Note 2 - Variable Interest Entities - Consolidated VIEs' Financial Performance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenues	$ 1,652	$ 3,531
Cost of revenues	(1,492)	(3,459)
Total operating expenses	739	994
Net loss	(530)	(850)
Variable Interest Entity, Primary Beneficiary [Member]
Revenues	49	9,909
Cost of revenues	39	9,842
Total operating expenses	36	2,036
Net loss	$ 29	$ 2,301