Note 19 - Fair Value (Detail) - Assets Measured at Fair Value on a Recurring Basis (USD $)	Dec. 31, 2012	Dec. 31, 2011
Securities available for sale:
Securities available for sale	$ 530,159,986	$ 565,029,291
US Government Agencies Debt Securities [Member] \| Estimate of Fair Value, Fair Value Disclosure [Member]
Securities available for sale:
Securities available for sale	338,609,371	428,955,220
US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale:
Securities available for sale	0	0
US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale:
Securities available for sale	338,609,371	428,955,220
US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale:
Securities available for sale	0	0
Residential Mortgage Backed Securities [Member] \| Estimate of Fair Value, Fair Value Disclosure [Member]
Securities available for sale:
Securities available for sale	163,601,103	108,853,749
Residential Mortgage Backed Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale:
Securities available for sale	0	0
Residential Mortgage Backed Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale:
Securities available for sale	163,601,103	108,853,749
Residential Mortgage Backed Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale:
Securities available for sale	0	0
US States and Political Subdivisions Debt Securities [Member] \| Estimate of Fair Value, Fair Value Disclosure [Member]
Securities available for sale:
Securities available for sale	26,185,736	25,689,364
US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale:
Securities available for sale	0	0
US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale:
Securities available for sale	26,185,736	25,689,364
US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale:
Securities available for sale	0	0
Trust preferred securities [Member] \| Estimate of Fair Value, Fair Value Disclosure [Member]
Securities available for sale:
Securities available for sale	139,400	80,800
Trust preferred securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale:
Securities available for sale	0	0
Trust preferred securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale:
Securities available for sale	139,400	80,800
Trust preferred securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale:
Securities available for sale	0	0
Equity Securities, Other [Member] \| Estimate of Fair Value, Fair Value Disclosure [Member]
Securities available for sale:
Securities available for sale	1,624,376	1,450,158
Equity Securities, Other [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale:
Securities available for sale	234,453	191,506
Equity Securities, Other [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale:
Securities available for sale	1,389,923	1,258,652
Equity Securities, Other [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale:
Securities available for sale	0	0
Impaired Loans/Leases [Member] \| Estimate of Fair Value, Fair Value Disclosure [Member]
Securities available for sale:
Assets measured on a non-recurring basis	18,054,234	19,603,360
Impaired Loans/Leases [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale:
Assets measured on a non-recurring basis	0	0
Impaired Loans/Leases [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale:
Assets measured on a non-recurring basis	0	0
Impaired Loans/Leases [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale:
Assets measured on a non-recurring basis	18,054,234	19,603,360
Other Real Estate Owned [Member] \| Estimate of Fair Value, Fair Value Disclosure [Member]
Securities available for sale:
Assets measured on a non-recurring basis	4,270,901	9,056,619
Other Real Estate Owned [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale:
Assets measured on a non-recurring basis	0	0
Other Real Estate Owned [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale:
Assets measured on a non-recurring basis	0	0
Other Real Estate Owned [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale:
Assets measured on a non-recurring basis	4,270,901	9,056,619
Estimate of Fair Value, Fair Value Disclosure [Member]
Securities available for sale:
Securities available for sale	530,159,986	565,029,291
Assets measured on a non-recurring basis	22,325,135	28,659,979
Fair Value, Inputs, Level 1 [Member]
Securities available for sale:
Securities available for sale	234,453	191,506
Assets measured on a non-recurring basis	0	0
Fair Value, Inputs, Level 2 [Member]
Securities available for sale:
Securities available for sale	529,925,533	564,837,785
Assets measured on a non-recurring basis	0	0
Fair Value, Inputs, Level 3 [Member]
Securities available for sale:
Securities available for sale	0	0
Assets measured on a non-recurring basis	$ 22,325,135	$ 28,659,979

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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