Note 11 - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets
Allowance for loan losses	$ 2,273	$ 2,076
Non-accrual interest income	39	54
Deferred rent	71	0
Deferred revenue	46	71
Incurred but not reported medical expense	34	31
Bonus	154	218
Other	90	33
Total deferred tax assets	2,707	2,483
Deferred tax liabilities
Deferred loan costs	419	369
Depreciation	406	289
Mortgage servicing rights	112	92
Net unrealized holding gains on investment securities available-for-sale	1,502	68
Fair value adjustment on equity securities	19	32
Prepaid expenses	166	151
Deferred rent	0	23
Other	17	18
Total deferred tax liabilities	2,641	1,042
Net deferred tax asset	$ 66	$ 1,441