Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Assumptions Used to Determine Fair Value of Stock Options Granted During Period

The following assumptions apply to the options to purchase 3,130,083 and 157,500 shares of common stock granted to employees and directors during the nine months ended September 30, 2013 and 2012, respectively:

	Nine Months Ended September 30,
	2013			2012
Average risk free interest rate		1.3	%		0.9	%
Expected dividend yield		—			—
Expected lives (years)		5.2			5.6
Expected volatility		62.0	%		63.0	%
Weighted average grant date fair value of options granted during the period (per share)	$	0.49		$	0.54
Weighted average exercise price of options granted during the period (per share)	$	0.92		$	0.97