Note 7 - Revenue Recognition - Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Noninterest Income (in-scope of Topic 606)	$ 1,835	$ 1,795	$ 5,370	$ 5,271
Noninterest Income (out-of-scope of Topic 606)	280	345	1,735	1,272
Total noninterest income	2,115	2,140	7,105	6,543
Deposit Account [Member]
Noninterest Income (in-scope of Topic 606)	642	661	1,871	1,826
Product and Service, Other [Member]
Noninterest Income (in-scope of Topic 606)	151	51	253	157
Credit and Debit Card [Member]
Noninterest Income (in-scope of Topic 606)	395	448	1,276	1,423
Fiduciary and Trust [Member]
Noninterest Income (in-scope of Topic 606)	505	492	1,431	1,374
Insurance and Investment [Member]
Noninterest Income (in-scope of Topic 606)	$ 142	$ 143	$ 539	$ 491