Note 4 - Summary of Significant Accounting Policies - Contract liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance	$ 739	$ 1,245
Exchange translation adjustment	(10)	(105)
Revenue recognized from beginning contract liability balance	(670)	(1,104)
Advances received from customers related to unsatisfied performance obligations	784	703
Balance	$ 843	$ 739