Stockholders' Equity and Warrants (Tables)

3 Months Ended

Mar. 31, 2012

Changes in Stockholders' Equity

The changes in stockholders’ equity for the three-month period ended March 31, 2012 were as follows:

	Common Stock				Additional Paid-in Capital			Accumulated Other Comprehensive Loss			Accumulated Deficit			Total
$ in thousands	Shares		Amount
Balance, January 1, 2012		157,608,702	$	158	$	776,946		$	—		$	(556,963	)	$	220,141
Issuance of common stock pursuant to warrant exercises		5,805,843		5		87,040									87,045
Issuance of common stock pursuant to ARIAD stock plans		2,059,563		2		3,375									3,377
Stock-based compensation						4,913									4,913
Payment of tax withholding obligations related to stock-based compensation						(2,302	)								(2,302	)
Net unrealized losses on marketable securities									(15	)					(15	)
Net loss												(55,894	)		(55,894	)
Balance, March 31, 2012		165,474,108	$	165	$	869,972		$	(15	)	$	(612,857	)	$	257,265