Note 13 - Subsequent Events (Details Textual) - USD ($)	Jul. 25, 2024	Jun. 30, 2024	Dec. 31, 2023
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 20.97	$ 21.52
The February 2021, June 2021, and May 2022 Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 14
Subsequent Event [Member] | The February 2021, June 2021, and May 2022 Warrants [Member]
Class of Warrant or Right Exercised During Period (in shares)	958,117
Class of Warrant or Right, Exercised During Period, Exercise Price (in dollars per share)	$ 1.32
Proceeds from Warrant Exercises	$ 1,260,000
Subsequent Event [Member] | Series A Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	958,117
Warrants and Rights Outstanding, Term (Year)	5 years
Subsequent Event [Member] | Series B Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	958,117
Warrants and Rights Outstanding, Term (Year)	18 months
Subsequent Event [Member] | Series A and Series B Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 1.07
Subsequent Event [Member] | Placement Agent Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 1.65
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	67,068
Warrants and Rights Outstanding, Term (Year)	5 years
Warrants or Rights, Commissions, Percent	7.00%
Warrants or Rights, Management Fee, Percent	1.00%
Warrants or Rights, Issuance Expenses	$ 35,000
Warrants or Rights, Clearing Fees	$ 15,950
Warrants or Rights, Placement Agent Fee, Percent	7.00%