Note 15 - Revenue from Contracts with Customers (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Gains (Losses) on Sales of Other Real Estate			$ 168	$ 111
Other Noninterest Expenses [Member]
Gains (Losses) on Sales of Other Real Estate	$ 48		162
Deposit Account [Member]
Revenue from Contract with Customer, Including Assessed Tax	1,134	$ 1,169	3,266	$ 3,315
Debit Card [Member]
Revenue from Contract with Customer, Including Assessed Tax	689		2,050
ATM Fees [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 84		$ 264