Note 2 - Variable Interest Entities - Consolidated VIEs' Financial Performance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenues	$ 30,585	$ 26,235
Cost of revenues	31,021	26,429
Total operating expenses	5,576	10,925
Net loss before allocation to noncontrolling interests	(5,974)	(9,791)
Variable Interest Entity, Primary Beneficiary [Member]
Revenues	30,365	24,188
Cost of revenues	30,087	25,599
Total operating expenses	1,330	3,117
Net loss before allocation to noncontrolling interests	$ 1,296	$ 4,873