Note 8 - Stockholders' Equity (Deficit) (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Oct. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2019
Proceeds from Issuance of Private Placement		$ 3,160,000	$ 2,328,000
Class of Warrant or Right, Outstanding		3,422,099
Warrants in Connection with Securities Purchase Agreement [Member]
Class of Warrant or Right, Expiration Term	5 years		3 years
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 4		$ 5	$ 4.50
Class of Warrant or Right, Outstanding		468,200
Warrants in Connection with the Private Placement [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 4
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	909,209
Directors and Officers [Member]
Proceeds from Issuance of Private Placement	$ 240,000		$ 125,000
Private Placement [Member]
Stock Issued During Period, Shares, New Issues	909,209		468,200
Proceeds from Issuance of Private Placement	$ 3,200,000		$ 2,300,000