Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2014

Equity [Abstract]

Summary of Stock Option Activity

A summary of stock option activity under the Plan as of September 30, 2014, and the changes during the nine months then ended is as follows:

	Number of Shares			Weighted Average Exercise Price ($)		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value ($)
Outstanding at December 31, 2013		7,697,892			1.89
Granted		1,957,701			3.08
Exercised		(1,991,728	)		1.19				3,499,052
Cancelled/Forfeited		(556,675	)		3.36
Outstanding at September 30, 2014		7,107,190			2.30		6.3		2,050,397
Exercisable at September 30, 2014		4,893,821			1.85		5.0		2,050,397

Assumptions Used in Fair Value Measurement of Options Granted

	September 30,
	2014			2013
Risk-free interest rate		1.7	%		0.7	%
Annualized volatility		62.0	%		62.5	%
Weighted average expected life, in years		6.0			6.0
Expected dividend yield		0.0	%		0.0	%

Schedule of Performance Stock Unit Awards and Restricted Stock Granted Under Long Term Incentive Program

The performance stock unit awards and restricted stock granted under the long term incentive program are summarized in the following table:

	Performance Stock Units					Restricted Stock
	Number of Shares			Weighted Average Fair Value ($)		Number of Shares			Weighted Average Fair Value ($)
Outstanding at December 31, 2013		406,663			3.19		155,724			3.96
Granted		651,980			3.02		325,991			3.02
Vested		(75,000	)		1.66		(51,907	)		3.96
Forfeited/Expired		(400,360	)		3.21		(150,726	)		3.45
Outstanding at September 30, 2014		583,283			3.19		279,082			3.14