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Note 3 - Impaired Loans (Details) - USD ($) | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Commercial Portfolio Segment [Member] |  |
With no allowance recorded, recorded investment | $ 295,000 |
With no allowance recorded, unpaid principal balance | 327,000 | 96,000
With allowance recorded, recorded investment | 2,977,000 |
With allowance recorded, unpaid principal balance | 2,977,000 |
Related allowance | 2,977,000 |
Recorded investment | 3,272,000 |
Unpaid principal balance | 3,304,000 | 96,000
Commercial Real Estate Portfolio Segment [Member] |  |
With no allowance recorded, recorded investment | 6,526,000 | 7,745,000
With no allowance recorded, unpaid principal balance | 7,031,000 | 8,259,000
With allowance recorded, recorded investment |  |
With allowance recorded, unpaid principal balance |  |
Related allowance |  |
Recorded investment | 6,526,000 | 7,745,000
Unpaid principal balance | 7,031,000 | 8,259,000
Construction Portfolio Segment [Member] |  |
With no allowance recorded, recorded investment |  |
With no allowance recorded, unpaid principal balance | 287,000 | 287,000
With allowance recorded, recorded investment |  |
With allowance recorded, unpaid principal balance |  |
Related allowance |  |
Recorded investment |  |
Unpaid principal balance | 287,000 | 287,000
Residential Portfolio Segment [Member] |  |
With no allowance recorded, recorded investment | 4,515,000 | 4,556,000
With no allowance recorded, unpaid principal balance | 5,518,000 | 5,559,000
With allowance recorded, recorded investment |  |
With allowance recorded, unpaid principal balance |  |
Related allowance |  |
Recorded investment | 4,515,000 | 4,556,000
Unpaid principal balance | 5,518,000 | 5,559,000
Construction to Permanent Portfolio Segment [Member] |  |
With no allowance recorded, recorded investment |  |
With no allowance recorded, unpaid principal balance |  |
Consumer Portfolio Segment [Member] |  |
With no allowance recorded, recorded investment | 544,000 | 547,000
With no allowance recorded, unpaid principal balance | 629,000 | 633,000
With allowance recorded, recorded investment | 2,000 | 3,000
With allowance recorded, unpaid principal balance | 2,000 | 3,000
Related allowance | 2,000 | 3,000
Recorded investment | 546,000 | 550,000
Unpaid principal balance | 631,000 | 636,000
With no allowance recorded, recorded investment | 11,880,000 | 12,848,000
With no allowance recorded, unpaid principal balance | 13,792,000 | 14,834,000
With allowance recorded, recorded investment | 2,979,000 | 3,000
With allowance recorded, unpaid principal balance | 2,979,000 | 3,000
Related allowance | 2,979,000 | 3,000
Recorded investment | 14,859,000 | 12,851,000
Unpaid principal balance | $ 16,771,000 | $ 14,837,000

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953550-111524 + Details
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