CONSOLIDATED STATEMENTS OF OPERATIONS (in thousands, except per share amounts) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net Sales	$ 4,613	$ 5,902
Cost of goods sold	2,085	3,045
Gross margin	2,528	2,857
Operating expenses:
Research and development	1,125	1,098
Selling, general and administrative	1,578	1,537
Total operating expenses	2,703	2,635
Operating income (loss)	(175)	222
Non-operating income (expense):
Interest income	12	31
Foreign currency transaction gain (loss)	(4)	(195)
Total non-operating income (expense)	8	(164)
Income (loss) before income taxes	(167)	58
Income tax (expense) benefit	(1)	(9)
Net income (loss)	$ (168)	$ 49
Basic earnings (loss) per share	$ (0.02)	$ 0.01
Diluted earnings (loss) per share	$ (0.02)	$ 0.01
Weighted-average basic shares	7,945	7,863
Weighted-average diluted shares	7,945	8,045