CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Net Sales	$ 17,085	$ 26,666
Cost of goods sold	8,447	11,431
Gross margin	8,638	15,235
Operating expenses:
Research and development	5,564	5,470
Selling, general and administrative	7,450	8,304
Impairment charge	2,358	0
Provision for business restructuring	207	0
Total operating expenses	15,579	13,774
Operating income(loss)	(6,941)	1,461
Non-operating income (expense):
Interest income	291	97
Interest expense	0	(14)
Foreign currency transaction gain (loss)	(106)	(248)
Total non-operating income (expense)	185	(165)
Income (loss) before income taxes	(6,756)	1,296
Income tax (expense) benefit	327	(233)
Net income (loss)	$ (6,429)	$ 1,063
Basic earnings (loss) per share	$ (0.80)	$ 0.12
Diluted earnings (loss) per share	$ (0.80)	$ 0.11
Weighted-average basic shares	7,995	9,181
Weighted-average diluted shares	7,995	9,320