Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2013

Equity [Abstract]

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the years ended December 31, 2013, 2012 and 2011:

	2013					2012					2011
				Weighted					Weighted				Weighted
	Number			Average		Number			Average		Number		Average
	of			Grant-Date		of			Grant-Date		of		Grant-Date
	Units			Fair Value		Units			Fair Value		Units		Fair Value
Units outstanding, beginning of year		582,212		$	5.42		1,096		$	4.76		50	$	4.24
Granted		1,054,293			10.72		713,148			5.40		1,046		4.78
Released		(257,693	)		5.44		(97,007	)		5.30		—
Forfeited		(99,689	)		6.86		(35,025	)		5.29		—
Units outstanding, end of year		1,279,123			9.67		582,212			5.42		1,096		4.76
Aggregate intrinsic value at year end	$	20,312,473

Summary of the Company's Stock Options Activity

The following table summarizes stock option activity for the years ended December 31, 2013, 2012 and 2011:

	2013					2012					2011
				Weighted					Weighted					Weighted
	Number			Average		Number			Average		Number			Average
	of			Exercise		of			Exercise		of			Exercise
	Options			Price		Options			Price		Options			Price
Options outstanding, beginning of year		6,321,076		$	6.05		7,576,493		$	5.75		7,507,236		$	5.71
Granted		—					—					1,018,182			4.65
Exercised		(2,671,058	)		5.75		(784,383	)		2.46		(539,923	)		2.64
Expired / terminated		(284,326	)		7.83		(471,034	)		7.15		(409,002	)		6.38
Options outstanding, end of year		3,365,692			6.15		6,321,076			6.05		7,576,493			5.75
Options exercisable, end of year		3,217,146			6.22		5,278,243			6.31		6,432,667			6.02
Options expected to vest, end of year		103,362			4.54

Summary of Stock Options Outstanding and Exercisable

The following table summarizes information about stock options outstanding and exercisable as of December 31, 2013:

	Options Outstanding						Options Exercisable
					Weighted						Weighted
			Weighted		Average				Weighted		Average
	Number of		Average		Remaining		Number of		Average		Remaining
Range of	Options		Exercise		Contractual		Options		Exercise		Contractual
Exercise Price	Outstanding		Price		Life (Years)		Exercisable		Price		Life (Years)
$3.53 - $5.00		1,886,679	$	4.62		5.9		1,739,833	$	4.63		5.8
$5.01 - $7.00		528,221		5.60		5.2		526,521		5.60		5.1
$7.01 - $10.00		649,381		7.72		3.0		649,381		7.72		3.0
$10.01 - $15.00		194,763		10.31		3.4		194,763		10.31		3.4
$15.01 - $29.83		106,648		18.69		0.4		106,648		18.69		0.4
$3.53 - $29.83		3,365,692		6.15		4.9		3,217,146		6.22		4.8

Reported Share-Based Compensation

The Company accounts for stock-based compensation using the fair-value method. Reported stock-based compensation was classified as follows for the years ended December 31 (in thousands):

	2013		2012		2011
Cost of products sold	$	175	$	172	$	121
Sales, general and administrative expenses		3,158		2,647		2,291
Research and development expenses		1,007		603		626
Total stock-based compensation	$	4,340	$	3,422	$	3,038