Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2019

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)
April 1, 2019 to April 30, 2019		9,282	$	7.81		9,282	$	2,830
May 1, 2019 to May 31, 2019		35,350		7.94		35,350		2,549
June 1, 2019 to June 30, 2019		14,218		8.13		14,218		2,433
Total		58,850

Summary of inventories

	June 30, 2019		December 31, 2018
	(in thousands)
Raw materials	$	468	$	468
Work-in-process		1,015		1,322
Finished goods		458		340
	$	1,941	$	2,130

Summary of property and equipment

	June 30, 2019			December 31, 2018
	(in thousands)
Machinery, equipment and tooling	$	3,340		$	3,293
Buildings		1,711			1,686
Information systems		820			819
Land and land improvements		594			594
Furniture and fixtures		8			8
Total cost		6,473			6,400
Accumulated depreciation and amortization		(3,757	)		(3,672	)
Property and equipment, net	$	2,716		$	2,728