Note 2 - Variable Interest Entities - Consolidated VIEs' Financial Performance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues	$ 1,717	$ 3,239			$ 3,917	$ 13,190
Cost of revenues	(1,619)	(3,184)			(3,612)	(12,735)
Total operating expenses	251	2,047			1,719	3,670
Net loss	(108)	(1,905)	$ (1,167)	$ (1,082)	(1,275)	(2,987)
Variable Interest Entity, Primary Beneficiary [Member]
Revenues	0	539			49	9,740
Cost of revenues	(1)	(543)			(40)	(9,674)
Total operating expenses	13	(92)			(64)	(1,204)
Net loss	$ 17	$ (100)			$ (54)	$ (1,167)