CONSOLIDATED STATEMENTS OF OPERATIONS (in thousands, except per share amounts) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net Sales	$ 18,717	$ 17,085
Cost of goods sold	9,207	8,447
Gross margin	9,510	8,638
Operating expenses:
Research and development	4,586	5,564
Selling, general and administrative	6,378	7,450
Impairment charge	31	2,358
Provision for business restructuring	1,183	207
Total operating expenses	12,178	15,579
Operating income(loss)	(2,668)	(6,941)
Non-operating income (expense):
Interest income	160	291
Foreign currency transaction gain (loss)	(76)	(106)
Total non-operating income (expense)	84	185
Income (loss) before income taxes	(2,584)	(6,756)
Income tax (expense) benefit	8	327
Net income (loss)	$ (2,576)	$ (6,429)
Basic earnings (loss) per share	$ (0.33)	$ (0.80)
Diluted earnings (loss) per share	$ (0.33)	$ (0.80)
Weighted-average basic shares	7,767	7,995
Weighted-average diluted shares	7,767	7,995