Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

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

Summary of option activity

The following is a summary of option activity (in thousands, except per share data):

				Weighted				Weighted
		Weighted		Average				Average
		Average		Share Price		Weighted		Remaining	Aggregate
	Number of	Exercise		onDate of		Average		Contractual	Intrinsic
	shares	Price		Exercise		Fair Value		Life	Value
	(in thousands, except price data)
Outstanding, January 1, 2018	536	$	10.04			$	5.19		$	14,888
Exercised	(122)		9.79	$	36.18		5.00			3,223
Forfeited	(127)		9.92				5.10			1,886
Outstanding, September 30, 2018	287	$	10.19			$	5.31	4.86	$	4,153
Exercisable, September 30, 2018	287	$	10.19					4.86	$	4,153
Vested and expected to vest	287	$	10.19					4.86	$	4,153

Summary of RSU/RSA activity

The following is a summary of RSU/RSA activity (in thousands, except per share data):

		Weighted
		AverageShare		Weighted		Aggregate
	Number of	Price onDate		Average Fair		Intrinsic
	shares	ofRelease		Value		Value
	(in thousands, except price data)
Outstanding at January 1, 2018	707			$	29.23	$	26,732
Granted	523				33.83		17,704
Released	(279)	$	37.66		28.92		10,519
Cancelled/Forfeited	(34)				32.58		844
Outstanding, September 30, 2018	917			$	31.82	$	22,605
Vested and expected to vest	917					$	22,605

Schedule of employee stock-based compensation expenses

Employee share-based compensation expenses recognized for the periods indicated (in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Share-based compensation - by expense type
Cost of goods sold	$	205	$	124	$	593	$	336
Research and development		624		400		1,876		1,106
Sales and marketing		181		118		669		367
General and administrative		1,884		1,439		5,224		4,040
Total share-based compensation expense	$	2,894	$	2,081	$	8,362	$	5,849

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Share-based compensation - by award type
Employee stock options	$	12	$	263	$	12	$	810
Restricted stock units		2,882		1,818		8,350		5,039
Total share-based compensation expense	$	2,894	$	2,081	$	8,362	$	5,849