Note 8 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Financial Instruments (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Financial assets:
Cash and cash equivalents	$ 44,056,887	$ 12,493,890	$ 49,242,713	$ 12,303,200
Held-to-maturity securities	56,523us-gaap_HeldToMaturitySecurities	60,993us-gaap_HeldToMaturitySecurities
Federal Home Loan Bank stock	2,847,500us-gaap_FederalHomeLoanBankStock	3,156,900us-gaap_FederalHomeLoanBankStock
Mortgage loans held for sale	1,417,706us-gaap_LoansHeldForSaleMortgages	1,214,632us-gaap_LoansHeldForSaleMortgages
Loans, net	494,728,868	486,586,636
Financial liabilities:
Deposits	525,821,413us-gaap_Deposits	479,818,282us-gaap_Deposits
Securities sold under agreements to repurchase	10,000,000	10,000,000
Subordinated debentures	15,465,000us-gaap_SubordinatedDebt	15,465,000us-gaap_SubordinatedDebt
Interest payable	240,626	242,145
Interest payable, fair value	240,626	242,145
Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents	44,056,887	12,493,890
Cash and cash equivalents, fair value	44,056,887	12,493,890
Fair Value, Inputs, Level 2 [Member]
Financial assets:
Held-to-maturity securities	56,523	60,993
Held-to-maturity securities, fair value	58,008	62,619
Federal Home Loan Bank stock	2,847,500	3,156,900
Federal Home Loan Bank stock, fair value	2,847,500	3,156,900
Mortgage loans held for sale	1,417,706	1,214,632
Mortgage loans held for sale, fair value	1,417,706	1,214,632
Interest receivable	1,828,834	2,030,058
Interest receivable, fair value	1,828,834	2,030,058
Financial liabilities:
Deposits	525,821,413	479,818,282
Deposits, fair value	523,547,849	476,519,750
Federal Home Loan Bank and Federal Reserve Bank advances	52,350,000	60,350,000
Federal Home Loan Bank and Federal Reserve Bank advances, fair value	54,026,598	61,615,252
Securities sold under agreements to repurchase	10,000,000	10,000,000
Securities sold under agreements to repurchase, fair value	10,413,014	10,371,866
Interest payable	240,626	242,145
Interest payable, fair value	240,626	242,145
Fair Value, Inputs, Level 3 [Member]
Financial assets:
Loans, net	494,728,868	486,586,636
Loans, net, fair value	496,967,473	487,244,753
Financial liabilities:
Subordinated debentures	15,465,000	15,465,000
Subordinated debentures, fair value	$ 15,465,000	$ 15,465,000

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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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This item represents a financial instrument (as defined) for which it is not practicable to estimate fair value. Such disclosure may be for an individual financial instrument or a class of financial instruments.

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Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

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Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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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 after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Fair value of investments in debt securities classified as held-to-maturity.

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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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Amount classified as mortgage loans attributable to disposal group held for sale or disposed of. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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Fair value portion of securities that an entity sells and agrees to repurchase at a specified date for a specified price.

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Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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