CONSOLIDATED STATEMENTS OF OPERATIONS (in thousands, except per share amounts) (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Net Sales	$ 4,759	$ 3,679
Cost of goods sold	2,218	1,737
Gross margin	2,541	1,942
Operating expenses:
Research and development	1,205	1,392
Selling, general and administrative	1,806	2,250
Total operating expenses	3,011	3,642
Operating income(loss)	(470)	(1,700)
Non-operating income (expense):
Interest income	18	33
Foreign currency transaction gain (loss)	(3)	9
Total non-operating income (expense)	15	42
Income (loss) before income taxes	(455)	(1,658)
Income tax (expense) benefit	(4)	(19)
Net income (loss)	$ (459)	$ (1,677)
Basic earnings (loss) per share	$ (0.06)	$ (0.19)
Diluted earnings (loss) per share	$ (0.06)	$ (0.19)
Weighted-average basic shares	7,749	8,765
Weighted-average diluted shares	7,749	8,765