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Note 4 - Loans (Details) - Impaired Loan Data - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
With No Related Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With No Related Allowance Recorded | $ 29,820,855 | $ 38,059,962 | $ 36,743,773
Impaired Balance, With No Related Allowance Recorded | 23,508,793 | 29,490,794 | 31,289,198
Average Recorded Investment, With No Related Allowance Recorded | 25,289,234 | 29,505,144 | 24,208,769
Interest Income Recognized, With No Related Allowance Recorded | 752,278 | 802,520 | 797,609
Interest Income Collected, With No Related Allowance Recorded | 765,424 | 859,046 | 801,632
With An Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With An Allowance Recorded | 10,639,996 | 8,908,093 | 16,526,228
Impaired Balance, With An Allowance Recorded | 10,618,411 | 8,829,393 | 13,975,141
Related Allowance, With An Allowance Recorded | 2,073,418 | 1,051,114 | 2,299,450
Average Recorded Investment, With An Allowance Recorded | 8,344,476 | 10,722,024 | 22,112,224
Interest Income Recognized, With An Allowance Recorded | 253,603 | 157,959 | 242,599
Interest Income Collected, With An Allowance Recorded | 248,297 | 149,525 | 240,587
Total |  |  |
Unpaid Contractual Principal Balance, Total | 40,460,851 | 46,968,055 | 53,270,001
Impaired Balance, Total | 34,127,204 | 38,320,187 | 45,264,339
Related Allowance, Total | 2,073,418 | 1,051,114 | 2,299,450
Average Recorded Investment, Total | 33,633,710 | 40,227,168 | 46,320,993
Interest Income Recognized, Total | 1,005,881 | 960,479 | 1,040,208
Interest Income Collected, Total | 1,013,721 | 1,008,571 | 1,042,219
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] |  |  |
With No Related Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With No Related Allowance Recorded | 454,423 | 310,447 | 305,272
Impaired Balance, With No Related Allowance Recorded | 454,013 | 308,817 | 305,272
Average Recorded Investment, With No Related Allowance Recorded | 534,814 | 679,267 | 216,057
Interest Income Recognized, With No Related Allowance Recorded | 17,259 | 9,248 | 24,494
Interest Income Collected, With No Related Allowance Recorded | 21,253 | 17,973 | 25,193
With An Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With An Allowance Recorded | 122,928 | 96,580 | 1,452,798
Impaired Balance, With An Allowance Recorded | 122,928 | 96,580 | 1,452,798
Related Allowance, With An Allowance Recorded | 94,538 | 96,580 | 433,714
Average Recorded Investment, With An Allowance Recorded | 99,749 | 419,464 | 1,689,125
Interest Income Recognized, With An Allowance Recorded | 2,275 | (299) | 14,845
Interest Income Collected, With An Allowance Recorded | 2,438 | 0 | 20,748
Total |  |  |
Unpaid Contractual Principal Balance, Total | 577,351 | 407,027 | 1,758,070
Impaired Balance, Total | 576,941 | 405,397 | 1,758,070
Related Allowance, Total | 94,538 | 96,580 | 433,714
Average Recorded Investment, Total | 634,563 | 1,098,731 | 1,905,182
Interest Income Recognized, Total | 19,534 | 8,949 | 39,339
Interest Income Collected, Total | 23,691 | 17,973 | 45,941
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] |  |  |
With No Related Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With No Related Allowance Recorded | 195,654 | 50,163 | 0
Impaired Balance, With No Related Allowance Recorded | 178,021 | 44,605 | 0
Average Recorded Investment, With No Related Allowance Recorded | 163,078 | 50,959 | 9,803
Interest Income Recognized, With No Related Allowance Recorded | (9,957) | (6,029) | 0
Interest Income Collected, With No Related Allowance Recorded | 10,334 | 3,000 | 0
With An Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With An Allowance Recorded | 0 | 0 |
Impaired Balance, With An Allowance Recorded | 0 | 0 |
Related Allowance, With An Allowance Recorded | 0 | 0 | 0
Average Recorded Investment, With An Allowance Recorded | 0 | 0 |
Interest Income Recognized, With An Allowance Recorded | 0 | 0 |
Interest Income Collected, With An Allowance Recorded | 0 | 0 |
Total |  |  |
Unpaid Contractual Principal Balance, Total | 195,654 | 50,163 | 0
Impaired Balance, Total | 178,021 | 44,605 | 0
Related Allowance, Total | 0 | 0 | 0
Average Recorded Investment, Total | 163,078 | 50,959 | 9,803
Interest Income Recognized, Total | (9,957) | (6,029) | 0
