Note 9 - Revenue Recognition - Noninterest Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Noninterest Income (in-scope of Topic 606)	$ 1,278	$ 1,513	$ 2,737	$ 2,997
Noninterest Income (out-of-scope of Topic 606)	467	343	1,143	1,348
Total noninterest income	1,745	1,856	3,880	4,345
Deposit Account [Member]
Noninterest Income (in-scope of Topic 606)	377	607	959	1,197
Product and Service, Other [Member]
Noninterest Income (in-scope of Topic 606)	37	51	76	103
Credit and Debit Card [Member]
Noninterest Income (in-scope of Topic 606)	386	356	692	665
Fiduciary and Trust [Member]
Noninterest Income (in-scope of Topic 606)	387	371	821	768
Insurance and Investment [Member]
Noninterest Income (in-scope of Topic 606)	$ 91	$ 128	$ 189	$ 264