Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

Stock-Based Compensation

Schedule of allocation of stock-based compensation expense included in the consolidated statements of operations

	Three Months Ended June 30,				Six Months Ended June 30,
(In thousands)	2014		2013		2014		2013
Research and development	$	514	$	198	$	1,232	$	307
General and administrative	3,081		1,970		8,420		3,595
Stock-based compensation expense from continuing operations	3,595		2,168		9,652		3,902
Stock-based compensation from discontinued operations	4,152		4,994		11,629		9,355
Total stock-based compensation expense	$	7,747	$	7,162	$	21,281	$	13,257

Schedule of weighted-average assumptions used to estimate the fair value of stock options granted

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Employee stock options
Risk-free interest rate	1.6%-2.1		%	0.8%-1.3		%	1.6%-2.1		%	0.8%-1.3		%
Expected term (in years)	5-6			5-6			5-6			5-6
Volatility	52%-60		%	59%-60		%	52%-60		%	58%-60		%
Dividend yield	0%-0.4		%	—		%	0%-0.4		%	—		%
Weighted-average estimated fair value of stock options granted	$	15.72		$	17.64		$	17.43		$	15.43