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Note 4 - Loans (Details) - Loans Segregated by Class of Loans - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commercial and Agricultural
Loans receivable	$ 758,635,595	$ 746,093,809	$ 751,218,462
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member]
Commercial and Agricultural
Loans receivable	47,781,689	50,960,265	48,107,448
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member]
Commercial and Agricultural
Loans receivable	19,193,497	16,689,444	10,665,938
Real Estate Portfolio Segment [Member] | Commercial [Member]
Commercial and Agricultural
Loans receivable	346,262,033	332,230,847	341,783,538
Real Estate Portfolio Segment [Member] | Commercial Construction [Member]
Commercial and Agricultural
Loans receivable	40,106,633	51,258,970	52,738,783
Real Estate Portfolio Segment [Member] | Residential Construction [Member]
Commercial and Agricultural
Loans receivable	9,413,263	11,220,683	6,549,260
Real Estate Portfolio Segment [Member] | Residential [Member]
Commercial and Agricultural
Loans receivable	197,002,419	203,752,620	206,257,927
Real Estate Portfolio Segment [Member] | Farmland [Member]
Commercial and Agricultural
Loans receivable	61,779,859	49,950,984	47,034,426
Consumer and Other Portfolio Segment [Member] | Consumer [Member]
Commercial and Agricultural
Loans receivable	20,605,465	22,820,314	25,675,560
Consumer and Other Portfolio Segment [Member] | Other [Member]
Commercial and Agricultural
Loans receivable	$ 16,490,737	$ 7,209,682	$ 12,405,582

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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