Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues
Product sales	$ 296	$ 795	$ 869	$ 3,335
License fees	60	60	180	180
Commercial collaborations	4		22	80
Contracts and grants				287
Total revenues	360	855	1,071	3,882
Cost of goods sold
Product	773	559	1,792	3,484
Commercial collaborations		(124)		73
Contracts and grants				296
Warranty and inventory reserves	15	97	490	155
Total cost of goods sold	788	532	2,282	4,008
Gross (loss) profit	(428)	323	(1,211)	(126)
Operating expenses
Research and development	1,423	1,594	5,046	4,933
Sales and marketing	499	834	2,344	2,798
General and administrative	1,837	2,730	5,010	6,107
Depreciation and amortization	252	259	771	1,013
Loss on disposal of assets		2		18
Total operating expenses	4,011	5,419	13,171	14,869
Loss from operations	(4,439)	(5,096)	(14,382)	(14,995)
Other (expense) income
Interest income (expense), net	37	(97)	67	(155)
Change in market value of warrants	(267)	(676)	(88)	346
Loss on foreign exchange	(2)	(4)	(2)	(5)
Total other (expense) income, net	(232)	(777)	(23)	186
Net loss	$ (4,671)	$ (5,873)	$ (14,405)	$ (14,809)
Loss per common share - basic and diluted (in Dollars per share)	$ (0.07)	$ (0.10)	$ (0.21)	$ (0.38)
Weighted average shares - basic and diluted (in Shares)	69,537,911	60,222,433	69,537,911	39,286,178