Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities (USD $)	Mar. 31, 2015	Dec. 31, 2014
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Cash and due from banks	$ 45,138,266us-gaap_CashAndDueFromBanks	$ 38,235,019us-gaap_CashAndDueFromBanks
Federal funds sold	14,035,000us-gaap_FederalFundsSold	46,780,000us-gaap_FederalFundsSold
Interest-bearing deposits at financial institutions	17,118,983us-gaap_InterestBearingDepositsInBanks	35,334,682us-gaap_InterestBearingDepositsInBanks
Held to maturity	215,146,171us-gaap_HeldToMaturitySecurities
Held to maturity	215,636,997	201,113,796
Available for sale	422,258,100us-gaap_AvailableForSaleSecurities	451,659,630us-gaap_AvailableForSaleSecurities
Derivative instruments	1,114,101us-gaap_DerivativeAssets	1,487,386us-gaap_DerivativeAssets
Deposits	1,734,269,387us-gaap_Deposits	1,679,668,013us-gaap_Deposits
Other borrowings	149,109,915us-gaap_OtherBorrowings	150,282,492us-gaap_OtherBorrowings
Nonmaturity Deposits [Member] \| Fair Value, Inputs, Level 2 [Member]
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Deposits	1,386,860,881	1,304,044,099
Deposits, fair value	1,386,860,881	1,304,044,099
Time Deposits [Member] \| Fair Value, Inputs, Level 2 [Member]
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Deposits	347,408,506	375,623,914
Deposits, fair value	348,466,000	376,509,000
Interest-bearing Deposits [Member] \| Fair Value, Inputs, Level 2 [Member]
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Interest-bearing deposits at financial institutions	17,118,983	35,334,682
Interest-bearing deposits at financial institutions	17,118,983	35,334,682
Fair Value, Inputs, Level 1 [Member]
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Cash and due from banks	45,138,266	38,235,019
Fair Value, Inputs, Level 2 [Member] \| Interest Rate Cap [Member]
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Derivative instruments	1,114,101	1,487,386
Fair Value, Inputs, Level 2 [Member]
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Federal funds sold	14,035,000	46,780,000
Federal funds sold	14,035,000	46,780,000
Loans/leases receivable, net	1,621,861,047	1,595,384,851
Loans/leases receivable, net, fair value	1,636,808,084	1,606,646,146
Derivative instruments	1,114,101	1,487,386
Short-term borrowings	183,335,719	268,351,670
Short-term borrowings	183,335,719	268,351,670
Federal Home Loan Bank advances	196,500,000	203,500,000
Federal Home Loan Bank advances	206,366,000	208,172,000
Other borrowings	149,109,915	150,282,492
Other borrowings	159,278,000	159,741,000
Junior subordinated debentures	40,457,936	40,423,735
Junior subordinated debentures	28,691,964	28,585,294
Fair Value, Inputs, Level 3 [Member]
Note 6 - Fair Value (Details) - Carrying Values and Estimated Fair Values of Financial Assets and Liabilities [Line Items]
Held to maturity	215,146,171	199,879,574
Held to maturity	215,636,997	201,113,796
Loans/leases receivable, net	8,706,916	11,543,854
Loans/leases receivable, net, fair value	$ 9,403,469	$ 12,467,362

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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

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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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For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks.

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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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Fair value, after the effects of master netting arrangements, of a financial asset or other 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 assets not subject to a master netting arrangement and not elected to be offset.

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Fair value of obligations measured on a recurring basis.

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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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Fair value portion of short term borrowing where a bank borrows, at the federal funds rate, from another bank.

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The amount outstanding of funds lent to other depository institutions, securities brokers, or securities dealers in the form of Federal Funds sold; for example, immediately available funds lent under agreements or contracts that mature in one business day or roll over under a continuing contract, regardless of the nature of the transaction or the collateral involved, excluding overnight lending for commercial and industrial purposes. Also include Federal Funds sold under agreements to resell on a gross basis, excluding (1) sales of term Federal Funds, (2) due bills representing purchases of securities or other assets by the reporting bank that have not yet been delivered and similar instruments, (3) resale agreements that mature in more than one business day involving assets other than securities, and (4) yield maintenance dollar repurchase agreements.

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

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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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For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments.

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