Note 9 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	May 06, 2024	May 01, 2024	Mar. 31, 2024	Mar. 31, 2023
Subsequent Event [Line Items]
Proceeds from issuance of common stock and warrants			$ 0	$ 2,231
Payment of equity issuance costs			$ 0	$ 413
Subsequent Event [Member] | Private Placement [Member]
Subsequent Event [Line Items]
Warrants to purchase shares of common stock		922,863
Warrants exercise price of common stock Warrants		$ 6.314
Warrants and Rights Outstanding, Term (Year)		7 years
Subsequent Event [Member] | May Two Thousand Twenty Four Offering [Member]
Subsequent Event [Line Items]
Issuance of stock during period, Shares		85,100
Net cash proceeds	$ 3,600
Proceeds from issuance of common stock and warrants	4,000
Payment of equity issuance costs	$ 400
Subsequent Event [Member] | May 2024 Placement Agent Warrants [Member]
Subsequent Event [Line Items]
Warrants to purchase shares of common stock		36,914
Warrants exercise price of common stock Warrants		$ 10.727
Warrants and Rights Outstanding, Term (Year)		5 years
Subsequent Event [Member] | Unregistered Shares [Member] | May Two Thousand Twenty Four Offering [Member]
Subsequent Event [Line Items]
Shares Issued, Price Per Share		$ 6.5015
Subsequent Event [Member] | Pre Funded Warrants [Member] | Private Placement [Member]
Subsequent Event [Line Items]
Warrants to purchase shares of common stock		530,142
Common stock warrants		6.5014
Warrants exercise price of common stock Warrants		$ 0.0001