Equipment and leasehold improvements consist of the following: (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property plant and equipment,gross	$ 30,567	$ 29,115
Less: Accumulated depreciation and amortization	(21,899)	(21,166)
Property, Plant and Equipment, Net, Total	8,668	7,949
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment,gross	23,339	19,899
Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment,gross	1,014	1,014
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment,gross	126	110
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment,gross	5,157	5,140
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment,gross	$ 931	$ 2,952