Note 8 - Goodwill - Changes in the Carrying Value of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance	$ 8,413	$ 7,694
Effect of foreign currency adjustments	(632)	719
Acquisitions	0	42,520
Impairment	0	(42,520)	$ 0
Balance	$ 7,781	$ 8,413	$ 7,694

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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