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Note 3 - Loans Leases Receivable (Details Textual) | 3 Months Ended
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Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Mar. 31, 2016 USD ($)
Financing Receivable, Recorded Investment, Nonaccrual Status | $ 14,205,302 | $ 13,919,066 |  |
Financing Receivable, Modifications, Recorded Investment | $ 8,673,673 | 8,647,007 |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 2 |  |  | 0
Financing Receivable, Modifications, Number of Contracts | 11 |  |  | 5
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down |  | 195,000 |  |
Losses on Residual Value | $ 0 |  |  | $ 0
Nonaccrual [Member] |  |  |  |
Financing Receivable, Modifications, Number of Contracts | 0 |  |  |
Troubled Debt Restructurings [Member] |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | $ 2,444,944 | $ 2,300,479 |  |
Financing Receivable, Modifications, Number of Contracts |  | 2 |  |
Residential Portfolio Segment [Member] |  |  |  |
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage | 1,051,000 | $ 1,135,500 |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 1,199,921 | 1,075,639 | [1] |
Residential Portfolio Segment [Member] | Troubled Debt Restructurings [Member] |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 42,525 | 43,579 |  |
Commercial Portfolio Segment [Member] |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 4,464,937 | 4,187,786 | [1] |
Commercial Portfolio Segment [Member] | Troubled Debt Restructurings [Member] |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 278,391 | 48,501 |  |
Commercial Real Estate Portfolio Segment [Member] | Troubled Debt Restructurings [Member] |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 1,353,634 | 1,380,047 |  |
Finance Leases Portfolio Segment [Member] |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 2,399,232 | 2,446,181 | [1] |
Finance Leases Portfolio Segment [Member] | Troubled Debt Restructurings [Member] |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 759,346 | 816,149 |  |
Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 207,151 | 87,344 | [1] |
Consumer Portfolio Segment [Member] | Troubled Debt Restructurings [Member] |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | $ 11,048 | $ 12,203 |  |
[1] | Nonaccrual loans/leases included $2,300,479 of TDRs, including $48,501 in C&I loans, $1,380,047 in CRE loans, $816,149 in direct financing leases, $43,579 in residential real estate loans, and $12,203 in installment loans.

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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 The amount of the outstanding recorded investment related to 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 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554 + Details
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