Note 12 - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Balance-beginning of year	$ 12,580	$ 28,673
Acquisitions	1,244
Increases based on tax positions of the current year	453	393
Decrease due to tax authority settlements		(10,457)
Decreases due to lapse of statute	(3,225)	(5,118)
Increases based on tax positions of the prior years	95	156
Decreases based on tax positions of the prior years	(670)	(1,065)
Currency translation adjustments	477
Currency translation adjustments		(2)
Balance-end of year	$ 10,954	$ 12,580

Amount of unrecognized tax benefits.

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