Note 8 - Equity Transactions (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

Warrants outstanding, December 31, 2017	20,632,331
Issued	11,559,963
Exercised	-
Expired	-
Warrants outstanding, December 31, 2018	32,192,294
Issued	31,129,000
Exercised	-
Expired	-
Warrants outstanding, December 31, 2019	63,321,294

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

Warrants Issued	Exercise Price		Expiration Date
240,000	$	0.25	April 2021
103,500	$	1.00	July 2021
156,000	$	0.50	July 2022
78,000	$	0.50	August 2022
8,100,000	$	0.25	June 2023
5,754,831	$	0.35	February 2024
6,200,000	$	0.25	October 2024
31,129,000	$	0.30	November 2024
8,040,000	$	0.25	April 2025
3,519,963	$	0.65	December 2025
63,321,294