Note 8 - Revenue Recognition - Noninterest Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Noninterest Income (in-scope of Topic 606)		$ 1,708	$ 1,757
Noninterest income (out-of-scope of Topic 606)		583	577
Total noninterest income		2,291	2,334
Deposit Account [Member]
Noninterest Income (in-scope of Topic 606)		562	469
Product and Service, Other [Member]
Noninterest Income (in-scope of Topic 606)		55	41
Credit and Debit Card [Member]
Noninterest Income (in-scope of Topic 606)		440	434
Fiduciary and Trust [Member]
Noninterest Income (in-scope of Topic 606)		443	415
Insurance and Investment [Member]
Noninterest Income (in-scope of Topic 606)	[1]	$ 208	$ 398

[1] Included within Other Income on the Consolidated Statements of Income