Note 2 - Basis of Presentation, Principles of Consolidation, and Significant Accounting Policies and Liquidity - Schedule of Fair Value Measurements, Recurring and Nonrecurring (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Dec. 31, 2023
Warrant Liability Long Term [Member]
Balance	$ 1,704	$ 4,855
Issuances of warrants	6,111	6,111
Warrant amendment	389	389
Change in fair value - net	1,728	(1,423)
Balance	9,932	9,932
Fair Value, Recurring [Member] | Warrant Liability [Member]
Fair value of warrant liability	9,932	9,932	$ 4,855
Fair Value, Recurring [Member] | Warrant Liability [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of warrant liability	0	0	0
Fair Value, Recurring [Member] | Warrant Liability [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of warrant liability	0	0	0
Fair Value, Recurring [Member] | Warrant Liability [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of warrant liability	$ 9,932	$ 9,932	$ 4,855