Note 13 - Restructuring Activities - Charges and Net Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenues	$ 26,941	$ 24,261
Net loss	(1,442)	54
Total assets	50,124	49,974
Total liabilities	5,283	3,774
CHINA
Revenues	3	22
Net loss	(209)	(114)
Total assets	929	1,235
Total liabilities	79	92
Total net assets	$ 850	$ 1,143