Note 6 - Other Comprehensive Income (Loss) - Components of Other Comprehensive (Loss) Income and Related Tax Effects (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Other comprehensive income (loss), before tax	$ 1,770	$ 671
Other comprehensive income (loss), tax	495	187
Other comprehensive income, net of tax	$ 1,275	$ 484

Amount after tax of other comprehensive income (loss) attributable to parent entity.

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