Property, Plant and Equipment, net (Details) - Property, plant and equipment - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 3,062,000	$ 2,907,000
Less accumulated depreciation	687,000	623,000
Net property, plant and equipment	2,375,000	2,284,000
Machinery Fixture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	3,039,000	2,884,000
Leaseholds and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 23,000	$ 23,000