Note 10 - Warrants (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Jun. 29, 2023	Dec. 31, 2023	Jul. 03, 2023	Dec. 31, 2022
Preferred Stock, Par or Stated Value Per Share (in dollars 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 (in shares)	6,896,553
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 1.45
Warrants and Rights Outstanding, Term (Year)		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 (in dollars per share)			$ 1.45
Series A Preferred Stock [Member] | Registered Direct Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)	10,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.0001
Preferred Stock, Stated Value Per Share (in dollars per share)	$ 1,000
Preferred Stock, Convertible, Shares Issuable (in shares)	6,896,553
Preferred Stock, Convertible, Conversion Price (in dollars per share)	$ 1.45