Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Stock-Based Compensation

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

	Three Months Ended June 30,				Six Months Ended June 30,
(In thousands)	2015		2014		2015		2014
Research and development	$	232	$	514	$	467	$	1,232
General and administrative	1,590		3,081		3,288		8,420
Stock-based compensation from continuing operations	1,822		3,595		3,755		9,652
Stock-based compensation from discontinued operations	—		4,152		—		11,629
Total stock-based compensation expense	$	1,822	$	7,747	$	3,755	$	21,281

Schedule of assumptions used to estimate the fair value of employee stock options granted

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