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Note 3 - Impaired Loan Data (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] |  |  |
Unpaid contractual principal balance with no related allowance | $ 460,000 | $ 710,000 | $ 454,000
Impaired balance with no related allowance | 460,000 | 648,000 | 454,000
Average recorded investment with no related allowance | 472,000 | 555,000 | 535,000
Interest income recognized with no related allowance | 4,000 | (11,000) | 17,000
Interest income collected with no related allowance | 5,000 | 16,000 | 21,000
Unpaid contractual principal balance with an allowance |  | 92,000 | 123,000
Impaired balance with an allowance | 0 | 92,000 | 123,000
Related allowance | 0 | 92,000 | 95,000
Average recorded investment with an allowance | 50,000 | 93,000 | 100,000
Interest income recognized with an allowance | 0 | 0 | 2,000
Interest income collected with an allowance | 0 | 0 | 3,000
Unpaid contractual principal balance | 460,000 | 802,000 | 577,000
Impaired balance | 460,000 | 740,000 | 577,000
Average recorded investment | 522,000 | 648,000 | 635,000
Interest income recognized | 4,000 | (11,000) | 19,000
Interest income collected | 5,000 | 16,000 | 24,000
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 213,000 | 179,000 | 196,000
Impaired balance with no related allowance | 192,000 | 161,000 | 178,000
Average recorded investment with no related allowance | 188,000 | 159,000 | 163,000
Interest income recognized with no related allowance | 9,000 | (10,000) | (10,000)
Interest income collected with no related allowance | 13,000 | 10,000 | 10,000
Unpaid contractual principal balance with an allowance |  | 0 | 0
Impaired balance with an allowance | 0 | 0 | 0
Related allowance | 0 | 0 | 0
Average recorded investment with an allowance | 0 | 0 | 0
Interest income recognized with an allowance | 0 | 0 | 0
Interest income collected with an allowance | 0 | 0 | 0
Unpaid contractual principal balance | 213,000 | 179,000 | 196,000
Impaired balance | 192,000 | 161,000 | 178,000
Average recorded investment | 188,000 | 159,000 | 163,000
Interest income recognized | 9,000 | (10,000) | (10,000)
Interest income collected | 13,000 | 10,000 | 10,000
Real Estate Portfolio Segment [Member] | Commercial [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 16,383,000 | 15,149,000 | 15,569,000
Impaired balance with no related allowance | 15,615,000 | 15,149,000 | 15,122,000
Average recorded investment with no related allowance | 13,577,000 | 16,093,000 | 15,430,000
Interest income recognized with no related allowance | 271,000 | 281,000 | 529,000
Interest income collected with no related allowance | 270,000 | 261,000 | 531,000
Unpaid contractual principal balance with an allowance | 8,709,000 | 6,639,000 | 8,969,000
Impaired balance with an allowance | 8,695,000 | 5,992,000 | 8,956,000
Related allowance | 2,886,000 | 278,000 | 1,608,000
Average recorded investment with an allowance | 8,305,000 | 5,728,000 | 6,673,000
Interest income recognized with an allowance | 127,000 | 56,000 | 214,000
Interest income collected with an allowance | 124,000 | 47,000 | 209,000
Unpaid contractual principal balance | 25,092,000 | 21,788,000 | 24,538,000
Impaired balance | 24,310,000 | 21,141,000 | 24,078,000
Average recorded investment | 21,882,000 | 21,821,000 | 22,103,000
Interest income recognized | 398,000 | 337,000 | 743,000
Interest income collected | 394,000 | 308,000 | 740,000
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 453,000 | 9,613,000 | 6,888,000
Impaired balance with no related allowance | 428,000 | 3,408,000 | 1,898,000
Average recorded investment with no related allowance | 930,000 | 3,418,000 | 2,867,000
Interest income recognized with no related allowance | 8,000 | 13,000 | 26,000
Interest income collected with no related allowance | 7,000 | 14,000 | 27,000
Unpaid contractual principal balance with an allowance | 74,000 | 80,000 | 77,000
Impaired balance with an allowance | 74,000 | 80,000 | 76,000
Related allowance | 22,000 | 18,000 | 25,000
Average recorded investment with an allowance | 75,000 | 107,000 | 92,000
Interest income recognized with an allowance | 0 | 0 | 0
Interest income collected with an allowance | 0 | 0 | 0
Unpaid contractual principal balance | 527,000 | 9,693,000 | 6,965,000
Impaired balance | 502,000 | 3,488,000 | 1,974,000
Average recorded investment | 1,005,000 | 3,525,000 | 2,959,000
Interest income recognized | 8,000 | 13,000 | 26,000
Interest income collected | 7,000 | 14,000 | 27,000
Real Estate Portfolio Segment [Member] | Residential Construction [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 0 | 0 |
Impaired balance with no related allowance | 0 | 0 |
Average recorded investment with no related allowance | 0 | 0 |
Interest income recognized with no related allowance | 0 | 0 |
Interest income collected with no related allowance | 0 | 0 |
Unpaid contractual principal balance with an allowance | 0 | 0 |
Impaired balance with an allowance | 0 | 0 |
Related allowance | 0 | 0 |
Average recorded investment with an allowance | 0 | 0 |
Interest income recognized with an allowance | 0 | 0 |
Interest income collected with an allowance | 0 | 0 |
Unpaid contractual principal balance | 0 | 0 |
Impaired balance | 0 | 0 |
Average recorded investment | 0 | 0 |
Interest income recognized | 0 | 0 |
Interest income collected | 0 | 0 |
Real Estate Portfolio Segment [Member] | Residential [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 5,227,000 | 5,612,000 | 5,429,000
