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Note 4 - Fair Value Measurements (Details) - Estimated Fair Value of the Company’s Financial Instruments (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Financial assets:
Cash and cash equivalents	$ 45,262us-gaap_CashAndCashEquivalentsAtCarryingValue	$ 25,639us-gaap_CashAndCashEquivalentsAtCarryingValue	$ 42,810us-gaap_CashAndCashEquivalentsAtCarryingValue	$ 26,193us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents	45,262us-gaap_CashAndCashEquivalentsFairValueDisclosure	25,639us-gaap_CashAndCashEquivalentsFairValueDisclosure
Investment securities available for sale, at fair value	151,159us-gaap_AvailableForSaleSecurities	154,334us-gaap_AvailableForSaleSecurities
Investment securities available for sale, at fair value	151,159us-gaap_AvailableForSaleSecurities	154,334us-gaap_AvailableForSaleSecurities
Loans held for sale	690us-gaap_LoansReceivableHeldForSaleAmount	438us-gaap_LoansReceivableHeldForSaleAmount
Loans held for sale	690us-gaap_LoansHeldForSaleFairValueDisclosure	438us-gaap_LoansHeldForSaleFairValueDisclosure
Net loans	469,371us-gaap_LoansAndLeasesReceivableNetReportedAmount	463,738us-gaap_LoansAndLeasesReceivableNetReportedAmount
Net loans	481,581us-gaap_LoansReceivableFairValueDisclosure	475,019us-gaap_LoansReceivableFairValueDisclosure
Bank-owned life insurance	9,161us-gaap_BankOwnedLifeInsurance	9,092us-gaap_BankOwnedLifeInsurance
Federal Home Loan Bank stock	1,887us-gaap_FederalHomeLoanBankStock	1,887us-gaap_FederalHomeLoanBankStock
Accrued interest receivable	2,549us-gaap_InterestReceivable	2,095us-gaap_InterestReceivable
Financial liabilities:
Deposits	617,143us-gaap_Deposits	586,112us-gaap_Deposits
Deposits	614,030us-gaap_DepositsFairValueDisclosure	586,796us-gaap_DepositsFairValueDisclosure
Short-term borrowings	4,913us-gaap_ShortTermBorrowings	14,808us-gaap_ShortTermBorrowings
Short-term borrowings	4,913us-gaap_ShorttermDebtFairValue	14,808us-gaap_ShorttermDebtFairValue
Other borrowings	10,533us-gaap_OtherBorrowings	10,624us-gaap_OtherBorrowings
Other borrowings	12,528us-gaap_OtherLiabilitiesFairValueDisclosure	10,822us-gaap_OtherLiabilitiesFairValueDisclosure
Accrued interest payable	304us-gaap_InterestPayableCurrentAndNoncurrent	315us-gaap_InterestPayableCurrentAndNoncurrent
Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents	45,262us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	25,639us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Bank-owned life insurance	9,161us-gaap_BankOwnedLifeInsurance / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	9,092us-gaap_BankOwnedLifeInsurance / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Federal Home Loan Bank stock	1,887us-gaap_FederalHomeLoanBankStock / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	1,887us-gaap_FederalHomeLoanBankStock / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Accrued interest receivable	2,549us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	2,095us-gaap_InterestReceivable / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Financial liabilities:
Deposits	427,137us-gaap_DepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	416,254us-gaap_DepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Short-term borrowings	4,913us-gaap_ShorttermDebtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	14,808us-gaap_ShorttermDebtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Accrued interest payable	304us-gaap_InterestPayableCurrentAndNoncurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member	315us-gaap_InterestPayableCurrentAndNoncurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Fair Value, Inputs, Level 2 [Member]
Financial assets:
Investment securities available for sale, at fair value	151,159us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	154,334us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Investment securities available for sale, at fair value	151,159us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	154,334us-gaap_AvailableForSaleSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Loans held for sale	690us-gaap_LoansHeldForSaleFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	438us-gaap_LoansHeldForSaleFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 3 [Member]
Financial assets:
Net loans	481,581us-gaap_LoansReceivableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member	475,019us-gaap_LoansReceivableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Financial liabilities:
Deposits	186,893us-gaap_DepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member	170,542us-gaap_DepositsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Other borrowings	$ 12,528us-gaap_OtherLiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member	$ 10,822us-gaap_OtherLiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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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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Amount 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. Excludes cash and cash equivalents within disposal group and discontinued operation.

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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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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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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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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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Amount of interest payable on debt, including, but not limited to, trade payables.

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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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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Fair value portion of other liabilities.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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