Note 23 - Parent Company Condensed Financial Information - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other assets	$ 8,571	$ 1,824
	794,162	758,956
Stockholders' equity	85,844	80,938
	794,162	758,956
Parent Company [Member]
Cash and cash equivalents	2,845	1,850	$ 727	$ 461
Other assets	2,039	234
Investment in subsidiaries	80,960	78,854
	85,844	80,938
Accrued expenses
Stockholders' equity	85,844	80,938
	$ 85,844	$ 80,938