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Note 5 - Loans - Age Analysis of Past Due Loans and Nonaccrual Loans (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Accruing loans past due | $ 8,234,481 | $ 4,558,405 |
Nonaccrual loans | 9,481,986 | 7,502,702 |
Current loans | 764,310,901 | 753,222,748 |
Loans | 782,027,368 | 765,283,855 | $ 754,283,563
Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 8,234,481 | 4,558,405 |
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due |  |  |
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] |  |  |
Accruing loans past due | 282,116 | 328,483 |
Nonaccrual loans | 637,085 | 598,305 |
Current loans | 56,491,272 | 47,195,475 |
Loans | 57,410,473 | 48,122,263 | 47,024,878
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 282,116 | 328,483 |
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due |  |  |
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] |  |  |
Accruing loans past due | 117,087 | 110,482 |
Nonaccrual loans | 413,254 | 398,509 |
Current loans | 16,268,402 | 15,933,590 |
Loans | 16,798,743 | 16,442,581 | 17,079,579
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 117,087 | 110,482 |
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due |  |  |
Real Estate Portfolio Segment [Member] | Commercial [Member] |  |  |
Accruing loans past due | 679,387 | 918,997 |
Nonaccrual loans | 2,965,546 | 2,172,229 |
Current loans | 369,888,629 | 348,080,442 |
Loans | 373,533,562 | 351,171,668 | 349,090,031
Real Estate Portfolio Segment [Member] | Commercial [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 679,387 | 918,997 |
Real Estate Portfolio Segment [Member] | Commercial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due |  |  |
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] |  |  |
Accruing loans past due | 88,371 | 27,062 |
Nonaccrual loans | 462,841 | 477,043 |
Current loans | 47,297,542 | 44,709,855 |
Loans | 47,848,754 | 45,213,960 | 30,358,362
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 88,371 | 27,062 |
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due |  |  |
Real Estate Portfolio Segment [Member] | Residential Construction [Member] |  |  |
Accruing loans past due |  | 119,443 |
Nonaccrual loans |  |  |
Current loans | 12,499,744 | 8,464,003 |
Loans | 12,499,744 | 8,583,446 | 11,830,447
Real Estate Portfolio Segment [Member] | Residential Construction [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due |  | 119,443 |
Real Estate Portfolio Segment [Member] | Residential Construction [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due |  |  |
Real Estate Portfolio Segment [Member] | Residential [Member] |  |  |
Accruing loans past due | 6,881,632 | 2,482,276 |
Nonaccrual loans | 2,734,179 | 2,829,966 |
Current loans | 178,098,561 | 188,736,703 |
Loans | 187,714,372 | 194,048,945 | 195,579,967
Real Estate Portfolio Segment [Member] | Residential [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 6,881,632 | 2,482,276 |
Real Estate Portfolio Segment [Member] | Residential [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due |  |  |
Real Estate Portfolio Segment [Member] | Farmland [Member] |  |  |
Accruing loans past due | 75,548 | 318,329 |
Nonaccrual loans | 2,052,604 | 838,577 |
Current loans | 60,580,846 | 66,610,749 |
Loans | 62,708,998 | 67,767,655 | 66,877,197
Real Estate Portfolio Segment [Member] | Farmland [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 75,548 | 318,329 |
Real Estate Portfolio Segment [Member] | Farmland [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due |  |  |
Consumer and Other Portfolio Segment [Member] | Consumer [Member] |  |  |
Accruing loans past due | 110,340 | 246,175 |
Nonaccrual loans | 212,524 | 188,073 |
Current loans | 18,162,335 | 18,521,780 |
Loans | 18,485,199 | 18,956,028 | 19,695,241
Consumer and Other Portfolio Segment [Member] | Consumer [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 110,340 | 246,175 |
Consumer and Other Portfolio Segment [Member] | Consumer [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due |  |  |
Consumer and Other Portfolio Segment [Member] | Other [Member] |  |  |
Accruing loans past due |  | 7,158 |
Nonaccrual loans | 3,953 |  |
Current loans | 5,023,570 | 14,970,151 |
Loans | 5,027,523 | 14,977,309 | $ 16,747,861
Consumer and Other Portfolio Segment [Member] | Other [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due |  | 7,158 |
Consumer and Other Portfolio Segment [Member] | Other [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due |  |  |

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