Note 10 - Options and Warrants to Purchase Common Stock (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of Warrants or Rights [Table Text Block]

	December 31, 2017					December 31, 2016
	Shares issuable upon exercise of			Weighted		Shares issuable upon exercise of		Weighted
	Outstanding Warrants			Average Exercise Price		Outstanding Warrants		Average Exercise Price

Outstanding at beginning of year		3,744,623		$	0.36		461,340	$	1.15
Issued		18,193,750			0.07		3,283,283		0.25
Exercised		(3,125,000	)		0.04		--		--
Forfeited		--					--		--
Outstanding at end of year		18,813,373			0.14		3,744,623		0.36

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

		Warrants Outstanding and Exercisable
Exercise Price		Shares issuable upon exercise of Outstanding Warrants		Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price
$	1.15		461,340		3.3	$	1.15
$	0.25		3,283,283		3.5	$	0.25
$	0.04		4,068,750		4.7	$	0.04
$	0.10		11,000,000		5.0	$	0.10
			18,813,373		4.6	$	0.14

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

	201 7			201 6
Dividend Yield	0%			0%
Expected Life (in years)	2.50	–	6.27	2.00	–	9.02
Expected Volatility	114.98	–	167.28%	65.49	–	65.49%
Risk Free Interest Rate	1.38	–	2.26%	0.76	–	1.78%

Share-based Compensation, Stock Options, Activity [Table Text Block]

	December 31, 2017					December 31, 2016
				Weighted					Weighted
				Average					Average
	Shares			Exercise Price		Shares			Exercise Price

Outstanding at beginning of year		21,277,479		$	0.87		17,806,472		$	1.00
Granted		35,810,289		$	0.06		3,771,488			0.24
Exercised		--			--		--			--
Forfeited		(30,000	)				(300,481	)		0.83
Outstanding at end of year		57,057,768		$	0.36		21,277,479		$	0.87

Summary Of Vesting Information For Stock Options [Table Text Block]

	Vesting Information
Shares	Frequency	Begin Date	End Date
350,000	Immediately	05/23/2017	05/23/2017
300,000	Immediately	05/24/2017	05/24/2017
100,000	Immediately	10/01/2017	10/01/2017
140,000	Immediately	12/07/2017	12/07/2017
6,875,000	Quarterly	10/01/2017	07/01/2018
545,289	Quarterly	10/01/2017	07/01/2018
27,500,000	Performance*	12/14/2017	12/14/2027

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

Options Outstanding					Options Exercisable


	Weighted
	Average		Weighted				Weighted
	Remaining		Average				Average
	Contractual		Exercise		Number		Exercise
Number Outstanding	Life (years)		Price		Exercisable		Price

34,475,000		9.95	$	0.06		15,568,718	$	0.06
545,289		9.98	$	0.075		45,289	$	0.075
500,000		3.62	$	0.16		500,000	$	0.16
81,395		6.14	$	0.21		40,698	$	0.21
100,000		2.71	$	0.22		100,000	$	0.22
1,066,155		3.36	$	0.24		1,066,155	$	0.24
2,087,500		4.79	$	0.25		2,087,500	$	0.25
35,595		5.29	$	0.27		17,798	$	0.27
474,815		6.36	$	0.28		362,408	$	0.28
234,506		5.13	$	0.285		234,506	$	0.285
81,522		3.05	$	0.30		40,716	$	0.30
200,000		7.12	$	0.66		200,000	$	0.66
150,000		7.10	$	0.68		99,990	$	0.68
7,233,277		0.99	$	0.70		7,233,277	$	0.70
488,356		7.38	$	0.73		371,666	$	0.73
3,104,653		4.15	$	0.83		3,104,653	$	0.83
975,000		6.45	$	0.84		975,000	$	0.84
300,000		5.64	$	1.10		300,000	$	1.10
300,000		5.48	$	1.15		300,000	$	1.15
100,000		0.08	$	1.24		100,000	$	1.24
115,000		3.24	$	1.35		115,000	$	1.35
125,000		0.08	$	1.45		125,000	$	1.45
300,000		4.40	$	1.55		300,000	$	1.55
7,645		0.09	$	1.58		7,645	$	1.58
3,077,060		4.89	$	1.66		3,077,060	$	1.66
900,000		3.63	$	1.90		900,000	$	1.90
57,057,768		7.45	$	0.36		37,273,079	$	0.52

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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