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Note 12 - Fair Value Measurements - Carrying Values and Estimated Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial Assets
Debt Securities, Available-for-sale, Total	$ 114,568	$ 99,857	[1]
Debt Securities, Held-to-maturity, Total	18,222
Restricted securities	1,806	1,688	[1]
Bank owned life insurance	17,324	13,991	[1]
Reported Value Measurement [Member]
Financial Assets
Cash and short-term investments	30,373	28,618
Debt Securities, Available-for-sale, Total	114,568	99,857
Debt Securities, Held-to-maturity, Total	18,222	43,408
Restricted securities	1,806	1,688
Loans held for sale	1,098	419
Loans, net	566,341	537,847
Bank owned life insurance	17,324	13,991
Accrued interest receivable	2,053	2,113
Financial Liabilities
Deposits	685,621	670,566
Subordinated debt	4,978	4,965
Junior subordinated debt	9,279	9,279
Accrued interest payable	184	139
Estimate of Fair Value Measurement [Member]
Financial Assets
Cash and short-term investments	30,373	28,618
Debt Securities, Available-for-sale, Total	114,568	99,857
Debt Securities, Held-to-maturity, Total	18,259	42,394
Restricted securities	1,806	1,688
Loans held for sale	1,098	419
Loans, net	573,697	528,643
Bank owned life insurance	17,324	13,991
Accrued interest receivable	2,053	2,113
Financial Liabilities
Deposits	684,800	668,567
Subordinated debt	5,335	5,035
Junior subordinated debt	9,391	7,952
Accrued interest payable	184	139
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets
Cash and short-term investments	30,373	28,618
Debt Securities, Available-for-sale, Total
Debt Securities, Held-to-maturity, Total
Restricted securities
Loans held for sale
Loans, net
Bank owned life insurance
Accrued interest receivable
Financial Liabilities
Deposits
Subordinated debt
Junior subordinated debt
Accrued interest payable
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets
Cash and short-term investments
Debt Securities, Available-for-sale, Total	114,568	99,857
Debt Securities, Held-to-maturity, Total	16,739	40,885
Restricted securities	1,806	1,688
Loans held for sale	1,098	419
Loans, net
Bank owned life insurance	17,324	13,991
Accrued interest receivable	2,053	2,113
Financial Liabilities
Deposits	565,844	551,347
Subordinated debt
Junior subordinated debt
Accrued interest payable	184	139
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets
Cash and short-term investments
Debt Securities, Available-for-sale, Total
Debt Securities, Held-to-maturity, Total	1,520	1,509
Restricted securities
Loans held for sale
Loans, net	573,697	528,643
Bank owned life insurance
Accrued interest receivable
Financial Liabilities
Deposits	118,956	117,220
Subordinated debt	5,335	5,035
Junior subordinated debt	9,391	7,952
Accrued interest payable
[1] Derived from audited consolidated financial statements.

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- Definition

The fair value portion of accrued interest payable.

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No definition available.

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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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 210
-Section S99
-Paragraph 1
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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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Amount of investment in debt security measured at amortized cost (held-to-maturity).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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.

+ References

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-Name Accounting Standards Codification
-Topic 210
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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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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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