Note 9 - Stockholders' Equity and Common Stock Warrants (Details Textual) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended
	Feb. 26, 2024	Jul. 31, 2023	Dec. 31, 2022
Stock Issued During Period, Shares, New Issues	495,959	63,422
Shares Issued, Price Per Share		$ 12.78
Proceeds from Issuance of Common Stock		$ 0.8
Class of Warrant or Right, Exercised	495,995
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	36
Sales Agreement [Member]
Share Sales Agreement, Maximum Amount			$ 20.0