CONSOLIDATED STATEMENTS OF OPERATIONS (in thousands, except per share amounts) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net Sales	$ 7,224	$ 4,613
Cost of goods sold	3,057	2,085
Gross margin	4,167	2,528
Operating expenses:
Research and development	1,545	1,125
Selling, general and administrative	1,818	1,578
Total operating expenses	3,363	2,703
Operating income (loss)	804	(175)
Non-operating income (expense):
Interest income	8	12
Gain on sale of assets	211	0
Foreign currency transaction gain (loss)	(32)	(4)
Total non-operating income (expense)	187	8
Income (loss) before income taxes	991	(167)
Income tax (expense)	(12)	(1)
Net income (loss)	$ 979	$ (168)
Basic earnings (loss) per share	$ 0.12	$ (0.02)
Diluted earnings (loss) per share	$ 0.12	$ (0.02)
Weighted-average basic shares	8,031	7,945
Weighted-average diluted shares	8,327	7,945