Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

We estimated the fair value of each option award at the grant date by using the Black-Scholes option pricing model with the following range of assumptions for awards made during the years ended December 31, 2014 and 2013:

	2014		2013
Dividend yield	0	%	0	%
Expected volatility, in years	90	%	90	%
Risk-free interest rates	1.5	%	1.4% to 2.8	%
Expected lives, in years	5		5 to 10

Stock Option Activity

The following table summarizes our stock option activity for the periods presented:

		Weighted-
	Number	Average
	of Shares	Exercise
	Issuable	Price
Balance, January 1, 2013	5,710,125	$	1.10
Granted	3,085,000		0.54
Exercised	(2,500)		0.88
Cancelled	(1,290,204)		0.36
Balance, December 31, 2013	7,502,421	$	1.00
Granted	175,000		0.84
Exercised	(186,225)		0.88
Cancelled	(3,363,068)		0.96
Balance, December 31, 2014	4,128,128	$	1.04

Options Outstanding

The following table summarizes options outstanding at December 31, 2014:

		Weighted-		Weighted-
	Number	Average		Average	Aggregate
	of Shares	Exercise		Remaining	Intrinsic
	Issuable	Price		Term (Years)	Value
Exercisable	3,438,128	$	1.03	2.5	$	3,000
Not vested	690,000		1.06	3.4		-
Balance, December 31, 2014:	4,128,128	$	1.04	2.7	$	3,000

Schedule of Stockholders' Equity Note, Warrants or Rights

The following table sets forth our warrant activity during the periods presented:

			Weighted-
	Number		Average
	of Shares		Exercise
	Issuable		Price
Balance, January 1, 2013		27,353,151	$	0.79
Granted		14,875,004		0.60
Cancelled		(632,500)		1.56
Balance, December 31, 2013		41,595,655	$	0.69
Granted		7,435,901		0.67
Cancelled pursuant to Tender Offer		(46,276,774)		0.67
Exercised		(155,568)		0.60
Cancelled		(1,433,068)		0.87
Balance, December 31, 2014		1,166,146	$	1.13