Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2016

Equity [Abstract]

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the nine months ended September 30, 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	501		17.84
Released	(321	)	15.72
Forfeited	(106	)	21.61
Units outstanding, end of period	1,213		19.45		$	34,704

Summary of the Company's Stock Options Activity

The following table summarizes stock option activity for the nine months ended September 30, 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	(88	)	4.92
Expired / terminated	—		—
Options outstanding, end of period	1,015		5.41		2.50	$	23,555
Options exercisable, end of period	985		5.43		2.51	22,823
Options expected to vest, end of period	25		4.75		2.23	597

Reported Share-Based Compensation

The following table summarizes the composition of stock stock-based compensation for the three and nine months ended September 30, 2016 and 2015 (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Cost of products sold and services delivered	$	77	$	118	$	247	$	276
Sales, general and administrative expenses	1,348		1,123		4,197		2,982
Research and development expenses	791		622		2,298		1,828
Total stock-based compensation	$	2,216	$	1,863	$	6,742	$	5,086