Stock-based Compensation Expense (Tables)

9 Months Ended

Sep. 30, 2015

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

Stock-based compensation expense by line item

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(in thousands)
Stock-based compensation expense by type of award:
Stock options	$	39,074		$	26,291		$	105,720		$	78,403
Restricted stock and restricted stock units	26,203			18,418			78,274			51,431
ESPP share issuances	1,738			1,883			5,703			6,231
Less stock-based compensation expense capitalized to inventories	(1,281		)	(456		)	(3,318		)	(905		)
Total stock-based compensation included in costs and expenses	$	65,734		$	46,136		$	186,379		$	135,160
Stock-based compensation expense by line item:
Research and development expenses	$	44,701		$	31,131		$	124,550		$	91,284
Sales, general and administrative expenses	21,033			15,005			61,829			43,876
Total stock-based compensation included in costs and expenses	$	65,734		$	46,136		$	186,379		$	135,160

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 September 30, 2015
	Unrecognized Expense, Net of Estimated Forfeitures		Weighted-average Recognition Period
	(in thousands)		(in years)
Type of award:
Stock options	$	197,031	2.30
Restricted stock and restricted stock units	$	190,786	2.73
ESPP share issuances	$	1,885	0.44

Stock options outstanding and exercisable

The following table summarizes information about stock options outstanding and exercisable at September 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)
$18.93–$20.00	138	2.35	$	18.93	138	$	18.93
$20.01–$40.00	2,499	3.81	$	34.56	2,284	$	34.36
$40.01–$60.00	2,593	6.80	$	48.27	1,458	$	49.52
$60.01–$80.00	1,567	8.31	$	75.94	551	$	74.95
$80.01–$100.00	1,932	8.28	$	90.27	638	$	87.16
$100.01–$120.00	1,791	9.32	$	109.24	201	$	109.22
$120.01–$134.69	1,505	9.78	$	131.21	168	$	127.52
Total	12,025	7.31	$	74.90	5,438	$	53.98