Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Summary of inventories

	September 30, 2019		December 31, 2018
	(in thousands)
Raw materials	$	468	$	468
Work-in-process		917		1,322
Finished goods		413		340
	$	1,798	$	2,130

Summary of property and equipment

	September 30, 2019			December 31, 2018
	(in thousands)
Machinery, equipment and tooling	$	3,340		$	3,293
Buildings		1,711			1,686
Information systems		835			819
Land and land improvements		594			594
Furniture and fixtures		8			8
Total cost		6,488			6,400
Accumulated depreciation and amortization		(3,799	)		(3,672	)
Property and equipment, net	$	2,689		$	2,728