CONSOLIDATED STATEMENTS OF OPERATIONS (in thousands, except per share amounts) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Net Sales	$ 6,159	$ 6,213	$ 17,019	$ 16,631
Cost of goods sold	2,990	2,822	8,270	7,723
Gross margin	3,169	3,391	8,749	8,908
Operating expenses:
Research and development	1,188	1,217	3,530	3,539
Selling, general and administrative	1,505	1,444	4,457	4,588
Provision for business restructuring	0	0	0	13
Total operating expenses	2,693	2,661	7,987	8,140
Operating income (loss)	476	730	762	768
Non-operating income (expense):
Interest income	30	50	88	122
Foreign currency transaction gain (loss)	(50)	(139)	(237)	(113)
Total non-operating income (expense)	(20)	(89)	(149)	9
Income before income taxes	456	641	613	777
Income tax (expense) benefit	(17)	5	(24)	(27)
Net income	$ 439	$ 646	$ 589	$ 750
Basic earnings per share	$ 0.06	$ 0.08	$ 0.07	$ 0.10
Diluted earnings per share	$ .05	$ 0.08	$ 0.07	$ 0.09
Weighted-average basic shares	7,930	7,846	7,896	7,816
Weighted-average diluted shares	8,042	7,980	8,055	7,922