Note 12 - Subsequent Events (Details Textual) - The September 2021 ATM [Member] - USD ($) $ in Millions	9 Months Ended	37 Months Ended
	Sep. 30, 2024	Oct. 18, 2024
Stock Issued During Period, Shares, New Issues (in shares)	7,719,641	17,501,561
Proceeds from Issuance or Sale of Equity	$ 9.1	$ 28.6