Quarterly Results of Operations (unaudited)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Quarterly Results of Operations (unaudited)

13. Quarterly Results of Operations (unaudited)

Following is a summary of the quarterly results of operations for the years ended December 31, 2012 and 2011 (in thousands, except per share amounts):

	March 31, 2012			June 30, 2012			September 30, 2012			December 31, 2012
Total revenue	$	282		$	240		$	262		$	223
Operating expenses:
Research and development		786			700			818			1,477
General and administrative		1,083			913			1,013			887
Restructuring and asset impairment		9			9			8			8
Total expenses		1,878			1,622			1,839			2,372
Loss from operations		(1,596	)		(1,382	)		(1,577	)		(2,149	)
Interest expense, net		(366	)		(379	)		(381	)		(394	)
Other income (expense), including extinguishment of debt		2			—			(4	)		—
Loss before income taxes		(1,960	)		(1,761	)		(1,962	)		(2,543	)
Income tax provision		(1	)		—			—			—
Net loss	$	(1,960	)	$	(1,761	)	$	(1,962	)	$	(2,543	)
Basic and diluted net loss per common share	$	(0.01	)	$	(0.01	)	$	(0.01	)	$	(0.01	)
Shares used in computing basic and diluted net loss per common share		197,923			198,406			198,670			201,137
	March 31, 2011			June 30, 2011			September 30, 2011			December 31, 2011
Total revenues	$	182		$	184		$	242		$	183
Operating expenses:
Research and development		1,480			1,584			1,292			651
General and administrative		1,135			1,440			1,020			679
Restructuring and asset impairment		10			10			10			9
Total expenses		2,625			3,034			2,322			1,339
Loss from operations		(2,443	)		(2,850	)		(2,080	)		(1,156	)
Interest expense, net		(5	)		(45	)		(369	)		(365	)
Other income		1			1			—			2
Loss before income taxes		(2,447	)		(2,894	)		(2 ,449	)		(1,519	)
Income tax benefit (provision)		—			—			—			—
Net loss	$	(2,447	)	$	(2,894	)	$	(2,449	)	$	(1,519	)
Basic and diluted net loss per common share	$	(0.01	)	$	(0.02	)	$	(0.01	)	$	(0.01	)
Shares used in computing basic and diluted net loss per common share		170,135			170,731			194,549			197,833