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Note 3 - Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Originated Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | $ 2,592,000 |  | $ 2,592,000 |  | $ 4,915,000
With no related allowance recorded, principal balance | 1,880,000 |  | 1,880,000 |  | 3,150,000
With no related allowance recorded, average recorded principal balance | 3,248,000 | $ 2,516,000 | 3,216,000 | $ 2,498,000 |
With related allowance recorded, unpaid principal balance | 5,326,000 |  | 5,326,000 |  | 5,837,000
With related allowance recorded, principal balance | 4,778,000 |  | 4,778,000 |  | 5,637,000
Related allowance | 674,000 |  | 674,000 |  | 1,867,000
With related allowance recorded, average recorded principal balance | 4,790,000 | 9,795,000 | 5,073,000 | 10,168,000 |
Total unpaid principal balance | 7,918,000 |  | 7,918,000 |  | 10,752,000
Total principal balance | 6,658,000 |  | 6,658,000 |  | 8,787,000
Total average recorded principal balance | 8,038,000 | 12,311,000 | 8,289,000 | 12,666,000 |
Originated Loan [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 872,000 |  | 872,000 |  | 3,096,000
With no related allowance recorded, principal balance | 872,000 |  | 872,000 |  | 2,014,000
With no related allowance recorded, average recorded principal balance | 2,159,000 | 1,338,000 | 2,111,000 | 1,465,000 |
With related allowance recorded, unpaid principal balance | 4,416,000 |  | 4,416,000 |  | 4,447,000
With related allowance recorded, principal balance | 3,940,000 |  | 3,940,000 |  | 4,380,000
Related allowance | 391,000 |  | 391,000 |  | 1,202,000
With related allowance recorded, average recorded principal balance | 3,945,000 | 8,687,000 | 4,091,000 | 9,240,000 |
Total unpaid principal balance | 5,288,000 |  | 5,288,000 |  | 7,543,000
Total principal balance | 4,812,000 |  | 4,812,000 |  | 6,394,000
Total average recorded principal balance | 6,104,000 | 10,025,000 | 6,202,000 | 10,705,000 |
Originated Loan [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 513,000 |  | 513,000 |  | 765,000
With no related allowance recorded, principal balance | 513,000 |  | 513,000 |  | 178,000
With no related allowance recorded, average recorded principal balance | 373,000 | 861,000 | 308,000 | 1,073,000 |
With related allowance recorded, unpaid principal balance | 2,390,000 |  | 2,390,000 |  | 3,038,000
With related allowance recorded, principal balance | 2,045,000 |  | 2,045,000 |  | 2,989,000
Related allowance | 198,000 |  | 198,000 |  | 963,000
With related allowance recorded, average recorded principal balance | 2,089,000 | 3,584,000 | 2,389,000 | 3,183,000 |
Originated Loan [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 99,000 |  | 99,000 |  | 454,000
With no related allowance recorded, principal balance | 99,000 |  | 99,000 |  | 35,000
With no related allowance recorded, average recorded principal balance | 50,000 | 73,000 | 45,000 | 80,000 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
With related allowance recorded, average recorded principal balance | 0 | 499,000 | 0 | 665,000 |
Originated Loan [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 31,000 |  | 31,000 |  | 1,528,000
With no related allowance recorded, principal balance | 31,000 |  | 31,000 |  | 1,452,000
With no related allowance recorded, average recorded principal balance | 1,453,000 | 272,000 | 1,453,000 | 181,000 |
With related allowance recorded, unpaid principal balance | 1,882,000 |  | 1,882,000 |  | 1,409,000
With related allowance recorded, principal balance | 1,753,000 |  | 1,753,000 |  | 1,391,000
Related allowance | 168,000 |  | 168,000 |  | 239,000
With related allowance recorded, average recorded principal balance | 1,713,000 | 1,606,000 | 1,606,000 | 1,373,000 |
Originated Loan [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With no related allowance recorded, principal balance | 0 |  | 0 |  | 0
With no related allowance recorded, average recorded principal balance | 0 | 0 | 0 | 0 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
With related allowance recorded, average recorded principal balance | 0 | 2,479,000 | 0 | 3,326,000 |
Originated Loan [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 229,000 |  | 229,000 |  | 349,000
With no related allowance recorded, principal balance | 229,000 |  | 229,000 |  | 349,000
With no related allowance recorded, average recorded principal balance | 283,000 | 132,000 | 305,000 | 131,000 |
