Note 13 - Restructuring Activities - Charges and Net Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenues	$ 27,081	$ 26,941
Net loss	(1,538)	(1,442)
Total assets	50,388	50,124
Total liabilities	6,674	5,283
CHINA
Revenues	2	3
Net loss	(50)	(209)
Total assets	846	929
Total liabilities	67	79
Total net assets	$ 779	$ 850