Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Stock-Based Compensation [Abstract]

Schedule of Stock Options and Awards

	June 30, 2012
Common stock shares available for grant		3,654,744
Common stock options outstanding		3,111,411
Restricted stock awards outstanding		44,000
Restricted stock units outstanding		658,005

Schedule of Employee Stock Purchase Plan

	Six Months Ended June  30, 2012
Shares purchased under ESPP		10,656
Average price of shares purchased under ESPP	$	4.79
Intrinsic value of shares purchased under ESPP	$	8,999

Schedule of Stock Options Activity

	Six Months Ended June  30, 2012			Year Ended December  31, 2011
Beginning outstanding balance		3,267,838			4,000,526
Granted		303,650			429,963
Exercised		(197,652	)		(560,132	)
Forfeited and cancelled		(262,425	)		(602,519	)
Ending outstanding balance		3,111,411			3,267,838
Aggregate intrinsic value of options exercised	$	361,000		$	2,485,000
Weighted average fair value of options granted		3.33			4.07

Schedule of information regarding stock options outstanding

	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
June 30, 2012
Options outstanding		3,111,411	$	6.64		5.78	$	1.6
Options vested and expected to vest using estimated forfeiture rates		2,987,038		6.66		5.72		1.6
Options exercisable		2,194,758		7.03		5.14		1.1

Schedule of Restricted Stock Units Activity

	Six Months Ended June  30, 2012			Year Ended December 31, 2011
Beginning outstanding balance		407,765			417,923
Awarded		451,911			243,908
Released		(196,185	)		(159,384	)
Forfeited		(5,486	)		(94,682	)
Ending outstanding balance		658,005			407,765
Weighted average grant date fair value of RSUs granted	$	6.85		$	6.61
Total fair value of RSUs released		1,088,000			1,163,000
Total fair value of RSUs remaining unvested		3,705,000			2,112,000

Schedule of Information Regarding Restricted Stock Units Outstanding

	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
June 30, 2012
RSUs outstanding		658,005		1.45	$	3.7	$	3.7
RSUs vested and expected to vest using estimated forfeiture rates		516,223		1.42		2.9

Schedule of restricted stock awards activity

	Six Months Ended June  30, 2012			Year Ended December 31, 2011
Beginning outstanding balance		18,000			18,000
Awarded		57,750			30,000
Released		(31,750	)		(21,000	)
Forfeited		0			(9,000	)
Ending outstanding balance		44,000			18,000
Weighted average grant date fair value of restricted stock awarded	$	5.70		$	6.61
Total fair value of restricted stock awards released		329,000			159,000

Schedule of Employee Stock Purchase Plan, Valuation Assumptions

	Three Months Ended June  30,						Six Months Ended June 30,
Options	2012			2011			2012			2011
Expected life (in years)		4.5			5.2			4.5			5.2
Volatility		70	%		68	%		70	%		68	%
Interest rate		0.7	%		2.0	%		0.7	%		2.0	%
Dividend yield		N/A			N/A			N/A			N/A
	Three Months Ended June  30,						Six Months Ended June 30,
Employee Stock Purchase Plan	2012			2011			2012			2011
Expected life (in years)		N/A			N/A			0.5			0.5
Volatility		N/A			N/A			72	%		50	%
Interest rate		N/A			N/A			0.1	%		0.2	%
Dividend yield		N/A			N/A			N/A			N/A

Schedule of Stock-based Compensation

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(In thousands)				(In thousands)
Statement of Operations Classifications
Sales and marketing	$	109	$	70	$	224	$	245
Research and development		204		233		413		437
General and administrative		505		678		901		1,083
Total	$	818	$	981	$	1,538	$	1,765