Consolidated Statements of Operations (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Revenues
Product sales	$ 1,284,000	$ 4,619,000
License fees	240,000	240,000
Commercial collaborations	23,000	80,000
Contracts and grants	11,800,000	287,000
Total revenues	1,547,000	5,226,000
Cost of goods sold
Product	2,667,000	5,149,000
Commercial collaborations		73,000
Contracts and grants		296,000
Warranty and inventory reserves	205,000	279,000
Total cost of goods sold	2,872,000	5,797,000
Gross loss	(1,325,000)	(571,000)
Operating expenses
Research and development	6,423,000	6,960,000
Sales and marketing	2,864,000	3,603,000
General and administrative	6,908,000	7,669,000
Depreciation and amortization	1,071,000	1,324,000
Loss on disposal of assets		924,000
Total operating expenses	17,266,000	20,480,000
Loss from operations	(18,591,000)	(21,051,000)
Other (expense) income
Interest income (expense), net	48,000	(156,000)
Change in market value of warrants	564,000	1,274,000
Loss on foreign exchange	(7,000)
Total other income, net	605,000	1,118,000
Net loss	$ (17,986,000)	$ (19,933,000)
Loss per common share - basic and diluted (in Dollars per share)	$ (1.55)	$ (2.55)
Weighted average shares - basic and diluted (in Shares)	11,590,067	7,814,957