Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2016

Schedule of share-based compensation expense

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
	(In thousands)				(In thousands)
Cost of product revenues	$	140	$	129	$	451	$	401
Research and development		1,123		996		3,646		3,149
Selling and marketing		1,359		1,132		4,234		3,406
General and administrative		2,091		1,671		5,771		5,099
Total	$	4,713	$	3,928	$	14,102	$	12,055

Stock Options

Summary of option activity

	Outstanding Options
	Number of	Weighted-Average
	Shares	Exercise Price
	(In thousands)
Balance at December 31, 2015	3,630	$	23.80
Options granted	716	$	26.98
Options exercised	(344)	$	18.58
Options forfeited	(24)	$	29.42
Options expired	(42)	$	28.70
Balance at September 30, 2016	3,936	$	24.75
Exercisable at September 30, 2016	2,783	$	23.19
Vested and expected to vest at September 30, 2016	3,840	$	24.66

Stock Options | Performance-Based Vesting

Summary of option activity

	Outstanding PV Stock Options
	Number of	Weighted-Average
	Shares	Exercise Price
	(In thousands)
Balance at December 31, 2015	—	$	—
PV stock options granted	76	$	31.12
PV stock options exercised	—	$	—
PV stock options forfeited	—	$	—
PV stock options expired	—	$	—
Balance at September 30, 2016	76	$	31.12
Exercisable at September 30, 2016	—	$	—
Vested and expected to vest at September 30, 2016	72	$	31.12

RSUs

Summary of RSU activity

		Weighted-Average
	Number of	Grant Date Fair
	Shares	Value
	(In thousands)
Balance at December 31, 2015	682	$	30.18
RSUs granted	586	$	27.46
RSUs vested	(301)	$	30.10
RSUs cancelled	(73)	$	29.24
Balance at September 30, 2016	894	$	28.50

RSUs | Performance-Based Vesting

Summary of RSU activity

		Weighted-Average
	Number of	Grant Date Fair
	Shares	Value
	(In thousands)
Balance at December 31, 2015	6	$	27.21
PVRSUs granted	12	$	28.09
PVRSUs vested	(6)	$	27.21
PVRSUs cancelled	—	$	—
Balance at September 30, 2016	12	$	28.09