Consolidated Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Product revenue	$ 1,525	$ 1,080	$ 3,315	$ 3,465
Contract revenue	314	221	798	592
Total revenue	1,839	1,301	4,113	4,057
Cost of product revenue	2,483	4,059	7,708	8,555
Cost of contract revenue	237	53	931	202
Total cost of revenue	2,720	4,112	8,639	8,757
Gross margin	(881)	(2,811)	(4,526)	(4,700)
Research and development expense	3,641	5,920	11,446	16,961
Sales, marketing, general and administrative expense	3,306	3,555	10,182	11,260
Gain on disposal of fixed assets	(4)	0	(11)	0
Total operating expenses	6,943	9,475	21,617	28,221
Loss from operations	(7,824)	(12,286)	(26,143)	(32,921)
Interest income	9	15	36	94
Interest expense	(9)	(15)	(34)	(48)
Gain on derivative instruments, net	0	446	0	875
Other income (expense)	34	(10)	139	(40)
Net loss	$ (7,790)	$ (11,850)	$ (26,002)	$ (32,040)
Net loss per share - basic and diluted	$ (0.07)	$ (0.13)	$ (0.25)	$ (0.36)
Weighted-average shares outstanding - basic and diluted	109,238	89,376	106,061	88,948