Note 9 - Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current	$ 2,144	$ 10,947	$ 8,930
Deferred	1,328	(1,596)	847
Total	3,472	9,351	9,777
Current	882	387	409
Deferred	(178)	704	(18)
Total	704	1,091	391
Current	204	837	634
Deferred	282	61	36
Total	486	898	670
Total	$ 4,662	$ 11,340	$ 10,838