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Condensed Consolidated Statements of Operations (unaudited) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Revenue:
Revenue from licensing agreements and grants	$ 41,265		$ 123,693		$ 162,614		$ 409,092
Revenue from product sales	182,321		129,826		516,536		318,831
Total revenue	223,586		253,519		679,150		727,923
Cost of product sales	60,501		35,914		167,390		104,538
Gross profit	163,085		217,605		511,760		623,385
Operating expenses:
Research and development	4,524,334		5,200,612		15,103,845		15,096,354
Selling, general and administrative	1,733,229		2,017,872		5,912,220		6,889,292
Wind-down expenses	68,694				258,749		291,168
Total operating expenses	6,326,257		7,218,484		21,274,814		22,276,814
Loss from operations	(6,163,172)		(7,000,879)		(20,763,054)		(21,653,429)
Other income (expense):
Realized gain on sale of marketable securities					83,750
Change in fair value of warrant liability	1,697,194		1,227,585		6,500,377		5,184,304
Interest income	3,514		10,911		11,332		24,814
Interest expense	(16,585)		(22,221)		(56,585)		(72,775)
Other income (expense)	144,697		232,348		107,400		230,408
Total other income (expense), net	1,828,820		1,448,623		6,646,274		5,366,751
Net loss	$ (4,334,352)		$ (5,552,256)		$ (14,116,780)		$ (16,286,678)
Basic and diluted net loss per share*	$ (0.31)	[1]	$ (0.44)	[1]	$ (1.02)	[1]	$ (1.33)	[1]
Shares used to compute basic and diluted loss per share*	14,009,341	[1]	12,709,172	[1]	13,831,749	[1]	12,201,532	[1]
[1] Adjusted for the 1-for-10 reverse stock split as discussed in Note 1

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