Stock-based Compensation Expense (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-based compensation expense by line item

During the three and six months ended June 30, 2015 and 2014, the Company recognized the following stock-based compensation expense included in loss from continuing operations:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
	(in thousands)
Stock-based compensation expense by type of award:
Stock options	$	37,687		$	26,985		$	66,646		$	52,112
Restricted stock and restricted stock units	24,902			14,020			52,071			33,013
ESPP share issuances	1,825			1,681			3,965			4,348
Less stock-based compensation expense capitalized to inventories	(1,153		)	(242		)	(2,037		)	(449		)
Total stock-based compensation included in costs and expenses	$	63,261		$	42,444		$	120,645		$	89,024
Stock-based compensation expense by line item:
Research and development expenses	$	41,632		$	27,253		$	79,849		$	60,153
Sales, general and administrative expenses	21,629			15,191			40,796			28,871
Total stock-based compensation included in costs and expenses	$	63,261		$	42,444		$	120,645		$	89,024

Unrecognized stock-based compensation expense, net of estimated forfeitures

The following table sets forth the Company's unrecognized stock-based compensation expense, net of estimated forfeitures, by type of award and the weighted-average period over which that expense is expected to be recognized:

	As of June 30, 2015
	Unrecognized Expense, Net of Estimated Forfeitures		Weighted-average Recognition Period
	(in thousands)		(in years)
Type of award:
Stock options	$	169,671	2.22
Restricted stock and restricted stock units	$	175,285	2.73
ESPP share issuances	$	3,953	0.59

Stock options outstanding and exercisable

The following table summarizes information about stock options outstanding and exercisable at June 30, 2015:

	Options Outstanding				Options Exercisable
Range of Exercise Prices	Number Outstanding	Weighted-average Remaining Contractual Life	Weighted-average Exercise Price		Number Exercisable	Weighted-average Exercise Price
	(in thousands)	(in years)	(per share)		(in thousands)	(per share)
$17.16–$20.00	147	2.52	$	18.87	147	$	18.87
$20.01–$40.00	2,888	4.04	$	34.82	2,534	$	34.60
$40.01–$60.00	3,015	7.12	$	48.32	1,534	$	49.67
$60.01–$80.00	1,705	8.60	$	75.99	539	$	74.93
$80.01–$100.00	2,108	8.57	$	90.22	621	$	86.72
$100.01–$120.00	1,868	9.58	$	109.24	113	$	109.25
$120.01–$127.54	202	9.92	$	127.31	165	$	127.54
Total	11,933	7.22	$	66.92	5,653	$	52.06