Note 1 - Organization and Nature of Business (Details Textual) - USD ($) $ / shares in Units, $ in Millions		7 Months Ended	12 Months Ended
	Sep. 15, 2021	Dec. 31, 2023	Dec. 31, 2023	Jun. 30, 2023
The September 2021 ATM [Member]
Open Market Sale Agreement, Maximum Aggregate Offering Price	$ 100.0
Open Market Sale Agreement, Sales Commission, Percentage	3.00%
Stock Issued During Period, Shares, New Issues (in shares)			1,362,220
Proceeds from Issuance of Common Stock			$ 1.5
Proceeds from Issuance of Common Stock, Net			$ 1.4
September 2021 ATM [Member]
Stock Issued During Period, Shares, New Issues (in shares)			9,781,920
Proceeds from Issuance of Common Stock			$ 19.6
Proceeds from Issuance of Common Stock, Net			$ 18.6
June 2023 Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)		16,000,000
Proceeds from Issuance of Common Stock, Net		$ 13.6
Shares Issued, Price Per Share (in dollars per share)				$ 0.868