Note 2 - Variable Interest Entities - Consolidated VIEs' Financial Performance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenues	$ 47,328	$ 38,408
Cost of revenues	47,230	37,776
Total operating expenses	13,688	6,333
Net loss before allocation to noncontrolling interests	(2,688)	(5,221)
Variable Interest Entity, Primary Beneficiary [Member]
Revenues	42,136	34,418
Cost of revenues	45,730	34,637
Total operating expenses	1,409	1,723
Net loss before allocation to noncontrolling interests	$ 5,182	$ 2,180