2. Inventories, net (Tables)

12 Months Ended

Dec. 31, 2016

Inventories Net Tables

Schedule of components of inventory

	December 31,
	2016		2015
Finished goods	$	3,216	$	4,029
Work in process		6,612		8,497
Raw materials		4,171		3,756
	$	13,999	$	16,282

Schedule of changes in allowance for obsolete or slow moving inventory

	Years Ended December 31,
	2016			2015
Balance, beginning of year	$	1,685		$	1,703
Charged to cost of sales		180			54
Disposal of inventory		(258	)		(72	)
Balance, end of year	$	1,607		$	1,685