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Note 11 - Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Allowance for loan losses	$ 1,036	$ 1,052
Unrealized losses on securities available for sale		481
Post-retirement benefits	46
Core deposit intangible	391	371
Unvested stock-based compensation	18	14
Limited partnership investments	13	14
Lease liability	67
Loan origination fees, net	71	58
Total deferred tax assets	1,642	1,990
Depreciation	741	682
Right of use asset	68
Discount accretion		1
Unrealized gains on securities available for sale	192
Total deferred tax liabilities	1,001	683
Net deferred tax assets	$ 641	$ 1,307

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