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Note 11 - Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Allowance for loan losses	$ 1,572	$ 1,036
Post-retirement benefits	101	46
Core deposit intangible	381	391
Unvested stock-based compensation	31	18
Limited partnership investments	8	13
Lease liability	72	67
Loan origination fees, net	328	71
Total deferred tax assets	2,493	1,642
Depreciation	663	741
Right of use asset	73	68
Unrealized gains on securities available for sale	813	192
Cash flow hedges	91	0
Total deferred tax liabilities	1,640	1,001
Net deferred tax assets	$ 853	$ 641

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