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Note 4 - Loans and Allowance for Loan Losses (Details Textual) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Allowance for Loan and Lease Losses, Period Increase (Decrease) | $ (79) | $ (1,167) | $ (135) | $ (1,119) | $ (1,112)
Allowance for Loan and Lease Losses, Write-offs |  |  | $ 313 | 0 | 11
Financing Receivable, Modifications, Subsequent Default, Number of Contracts |  |  | 0 |  |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment |  |  |  | $ 238 |
Minimum Loan Balance For Loans Evaluated by Risk Categories | 500 |  | $ 500 |  |
Impaired Financing Receivable, Related Allowance | 98 |  | 98 |  | 2,981
Loans and Leases Receivable, Impaired, Commitment to Lend | $ 2,271 |  | $ 2,271 |  | $ 2,427
Financing Receivable, Modifications, Number of Contracts | 3 | 0 | 3 |  |
Troubled Debt Restructurings [Member] |  |  |  |  |
Increase (Decrease) in Other Loans |  |  | $ 326 |  |
Change In Troubled Debt Restructurings |  |  | 2.00% |  |
Percentage of Loan Portfolio | 85.00% |  | 85.00% |  | 82.00%
Impaired Financing Receivable, Related Allowance | $ 98 |  | $ 98 |  | $ 546
Unsecured [Member] |  |  |  |  |
Percentage of Loan Portfolio | 5.12% |  | 5.12% |  | 5.61%
Residential Portfolio Segment [Member] |  |  |  |  |
Real Estate Acquired Through Foreclosure | $ 564 |  | $ 564 |  | $ 938
Mortgage Loans in Process of Foreclosure, Amount | $ 1,812 |  | $ 1,812 |  | $ 1,492
Financing Receivable, Modifications, Number of Contracts | 1 |  | 1 |  |

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- Definition Minimum loan balance for impaired loans on nonaccrual status or nonperforming in nature. + References No definition available. + Details
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- Definition Amount of increase (decrease) of allowance reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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