Note 11 - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets
Allowance for loan losses	$ 2,349	$ 2,273
Net unrealized holding losses on investment securities available-for-sale	994	0
Non-accrual interest income	32	39
Leasing liability	788	965
Deferred revenue	23	46
Incurred but not reported medical expense	31	34
Bonus	248	154
Other	54	90
Total deferred tax assets	4,519	3,601
Deferred tax liabilities
Deferred loan income	430	419
Depreciation	295	406
Mortgage servicing rights	110	112
Net unrealized holding gains on investment securities available-for-sale	0	1,502
Fair value adjustment on equity securities	286	19
Prepaid expenses	214	166
Right of use asset	719	894
Other	16	17
Total deferred tax liabilities	2,070	3,535
Net deferred tax asset	$ 2,449	$ 66