Note 17 - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Beginning Balance	$ 851	$ 1,582	$ 1,404
Additions based on tax positions related to the current year	431	159	181
Decreases related to prior years’ tax positions	(1)	(890)	(3)
Ending Balance	$ 1,281	$ 851	$ 1,582