Note 2 - Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance, beginning of the year	$ 1,523	$ 962	$ 1,525
Amounts provided	156	635	6
Amounts recovered	(92)	(86)	(505)
Amounts written off	(73)	(78)	(33)
Translation adjustments	(72)	90	(31)
Balance, end of the year	$ 1,442	$ 1,523	$ 962