Note 23 - Parent Company Condensed Financial Information - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other assets	$ 7,206	$ 8,571
	827,496	794,162
Stockholders' equity	98,836	85,844
	827,496	794,162
Parent Company [Member]
Cash and cash equivalents	3,847	2,845	$ 1,850	$ 727
Other assets	2,110	2,039
Investment in subsidiaries	92,879	80,960
	98,836	85,844
Accrued expenses
Stockholders' equity	98,836	85,844
	$ 98,836	$ 85,844