Interest Income Collected, Total | 10,334 | 3,000 | 0
Real Estate Portfolio Segment [Member] | Commercial [Member] |  |  |
With No Related Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With No Related Allowance Recorded | 15,569,340 | 17,129,876 | 20,120,403
Impaired Balance, With No Related Allowance Recorded | 15,122,486 | 16,227,379 | 19,252,946
Average Recorded Investment, With No Related Allowance Recorded | 15,430,252 | 18,350,015 | 13,198,988
Interest Income Recognized, With No Related Allowance Recorded | 529,376 | 462,355 | 493,940
Interest Income Collected, With No Related Allowance Recorded | 530,699 | 474,936 | 503,392
With An Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With An Allowance Recorded | 8,969,329 | 6,135,238 | 5,874,473
Impaired Balance, With An Allowance Recorded | 8,955,503 | 6,135,238 | 5,874,473
Related Allowance, With An Allowance Recorded | 1,607,962 | 456,941 | 423,685
Average Recorded Investment, With An Allowance Recorded | 6,673,087 | 6,415,086 | 11,072,314
Interest Income Recognized, With An Allowance Recorded | 213,693 | 60,629 | 157,536
Interest Income Collected, With An Allowance Recorded | 208,657 | 50,468 | 148,495
Total |  |  |
Unpaid Contractual Principal Balance, Total | 24,538,669 | 23,265,114 | 25,994,876
Impaired Balance, Total | 24,077,989 | 22,362,617 | 25,127,419
Related Allowance, Total | 1,607,962 | 456,941 | 423,685
Average Recorded Investment, Total | 22,103,339 | 24,765,101 | 24,271,302
Interest Income Recognized, Total | 743,069 | 522,984 | 651,476
Interest Income Collected, Total | 739,356 | 525,404 | 651,887
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] |  |  |
With No Related Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With No Related Allowance Recorded | 6,887,522 | 9,573,141 | 7,856,411
Impaired Balance, With No Related Allowance Recorded | 1,896,938 | 3,463,502 | 4,750,157
Average Recorded Investment, With No Related Allowance Recorded | 2,867,061 | 3,376,033 | 4,105,370
Interest Income Recognized, With No Related Allowance Recorded | 25,788 | 13,111 | 34,908
Interest Income Collected, With No Related Allowance Recorded | 27,007 | 12,833 | 41,164
With An Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With An Allowance Recorded | 76,644 | 207,308 | 5,922,674
Impaired Balance, With An Allowance Recorded | 76,644 | 136,369 | 3,471,587
Related Allowance, With An Allowance Recorded | 25,344 | 53,947 | 830,546
Average Recorded Investment, With An Allowance Recorded | 92,200 | 1,528,817 | 5,025,176
Interest Income Recognized, With An Allowance Recorded | 375 | 375 | (159)
Interest Income Collected, With An Allowance Recorded | 375 | 375 | 0
Total |  |  |
Unpaid Contractual Principal Balance, Total | 6,964,166 | 9,780,449 | 13,779,085
Impaired Balance, Total | 1,973,582 | 3,599,871 | 8,221,744
Related Allowance, Total | 25,344 | 53,947 | 830,546
Average Recorded Investment, Total | 2,959,261 | 4,904,850 | 9,130,546
Interest Income Recognized, Total | 26,163 | 13,486 | 34,749
Interest Income Collected, Total | 27,382 | 13,208 | 41,164
Real Estate Portfolio Segment [Member] | Residential [Member] |  |  |
With No Related Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With No Related Allowance Recorded | 5,429,121 | 9,136,987 | 7,836,718
Impaired Balance, With No Related Allowance Recorded | 4,575,547 | 7,600,073 | 6,361,592
Average Recorded Investment, With No Related Allowance Recorded | 4,715,162 | 5,690,573 | 4,564,666
Interest Income Recognized, With No Related Allowance Recorded | 175,484 | 312,024 | 224,439
Interest Income Collected, With No Related Allowance Recorded | 159,148 | 306,859 | 209,330
With An Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With An Allowance Recorded | 1,083,127 | 2,072,919 | 1,949,301
Impaired Balance, With An Allowance Recorded | 1,075,367 | 2,065,158 | 1,849,301
Related Allowance, With An Allowance Recorded | 308,188 | 414,684 | 526,005
Average Recorded Investment, With An Allowance Recorded | 1,088,380 | 1,829,102 | 3,661,706
Interest Income Recognized, With An Allowance Recorded | 16,380 | 84,177 | 25,739
Interest Income Collected, With An Allowance Recorded | 15,873 | 86,472 | 24,414
Total |  |  |
Unpaid Contractual Principal Balance, Total | 6,512,248 | 11,209,906 | 9,786,019
Impaired Balance, Total | 5,650,914 | 9,665,231 | 8,210,893
Related Allowance, Total | 308,188 | 414,684 | 526,005
