Note 10 - Acquisition - Pro Forma Revenue and Earnings (Details) - Merchants Holding Company [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019		Mar. 31, 2018
Net interest income	$ 13,199		$ 12,674
Net income	$ 2,269	[1]	$ 3,592

[1] Net income for the three months ended March 31, 2019 includes acquisition-related costs of $1.9 million.