Note 11 - Fair Value Measures (Tables)

6 Months Ended

Jun. 30, 2014

Note 11 - Fair Value Measures (Tables) [Line Items]

Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]

			Fair Value Measurements at Reporting Date Using:
			Quoted Prices
			in Active		Significant
			Markets for		Other		Significant
	Balance as of		Identical		Observable		Unobservable
	December 31,		Assets		Inputs		Inputs
Description	2013		(Level 1)		(Level 2)		(Level 3)
Liabilities
Convertible notes	$	4,537,000	$	—	$	—	$	4,537,000
Warrant liabilities	$	2,680,000	$	—	$	—	$	2,680,000
Total Liabilities	$	7,217,000	$	—	$	—	$	7,217,000

			Fair Value Measurements at Reporting Date Using:
			Quoted Prices
			in Active		Significant
			Markets for		Other		Significant
	Balance as of		Identical		Observable		Unobservable
	June 30,		Assets		Inputs		Inputs
Description	2014		(Level 1)		(Level 2)		(Level 3)
Liabilities
Convertible notes	$	4,653,000	$	—	$	—	$	4,653,000
Warrant liabilities	$	10,000	$	—	$	—	$	10,000
Total Liabilities	$	4,663,000	$	—	$	—	$	4,663,000

Fair Value, by Balance Sheet Grouping [Table Text Block]

	Fair Value of 2011 Convertible Notes			Fair Value of 2011 Warrant Liabilities			Fair Value of 2012 Convertible Notes			Fair Value of 2012 Warrant Liabilities			Fair Value of Third Tranche Convertible Notes			Fair Value of Third Tranche Warrant Liabilities			February 2013 Warrants			February 2013 SPA Option			September 2013 Warrants			September 2013 SPA Options			April 2014 Notes			April 2014 Warrants			May 2014 Notes			May 2014 Warrants		Total
Balance December 31, 2012	$	6,510,000		$	2,000,000		$	1,588,000		$	1,800,000		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	11,898,000
Allocation of initial proceeds	$	—		$	—		$	—		$	—		$	142,000		$	108,000		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	250,000
Initial fair value adjustment	$	—		$	—		$	—		$	—		$	252,000		$	192,000		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	444,000
January 16, 2013	$	6,510,000		$	2,000,000		$	1,588,000		$	1,800,000		$	394,000		$	300,000		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	12,592,000
Amortization of debt discount	$	38,000		$	—		$	55,000		$	—		$	2,000		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	95,000
Fair value adjustment	$	(370,000	)	$	—		$	(72,000	)	$	—		$	(8,000	)	$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	(450,000	)
Carrying value of old debt at modification	$	(6,178,000	)	$	—		$	(1,571,000	)	$	—		$	(388,000	)	$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	(8,137,000	)
Fair value of new debt at modification	$	6,070,000		$	—		$	1,516,000		$	—		$	386,000		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	7,972,000
Modification of warrants	$	—		$	1,916,000		$	—		$	632,000		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	2,548,000
Cancellation/retirement of warrants	$	—		$	—		$	—		$	(800,000	)	$	—		$	(300,000	)	$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	(1,100,000	)
Fair value of instruments at issuance	$	—		$	—		$	—		$	—		$	—		$	—		$	2,759,000		$	1,211,000		$	—		$	—		$	—		$	—		$	—		$	—	$	3,970,000
February 22, 2013	$	6,070,000		$	3,916,000		$	1,516,000		$	1,632,000		$	386,000		$	—		$	2,759,000		$	1,211,000		$	—		$	—		$	—		$	—		$	—		$	—	$	17,490,000
Exercise of warrants	$	—		$	(1,731,000	)	$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—	$	(1,731,000	)
Conversion of debentures	$	(450,000	)																																							$	(450,000	)
Fair value adjustment	$	(1,240,000	)	$	(376,000	)	$	(336,000	)	$	(653,000	)	$	( 91,000	)	$	—		$	(742,000	)	$	(807,000	)	$	—		$	—		$	—		$	—		$	—		$	—	$	(4,245,000	)
June 30, 2013		4,380,000			1,809,000		$	1,180,000		$	979,000		$	295,000		$	—		$	2,017,000		$	404,000		$	--		$	--		$	--		$	--		$	--		$	--	$	11,064,000
Balance at December 31, 2013	$	3,290,000		$	179,000		$	1,010,000		$	141,000		$	237,000		$	—		$	1,441,000		$	--		$	627,000		$	292,000		$	--		$	--		$	--		$	--	$	7,217,000
Allocation of initial proceeds	$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	205,000			45,000		$	--		$	--	$	250,000
Initial fair value adjustment	$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--			56,000			13,000		$	--		$	--	$	69,000
Balance at April 14, 2014	$	3,290,000		$	179,000		$	1,010,000		$	141,000		$	237,000		$	--		$	1,441,000		$	--		$	627,000		$	292,000		$	261,000		$	58,000		$	--		$	--		7,536,000
Allocation of initial proceeds	$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	247,000-		$	3,000	$	250,000
Initial fair value adjustment	$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--		$	--			--		$	7,000		$	--	$	7,000
Balance at April 14, 2014	$	3,290,000		$	179,000		$	1,010,000		$	141,000		$	237,000		$	--		$	1,441,000		$	--		$	627,000		$	292,000		$	261,000		$	58,000		$	254,000		$	3,000	$	7,793,000
Amortization of Debt Discount	$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	8,000		$	—		$	—		$	—	$	8,000
Settlement of warrants	$	—		$	(120,000	)	$	—		$	(47,000	)	$	—		$	—		$	(480,000	)	$	—		$	(204,000	)	$	—		$	—		$	—		$	—		$	—	$	(851,000	)
Fair value adjustment	$	(280,000	)	$	(59,000	)	$	(80,000	)	$	(94,000	)	$	(5,000	)	$	—		$	(961,000	)	$	—		$	(423,000	)	$	(292,000	)		(27,000	)		(54,000	)		(15,000	)	$	3,000	$	(2,287,000	)
June 30, 2014	$	3,010,000		$	--		$	930,000		$	--		$	232,000		$	—		$	--		$	—		$	--		$	--		$	242,000		$	4,000		$	239,000		$	6,000	$	4,663,000

