Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Total cost	$ 6,491	$ 6,489
Accumulated depreciation and amortization	(3,967)	(3,842)
Property and equipment, net	2,524	2,647
Machinery, equipment and tooling [Member]
Summary Of Significant Accounting Policies [Line Items]
Total cost	3,343	3,341
Buildings [Member]
Summary Of Significant Accounting Policies [Line Items]
Total cost	1,711	1,711
Information systems [Member]
Summary Of Significant Accounting Policies [Line Items]
Total cost	835	835
Land and land improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Total cost	594	594
Furniture and fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Total cost	$ 8	$ 8