Note 5 - Fair Value Measurements - Assets Measured on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Impaired loans	$ 8,904	$ 7,969
Fair Value, Nonrecurring [Member]
Impaired loans	1,106	4,162
Other real estate owned	6,792
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member]
Impaired loans	0	0
Other real estate owned	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member]
Impaired loans	0	0
Other real estate owned	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]
Impaired loans	1,106	$ 4,162
Other real estate owned	$ 6,792