Note 21 - Revenue Recognition - Noninterest Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Noninterest income (in-scope of Topic 606)		$ 3,603	$ 3,376
Noninterest income (out-of-scope of Topic 606)		788	832
Total noninterest income		4,391	4,208
Maintenance Fees [Member]
Noninterest income (in-scope of Topic 606)		190	160
Overdraft Fees [Member]
Noninterest income (in-scope of Topic 606)		1,657	1,587
Other Fees [Member]
Noninterest income (in-scope of Topic 606)		310	285
Electronic Banking Fees [Member]
Noninterest income (in-scope of Topic 606)	[1]	$ 1,446	$ 1,344

[1] included in other noninterest income on the consolidated statements of income