Note 6 - Stock Warrants (Details Textual) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2024	Jun. 30, 2024
Class of Warrants or Rights, Expired During Period (in shares)	12,833
Class of Warrant or Right, Outstanding (in shares)		1,901,631
Class of Warrant or Right, Intrinsic Value			$ 0
Warrants Expiring on January 28th, 2025 [Member]
Class of Warrant or Right, Outstanding (in shares)		431,250
Warrants Expiring May 7th, 2026 [Member]
Class of Warrant or Right, Outstanding (in shares)		958,334