Note 2 - Variable Interest Entities - Consolidated VIEs' Financial Performance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenues	$ 26,235	$ 47,328
Cost of revenues	26,429	47,230
Total operating expenses	10,925	13,688
Net loss before allocation to noncontrolling interests	(9,791)	(2,688)
Variable Interest Entity, Primary Beneficiary [Member]
Revenues	24,188	42,136
Cost of revenues	25,599	45,730
Total operating expenses	3,117	1,409
Net loss before allocation to noncontrolling interests	$ 4,873	$ 5,182