Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Allocated Stock-based Compensation

The impact on our results of operations for recording stock-based compensation for the three and nine months ended September 30, 2012 and 2013 is as follows:

	For the three months ended September 30,				For the nine months ended September 30,
	2012		2013		2012		2013
General and administrative	$	38,719	$	13,689	$	158,947	$	13,961
Research and development		22,696		--		96,054		--
Total	$	61,415	$	13,689	$	255,001	$	13,961

Schedule of Unrecognized Compensation Expense

Due to unexercised options and warrants outstanding at September 30, 2013, we will recognize an aggregate total of $58,534 of compensation expense over the next two years based upon option and warrant award vesting parameters as shown below:

2013	$	27,956
2014		30,578
Total	$	58,534

Schedule of Option and Warrant Activity

The following unaudited tables summarize option and warrant activity during the nine months ended September 30, 2013.

	Options and Warrants Outstanding			Weighted Average Exercise Price
Outstanding at December 31, 2012		43,396,863		$	0.54
Options granted		--			--
Warrants issued		850,000			0.25
Expired		(643,094	)		0.55
Forfeited		(507,300	)		1.41
Exercised		--			--
Outstanding at September 30, 2013		43,096,469		$	0.48

Schedule of Information About Stock Options and Warrants

The following table summarizes information about stock options and warrants outstanding at September 30, 2013.

		Outstanding				Exercisable
			Weighted Average Remaining		Weighted Average			Weighted Average
	Range of Exercise Prices	Number Outstanding	Contractual Life (years)		Exercise Price	Number Exercisable		Exercise Price
$	0.17-0.95	40,024,414	3.59	$	0.42	39,941,081	$	0.42
	1.00-1.59	2,727,555	2.97		1.04	2,688,222		1.04
	2.25-4.00	344,500	2.27		2.54	344,500		2.54
$	0.25-4.00	43,096,469	3.54	$	0.48	42,973,802	$	0.48

Schedule of Restricted Stock Unit Activity

The following is a summary of restricted stock unit activity for the nine months ended September 30, 2013.

	Restricted Stock Units			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2012		2,940,133		$	1.11
Awarded at fair value		686,667			0.08
Canceled/Forfeited		--			--
Settled by issuance of stock		(258,553	)		0.82
Outstanding at September 30, 2013		3,368,247		$	0.92
Vested at September 30, 2013		3,368,247		$	0.92

Stock Options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Assumptions Used to Value Awards

The fair values for the options granted for the nine months ended September 30, 2012 were estimated at the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:

	Nine Months Ended September 30, 2012
Risk free interest rate	1.65%
Expected life (in years)	10.0
Expected volatility	78.97%
Expected dividend yield	0.00%

Warrant [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Assumptions Used to Value Awards

The fair values for the warrants issued for the six months ended September 30, 2012 and 2013 estimated at the date of issuance using the Black-Scholes option-pricing model with the following weighted average assumptions:

	Nine Months Ended September 30, 2012	Nine Months Ended September 30, 2013
Risk free interest rate	1.17%	0.65%
Expected life (in years)	5.76	4.42
Expected volatility	82.78%	90.68%
Expected dividend yield	0.00%	0.00%