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Note 4 - Loans - Loan Portfolio by Credit Quality Indicator (Details) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Loans | $ 765,283,855 | $ 754,283,563 | $ 758,635,595
Pass [Member] |  |  |
Loans | 728,740,714 | 707,965,052 |
Special Mention [Member] |  |  |
Loans | 14,610,955 | 19,530,573 |
Substandard [Member] |  |  |
Loans | 21,932,186 | 26,787,938 |
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] |  |  |
Loans | 48,122,263 | 47,024,878 | 47,781,689
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] | Pass [Member] |  |  |
Loans | 46,468,726 | 44,249,874 |
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] | Special Mention [Member] |  |  |
Loans | 825,607 | 1,861,757 |
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] | Substandard [Member] |  |  |
Loans | 827,930 | 913,247 |
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] |  |  |
Loans | 16,442,581 | 17,079,579 | 19,193,497
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] | Pass [Member] |  |  |
Loans | 15,868,191 | 16,585,646 |
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] | Special Mention [Member] |  |  |
Loans | 174,356 | 192,445 |
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] | Substandard [Member] |  |  |
Loans | 400,034 | 301,488 |
Real Estate Portfolio Segment [Member] | Commercial [Member] |  |  |
Loans | 351,171,668 | 349,090,031 | 346,262,033
Real Estate Portfolio Segment [Member] | Commercial [Member] | Pass [Member] |  |  |
Loans | 338,775,805 | 327,561,169 |
Real Estate Portfolio Segment [Member] | Commercial [Member] | Special Mention [Member] |  |  |
Loans | 7,662,637 | 9,403,077 |
Real Estate Portfolio Segment [Member] | Commercial [Member] | Substandard [Member] |  |  |
Loans | 4,733,226 | 12,125,785 |
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] |  |  |
Loans | 45,213,960 | 30,358,362 | 40,106,633
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] | Pass [Member] |  |  |
Loans | 41,282,295 | 28,425,373 |
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] | Special Mention [Member] |  |  |
Loans | 577,765 | 1,349,447 |
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] | Substandard [Member] |  |  |
Loans | 3,353,900 | 583,542 |
Real Estate Portfolio Segment [Member] | Residential Construction [Member] |  |  |
Loans | 8,583,446 | 11,830,447 | 9,413,263
Real Estate Portfolio Segment [Member] | Residential Construction [Member] | Pass [Member] |  |  |
Loans | 8,583,446 | 11,630,165 |
Real Estate Portfolio Segment [Member] | Residential Construction [Member] | Special Mention [Member] |  |  |
Loans | 0 |  |
Real Estate Portfolio Segment [Member] | Residential Construction [Member] | Substandard [Member] |  |  |
Loans |  | 200,282 |
Real Estate Portfolio Segment [Member] | Residential [Member] |  |  |
Loans | 194,048,945 | 195,579,967 | 197,002,419
Real Estate Portfolio Segment [Member] | Residential [Member] | Pass [Member] |  |  |
Loans | 177,962,870 | 178,618,510 |
Real Estate Portfolio Segment [Member] | Residential [Member] | Special Mention [Member] |  |  |
Loans | 4,864,893 | 5,658,526 |
Real Estate Portfolio Segment [Member] | Residential [Member] | Substandard [Member] |  |  |
Loans | 11,221,182 | 11,302,931 |
Real Estate Portfolio Segment [Member] | Farmland [Member] |  |  |
Loans | 67,767,655 | 66,877,197 | 61,779,859
Real Estate Portfolio Segment [Member] | Farmland [Member] | Pass [Member] |  |  |
Loans | 66,334,906 | 65,074,715 |
Real Estate Portfolio Segment [Member] | Farmland [Member] | Special Mention [Member] |  |  |
Loans | 444,095 | 839,362 |
Real Estate Portfolio Segment [Member] | Farmland [Member] | Substandard [Member] |  |  |
Loans | 988,654 | 963,120 |
Consumer and Other Portfolio Segment [Member] | Consumer [Member] |  |  |
Loans | 18,956,028 | 19,695,241 | 20,605,465
Consumer and Other Portfolio Segment [Member] | Consumer [Member] | Pass [Member] |  |  |
Loans | 18,495,798 | 19,071,739 |
Consumer and Other Portfolio Segment [Member] | Consumer [Member] | Special Mention [Member] |  |  |
Loans | 52,970 | 225,959 |
Consumer and Other Portfolio Segment [Member] | Consumer [Member] | Substandard [Member] |  |  |
Loans | 407,260 | 397,543 |
Consumer and Other Portfolio Segment [Member] | Other [Member] |  |  |
Loans | 14,977,309 | 16,747,861 | $ 16,490,737
Consumer and Other Portfolio Segment [Member] | Other [Member] | Pass [Member] |  |  |
Loans | 14,968,677 | 16,747,861 |
Consumer and Other Portfolio Segment [Member] | Other [Member] | Special Mention [Member] |  |  |
Loans | 8,632 |  |
Consumer and Other Portfolio Segment [Member] | Other [Member] | Substandard [Member] |  |  |
Loans |  |  |

X
- Definition 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=82891408&loc=d3e4428-111522 + Details
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