Note 7 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Preferred Stock [Table Text Block]

	December 31, 2019				December 31, 2018
			Carrying				Carrying
	Shares		Value		Shares		Value
Series B Convertible Preferred Stock		100	$	76,095		100	$	76,095
Series C Convertible Preferred Stock		-		-		2,150		705,238
Series E Convertible Preferred Stock		-		-		1,200		1,190,000
Series H Convertible Preferred Stock		1,686		1,156,338		-		-
Series I Convertible Preferred Stock		700		700,000		-		-
Total		2,486	$	1,932,433		3,450	$	1,971,333

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

	2019		2018
Weighted average risk-free interest rates		N/A		2.79	%
Expected dividend yield		N/A		0.0	%
Expected life of option (yrs)		N/A		7.0
Expected volatility		N/A		71.34	%

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

	Expiration Date	Exercise Price		Number of Warrants
Series G	September 2021	$	25,440		48
Series H	December 2021		1.15		217,392
Series I	Aug-Dec 2024		15,000		48