Note 9 - Revenue From Contracts With Customers - Noninterest Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Deposit service charges and fees		$ 738	$ 887
Loan servicing fees	[1]	55	63
Mortgage brokerage and banking fees	[1]	12	29
Loss on disposal of other assets		0	(2)
Other	[1]	98	107
Total noninterest income		1,258	1,398
Deposit Account [Member]
Deposit service charges and fees		738	887
Bank Servicing [Member]
Deposit service charges and fees		$ 334	$ 282

[1] Not within the scope of ASC 606