Note 13 - Accumulated Other Comprehensive Loss - Unrealized Gains (Losses) of Accumulated Other Comprehensive Losses (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Before tax
Tax effect
Net of tax
Net unrealized losses during the period, before tax	(10,725)
Net unrealized losses during the period, tax effect	(2,882)
Net unrealized losses during the period, net of tax	(7,843)
Reclassification adjustment for losses, before tax	4,204
Reclassification adjustment for losses, tax effect	1,130
Reclassification adjustment for losses, net of tax	3,074
Before tax	(6,521)
Tax effect	1,752
Net of tax	$ (4,769)