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Note 8 - Common Stock (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2015

Dec. 31, 2014

Notes Tables

Schedule of Share-based Compensation, Activity [Table Text Block]

		Number of Shares				Weighted Average Exercise Price
Outstanding at December 31, 2014			1,183,100			$	3.50
Granted			26,400				0.15
Exercised			--				--
Forfeited or expired			(32,000	)			0.94
Outstanding at June 30, 2015			1,177,500			$	3.49
Exercisable at June 30, 2015			756,094			$	5.25

		Number of Shares				Weighted- Average Exercise Price				Weighted- Average Remaining Contractual Term (yrs)				Aggregate Intrinsic Value
Outstanding at December 31, 2013			1,197,044			$	3.79
Granted			217,500				0.17
Exercised			-				-
Forfeited or expired			(231,444	)			1.89
Outstanding at December 31, 2014			1,183,100			$	3.50				6.6			$	-0-
Exercisable at December 31, 2014			785,594			$	5.09				5.2			$	-0-

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

		Number of Shares				Weighted Average Exercise Price
Outstanding at December 31, 2014			5,108,826			$	0.66
Issued – Series D Warrants (1)			16,666,666				0.17
Issued – Series E Warrants (1)			16,666,666				0.14
Issued – Series F Warrants (1)			16,666,666				0.17
Issued – Placement Agent Warrants (1)			1,333,333				0.17
Outstanding at June 30, 2015			56,442,157			$	0.20
Exercisable at June 30, 2015			39,775,491			$	0.21

Expiration Date		Number of Shares				Weighted Average Exercise Price
December 31, 2016			1,806,159			$	1.00
January 16, 2017			45,000				1.00
January 31, 2017			567,001				1.00
March 21, 2017			2,690,666				0.35
Total Outstanding at December 31, 2014			5,108,826			$	0.66

Schedule of Stock by Class [Table Text Block]

Series B Convertible Preferred Stock			285,714
Series C Convertible Preferred Stock			21,126,760
Common Stock Purchase Warrants			56,442,157
Equity Incentive Plans			1,197,529
Total			79,052,160

Stock Purchase Warrants			5,108,826
Stock Option Plan			1,197,529
Series B Convertible Preferred Stock			285,715
Total			6,592,070

X

- Definition

Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value.

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