CONSOLIDATED STATEMENTS OF OPERATIONS (in thousands, except per share amounts) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net Sales	$ 22,017	$ 21,924
Cost of goods sold	10,473	10,099
Gross margin	11,544	11,825
Operating expenses:
Research and development	4,701	4,708
Selling, general and administrative	5,850	5,997
Provision for business restructuring	0	13
Total operating expenses	10,551	10,718
Operating income	993	1,107
Non-operating income (expense):
Interest income	105	159
Foreign currency transaction gain (loss)	(176)	(160)
Total non-operating income (expense)	(71)	(1)
Income before income taxes	922	1,106
Income tax (expense) benefit	5	(7)
Net income	$ 927	$ 1,099
Basic earnings per share	$ 0.12	$ 0.14
Diluted earnings per share	$ 0.12	$ 0.14
Weighted-average basic shares	7,907	7,826
Weighted-average diluted shares	8,054	7,948