Note 4 - Restructuring Activities - Charges and Net Assets (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2026	Jun. 30, 2026	Mar. 31, 2026	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Revenues	$ 8,676			$ 7,490			$ 21,241	$ 19,430
Net (loss) income	(267)	$ (1,230)	$ (1,355)	303	$ (689)	$ (739)	(2,852)	(1,125)
Total assets	43,031						43,031		$ 47,179
Total liabilities	5,880						5,880		7,247
CHINA
Revenues	0			0			14	0
Net (loss) income	(16)			$ (12)			(38)	$ (42)
Total assets	754						754		767
Total liabilities	78						78		83
Total net assets	$ 676						$ 676		$ 684