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Note 8 - Common Stock (Tables)

12 Months Ended

Dec. 31, 2018

Share-based Compensation, Activity [Table Text Block]

	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (yrs)		Aggregate Intrinsic Value
Outstanding at December 31, 2017		7,024,275		$	0.29
Granted		7,930,000			0.03
Exercised		-			-
Forfeited or expired		(235,000	)		2.96
Outstanding at December 31, 2018		14,719,275		$	0.11		9.0	$	-0-
Exercisable at December 31, 2018		6,795,277		$	0.19		8.3	$	-0-

Schedule of Warrant Activity [Table Text Block]

	Number of Shares		Weighted Average Exercise Price
Outstanding at December 31, 2017		-	$	-
Issued		57,348,383		0.03
Exercised		-		-
Forfeited or expired		-		-
Outstanding and exercisable at December 31, 2018		57,348,383	$	0.03

Schedule of Stock by Class [Table Text Block]

Stock Option Plans			17,412,300
Stock Purchase Warrants			57,348,383
Series B Convertible Preferred Stock			285,714
Series C Convertible Preferred Stock			143,349,733
Series E Convertible Preferred Stock			47,169,812
Total			265,565,942

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

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+ Details