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Note 3 - Loans Leases Receivable - Troubled Debt Restructurings (Details) | 3 Months Ended
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Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($)
Number of Loans / Leases | 11 | 5
Pre-Modification Recorded Investment | $ 809,813 | $ 456,592
Post-Modification Recorded Investment | 809,813 | 456,592
Specific Allowance |  |
Extended Maturity [Member] |  |
Number of Loans / Leases | 1 | 4
Pre-Modification Recorded Investment | $ 6,263 | $ 410,653
Post-Modification Recorded Investment | 6,263 | 410,653
Specific Allowance |  |
Payment Deferral [Member] |  |
Number of Loans / Leases | 10 | 1
Pre-Modification Recorded Investment | $ 803,550 | $ 45,939
Post-Modification Recorded Investment | 803,550 | 45,939
Specific Allowance |  |
Finance Leases Portfolio Segment [Member] | Extended Maturity [Member] |  |
Number of Loans / Leases | 1 | 4
Pre-Modification Recorded Investment | $ 6,263 | $ 410,653
Post-Modification Recorded Investment | 6,263 | 410,653
Specific Allowance |  |
Finance Leases Portfolio Segment [Member] | Payment Deferral [Member] |  |
Number of Loans / Leases | 8 | 1
Pre-Modification Recorded Investment | $ 669,861 | $ 45,939
Post-Modification Recorded Investment | 669,861 | 45,939
Specific Allowance |  |
Commercial Portfolio Segment [Member] | Extended Maturity [Member] |  |
Number of Loans / Leases | 2 |
Pre-Modification Recorded Investment | $ 133,689 |
Post-Modification Recorded Investment | 133,689 |
Specific Allowance |  |

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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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