Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Product revenue	$ 1,219	$ 1,529
Contract revenue	282	201
Development revenue	300	0
Total revenue	1,801	1,730
Cost of product revenue	664	4,175
Cost of contract revenue	137	155
Total cost of revenue	801	4,330
Gross margin	1,000	(2,600)
Research and development expense	2,252	3,940
Sales, marketing, general and administrative expense	2,403	3,288
Gain on disposal of fixed assets	(2)	0
Total operating expenses	4,653	7,228
Loss from operations	(3,653)	(9,828)
Other income (expense)	(1)	25
Net loss	$ (3,654)	$ (9,803)
Net loss per share - basic and diluted	$ (0.14)	$ (0.58)
Weighted-average shares outstanding - basic and diluted	25,240	17,027