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Input	February 22, 2013			June 30, 2013
Stock Price	$	0.14		$	0.10
Exercise Price	$	0.15		$	0.15
Expected Life (in years)		0.75			0.39
Stock Volatility		110	%		110	%
Risk-Free Rate		0.15	%		0.07	%
Dividend Rate		0	%		0	%
Outstanding Shares of Common Stock		73,042,764			79,947,066

Input	February 22, 2013			June 30, 2013
Stock Price	$	0.10		$	0.11
Exercise Price	$	0.20		$	0.20
Expected Life (in years)		5.00			5.0
Stock Volatility		110	%		110	%
Risk-Free Rate		1.158	%		1.633	%
Number of Steps		100,000			100,000

Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]

Input	December 31, 2013
Stock Price	$	0.04
Exercise Price	$	0.08
Expected Life (in years)		4.72
Stock Volatility		100	%
Risk-Free Rate		1.61	%
Number of Steps		100,000

Input	December 31, 2013
Stock Price (simulated)	$	0.04
Exercise Price	$	0.08
Expected Life (in years)		0.463
Stock Volatility		100	%
Risk-Free Rate		0.10	%
Number of Steps		10,000

September 2013 SPA Option [Member] | Monte Carlo Simulation Model [Member]

Note 11 - Fair Value Measures (Tables) [Line Items]

Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]

Input	December 31, 2013
Stock Price	$	0.04
Exercise Price	$	0.06
Expected Life (in years)		0.463
Stock Volatility		100	%
Risk-Free Rate		0.10	%
Dividend Rate		0	%
Outstanding Shares of Common Stock		160,664,862

Black-Sholes-Merton Option Pricing Model [Member] | Warrant [Member]

Note 11 - Fair Value Measures (Tables) [Line Items]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Input	February 22, 2013			June 30, 2013			December 31, 2013
Stock Price	$	0.14		$	0.10		$	0.04
Exercise Price	$	0.15		$	0.098		$	0.098
Expected Life (in years)		3.00			2.65			2.15
Stock Volatility		100	%		100	%		95	%
Risk-Free Rate		0.40	%		0.31	%		0.21	%
Dividend Rate		0	%		0	%		0	%
Outstanding Shares of Common Stock		59,576,097			66,480,399			160,664,862

Input	February 22, 2013			June 30, 2013			December 31, 2013
Stock Price	$	0.14		$	0.10		$	0.04
Exercise Price	$	0.15		$	0.098		$	0.098
Expected Life (in years)		4.38			4.01			3.50
Stock Volatility		100	%		100	%		100	%
Risk-Free Rate		0.70	%		1.04	%		1.02	%
Dividend Rate		0	%		0	%		0	%
Outstanding Shares of Common Stock		59,576,097			66,480,399			160,664,862

Black-Sholes-Merton Option Pricing Model [Member] | Third Tranche Warrants [Member]

Note 11 - Fair Value Measures (Tables) [Line Items]

Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]

Input	January 16, 2013
Stock Price	$	0.15
Exercise Price	$	0.15
Expected Life (in years)		5
Stock Volatility		110	%
Risk-Free Rate		0.75	%
Dividend Rate		0
Outstanding Shares of Common Stock		32,434,430

Monte Carlo Simulation Model [Member] | February 2013 Warrants [Member]

Note 11 - Fair Value Measures (Tables) [Line Items]

Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]

Input	February 22, 2013			June 30, 2013			December 31, 2013
Stock Price	$	0.12		$	0.09		$	0.04
Exercise Price	$	0.20		$	0.20		$	0.08
Expected Life (in years)		5			4.65			4.15
Stock Volatility		110	%		110	%		100	%
Risk-Free Rate		0.84	%		1.28	%		1.34	%
Number of Steps		100,000			100,000			100,000
Outstanding Shares of Common Stock		59,576,097			66,480,399			160,664,862

