Note 16 - Fair Value Measurements - Assets Recorded at Fair Value on Non-recurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Real estate owned	$ 145	$ 148
Impaired mortgage servicing rights		0
Fair Value, Inputs, Level 1 [Member]
Real estate owned	0	0
Impaired mortgage servicing rights		0
Fair Value, Inputs, Level 2 [Member]
Real estate owned	0	0
Impaired mortgage servicing rights		0
Fair Value, Inputs, Level 3 [Member]
Real estate owned	$ 145	148
Impaired mortgage servicing rights		$ 0