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Note 2 - Going Concern and Liquidity (Details Textual) - USD ($)			1 Months Ended
	Apr. 17, 2020	Apr. 14, 2020	Apr. 30, 2020	Feb. 28, 2019	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Cash and Cash Equivalents, at Carrying Value, Ending Balance					$ 765,975	$ 1,516,272	$ 2,739,700	$ 1,996,271
Underwrite Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				141,850
Public Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)				5,715,000
Proceeds from Issuance or Sale of Equity, Total				$ 2,000,000
Subsequent Event [Member] \| Underwrite Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	356,250	2,375,000	2,375,000
Subsequent Event [Member] \| Public Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)	712,500	4,750,000	4,750,000
Proceeds from Issuance or Sale of Equity, Total	$ 4,700,000	$ 4,500,000	$ 4,700,000