Note 10 - Acquisition - Pro Forma Revenue and Earnings (Details) - Merchants Holding Company [Member] - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net interest income		$ 13,722	$ 13,492	$ 40,416	$ 39,095
Net income	[1]	$ 4,642	$ 4,371	$ 10,555	$ 11,974

[1] Net income includes acquisition-related costs of ($113) thousand and $2.2 million for the three and nine months ended September 30, 2019.