Financial Information By Quarter

12 Months Ended

Dec. 31, 2011

Financial Information By Quarter [Abstract]

Financial Information By Quarter

14. FINANCIAL INFORMATION BY QUARTER (UNAUDITED)

	2011 for Quarter Ended
	December 31			September 30			June 30			March 31
	(in thousands)
Revenues from license fees, grants and research contracts	$	13,585		$	7,524		$	11,585		$	14,296
Operating expenses:
Research and development		18,701			15,610			17,750			14,801
General and administrative		3,884			3,185			3,960			5,026
Operating loss		(9,000	)		(11,271	)		(10,125	)		(5,531	)
Other income (loss):
Interest (expense) income, and other, net		147			199			151			90
Gain (loss) on change in warrant valuation		7,443			7,052			11,253			7,274
Net income (loss)	$	(1,410	)	$	(4,020	)	$	1,279		$	1,833
Net income (loss) per share—basic	$	(0.01	)	$	(0.03	)	$	0.01		$	0.02
Net income (loss) per share—diluted	$	(0.01	)	$	(0.03	)	$	0.01		$	0.02
Shares used in per share calculations—basic		135,743			135,738			134,090			112,482
Shares used in per share calculations—diluted		135,743			135,738			138,916			121,285
	2010 for Quarter Ended
	December 31			September 30			June 30			March 31
	(in thousands)
Revenues from license fees, grants and research contracts	$	15,516		$	8,702		$	3,997		$	1,205
Operating expenses:
Research and development		13,886			9,059			6,931			6,096
General and administrative		3,365			3,440			4,733			2,844
Operating loss		(1,735	)		(3,797	)		(7,667	)		(7,735	)
Other income (loss):
Interest (expense) income, and other, net		84			82			51			42
Gain (loss) on change in warrant valuation		(5,993	)		(3,578	)		(9,040	)		7,109
Net income (loss)	$	(7,644	)	$	(7,293	)	$	(16,656	)	$	(584	)
Net income (loss) per share—basic	$	(0.07	)	$	(0.07	)	$	(0.15	)	$	(0.01	)
Net income (loss) per share—diluted	$	(0.07	)	$	(0.07	)	$	(0.15	)	$	(0.01	)
Shares used in per share calculations—basic		112,328			111,767			110,383			110,429
Shares used in per share calculations—diluted		112,328			111,767			110,383			110,429