Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Schedule of share repurchase activity

Periods	Total number of shares purchased		Average price paid per share		Total number of shares purchased as part of publicly announced program		Approximate dollar value of shares that may yet be purchased under the program (in thousands)
July 1, 2020 to July 31, 2020		66,168	$	8.01		66,168	$	0
August 1, 2020 to August 31, 2020		—
September 1, 2020 to September 30, 2020		—
Total		66,168

Schedule of inventories

	September 30, 2020		December 31, 2019
	(in thousands)
Raw materials	$	468	$	468
Work-in-process		712		901
Finished goods		321		809
	$	1,501	$	2,178

Schedule of property and equipment

	September 30, 2020			December 31, 2019
	(in thousands)
Machinery, equipment and tooling	$	3,343		$	3,341
Buildings		1,711			1,711
Information systems		835			835
Land and land improvements		594			594
Furniture and fixtures		8			8
Total cost		6,491			6,489
Accumulated depreciation and amortization		(3,967	)		(3,842	)
Property and equipment, net	$	2,524		$	2,647