Note 7 - Other Assets - Summary of Major Components of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash surrender value of life insurance other than BOLI	$ 15,029	$ 16,213
Net deferred tax asset	10,193	9,206
Investments in income tax credit related ventures	4,537	3,216
Prepaid assets	3,072	2,856
Other short term receivables	1,939	2,215
Core deposit intangible	1,057	1,225
Mortgage servicing rights (MSRs)	1,022	875	$ 921
OREO and other foreclosed property	1,018	2,640
Goodwill, Ending Balance	682	682
Other	8,362	9,378
Total	$ 46,911	$ 48,506