Consolidated Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Product revenue	$ 904	$ 2,015	$ 1,790	$ 2,385
Contract revenue	251	73	484	371
Total revenue	1,155	2,088	2,274	2,756
Cost of product revenue	2,985	3,337	5,225	4,496
Cost of contract revenue	395	21	694	149
Total cost of revenue	3,380	3,358	5,919	4,645
Gross margin	(2,225)	(1,270)	(3,645)	(1,889)
Research and development expense	3,478	6,043	7,805	11,041
Sales, marketing, general and administrative expense	3,577	3,817	6,876	7,705
Gain on disposal of fixed assets	0	0	(7)	0
Total operating expenses	7,055	9,860	14,674	18,746
Loss from operations	(9,280)	(11,130)	(18,319)	(20,635)
Interest income	12	50	27	79
Interest expense	(12)	(16)	(25)	(33)
Gain on derivative instruments, net	0	34	0	429
Other income (expense)	105	(11)	105	(30)
Net loss	$ (9,175)	$ (11,073)	$ (18,212)	$ (20,190)
Net loss per share - basic and diluted	$ (0.09)	$ (0.12)	$ (0.17)	$ (0.23)
Weighted-average shares outstanding - basic and diluted	106,176	88,676	104,446	88,730