2014 Warrants [Member]

Note 11 - Fair Value Measures (Tables) [Line Items]

Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]

Input	April 14, 2014			June 30, 2014
Stock Price	$	0.0375		$	0.01
Exercise Price	$	0.09		$	0.09
Expected Life (in years)		5.00			4.79
Stock Volatility		100.0	%		120.0	%

Input	May 27, 2014			June 30, 2014
Stock Price	$	0.01		$	0.01
Exercise Price	$	0.09		$	0.09
Expected Life (in years)		5.00			4.91
Stock Volatility		100.0	%		120.0	%

Proposed Merger Transaction [Member]

Note 11 - Fair Value Measures (Tables) [Line Items]

Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]

Input	June 30, 2014
Stock Price (simulated)	$	0.01
Strike Price	$	0.06
Expected remaining term (in years)		1.00
Stock Volatility		110	%
Risk-Free Rate		0.1	%
Dividend Rate		0	%
Effective discount rate		32.5	%
Probability of forced redemption or transaction event		20% - 90	%

Input	June 30, 2014
Stock Price (simulated)	$	0.01
Strike Price	$	0.06
Expected remaining term (in years)		1.00
Stock Volatility		110	%
Risk-Free Rate		0.1	%
Dividend Rate		0	%
Effective discount rate		32.5	%
Probability of forced redemption or transaction event		20% - 90	%

Input	June 30, 2014
Stock Price (simulated)	$	0.01
Strike Price	$	0.06
Expected remaining term (in years)		1.54
Stock Volatility		110	%
Risk-Free Rate		0.3	%
Dividend Rate		0.00	%
Effective discount rate		32.5	%
Probability of forced redemption or transaction event		20% - 90	%

Input	April 14, 2014			June 30, 2014
Stock Price (simulated)	$	0.0375			0.01
Strike Price	$	0.06			0.06
Expected remaining term (in years)		1.22			1.01
Stock Volatility		100	%		110.0	%
Risk-Free Rate		0.2	%		0.1	%
Dividend Rate		0.00	%		0.00	%
Effective discount rate		32.5	%		32.5	%
Probability of forced redemption or transaction event		20.0% - 50.0	%		20.0% - 90.0	%

Input	May 27, 2014			June 30, 2014
Stock Price (simulated)		0.01			0.01
Strike Price		0.06			0.06
Expected remaining term (in years)		1.64			1.54
Stock Volatility		100.0	%		110.0	%
Risk-Free Rate		0.3	%		0.3	%
Dividend Rate		0.0	%		0.0	%
Effective discount rate		32.5	%		32.5	%
Probability of forced redemption or transaction event		20.0% - 90.0	%		20.0% - 90.0	%

Convertible Notes [Member]

Note 11 - Fair Value Measures (Tables) [Line Items]

Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]

Input	February 22, 2013			June 30, 2013			December 31, 2013
Stock Price	$	0.14		$	0.10		$	0.04
Strike Price	$	0.10		$	0.10		$	0.06
Expected remaining term (in years)		2.35			2.00			1.50
Stock Volatility		100	%		100	%		95	%
Risk-Free Rate		0.32	%		0.36	%		0.25	%
Dividend Rate		0	%		0	%		0	%
Outstanding Shares of Common Stock		59,576,097			66,480,399			160,664,862
Effective discount rate		13.2	%		13.2	%		19.6	%
Probability of forced redemption		20	%		20	%		20	%

Input	February 22, 2013			March 30, 2013			December 31, 2013
Stock Price	$	0.14		$	0.10		$	0.04
Exercise Price	$	0.10		$	0.10		$	0.06
Expected remaining term (in years)		2.35			2.01			1.50
Stock Volatility		100	%		100	%		95	%
Risk-Free Rate		0.32	%		0.36	%		0.26	%
Dividend Rate		0	%		0	%		0	%
Outstanding Shares of Common Stock		59,576,097			66,480,399			160,664,862
Effective discount rate		13.2	%		13.2	%		19.6	%
Probability of forced redemption		20	%		20	%		20	%

Input	January 16, 2013			February 22, 2013			June 30, 2013			December 31, 2013
Stock Price	$	0.15		$	0.14		$	0.10		$	0.04
Exercise Price	$	0.10		$	0.10		$	0.10		$	0.06
Expected remaining term (in years)		3			2.90			2.55			2.04
Stock Volatility		100	%		100	%		100	%		95	%
Risk-Free Rate		0.36	%		0.39	%		0.52	%		0.40	%
Dividend Rate		0	%		0	%		0	%		0	%
Outstanding Shares of Common Stock		32,434,430			59,576,097			66,480,399			160,664,862
Effective discount rate		13.2	%		13.2	%		13.2	%		21.3	%
Probability of forced redemption		20	%		20	%		20	%		20	%