Note 12 - Income Taxes - Tax Effects of Temporary Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for loan losses	$ 2,182	$ 2,005
Funded status of pension plan	1,348	1,516
Deferred compensation	476	444
Lease liability	349	326
Accrued incentive compensation	146	60
Stock compensation	111	105
Securities impairment	70	70
Nonaccrual loan interest income	36	48
Net unrealized loss on securities	28	0
Other	6	15
Gross deferred tax assets	4,752	4,589
Deferred tax liabilities:
Accrued pension liability	1,055	1,036
Deferred loan fees and costs	684	519
Depreciation	571	772
Intangible assets	350	305
Lease right-of-use asset	319	289
Business combination adjustments	159	188
Net unrealized gains on securities	0	593
Other	96	47
Gross deferred tax liabilities	3,234	3,749
Net deferred tax asset	$ 1,518	$ 840