Note 9 - Goodwill and Other Intangible Assets - Summary of Core Deposit Intangible Asset (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Gross Carrying Amount	$ 2,762	$ 2,762
Acquisitions	6,441
Less: Accumulated Amortization	(1,318)	(759)
Net Carrying Amount	$ 7,885	$ 2,003