Note 9 - Fortress Preferred Equity Investment - Summary of preferred equity investment activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Conversion of Stock [Line Items]
Beginning balance	$ 73,697
Ending balance	87,288	$ 73,697
Fortress Preferred Equity Investment [Member]
Conversion of Stock [Line Items]
Beginning balance	73,697	0
Investment in preferred equity		80,000
Preferred equity return	14,641	1,392
Preferred equity payment	(4,297)
Preferred equity accretion	3,247
Ending balance	$ 87,288	73,697
Fortress Preferred Equity Investment [Member] | Embedded Derivatives [Member]
Conversion of Stock [Line Items]
Preferred equity investment activity changes		(417)
Fortress Preferred Equity Investment [Member] | Discount on Preferred Equity [Member]
Conversion of Stock [Line Items]
Preferred equity investment activity changes		(1,689)
Fortress Preferred Equity Investment [Member] | Financing Costs [Member]
Conversion of Stock [Line Items]
Preferred equity investment activity changes		$ (5,589)