Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2012

Stock-Based Compensation [Abstract]

Schedule of stock options and awards

	September 30, 2012
Common stock shares available for grant		3,600,194
Common stock options outstanding		3,099,155
Restricted stock awards outstanding		44,000
Restricted stock units outstanding		676,755

Schedule of employee stock purchase plan

	Nine Months Ended September 30, 2012
Shares purchased under ESPP		25,628
Average price of shares purchased under ESPP	$	4.77
Intrinsic value of shares purchased under ESPP	$	21,553

Schedule of stock options activity

	Nine Months Ended September 30, 2012			Year Ended December  31, 2011
Beginning outstanding balance		3,267,838			4,000,526
Granted		313,200			429,963
Exercised		(209,208	)		(560,132	)
Forfeited and cancelled		(272,675	)		(602,519	)
Ending outstanding balance		3,099,155			3,267,838
Aggregate intrinsic value of options exercised	$	395,000		$	2,485,000
Weighted average fair value of options granted		3.32			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
September 30, 2012
Options outstanding		3,099,155	$	6.65		5.56	$	1.3
Options vested and expected to vest using estimated forfeiture rates		2,993,600		6.66		5.52		1.3
Options exercisable		2,265,176		6.97		5.02		1.0

Schedule of restricted stock units activity

	Nine Months Ended September 30, 2012			Year Ended December  31, 2011
Beginning outstanding balance		407,765			417,923
Awarded		479,911			243,908
Released		(203,519	)		(159,384	)
Forfeited		(7,402	)		(94,682	)
Ending outstanding balance		676,755			407,765
Weighted average grant date fair value of RSUs granted	$	6.78		$	6.61
Total fair value of RSUs released		1,128,000			1,163,000
Total fair value of RSUs remaining unvested		3,654,000			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
September 30, 2012
RSUs outstanding		676,755		1.24	$	3.7	$	3.7
RSUs vested and expected to vest using estimated forfeiture rates		551,319		1.21		3.0

Schedule of restricted stock awards activity

	Nine Months Ended September 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 September 30,						Nine Months Ended September 30,
Options	2012			2011			2012			2011
Expected life (in years)		4.5			4.5			4.5			5.0
Volatility		68	%		70	%		70	%		69	%
Interest rate		0.6	%		0.9	%		0.7	%		1.7	%
Dividend yield		N/A			N/A			N/A			N/A

	Three Months Ended September 30,						Nine Months Ended September 30,
Employee Stock Purchase Plan	2012			2011			2012			2011
Expected life (in years)		0.5			0.5			0.5			0.5
Volatility		52	%		40	%		62	%		45	%
Interest rate		0.1	%		0.2	%		0.1	%		0.2	%
Dividend yield		N/A			N/A			N/A			N/A

Schedule of stock-based compensation

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands)				(In thousands)
Statement of Operations Classifications
Sales and marketing	$	152	$	132	$	376	$	376
Research and development		173		201		586		639
General and administrative		483		607		1,384		1,690
Total	$	808	$	940	$	2,346	$	2,705