Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Schedule of inventories

	September 30, 2021		December 31, 2020
	(in thousands)
Raw materials	$	468	$	468
Work-in-process		300		614
Finished goods		403		400
	$	1,171	$	1,482

Schedule of property and equipment

	September 30, 2021			December 31, 2020
	(in thousands)
Machinery, equipment and tooling	$	3,296		$	3,296
Buildings		1,711			1,711
Information systems		818			818
Land and land improvements		594			594
Furniture and fixtures		8			8
Total cost		6,427			6,427
Accumulated depreciation and amortization		(4,094	)		(3,945	)
Property and equipment, net	$	2,333		$	2,482