Note 8 - Warrants (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Jul. 03, 2023	Jun. 29, 2023	Mar. 31, 2024	Dec. 31, 2023
Preferred Stock, Par or Stated Value Per Share			$ 0.0001	$ 0.0001
Warrants Issued in Registered Direct Offering [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		6,896,553
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 1.45
Warrants and Rights Outstanding, Term		5 years
Registered Direct Offering [Member]
Proceeds from Issuance or Sale of Equity	$ 10,000
Proceeds from Issuance of Warrants	$ 7,717
Series A Preferred Stock [Member]
Preferred Stock, Convertible, Conversion Price	$ 1.45
Series A Preferred Stock [Member] | Registered Direct Offering [Member]
Stock Issued During Period, Shares, New Issues		10,000
Preferred Stock, Par or Stated Value Per Share		$ 0.0001
Preferred Stock, Stated Value Per Share		$ 1,000
Preferred Stock, Convertible, Shares Issuable		6,896,553
Preferred Stock, Convertible, Conversion Price		$ 1.45