Note 3 - Investments in Related Parties - Income Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Total revenue	$ 2,699	$ 1,941
Net loss	(7)	(838)
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Total revenue	5,243	4,949
Total expense	8,713	7,512
Net loss	$ (3,470)	$ (2,563)