Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Stock Options and Awards

	December 31,
	2013
Common stock shares available for grant		1,811,121
Common stock options outstanding		3,227,167
Restricted stock awards outstanding		44,000
Restricted stock units outstanding		668,056

Schedule of Employee Stock Purchase Plan

The intrinsic value listed below is calculated as the difference between the market value on the date of purchase and the purchase price of the shares.

	Year Ended December 31, 2013
Shares purchased under ESPP		36,921
Average price of shares purchased under ESPP	$	5.36
Intrinsic value of shares purchased under ESPP	$	210,984

Schedule of Stock Options Activity

The following table sets forth the summary of option activity under the Company’s stock option plans for the years ended December 31, 2013, 2012, and 2011:

	Number of Shares			Weighted Average Exercise Price		Weighted Average Fair Value Of Options Granted		Aggregate Intrinsic Value of Options Exercised (In  thousands)
Outstanding at January 1, 2011		4,000,526		$	6.26
Granted		429,963			7.11	$	4.07
Exercised		(560,132	)		4.09			$	2,485
Cancelled		(602,519	)		6.99
Outstanding at December 31, 2011		3,267,838			6.61
Granted		425,150			6.10		3.35
Exercised		(231,403	)		4.52				443
Cancelled		(305,954	)		7.10
Outstanding at December 31, 2012		3,155,631			6.65
Granted		1,058,700			10.20		5.63
Exercised		(956,633	)		6.68				5,774
Cancelled		(30,531	)		8.75
Outstanding at December 31, 2013		3,227,167			7.78

Schedule of Information Regarding Stock Options Outstanding

Information regarding stock options outstanding at December 31, 2013, 2012, and 2011 is summarized below:

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)		Aggregate Intrinsic Value (In millions)
December 31, 2011
Options outstanding		3,267,838	$	6.61		5.53	$	1.3
Options vested and expected to vest using estimated forfeiture rates		3,151,950		6.62		5.44		1.3
Options exercisable		2,377,683		6.99		4.61		0.8
December 31, 2012
Options outstanding		3,155,631	$	6.65		5.24	$	3.5
Options vested and expected to vest using estimated forfeiture rates		3,019,979		6.67		5.17		3.4
Options exercisable		2,329,987		6.91		4.69		2.5
December 31, 2013
Options outstanding		3,227,167	$	7.78		5.46	$	9.9
Options vested and expected to vest using estimated forfeiture rates		2,994,044		7.61		5.41		9.6
Options exercisable		1,774,546		6.67		4.95		7.5

Additional Information Regarding Options Outstanding

Additional information regarding options outstanding as of December 31, 2013 is as follows:

	Options Outstanding				Options Exercisable
Range of Exercise   Prices	Number Outstanding	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price		Number Exercisable	Weighted Average Exercise Price
$  2.70 - $3.81	25,630	5.20	$	2.84	25,630	$	2.84
3.85 - 3.85	600,000	5.87		3.85	600,000		3.85
4.17 - 6.11	417,541	4.97		5.49	335,700		5.49
6.12 - 6.39	378,000	5.55		6.20	145,265		6.18
6.41 - 8.61	437,184	4.77		7.48	361,832		7.58
8.71 - 9.20	153,712	3.92		9.13	122,119		9.11
9.53 - 9.53	850,000	6.18		9.53	0		0.00
10.24 - 14.80	250,100	5.72		13.79	69,000		14.02
15.12 - 15.12	15,000	3.62		15.12	15,000		15.12
16.57 - 16.57	100,000	3.74		16.57	100,000		16.57
$2.70 - $16.57	3,227,167	5.46	$	7.78	1,774,546	$	6.67

Schedule of Restricted Stock Units Activity

RSU activity for the years ended December 31, 2013, 2012, and 2011 was as follows:

	Number     of Shares			Weighted Average Grant Date     Fair Value		Fair Value of Released RSU’s     (In thousands)
Outstanding at January 1, 2011		417,923
Awarded		243,908		$	6.61
Released		(159,384	)			$	1,163
Forfeited		(94,682	)
Outstanding at December 31, 2011		407,765
Awarded		555,911			6.64
Released		(203,519	)				1,128
Forfeited		(51,506	)
Outstanding at December 31, 2012		708,651
Awarded		294,150			7.12
Released		(303,882	)				2,806
Forfeited		(30,863	)
Outstanding at December 31, 2013		668,056

Schedule of Information Regarding Restricted Stock Unit Outstanding

Information regarding RSU’s at December 31, 2013, 2012, and 2011 is summarized below:

	Number of       Shares		Weighted Average Remaining Contractual     Life (years)		Aggregate Intrinsic Value   (In millions)		Fair Value   (In millions)
December 31, 2011
RSUs outstanding		407,765		0.95	$	2.1	$	2.1
RSUs vested and expected to vest using estimated forfeiture rates		336,454		0.92	$	1.7
December 31, 2012
RSUs outstanding		708,651		1.09	$	4.9	$	4.9
RSUs vested and expected to vest using estimated forfeiture rates		588,170		1.05	$	4.0
December 31, 2013
RSUs outstanding		668,056		0.91	$	6.9	$	6.9
RSUs vested and expected to vest using estimated forfeiture rates		583,711		0.89	$	6.1

Schedule of Restricted Stock Awards Activity

Restricted stock award activity for the years ended December 31, 2013, 2012, and 2011 was as follows:

	Number     of Shares			Weighted Average Grant Date Fair Value		Total Fair Value of Awards Released (In thousands)
Outstanding at January 1, 2011		18,000		$	5.59
Awarded		30,000			6.61
Released		(21,000	)		5.74	$	159
Forfeited		(9,000	)		6.61
Outstanding at December 31, 2011		18,000			6.61
Awarded		57,750			5.70
Released		(31,750	)		6.72		171
Forfeited		0
Outstanding at December 31, 2012		44,000			5.34
Awarded		44,000			14.09
Released		(44,000	)		5.34		676
Forfeited		0
Outstanding at December 31, 2013		44,000			14.09

Schedule of Stock Option and Employee Stock Purchase Plan, Valuation Assumptions

The assumptions used to value option grants and shares under the ESPP are as follows:

	Options			Employee Stock Purchase Plan
	2013	2012	2011	2013	2012	2011
Expected life (in years)	4.9	4.5	4.5	0.5	0.5	0.5
Interest rate	0.8%	0.7%	0.8%	0.1%	0.1%	0.2%
Volatility	70%	70%	72%	67%	62%	45%
Dividend yield	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%

Schedule of Stock-Based Compensation

Total stock-based compensation recognized in the consolidated statements of operations is as follows:

	Year Ended December 31,
	2013		2012		2011
Income Statement Classifications	(In thousands)
Sales and marketing	$	747	$	547	$	526
Research and development		1,040		756		825
General and administrative		2,857		1,843		2,204
Total	$	4,644	$	3,146	$	3,555