Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Product revenue	$ 4,338	$ 3,850	$ 1,016
Contract revenue	1,279	890	2,817
Total revenue	5,617	4,740	3,833
Cost of product revenue	11,640	15,779	2,363
Cost of contract revenue	1,425	443	1,531
Total cost of revenue	13,065	16,222	3,894
Gross margin	(7,448)	(11,482)	(61)
Research and development expense	15,279	21,600	24,577
Sales, marketing, general and administrative expense	13,314	15,252	14,540
Gain on disposal of fixed assets	(11)	0	0
Total operating expenses	28,582	36,852	39,117
Loss from operations	(36,030)	(48,334)	(39,178)
Interest income	47	112	212
Interest expense	(46)	(62)	(68)
Realized loss on sale of investment securities	0	(127)	0
Gain (loss) on derivative instruments, net	0	842	(506)
Other income (expense)	221	109	11
Net loss	$ (35,808)	$ (47,460)	$ (39,529)
Net loss per share - basic and diluted	$ (2.57)	$ (4.17)	$ (4.29)
Weighted-average shares outstanding - basic and diluted	13,919	11,379	9,220