Note 5 - Equity Transactions (Details Textual)				3 Months Ended
	Apr. 24, 2020 $ / shares shares	Mar. 31, 2020 $ / shares shares	May 31, 2019 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares	Mar. 31, 2019 USD ($)
Share-based Payment Arrangement, Expense | $				$ 7,220	$ 31,390
Subsequent Event [Member]
Shares Issued, Price Per Share (in dollars per share) | $ / shares	$ 0.10
Common Stock, Shares, Issued, Total (in shares) | shares	20,000,000
Warrants Issued with Units [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares			$ 0.30
Warrants Issued to Placement Agent in Connection with Private Placement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares			1,359,000
Warrants To Purchase Common Stock [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares		63,321,294		63,321,294
Warrants To Purchase Common Stock [Member] | Minimum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.25		$ 0.25
Warrants To Purchase Common Stock [Member] | Maximum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		1		1
Warrants to Purchase Units Sold in May 2016 Private Placement [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.25		$ 0.25
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares		480,000		480,000
Term of Warrant (Year)		7 years
Warrants to Purchase Units Sold in February 2017 Private Placement [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 0.35		$ 0.35
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares		164,074		164,074
Warrants to Purchase Units Sold in October 2017 Private Placement [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 100		$ 100
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares		600		600
Private Placement [Member]
Equity Units Issued During Period, Shares, New Issues (in shares) | shares			29,770,000
Shares Issued, Price Per Share (in dollars per share) | $ / shares			$ 0.25
Equity Units, Number of Common Shares in Each Unit (in shares) | shares			1
Equity Units, Number of Warrants in Each Unit			1
Proceeds from Issuance of Private Placement | $			$ 7,442,500
Payments of Stock Issuance Costs | $			452,900
Proceeds from Issuance or Sale of Equity, Net of Issuance Costs | $			$ 6,989,600