Note 14 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Income Tax Expense (Benefit), Total	$ 3,013	$ 1,444	$ 4,486	$ 394
Effective Income Tax Rate Reconciliation, Percent, Total	24.20%	12.50%	24.30%		10.40%
Deferred Tax Assets, Valuation Allowance, Total	$ 0		$ 0		$ 0