Stock-based Compensation Expense (Tables)

9 Months Ended

Sep. 30, 2014

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, 2014 and 2013, 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,
	2014			2013			2014			2013
	(in thousands)
Stock-based compensation expense by type of award:
Stock options	$	26,291		$	18,899		$	78,403		$	68,285
Restricted stock and restricted stock units	18,418			10,998			51,431			30,108
ESPP share issuances	1,883			1,504			6,231			6,077
Less stock-based compensation expense capitalized to inventories	(456		)	(204		)	(905		)	(885		)
Total stock-based compensation expense included in costs and expenses	$	46,136		$	31,197		$	135,160		$	103,585
Stock-based compensation expense by line item:
Research and development expenses	$	31,131		$	19,155		$	91,284		$	64,100
Sales, general and administrative expenses	15,005			12,042			43,876			39,485
Total stock-based compensation expense included in costs and expenses	$	46,136		$	31,197		$	135,160		$	103,585

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, 2014
	Unrecognized Expense, Net of Estimated Forfeitures		Weighted-average Recognition Period
	(in thousands)		(in years)
Type of award:
Stock options	$	180,746	2.28
Restricted stock and restricted stock units	$	116,900	2.27
ESPP share issuances	$	1,978	0.43

Stock options outstanding and exercisable

The following table summarizes information about stock options outstanding and exercisable at September 30, 2014:

	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)
$10.41–$20.00	297	1.97	$16.16	297	$16.16
$20.01–$30.00	633	4.64	$29.32	482	$29.13
$30.01–$40.00	3,458	4.75	$36.24	2,627	$35.71
$40.01–$50.00	2,934	8.11	$46.32	661	$46.67
$50.01–$60.00	1,093	7.07	$54.27	655	$54.80
$60.01–$70.00	126	8.92	$65.78	28	$64.76
$70.01–$80.00	1,998	9.36	$76.71	360	$74.59
$80.01–$90.00	1,231	8.81	$83.09	369	$82.53
$90.01–$96.87	1,327	9.80	$96.73	—	$—
Total	13,097	7.26	$56.20	5,479	$43.53