Equity Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2012

Equity Incentive Plans [Abstract]

Option activity under its Stock Plans

As of September 30, 2012, the Company had the following option activity under its Stock Plans:

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value
Options outstanding at December 31, 2011		4,016,393		$	4.89
Granted		1,508,070			13.47
Exercised		(89,977	)		3.51
Forfeited		(37,527	)		9.32
Options outstanding at September 30, 2012		5,396,959		$	7.28		6.87 years	$	26,685,432