Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2014

Stockholders' Equity [Abstract]

Summary of stock option activity

The following table represents the stock option activity for the three months ended March 31, 2014:

	Number of Shares			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding options at December 31, 2013		5,382,391		$	3.55		3.66	$	4,039
Granted		-		$	-
Exercised		(25,454	)	$	2.34
Forfeited		(218,405	)	$	4.21
Outstanding options at March 31, 2014		5,138,532		$	3.53		2.61	$	455
Options vested and expected to vest		5,069,321		$	3.51		2.54	$	454
Exercisable at March 31, 2014		4,093,028		$	3.32		1.62	$	418

Summary of restricted stock units activity

The following table represents RSU activity for the three months ended March 31, 2014:

	Number of Shares			Weighted Average Grant-Date Fair Value per Share		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding RSUs at December 31, 2013		1,658,846		$	5.09		1.57	$	6,287
Awarded		92,130		$	2.96
Released		(170,895	)	$	4.15
Forfeited		(428,075	)	$	4.55
Outstanding RSUs at March 31, 2014		1,152,006		$	5.25		1.55	$	2,968