Average Recorded Investment, Total | 5,803,542 | 7,519,675 | 8,226,372
Interest Income Recognized, Total | 191,864 | 396,201 | 250,178
Interest Income Collected, Total | 175,021 | 393,331 | 233,744
Real Estate Portfolio Segment [Member] | Farmland [Member] |  |  |
With No Related Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With No Related Allowance Recorded | 1,104,887 | 1,450,759 | 302,629
Impaired Balance, With No Related Allowance Recorded | 1,103,353 | 1,449,226 | 302,629
Average Recorded Investment, With No Related Allowance Recorded | 1,339,863 | 949,003 | 1,858,654
Interest Income Recognized, With No Related Allowance Recorded | 583 | (8,518) | 803
Interest Income Collected, With No Related Allowance Recorded | 2,076 | 17,273 | 869
With An Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With An Allowance Recorded | 387,968 | 396,048 | 1,326,982
Impaired Balance, With An Allowance Recorded | 387,969 | 396,048 | 1,326,982
Related Allowance, With An Allowance Recorded | 37,386 | 28,962 | 85,500
Average Recorded Investment, With An Allowance Recorded | 391,060 | 529,555 | 663,903
Interest Income Recognized, With An Allowance Recorded | 20,880 | 13,077 | 44,638
Interest Income Collected, With An Allowance Recorded | 20,954 | 12,210 | 46,930
Total |  |  |
Unpaid Contractual Principal Balance, Total | 1,492,855 | 1,846,807 | 1,629,611
Impaired Balance, Total | 1,491,322 | 1,845,274 | 1,629,611
Related Allowance, Total | 37,386 | 28,962 | 85,500
Average Recorded Investment, Total | 1,730,923 | 1,478,558 | 2,522,557
Interest Income Recognized, Total | 21,463 | 4,559 | 45,441
Interest Income Collected, Total | 23,030 | 29,483 | 47,799
Consumer and Other Portfolio Segment [Member] | Consumer [Member] |  |  |
With No Related Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With No Related Allowance Recorded | 179,908 | 201,695 | 313,194
Impaired Balance, With No Related Allowance Recorded | 178,435 | 201,695 | 307,456
Average Recorded Investment, With No Related Allowance Recorded | 190,566 | 211,775 | 252,944
Interest Income Recognized, With No Related Allowance Recorded | 13,745 | 14,455 | 18,469
Interest Income Collected, With No Related Allowance Recorded | 14,907 | 15,495 | 21,109
With An Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With An Allowance Recorded | 0 | 0 |
Impaired Balance, With An Allowance Recorded | 0 | 0 |
Related Allowance, With An Allowance Recorded | 0 | 0 | 0
Average Recorded Investment, With An Allowance Recorded | 0 | 0 |
Interest Income Recognized, With An Allowance Recorded | 0 | 0 |
Interest Income Collected, With An Allowance Recorded | 0 | 0 |
Total |  |  |
Unpaid Contractual Principal Balance, Total | 179,908 | 201,695 | 313,194
Impaired Balance, Total | 178,435 | 201,695 | 307,456
Related Allowance, Total | 0 | 0 | 0
Average Recorded Investment, Total | 190,566 | 211,775 | 252,944
Interest Income Recognized, Total | 13,745 | 14,455 | 18,469
Interest Income Collected, Total | 14,907 | 15,495 | 21,109
Consumer and Other Portfolio Segment [Member] | Other [Member] |  |  |
With No Related Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With No Related Allowance Recorded |  | 206,894 | 9,146
Impaired Balance, With No Related Allowance Recorded |  | 195,497 | 9,146
Average Recorded Investment, With No Related Allowance Recorded | 48,438 | 197,519 | 2,287
Interest Income Recognized, With No Related Allowance Recorded |  | 5,874 | 556
Interest Income Collected, With No Related Allowance Recorded |  | 10,677 | 575
With An Allowance Recorded |  |  |
Unpaid Contractual Principal Balance, With An Allowance Recorded | 0 | 0 |
Impaired Balance, With An Allowance Recorded | 0 | 0 |
Related Allowance, With An Allowance Recorded | 0 | 0 | 0
Average Recorded Investment, With An Allowance Recorded | 0 | 0 |
Interest Income Recognized, With An Allowance Recorded | 0 | 0 |
Interest Income Collected, With An Allowance Recorded | 0 | 0 |
Total |  |  |
Unpaid Contractual Principal Balance, Total |  | 206,894 | 9,146
Impaired Balance, Total |  | 195,497 | 9,146
Related Allowance, Total | 0 | 0 | 0
Average Recorded Investment, Total | $ 48,438 | 197,519 | 2,287
Interest Income Recognized, Total |  | 5,874 | 556
Interest Income Collected, Total |  | $ 10,677 | $ 575

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