Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Fair Value Measurements (Details Textual)

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Note 4 - Fair Value Measurements (Details Textual) - $ / shares
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 1.55 $ 1.32 $ 3.30
October 2022 Warrants [Member]      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 1.55