Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Stock-Based Compensation

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

	Year Ended December 31,
(In thousands)	2014		2013		2012
Research and development	$	2,781	$	573	$	475
General and administrative		12,980		7,325		7,310
Stock-based compensation from continuing operations		15,761		7,898		7,785
Stock-based compensation from discontinued operations		11,629		17,789		15,998
Total stock-based compensation expense	$	27,390	$	25,687	$	23,783

Schedule of stock-based compensation expense by award type

	Year Ended December 31,
(In thousands)	2014		2013		2012
Stock options	$	4,658	$	4,132	$	3,417
RSUs		4,564		10,174		10,803
RSAs		7,575		9,723		7,602
Performance RSUs		3		61		743
Performance RSAs		10,580		1,061		366
ESPP		10		536		852
Total stock-based compensation expense	$	27,390	$	25,687	$	23,783

Schedule of unrecognized stock-based compensation cost, net of expected forfeitures for awards expected to vest, including performance-contingent RSAs for which the performance milestones were determined to be probable of achievement, and the estimated weighted-average amortization period, using the straight-line attribution method

(In thousands, except amortization period)	Unrecognized Compensation Cost		Weighted- Average Amortization Period (Years)
Stock options	$	3,207		3.2
RSUs		1,814		1.4
RSAs		5,147		3.4
Performance RSAs		619		1.9
Total stock-based compensation expense	$	10,787

Summary of equity award activity under the 2012 plan and prior plans

(In thousands, except per share data)	Number of Shares Subject to Outstanding Options			Weighted- Average Exercise Price of Outstanding Options		Number of Shares Subject to Outstanding RSUs			Weighted- Average Fair Value per Share at Grant		Number of Shares Outstanding Subject to Vesting or Performance Conditions with Vesting			Weighted- Average Fair Value per Share at Grant
Balance at December 31, 2013		4,824		$	25.30		1,115		$	21.53		2,365		$	23.66
Granted		885			30.42		157			23.08		684			23.36
Exercised		(1,177	)		14.01		—			—		—			—
Released RSUs/RSAs		—			—		(538	)		18.35		(823	)		23.20
Forfeited		(393	)		27.26		(155	)		22.00		(454	)		15.73
Anti-dilution adjustments		1,283			—		196			—		—			—
Balance at December 31, 2014		5,422			22.46		775			18.53		1,772			25.78

Schedule of weighted-average assumptions used to estimate the fair value of stock options granted and employee stock purchase plan issuances

	Year Ended December 31,
	2014	2013	2012
Employee stock options
Risk-free interest rate	1.6% - 2.1%	0.8% - 2.0%	0.7% - 1.2%
Expected term (in years)	5 - 6	5 - 6	5 - 6
Volatility	52% - 60%	58% - 60%	55% - 60%
Dividend yield	3% - 4%	—	—
Weighted-average estimated fair value of stock options granted	$15.63	$19.96	$11.50
Employee stock purchase plan issuances
Risk-free interest rate	0.1% - 0.5%	0.1% - 0.3%	0.1% - 0.3%
Expected term (in years)	0.5 - 2	0.5 - 2	0.5 - 2
Volatility	43% - 55%	56% - 61%	51% - 64%
Dividend yield	8%	—	—
Weighted-average estimated fair value of stock options granted	$4.49	$16.44	$8.07