Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the nine months ended September 30, 2015 (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	1,226		$	13.23
Granted	400		27.24
Released	(399	)	11.23
Forfeited	(101	)	16.45
Units outstanding, end of period	1,126		18.59		$	24,801

Summary of the Company's Stock Options Activity

The following table summarizes stock option activity for the nine months ended September 30, 2015 (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	1,641		$	5.26
Granted	—		—
Exercised	(504	)	4.96
Expired / terminated	(8	)	8.71
Options outstanding, end of period	1,129		5.36		3.60	$	18,823
Options exercisable, end of period	1,098		5.37		3.61	18,299
Options expected to vest, end of period	25		4.75		3.25	434

Reported Share-Based Compensation

The following table summarizes the composition of stock stock-based compensation for the three and nine months ended September 30, 2015 and 2014 (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Cost of products sold and services delivered	$	118	$	61	$	276	$	149
Sales, general and administrative expenses	1,123		940		2,982		2,598
Research and development expenses	622		436		1,828		1,374
Total stock-based compensation	$	1,863	$	1,437	$	5,086	$	4,121