Note 11 - Warrant Liability (Details Textual) - USD ($)	Mar. 31, 2023	Nov. 10, 2022	Sep. 09, 2022	Jan. 31, 2022	Dec. 31, 2021
September 2022 Warrants [Member]
Warrants and Rights Outstanding		$ 500,000	$ 1,400,000
The November 2021 Warrants [Member]
Warrants and Rights Outstanding		$ 1,300,000		$ 7,500,000	$ 9,600,000
The Amended November 2021 Warrants [Member]
Warrants and Rights Outstanding			$ 3.5
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			803,574
Amended July 2020 Warrants [Member]
Warrants and Rights Outstanding	$ 100,000		$ 300,000
Class of Warrant or Right, Outstanding, Accounting for Subsequent Stock Split (in shares)			77,145