Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

Stock-Based Compensation

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

	Three months ended March 31,
(In thousands)	2015		2014
Research and development	$	235	$	718
General and administrative	1,698		5,340
Stock-based compensation from continuing operations	1,933		6,058
Stock-based compensation from discontinued operations	—		7,477
Total stock-based compensation expense	$	1,933	$	13,535

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

Risk-free interest rate	1.8% - 2.0%
Expected term (in years)	6
Volatility	60%
Dividend yield	—
Weighted-average estimated fair value of stock options granted	$	21.29