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Note 3 - Loans Leases Receivable - Troubled Debt Restructurings (Details) | 3 Months Ended
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Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($)
Number of Loans / Leases | 3 | 11
Pre-Modification Recorded Investment | $ 93,844 | $ 809,813
Post-Modification Recorded Investment | 93,844 | 809,813
Specific Allowance |  |
Payment Deferral [Member] |  |
Number of Loans / Leases |  | 1
Pre-Modification Recorded Investment |  | $ 6,263
Post-Modification Recorded Investment |  | 6,263
Specific Allowance |  |
Extended Maturity [Member] |  |
Number of Loans / Leases | 3 | 10
Pre-Modification Recorded Investment | $ 93,844 | $ 803,550
Post-Modification Recorded Investment | 93,844 | 803,550
Specific Allowance |  |
Commercial Portfolio Segment [Member] | Payment Deferral [Member] |  |
Number of Loans / Leases |  | 2
Pre-Modification Recorded Investment |  | $ 133,689
Post-Modification Recorded Investment |  | 133,689
Specific Allowance |  |
Residential Portfolio Segment [Member] | Payment Deferral [Member] |  |
Number of Loans / Leases | 1 |
Pre-Modification Recorded Investment | $ 46,320 |
Post-Modification Recorded Investment | 46,320 |
Specific Allowance |  |
Finance Leases Portfolio Segment [Member] | Payment Deferral [Member] |  |
Number of Loans / Leases |  | 1
Pre-Modification Recorded Investment |  | $ 6,263
Post-Modification Recorded Investment |  | 6,263
Specific Allowance |  |
Finance Leases Portfolio Segment [Member] | Extended Maturity [Member] |  |
Number of Loans / Leases | 2 | 8
Pre-Modification Recorded Investment | $ 47,524 | $ 669,861
Post-Modification Recorded Investment | 47,524 | 669,861
Specific Allowance |  |

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- Definition Specific allowance of amount of investment in financing receivables modified by troubled debt restructurings. + References No definition available. + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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