With related allowance recorded, unpaid principal balance | 144,000 |  | 144,000 |  | 0
With related allowance recorded, principal balance | 142,000 |  | 142,000 |  | 0
Related allowance | 25,000 |  | 25,000 |  | 0
With related allowance recorded, average recorded principal balance | 143,000 | 519,000 | 96,000 | 693,000 |
Originated Loan [Member] | Retail Portfolio Segment [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 1,720,000 |  | 1,720,000 |  | 1,819,000
With no related allowance recorded, principal balance | 1,008,000 |  | 1,008,000 |  | 1,136,000
With no related allowance recorded, average recorded principal balance | 1,089,000 | 1,178,000 | 1,105,000 | 1,033,000 |
With related allowance recorded, unpaid principal balance | 910,000 |  | 910,000 |  | 1,390,000
With related allowance recorded, principal balance | 838,000 |  | 838,000 |  | 1,257,000
Related allowance | 283,000 |  | 283,000 |  | 665,000
With related allowance recorded, average recorded principal balance | 845,000 | 1,108,000 | 982,000 | 928,000 |
Total unpaid principal balance | 2,630,000 |  | 2,630,000 |  | 3,209,000
Total principal balance | 1,846,000 |  | 1,846,000 |  | 2,393,000
Total average recorded principal balance | 1,934,000 | 2,286,000 | 2,087,000 | 1,961,000 |
Originated Loan [Member] | Retail Portfolio Segment [Member] | Home Equity and Other [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 636,000 |  | 636,000 |  | 693,000
With no related allowance recorded, principal balance | 617,000 |  | 617,000 |  | 680,000
With no related allowance recorded, average recorded principal balance | 684,000 | 531,000 | 683,000 | 392,000 |
With related allowance recorded, unpaid principal balance | 500,000 |  | 500,000 |  | 1,225,000
With related allowance recorded, principal balance | 490,000 |  | 490,000 |  | 1,147,000
Related allowance | 232,000 |  | 232,000 |  | 652,000
With related allowance recorded, average recorded principal balance | 494,000 | 993,000 | 712,000 | 799,000 |
Originated Loan [Member] | Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 1,084,000 |  | 1,084,000 |  | 1,126,000
With no related allowance recorded, principal balance | 391,000 |  | 391,000 |  | 456,000
With no related allowance recorded, average recorded principal balance | 405,000 | 647,000 | 422,000 | 641,000 |
With related allowance recorded, unpaid principal balance | 410,000 |  | 410,000 |  | 165,000
With related allowance recorded, principal balance | 348,000 |  | 348,000 |  | 110,000
Related allowance | 51,000 |  | 51,000 |  | 13,000
With related allowance recorded, average recorded principal balance | 351,000 | 115,000 | 270,000 | 129,000 |
Acquired Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 5,366,000 |  | 5,366,000 |  | 5,938,000
With no related allowance recorded, principal balance | 4,376,000 |  | 4,376,000 |  | 4,795,000
With no related allowance recorded, average recorded principal balance | 4,377,000 | 5,523,000 | 4,517,000 | 5,313,000 |
With related allowance recorded, unpaid principal balance | 35,000 |  | 35,000 |  | 0
With related allowance recorded, principal balance | 35,000 |  | 35,000 |  | 0
Related allowance | 35,000 |  | 35,000 |  | 0
With related allowance recorded, average recorded principal balance | 816,000 | 233,000 | 545,000 | 235,000 |
Total unpaid principal balance | 5,401,000 |  | 5,401,000 |  | 5,938,000
Total principal balance | 4,411,000 |  | 4,411,000 |  | 4,795,000
Total average recorded principal balance | 5,193,000 | 5,756,000 | 5,062,000 | 5,548,000 |
Acquired Loan [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 2,035,000 |  | 2,035,000 |  | 2,541,000
With no related allowance recorded, principal balance | 1,612,000 |  | 1,612,000 |  | 2,135,000
With no related allowance recorded, average recorded principal balance | 1,667,000 | 3,346,000 | 1,824,000 | 3,202,000 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
With related allowance recorded, average recorded principal balance | 799,000 | 62,000 | 533,000 | 64,000 |
Total unpaid principal balance | 2,035,000 |  | 2,035,000 |  | 2,541,000
Total principal balance | 1,612,000 |  | 1,612,000 |  | 2,135,000
Total average recorded principal balance | 2,466,000 | 3,408,000 | 2,357,000 | 3,266,000 |
Acquired Loan [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 717,000 |  | 717,000 |  | 1,039,000
