Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Income Statement [Abstract]
Net Sales	$ 3,679	$ 7,043
Cost of goods sold	1,737	2,879
Gross margin	1,942	4,164
Operating expenses:
Research and development	1,392	1,352
Selling, general and administrative	2,250	2,172
Total operating expenses	3,642	3,524
Operating income	(1,700)	640
Non-operating income (expense):
Interest income	33	13
Foreign currency transaction gain (loss)	9	(35)
Total non-operating income (loss)	42	(22)
Income (loss) before income taxes	(1,658)	618
Income tax (expense) benefit	(19)	(86)
Net income (loss)	$ (1,677)	$ 532
Basic earnings per share	$ (0.19)	$ 0.06
Diluted earnings per share	$ (0.19)	$ 0.06
Weighted-average basic shares	8,765	9,031
Weighted-average diluted shares	8,765	9,234