Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Stock Options and Awards

	June 30,
	2013
Common stock shares available for grant		1,828,299
Common stock options outstanding		3,238,719
Restricted stock awards outstanding		44,000
Restricted stock units outstanding		727,973

Schedule of Employee Stock Purchase Plan

	Six Months Ended June 30, 2013
Shares purchased under ESPP		16,003
Average price of shares purchased under ESPP	$	4.51
Intrinsic value of shares purchased under ESPP	$	36,727

Schedule of Stock Options Activity

The following table sets forth the summary of option activity under the Company’s stock option plans for the six months ended June 30, 2013 and year ended December 31, 2012:

	Six Months Ended June 30, 2013			Year Ended December  31, 2012
Beginning outstanding balance		3,155,631			3,267,838
Granted		1,006,700			425,150
Exercised		(900,925	)		(231,403	)
Forfeited and cancelled		(22,687	)		(305,954	)
Ending outstanding balance		3,238,719			3,155,631
Aggregate intrinsic value of options exercised	$	5,390,000		$	443,000
Weighted average fair value of options granted		5.59			3.35

Schedule of Information Regarding Stock Options Outstanding

Information regarding stock options outstanding at June 30, 2013 and December 31, 2012 is summarized below:

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)		Aggregate Intrinsic Value (In millions)
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
June 30, 2013
Options outstanding		3,238,719	$	7.67		5.93	$	18.6
Options vested and expected to vest using estimated forfeiture rates		2,940,922		7.49		5.86		17.4
Options exercisable		1,643,808		6.77		5.31		11.1

Schedule of Restricted Stock Units Activity

RSU activity for the six months ended June 30, 2013 and year ended December 31, 2012 was as follows:

	Six Months Ended June 30, 2013			Year Ended December  31, 2012
Beginning outstanding balance		708,651			407,765
Awarded		294,150			555,911
Released		(261,881	)		(203,519	)
Forfeited		(12,947	)		(51,506	)
Ending outstanding balance		727,973			708,651
Weighted average grant date fair value of RSUs granted	$	7.12		$	6.64
Total fair value of RSUs released		2,266,000			1,128,000
Total fair value of RSUs remaining unvested		9,646,000			4,868,000

Schedule of Information Regarding Restricted Stock Unit Outstanding

Information regarding RSUs outstanding at June 30, 2013 and December 31, 2012 is summarized below:

	Number of Shares		Weighted Average Remaining Contractual Life (years)		Aggregate Intrinsic Value (In  millions)		Fair Value (In  millions)
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
June 30, 2013
RSUs outstanding		727,973		1.35	$	9.6	$	9.6
RSUs vested and expected to vest using estimated forfeiture rates		595,309		1.31		7.9

Schedule of Restricted Stock Awards Activity

Restricted stock award activity for the six months ended June 30, 2013 and year ended December 31, 2012 was as follows:

	Six Months Ended June 30, 2013			Year Ended December  31, 2012
Beginning outstanding balance		44,000			18,000
Awarded		44,000			57,750
Released		(44,000	)		(31,750	)
Forfeited		0			0
Ending outstanding balance		44,000			44,000
Weighted average grant date fair value of restricted stock awarded	$	14.09		$	5.70
Total fair value of restricted stock awards released		620,000			171,000

Schedule of Stock Option 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,
Options	2013			2012			2013			2012
Expected life (in years)		4.7			4.5			4.9			4.5
Volatility		67	%		70	%		68	%		70	%
Interest rate		0.8	%		0.7	%		0.8	%		0.7	%
Dividend yield		N/A			N/A			N/A			N/A

	Three Months Ended June 30,				Six Months Ended June 30,
Employee Stock Purchase Plan	2013		2012		2013			2012
Expected life (in years)		N/A		N/A		0.5			0.5
Volatility		N/A		N/A		66	%		72	%
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 operations and comprehensive income (loss) is as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2013		2012		2013		2012
	(In thousands)				(In thousands)
Statement of Operations Classifications
Sales and marketing	$	109	$	109	$	273	$	224
Research and development		262		204		576		413
General and administrative		780		505		1,340		901
Total	$	1,151	$	818	$	2,189	$	1,538