Note 2 - Variable Interest Entities - Consolidated VIEs' Financial Performance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues	$ 3,531	$ 6,316
Cost of revenues	3,459	6,630
Total operating expenses	994	998
Net loss	(850)	(1,143)
Variable Interest Entity, Primary Beneficiary [Member]
Revenues	3,531	6,148
Cost of revenues	(3,459)	(6,327)
Total operating expenses	(497)	(370)
Net loss	$ (444)	$ (550)