Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

						Weighted-Average
	Shares					Remaining
	Underlying			Weighted-Average		Contractual Term
	Options			Exercise Price		(Years)
Stock Options
Outstanding at January 1, 2013		6,124,703		$	0.37		3.5
Granted		8,003,874		$	0.28		4.3
Exercised		-
Forfeited		(353,046	)	$	0.69
Outstanding as of December 31, 2013		13,775,531		$	0.31	3.7
Expected to vest		13,775,531		$	0.31	3.7
Exercisable at December 31, 2013		3,376,648		$	0.37		2.7

Summary of Weighted-Average Amounts for Assumptions

	2013			2012			2011
Expected price volatility		77.9	%		120.5	%		103.7	%
Risk free interest rate (U.S. treasury bonds)		0.5	%		0.5	%		0.8	%
Expected annual dividend yield		-			-			-
Expected option term (years)		3.5			3.5			3.1
Grant date fair value per share	$	0.23		$	0.26		$	0.34

Summary of Restricted Stock Activity

				Weighted-Average
				Grant Date Fair
	Shares			Value
Restricted Stock
Nonvested at January 1, 2013		2,676,724		$	0.32
Granted		4,163,374		$	0.26
Vested		(2,301,312	)	$	0.32
Forfeited		-
Nonvested as of December 31, 2013		4,538,786		$	0.27