Note 2 - Variable Interest Entities - Consolidated VIEs' Financial Performance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenues	$ 15,439	$ 30,585
Cost of revenues	14,993	31,021
Total operating expenses	4,203	5,576
Net loss before allocation to noncontrolling interests	(3,769)	(5,974)
Variable Interest Entity, Primary Beneficiary [Member]
Revenues	9,909	30,365
Cost of revenues	9,842	30,087
Total operating expenses	2,036	1,330
Net loss before allocation to noncontrolling interests	$ 2,301	$ 1,296