With no related allowance recorded, principal balance | 708,000 |  | 708,000 |  | 1,021,000
With no related allowance recorded, average recorded principal balance | 720,000 | 1,146,000 | 821,000 | 1,040,000 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
With related allowance recorded, average recorded principal balance | 0 | 15,000 | 0 | 16,000 |
Acquired Loan [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With no related allowance recorded, principal balance | 0 |  | 0 |  | 0
With no related allowance recorded, average recorded principal balance | 0 | 17,000 | 0 | 11,000 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
With related allowance recorded, average recorded principal balance | 0 | 0 | 0 | 0 |
Acquired Loan [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 1,035,000 |  | 1,035,000 |  | 1,027,000
With no related allowance recorded, principal balance | 639,000 |  | 639,000 |  | 659,000
With no related allowance recorded, average recorded principal balance | 677,000 | 1,125,000 | 671,000 | 1,153,000 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
With related allowance recorded, average recorded principal balance | 799,000 | 47,000 | 533,000 | 48,000 |
Acquired Loan [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 225,000 |  | 225,000 |  | 238,000
With no related allowance recorded, principal balance | 225,000 |  | 225,000 |  | 237,000
With no related allowance recorded, average recorded principal balance | 228,000 | 837,000 | 231,000 | 821,000 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
With related allowance recorded, average recorded principal balance | 0 | 0 | 0 | 0 |
Acquired Loan [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 58,000 |  | 58,000 |  | 237,000
With no related allowance recorded, principal balance | 40,000 |  | 40,000 |  | 218,000
With no related allowance recorded, average recorded principal balance | 42,000 | 221,000 | 101,000 | 177,000 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
With related allowance recorded, average recorded principal balance | 0 | 0 | 0 | 0 |
Acquired Loan [Member] | Retail Portfolio Segment [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 3,331,000 |  | 3,331,000 |  | 3,397,000
With no related allowance recorded, principal balance | 2,764,000 |  | 2,764,000 |  | 2,660,000
With no related allowance recorded, average recorded principal balance | 2,710,000 | 2,177,000 | 2,693,000 | 2,111,000 |
With related allowance recorded, unpaid principal balance | 35,000 |  | 35,000 |  | 0
With related allowance recorded, principal balance | 35,000 |  | 35,000 |  | 0
Related allowance | 35,000 |  | 35,000 |  | 0
With related allowance recorded, average recorded principal balance | 17,000 | 171,000 | 12,000 | 171,000 |
Total unpaid principal balance | 3,366,000 |  | 3,366,000 |  | 3,397,000
Total principal balance | 2,799,000 |  | 2,799,000 |  | 2,660,000
Total average recorded principal balance | 2,727,000 | 2,348,000 | 2,705,000 | 2,282,000 |
Acquired Loan [Member] | Retail Portfolio Segment [Member] | Home Equity and Other [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 818,000 |  | 818,000 |  | 694,000
With no related allowance recorded, principal balance | 771,000 |  | 771,000 |  | 507,000
With no related allowance recorded, average recorded principal balance | 710,000 | 366,000 | 642,000 | 361,000 |
With related allowance recorded, unpaid principal balance | 35,000 |  | 35,000 |  | 0
With related allowance recorded, principal balance | 35,000 |  | 35,000 |  | 0
Related allowance | 35,000 |  | 35,000 |  | 0
With related allowance recorded, average recorded principal balance | 17,000 | 0 | 12,000 | 0 |
Acquired Loan [Member] | Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 2,513,000 |  | 2,513,000 |  | 2,703,000
With no related allowance recorded, principal balance | 1,993,000 |  | 1,993,000 |  | 2,153,000
With no related allowance recorded, average recorded principal balance | 2,000,000 | 1,811,000 | 2,051,000 | 1,750,000 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | $ 0
With related allowance recorded, average recorded principal balance | $ 0 | $ 171,000 | $ 0 | $ 171,000 |

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524 + Details
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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
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