Note 9 - Long-term Investments - Summary of Long-term Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance as of January 1, 2022	$ 1,596	$ 2,280
Exchange translation adjustment	(7)	(88)
Disposed during the year	(426)	(596)
Cash investments during the year	64
Impairment on long-term investments	(433)	(596)
Balance as of December 31, 2022	$ 794	$ 1,596