Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Stock Options and Awards

	June 30, 2015
Common stock shares available for grant	1,405,106
Common stock options outstanding	3,812,753
Restricted stock awards outstanding	21,356
Restricted stock units outstanding	542,971

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.

	Six Months Ended June 30, 2015
Shares purchased under ESPP	23,713
Average price of shares purchased under ESPP	$	8.00
Intrinsic value of shares purchased under ESPP	$	33,000

Schedule of Standard and Market-based Stock Options Activity

The following table sets forth the summary of activity with respect to standard stock options granted under the Company’s stock option plans for the six months ended June 30, 2015 and year ended December 31, 2014:

	Six Months Ended June 30, 2015			Year Ended December 31, 2014
Beginning outstanding balance	3,486,157			3,227,167
Granted	366,520			604,620
Exercised	(104,510		)	(205,744		)
Forfeited	(91,664		)	(102,454		)
Expired	(43,750		)	(37,432		)
Ending outstanding balance	3,612,753			3,486,157
Aggregate intrinsic value of options exercised	$	528,000		$	1,125,000
Weighted average fair value of options granted	4.18			4.93

The following table sets forth activity with respect to market condition based stock options granted under the Company’s stock option plans for the six months ended June 30, 2015 and year ended December 31, 2014:

	Six Months Ended June 30, 2015		Year Ended December 31, 2014
Beginning outstanding balance	50,000		—
Granted	150,000		50,000
Exercised	—		—
Forfeited and cancelled	—		—
Ending outstanding balance	200,000		50,000
Aggregate intrinsic value of options exercised	$	—	$	—
Weighted average fair value of options granted	3.64		5.71

Schedule of Information Regarding Standard and Market Condition Based Stock Options Outstanding

Information regarding these market condition based stock options outstanding at June 30, 2015 and December 31, 2014 is summarized below:

	Number of Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value (In millions)
December 31, 2014
Options outstanding	50,000	$	11.94	6.15	$	—
Options vested and expected to vest using estimated forfeiture rates	45,430	11.94		6.15	—
Options exercisable	—	—		—	—
June 30, 2015
Options outstanding	200,000	$	9.05	6.42	$	0.7
Options vested and expected to vest using estimated forfeiture rates	176,570	9.12		6.40	0.6
Options exercisable	—	—		—	—

Information regarding these standard stock options outstanding at June 30, 2015 and December 31, 2014 is summarized below:

	Number of Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value (In millions)
December 31, 2014
Options outstanding	3,486,157	$	8.30	4.85	$	6.6
Options vested and expected to vest using estimated forfeiture rates	3,319,308	8.21		4.80	6.6
Options exercisable	2,023,024	7.18		4.26	6.0
June 30, 2015
Options outstanding	3,612,753	$	8.27	4.53	$	16.5
Options vested and expected to vest using estimated forfeiture rates	3,460,999	8.21		4.46	16.0
Options exercisable	2,203,208	7.47		3.80	12.0

Schedule of Restricted Stock Units Activity

RSU activity for the six months ended June 30, 2015 and year ended December 31, 2014 was as follows:

	Six Months Ended June 30, 2015			Year Ended December 31, 2014
Beginning outstanding balance	564,891			668,056
Awarded	278,790			265,630
Released	(264,194		)	(317,970		)
Forfeited	(36,516		)	(50,825		)
Ending outstanding balance	542,971			564,891
Weighted average grant date fair value of RSUs granted	$	8.12		$	11.35
Total fair value of RSUs released	2,214,000			3,491,000

Schedule of Information Regarding Restricted Stock Units Outstanding

Information regarding RSUs outstanding at June 30, 2015 and December 31, 2014 is summarized below:

	Number of Shares	Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value (In millions)
December 31, 2014
RSUs outstanding	564,891	0.84	$	5.3
RSUs vested and expected to vest using estimated forfeiture rates	502,411	0.80	4.8
June 30, 2015
RSUs outstanding	542,971	1.33	$	6.9
RSUs vested and expected to vest using estimated forfeiture rates	430,887	1.28	5.5

Schedule of Restricted Stock Awards Activity

Restricted stock award activity for the six months ended June 30, 2015 and year ended December 31, 2014 was as follows:

	Six Months Ended June 30, 2015			Year Ended December 31, 2014
Beginning outstanding balance	35,364			44,000
Awarded	21,356			35,364
Released	(35,364		)	(44,000		)
Forfeited	—			—
Ending outstanding balance	21,356			35,364
Weighted average grant date fair value of restricted stock awarded	$	12.26		$	10.97
Total fair value of restricted stock awards released	434,000			483,000

Schedule of Stock Options, Market Condition Based Stock Options and Employee Stock Purchase Plan, Valuation Assumptions

The assumptions used to value option grants under the Company’s stock plans were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Standard Stock Options
Expected life (in years)	4.6		4.7		4.7		4.7
Volatility	55	%	56	%	56	%	57	%
Interest rate	1.4	%	1.4	%	1.4	%	1.4	%
Dividend yield	N/A		N/A		N/A		N/A

	Three Months Ended June 30,		Six Months Ended June 30,
	2015	2014	2015		2014
Market Condition Based Stock Options
Expected life (in years)	N/A	N/A	7.0		7.0
Volatility	N/A	N/A	65	%	66	%
Interest rate	N/A	N/A	1.9	%	2.2	%
Dividend yield	N/A	N/A	N/A		N/A

	Three Months Ended June 30,		Six Months Ended June 30,
	2015	2014	2015		2014
Employee Stock Purchase Plan
Expected life (in years)	N/A	N/A	0.5		0.5
Volatility	N/A	N/A	45	%	39	%
Interest rate	N/A	N/A	0.1	%	0.1	%
Dividend yield	N/A	N/A	N/A		N/A

Schedule of Stock-Based Compensation

Total stock-based compensation recognized in the condensed consolidated statements of income and comprehensive income is as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
	(In thousands)				(In thousands)
Statement of Income Classifications
Sales and marketing	$	288	$	324	$	552	$	554
Research and development	264		268		760		743
General and administrative	677		752		1,657		1,630
Total	$	1,229	$	1,344	$	2,969	$	2,927