Note 14 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Proceeds from Issuance of Common Stock		$ 3,126	$ 76,237
Open Market Sale Agreement [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues	9,790,577
Shares Issued, Price Per Share	$ 1.85
Proceeds from Issuance of Common Stock	$ 18,100
Proceeds from Issuance of Common Stock, Net	$ 17,600