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Note 8 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Jun. 30, 2023	Dec. 31, 2024	Dec. 31, 2023
Proceeds from Issuance of Common Stock			$ 18,113	$ 3,126
At The Market [Member]
Stock Issued During Period, Shares, New Issues (in shares)	9,790,577	951,873
Shares Issued, Price Per Share	$ 1.85	$ 3.28
Proceeds from Issuance of Common Stock	$ 18,100	$ 3,100
Proceeds from Issuance of Common Stock, Net	$ 17,600	$ 3,000

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Amount of cash inflow from the issuance of common stock, net of issuance costs.

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