Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2013

Stock Option Activity

Unvested stock option activity for non-employees:

	Number of  Options		Weighted  Average Exercise  Price		Weighted  Average  Remaining  Contracted  Term (Years)	Aggregate Intrinsic Value
Outstanding January 1, 2011	102,084		$	2.63	3.54	—
Granted	200,000		0.21		10.00	—
Vested	(45,834	)	2.81		1.50	—
Forfeited	—		—		—	—
Outstanding December 31, 2011	256,250		$	0.71	8.50	—
Granted	300,000		0.29		9.50	—
Vested	(345,828	)	0.53		7.95	—
Forfeited	—		—		—	—
Outstanding December 31, 2012	210,422		$	0.40	9.68	—
Granted	470,833		0.25		9.61	—
Vested	(210,422	)	0.40		—	—
Forfeited	—		—		—	—
Outstanding December 31, 2013	470,833		$	0.25	9.61	—

Stock option activity for non-employees during the year:

	Number of  Options		Weighted  Average Exercise  Price		Weighted  Average  Remaining  Contracted  Term (Years)	Aggregate Intrinsic Value
Outstanding January 1, 2011	2,848,432		$	2.03	5.80	—
Granted	280,000		0.27		9.88	—
Exercised	—		—		—	—
Forfeited	—		—		—	—
Outstanding December 31, 2011	3,128,432		$	1.87	5.25	—
Granted	300,000		0.29		9.50	—
Exercised	—		—		—	—
Forfeited	—		—		—	—
Outstanding December 31, 2012	3,428,432		$	1.73	4.71	—
Granted	850,000		0.56		9.53	—
Exercised	—		—		—	—
Forfeited	(150,000	)	2.00		—	—
Outstanding December 31, 2013	4,128,432		$	1.48	5.01	—
Vested and expected to vest at December 31, 2013	3,657,599		$	1.86	4.53	—
Exercisable at December 31, 2013	3,657,599		$	1.86	4.53	—

Unvested stock option activity for employees:

	Number of  Options		Weighted  Average Exercise  Price		Average  Remaining  Contracted  Term (Years)	Aggregate Intrinsic  Value
Outstanding January 1, 2011	50,555		$	1.33	7.60	—
Granted	140,000		0.33		9.93	—
Vested	(42,222	)	0.95		7.38	—
Forfeited	—		—		0	—
Outstanding December 31, 2011	148,333		$	0.49	9.52	—
Granted	509,708		0.43		9.52	—
Vested	(131,668	)	0.36		9.04	—
Forfeited	(10,000	)	1.30		5.50	—
Outstanding December 31, 2012	516,373		$	0.45	9.43	—
Granted	595,000		0.24		9.20	—
Vested	(586,373	)	0.38		9.26	—
Forfeited	—		—		0	—
Outstanding December 31, 2013	525,000		$	0.29	8.38	—

Stock option activity during the years ended December 31, 2011, 2012 and 2013 is as follows:

Stock option activity for employees:

	Number of  Options		Weighted Average Exercise Price		Weighted Average Remaining Contracted Term (Years)	Aggregate Intrinsic Value
Outstanding January 1, 2011	7,222,480		$	2.35	6.21	—
Granted	1,030,000		0.41		9.51	—
Forfeited	—		—		0	—
Outstanding December 31, 2011	8,252,480		$	2.11	5.75	—
Granted	1,199,000		0.45		9.51	—
Forfeited	(10,000	)	1.30		5.50	—
Outstanding December 31, 2012	9,441,480		$	1.90	5.35	—
Granted	1,170,000		0.36		9.49	—
Forfeited	—		—		0	—
Outstanding December 31, 2013	10,611,480		$	1.73	4.92	—
Vested and expected to vest at December 31, 2013	10,086,480		$	1.79	4.55	—
Exercisable at December 31, 2013	10,086,480		$	1.79	4.55	—

Fair Value, Weighted Average Assumptions

The fair values of the options and equity warrants granted, were estimated based on the following weighted average assumptions:

	Year Ended December 31,
	2013	2012	2011
Risk-free interest rate	0.14%-1.40%	0.61%- 0.86%	0.83%- 2.24%
Expected dividend yield	0	0	0
Expected life	1-5 years	5 years	5 years
Expected volatility	89.727%-118.22%	108.76%-112.35%	104.29%-105.91%
Weighted average grant date fair value for options and equity warrants issued	$0.14 per option/warrant for 4,120,000 options/equity warrants	$0.23 per option/warrant for 1,499,000 options/equity warrants	$0.26 per option/warrant for 1,310,000 options/equity warrants

Stock Option Plan - 1990

Stock Option Activity

Information regarding the options approved by the Board of Directors under the 1990 Stock Option Plan is summarized below:

	2011					2012						2013
	Shares		Option Price	Weighted Average Exercise Price		Shares		Option Price		Weighted Average Exercise Price		Shares		Option Price		Weighted Average Exercise Price
Outstanding, beginning of year	262,000		2.75-4.03	$	3.05	262,000		2.75-4.03		$	3.05	200,000		2.75		$	2.75
Granted	—		—	—		—		—		—		—		—		—
Forfeited	—		—	—		(62,000	)	4.03		4.03		(200,000	)	2.75		2.75
Exercised	—		—	—		—		—		—		—		—		—
Outstanding, end of year	262,000		2.75-4.03	$	3.05	200,000		$	2.75	$	2.75	—		$	—	$	—
Exercisable	262,000		2.75-4.03	$	3.05	200,000		$	2.75	$	2.75	—		$	—	$	—
Weighted average remaining contractual life (years)	2.86 years					0.83 years						0
Exercised in current and prior years	(27,215	)				(27,215	)					(27,215	)
Available for future grants	—					—						—

