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Note 12 - Fair Value Measurements - Carrying Values and Estimated Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair value, available for sale securities	$ 117,132	$ 120,983	[1]
Securities held to maturity	15,101
Restricted securities	1,848	1,806	[1]
Bank owned life insurance	17,792	17,447	[1]
Reported Value Measurement [Member]
Cash and short-term investments	122,206	45,785
Fair value, available for sale securities	117,132	120,983
Securities held to maturity	15,101	17,627
Restricted securities	1,848	1,806
Loans, net	640,591	569,412
Bank owned life insurance	17,792	17,447
Accrued interest receivable	3,156	2,065
Derivatives - cash flow hedges	134
Deposits	838,395	706,442
Subordinated debt	9,987	4,983
Junior subordinated debt	9,279	9,279
Accrued interest payable	210	184
Loans held for sale		167
Estimate of Fair Value Measurement [Member]
Cash and short-term investments	122,206	45,785
Fair value, available for sale securities	117,132	120,983
Securities held to maturity	15,638	17,646
Restricted securities	1,848	1,806
Loans, net	650,423	572,910
Bank owned life insurance	17,792	17,447
Accrued interest receivable	3,156	2,065
Derivatives - cash flow hedges	134
Deposits	839,500	705,949
Subordinated debt	10,151	5,023
Junior subordinated debt	9,835	9,724
Accrued interest payable	210	184
Loans held for sale		167
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and short-term investments	122,206	45,785
Fair value, available for sale securities	0	0
Securities held to maturity	0	0
Restricted securities	0	0
Loans, net	0	0
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Derivatives - cash flow hedges	0
Deposits	0	0
Subordinated debt	0	0
Junior subordinated debt	0	0
Accrued interest payable	0	0
Loans held for sale		0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Cash and short-term investments	0	0
Fair value, available for sale securities	117,132	120,983
Securities held to maturity	14,053	16,134
Restricted securities	1,848	1,806
Loans, net	0	0
Bank owned life insurance	17,792	17,447
Accrued interest receivable	3,156	2,065
Derivatives - cash flow hedges	134
Deposits	736,750	588,878
Subordinated debt	0	0
Junior subordinated debt	0	0
Accrued interest payable	210	184
Loans held for sale		167
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Cash and short-term investments	0	0
Fair value, available for sale securities	0	0
Securities held to maturity	1,585	1,512
Restricted securities	0	0
Loans, net	650,423	572,910
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Derivatives - cash flow hedges	0
Deposits	102,750	117,071
Subordinated debt	10,151	5,023
Junior subordinated debt	9,835	9,724
Accrued interest payable	$ 0	0
Loans held for sale		$ 0
[1] Derived from audited consolidated financial statements.

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The fair value portion of accrued interest payable.

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Fair value of junior subordinated debt which has a lower priority of repayment than subordinated debt in the event the company falls into liquidation or bankruptcy.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Amount of investment in debt security measured at amortized cost (held-to-maturity).

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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

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