Note 4 - Warrants and Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended		9 Months Ended
	Mar. 31, 2024	Aug. 31, 2024	Mar. 31, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Oct. 31, 2024	Dec. 31, 2023	Dec. 26, 2023
Proceeds from Issuance or Sale of Equity						$ 4,660	$ 211
Loss On Issuance of Warrant Liabilities				$ (847)	$ 0	(847)	0
Warrant Liabilities, Transaction Costs				993	$ (0)	$ 993	$ (0)
Stock Issued During Period, Shares, Issued for Services (in shares)			6,834
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)						20,485
Warrant Liability [Member]
Derivative Liability		$ 6,100
Pre-funded Warrants in 2024 Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		2,183,368
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 0.001
Series A Warrants in 2024 Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		2,466,368
Series B Warrants in 2024 Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		2,466,368
Common Warrants in 2024 Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		2.23
Common Warrants Issued In Connection With The 2023 Securities Purchase Agreement[Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)										$ 9.6
Common Warrants Issued In Connection With The 2023 Securities Purchase Agreement[Member] | Subsequent Event [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)								895,834
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)								$ 2.23
Warrants and Rights Outstanding, Term (Year)								5 years
Securities Purchase Agreement 2024 [Member]
Loss On Issuance of Warrant Liabilities		$ 800
Warrant Liabilities, Transaction Costs				$ 1,000		$ 1,000
Equity Classified Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	3,334		3,334
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 9.15		$ 9.15
Warrants and Rights Outstanding, Term (Year)	10 years		10 years
Class of Warrant or Right, Vesting Period (Year)	4 years
Class of Warrant or Right, Outstanding (in shares)				2,089,105		2,089,105			289,276
Class of Warrant or Right, Vested and Exercisable (in shares)				2,066,894		2,066,894			266,350
Common Stock in 2024 Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)		283,000
Securities Purchase Agreement 2024 [Member]
Equity Issued, Purchase Price Per Share (in dollars per share)		$ 2.23
Proceeds from Issuance or Sale of Equity		$ 5,500