Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2016

Equity [Abstract]

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the three months ended March 31, 2016 (number of units and aggregate intrinsic value in thousands):

	Number of Units		Weighted Average Grant-Date Fair Value		Aggregate Intrinsic Value
Units outstanding, beginning of year	1,139		$	19.30
Granted	362		15.55
Released	(176	)	15.57
Forfeited	(54	)	21.08
Units outstanding, end of period	1,271		18.67		$	24,959

Summary of the Company's Stock Options Activity

The following table summarizes stock option activity for the three months ended March 31, 2016 (number of units and aggregate intrinsic value in thousands):

	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value
Options outstanding, beginning of year	1,103		$	5.37
Granted	—		—
Exercised	(6	)	5.17
Expired / terminated	—		—
Options outstanding, end of period	1,097		5.37		3.08	$	15,640
Options exercisable, end of period	1,066		5.39		3.09	15,182
Options expected to vest, end of period	25		4.75		2.73	372

Reported Share-Based Compensation

The following table summarizes the composition of stock stock-based compensation for the three and three months ended March 31, 2016 and 2015 (in thousands):

	Three Months Ended March 31,
	2016		2015
Cost of products sold and services delivered	$	100	$	70
Sales, general and administrative expenses	1,390		934
Research and development expenses	730		540
Total stock-based compensation	$	2,220	$	1,544