Note 4 - Restructuring Activities - Charges and Net Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Revenues	$ 6,382	$ 4,957
Net (loss) income	(739)	281
Total assets	46,709		$ 48,797
Total liabilities	5,271		6,842
CHINA
Revenues	0	0
Net (loss) income	(18)	$ (13)
Total assets	794		788
Total liabilities	89		84
Total net assets	$ 705		$ 704