Stock-based Compensation Expense (Tables)

3 Months Ended

Mar. 31, 2016

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

Stock-based compensation expense by line item

During the three months ended March 31, 2016 and 2015, the Company recognized the following stock-based compensation expense included in loss from continuing operations:

	Three Months Ended March 31,
	2016			2015
Stock-based compensation expense by type of award:
Stock options	$	26,260		$	28,959
Restricted stock and restricted stock units	27,533			27,169
ESPP share issuances	2,524			2,140
Less stock-based compensation expense capitalized to inventories	(845		)	(884		)
Total stock-based compensation included in costs and expenses	$	55,472		$	57,384
Stock-based compensation expense by line item:
Research and development expenses	$	34,448		$	38,217
Sales, general and administrative expenses	21,024			19,167
Total stock-based compensation included in costs and expenses	$	55,472		$	57,384

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 March 31, 2016
	Unrecognized Expense, Net of Estimated Forfeitures		Weighted-average Recognition Period
	(in thousands)		(in years)
Type of award:
Stock options	$	206,783	2.83
Restricted stock and restricted stock units	$	223,184	2.78
ESPP share issuances	$	3,143	0.49

Stock options outstanding and exercisable

The following table summarizes information about stock options outstanding and exercisable at March 31, 2016:

	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	1.85	$	18.93	138	$	18.93
$20.01–$40.00	2,124	3.56	$	34.30	2,119	$	34.29
$40.01–$60.00	2,210	6.33	$	48.09	1,590	$	48.77
$60.01–$80.00	1,396	7.83	$	75.92	654	$	75.31
$80.01–$100.00	3,550	8.81	$	90.65	815	$	88.04
$100.01–$120.00	1,677	8.80	$	109.32	402	$	109.26
$120.01–$134.69	1,524	9.28	$	130.63	339	$	129.57
Total	12,619	7.36	$	78.61	6,057	$	59.71