Impaired balance with no related allowance | 4,956,000 | 4,691,000 | 4,576,000
Average recorded investment with no related allowance | 4,606,000 | 4,943,000 | 4,715,000
Interest income recognized with no related allowance | (7,000) | 115,000 | 176,000
Interest income collected with no related allowance | 119,000 | 105,000 | 159,000
Unpaid contractual principal balance with an allowance | 864,000 | 1,093,000 | 1,083,000
Impaired balance with an allowance | 856,000 | 1,093,000 | 1,075,000
Related allowance | 440,000 | 320,000 | 308,000
Average recorded investment with an allowance | 965,000 | 1,098,000 | 1,089,000
Interest income recognized with an allowance | 3,000 | 9,000 | 16,000
Interest income collected with an allowance | 3,000 | 8,000 | 16,000
Unpaid contractual principal balance | 6,091,000 | 6,705,000 | 6,512,000
Impaired balance | 5,812,000 | 5,784,000 | 5,651,000
Average recorded investment | 5,571,000 | 6,041,000 | 5,804,000
Interest income recognized | (4,000) | 124,000 | 192,000
Interest income collected | 122,000 | 113,000 | 175,000
Real Estate Portfolio Segment [Member] | Farmland [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 935,000 | 1,444,000 | 1,105,000
Impaired balance with no related allowance | 933,000 | 1,442,000 | 1,103,000
Average recorded investment with no related allowance | 1,121,000 | 1,430,000 | 1,340,000
Interest income recognized with no related allowance | (3,000) | 3,000 | 1,000
Interest income collected with no related allowance | 1,000 | 4,000 | 2,000
Unpaid contractual principal balance with an allowance | 384,000 | 392,000 | 388,000
Impaired balance with an allowance | 384,000 | 392,000 | 388,000
Related allowance | 33,000 | 59,000 | 37,000
Average recorded investment with an allowance | 386,000 | 393,000 | 391,000
Interest income recognized with an allowance | 10,000 | 11,000 | 21,000
Interest income collected with an allowance | 11,000 | 11,000 | 21,000
Unpaid contractual principal balance | 1,319,000 | 1,836,000 | 1,493,000
Impaired balance | 1,317,000 | 1,834,000 | 1,491,000
Average recorded investment | 1,507,000 | 1,823,000 | 1,731,000
Interest income recognized | 7,000 | 14,000 | 22,000
Interest income collected | 12,000 | 15,000 | 23,000
Consumer and Other Portfolio Segment [Member] | Consumer [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 248,000 | 244,000 | 180,000
Impaired balance with no related allowance | 240,000 | 204,000 | 178,000
Average recorded investment with no related allowance | 205,000 | 198,000 | 191,000
Interest income recognized with no related allowance | 4,000 | (4,000) | 14,000
Interest income collected with no related allowance | 6,000 | 8,000 | 15,000
Unpaid contractual principal balance with an allowance | 0 | 0 | 0
Impaired balance with an allowance | 0 | 0 | 0
Related allowance | 0 | 0 | 0
Average recorded investment with an allowance | 0 | 0 | 0
Interest income recognized with an allowance | 0 | 0 | 0
Interest income collected with an allowance | 0 | 0 | 0
Unpaid contractual principal balance | 248,000 | 244,000 | 180,000
Impaired balance | 240,000 | 204,000 | 178,000
Average recorded investment | 205,000 | 198,000 | 191,000
Interest income recognized | 4,000 | (4,000) | 14,000
Interest income collected | 6,000 | 8,000 | 15,000
Consumer and Other Portfolio Segment [Member] | Other [Member] |  |  |
Unpaid contractual principal balance with no related allowance | 0 | 0 | 0
Impaired balance with no related allowance | 0 | 0 | 0
Average recorded investment with no related allowance | 0 | 97,000 | 48,000
Interest income recognized with no related allowance | 0 | 0 | 0
Interest income collected with no related allowance | 0 | 0 | 0
Unpaid contractual principal balance with an allowance | 0 | 0 | 0
Impaired balance with an allowance | 0 | 0 | 0
Related allowance | 0 | 0 | 0
Average recorded investment with an allowance | 0 | 0 | 0
Interest income recognized with an allowance | 0 | 0 | 0
Interest income collected with an allowance | 0 | 0 | 0
Unpaid contractual principal balance | 0 | 0 | 0
Impaired balance | 0 | 0 | 0
Average recorded investment | 0 | 97,000 | 48,000
Interest income recognized | 0 | 0 | 0
Interest income collected | 0 | 0 | 0
Unpaid contractual principal balance with no related allowance | 23,919,000 | 32,951,000 | 29,821,000
Impaired balance with no related allowance | 22,824,000 | 25,703,000 | 23,509,000
Average recorded investment with no related allowance | 21,099 | 26,893,000 | 25,289,000
Interest income recognized with no related allowance | 286,000 | 387,000 | 753,000
Interest income collected with no related allowance | 421,000 | 418,000 | 765,000
Unpaid contractual principal balance with an allowance | 10,031,000 | 8,296,000 | 10,640,000
Impaired balance with an allowance | 10,009,000 | 7,649,000 | 10,618,000
Related allowance | 3,381,000 | 767,000 | 2,073,000
Average recorded investment with an allowance | 9,781,000 | 7,419,000 | 8,345,000
Interest income recognized with an allowance | 140,000 | 76,000 | 253,000
Interest income collected with an allowance | 138,000 | 66,000 | 249,000
Unpaid contractual principal balance | 33,950,000 | 41,247,000 | 40,461,000
Impaired balance | 32,833,000 | 33,352,000 | 34,127,000
Average recorded investment | 30,880,000 | 34,312,000 | 33,634,000
Interest income recognized | 426,000 | 463,000 | 1,006,000
Interest income collected | $ 559,000 | $ 484,000 | $ 1,014,000

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