equipment	393,000	385,000
Computer Equipment and Software
Property, Plant and Equipment [Line Items]
Gross property and equipment	1,426,000	2,743,000
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Gross property and equipment	0	577,000
Construction In Progress
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 0	$ 1,179,000

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 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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