Note 6 - Warrants (Details Textual) - USD ($)	1 Months Ended	3 Months Ended
	Jul. 31, 2017	Mar. 31, 2020	Mar. 31, 2019	Feb. 25, 2020
Share Price (in dollars per share)		$ 0.16		$ 0.21
Class of Warrant or Right, Issued During Period (in shares)		791,260	3,861,041
Deemed Dividends		$ 100,000	$ 342,000
Warrants Issued Concurrently With One Year Convertible Note [Member]
Class of Warrant or Right, Issued During Period (in shares)	400,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.65	$ 0.13
Class of Warrant or Right, Increase Shares Available for Purchase (in shares)		791,260
Deemed Dividends		$ 100,000