Note 8 - Revenue Recognition - Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Noninterest Income (in-scope of Topic 606)	$ 1,795	$ 1,590	$ 5,271	$ 4,915
Noninterest Income (out-of-scope of Topic 606)	345	402	1,272	1,352
Total noninterest income	2,140	1,992	6,543	6,267
Deposit Account [Member]
Noninterest Income (in-scope of Topic 606)	661	548	1,826	1,488
Product and Service, Other [Member]
Noninterest Income (in-scope of Topic 606)	51	50	157	134
Credit and Debit Card [Member]
Noninterest Income (in-scope of Topic 606)	448	460	1,423	1,373
Fiduciary and Trust [Member]
Noninterest Income (in-scope of Topic 606)	492	433	1,374	1,282
Insurance and Investment [Member]
Noninterest Income (in-scope of Topic 606)	$ 143	$ 99	$ 491	$ 638