Equity Plan

Stock Option Activity

Information regarding the options approved by the Board of Directors under the Equity Plan is summarized below:

	December 31, 2011			December 31, 2012				December 31, 2013
	Shares	Option Price	Weighted Average Exercise Price	Shares		Option Price	Weighted Average Exercise Price	Shares		Option Price	Weighted Average Exercise Price
Outstanding beginning at year	6,640,934	1.30-6.00	2.66	6,640,934		1.30-6.00	2.66	6,630,934		1.30-6.00	2.66
Granted	—	—	—	—		—	—	—		—	—
Forfeited	—	—	—	(10,000	)	1.30	1.30	(150,000	)	2.00	2.00
Exercised	—	—	—	—		—	—	—		—	—
Outstanding end of year	6,640,934	1.30-6.00	2.66	6,630,934		1.30-6.00	2.66	6,480,934		1.30-6.00	2.68
Exercisable	6,625,934	1.30-6.00	2.66	6,630,934		1.30-6.00	2.66	6,480,934		1.30-6.00	2.68
Weighted average remaining contractual life (years)	4-5 years			3-4 years				2-3 years
Available for future grants	10,019			10,019				170,019

Equity Incentive Plan - 2007

Stock Option Activity

As of year-end, option awards under this plan were:

	December 31, 2011			December 31, 2012			December 31, 2013
	Shares	Option Price	Weighted Average Exercise Price	Shares	Option Price	Weighted Average Exercise Price	Shares	Option Price	Weighted Average Exercise Price
Outstanding beginning at year	1,550,000	0.72-3.05	2.17	1,550,000	0.72-3.05	2.17	1,550,000	0.72-3.05	2.17
Granted	—	—	—	—	—	—	—	—	—
Forfeited	—	—	—	—	—	—	—	—	—
Exercised	—	—	—	—	—	—	—	—	—
Outstanding end of year	1,550,000	0.72-3.05	2.17	1,550,000	0.72-3.05	2.17	1,550,000	0.72-3.05	2.17
Exercisable	1,550,000	0.72-3.05	2.17	1,550,000	0.72-3.05	2.17	1,550,000	0.72-3.05	2.17
Remaining contractual life	6.81 years			5.81 years			4.81 years
Available for future grants	19,626			19,626			19,626

Equity Incentive Plan - 2009

Stock Option Activity

As of year-end, option awards under this plan were:

	December 31, 2011			December 31, 2012			December 31, 2013
	Shares	Option Price	Weighted Average Exercise Price	Shares	Option Price	Weighted Average Exercise Price	Shares	Option Price	Weighted Average Exercise Price
Outstanding beginning at year	1,879,978	0.52-2.81	0.92	3,189,978	0.21-2.81	0.70	4,688,978	0.21-4.03	0.61
Granted	1,310,000	0.21-0.55	0.38	1,499,000	0.29-4.03	0.42	2,020,000	0.22-2.00	0.40
Forfeited	—	—	—	—	—	—	—	—	—
Exercised	—	—	—	—	—	—	—	—	—
Outstanding end of year	3,189,978	0.21-2.81	0.70	4,688,978	0.21-4.03	0.61	6,708,978	0.21-4.03	0.55
Exercisable at end of year	2,856,645	0.21-2.81	1.57	3,962,183	0.21-4.03	0.61	5,713,145	0.21-4.03	0.55
Remaining contractual life	6.81 years			7.67 years			8.21 years
Available for future grants	9,765,847			6,907,247			3,090,478

Warrant

Stock Option Activity

	December 31, 2011					December 31, 2012				December 31, 2013
	Shares		Warrant Price	Weighted Average Exercise Price		Shares	Warrant Price	Weighted Average Exercise Price		Shares	Warrant Price	Weighted Average Exercise Price
Outstanding beginning at year	10,983,246		0.51-3.60	$	1.61	10,978,246	0.51-1.65	$	1.55	11,128,246	0.51-2.00	$	1.44
Granted	—		—	—		150,000	0.89-2.00	$	1.30	2,100,000	0.25-0.50	$	0.33
Forfeited	(5,000	)	3.60	$	3.60	—	—	—		—	—	—
Exercised	—		—	—		—	—	—		—	—	—
Outstanding end of year	10,978,246		0.51 –1.65	$	1.55	11,128,246	0.51 –2.00	$	1.44	13,228,246	0.25-2.00	$	1.26
Exercisable	10,978,246		0.51-1.65	$	1.55	11,128,246	0.51-2.00	$	1.44	11,328,246	0.50-2.00	$	1.42
Weighted average remaining contractual life	2.9 years					2.0 years				1.5 years
Years exercisable	2012-2019					2013-2022				2014-2023

Fair Value, Weighted Average Assumptions

The fair values of the warrants granted in 2013, were estimated based on the following weighted average assumptions:

	December 31, 2013
Risk-free interest rate	0.14%-1.40%
Expected dividend yield	—
Expected life	2.5 years
Expected volatility	89.73%-118.22%
Weighted average grant date fair value of warrants issued	$0.11 for 2,100,000 warrants