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Note 4 - Loans Leases Receivable - Troubled Debt Restructurings (Details) | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Number of Loans / Leases | 35 | 29
Pre-Modification Recorded Investment | $ 2,752,344 | $ 7,880,881
Post-Modification Recorded Investment | 2,752,344 | 7,880,881
Specific Allowance | $ 62,596 | $ 1,225,716
Extended Maturity [Member] |  |
Number of Loans / Leases | 3 | 8
Pre-Modification Recorded Investment | $ 115,236 | $ 935,221
Post-Modification Recorded Investment | 115,236 | 935,221
Specific Allowance |  | $ 286,735
Payment Deferral [Member] |  |
Number of Loans / Leases | 32 | 20
Pre-Modification Recorded Investment | $ 2,637,108 | $ 5,711,920
Post-Modification Recorded Investment | 2,637,108 | 5,711,920
Specific Allowance | $ 62,596 | $ 938,981
Interest Rate Below Market Reduction [Member] |  |
Number of Loans / Leases |  | 1
Pre-Modification Recorded Investment |  | $ 1,233,740
Post-Modification Recorded Investment |  | 1,233,740
Specific Allowance |  |
Finance Leases Portfolio Segment [Member] | Extended Maturity [Member] |  |
Number of Loans / Leases | 3 | 4
Pre-Modification Recorded Investment | $ 115,236 | $ 410,653
Post-Modification Recorded Investment | 115,236 | 410,653
Specific Allowance |  | $ 38,476
Finance Leases Portfolio Segment [Member] | Payment Deferral [Member] |  |
Number of Loans / Leases | 24 | 13
Pre-Modification Recorded Investment | $ 1,703,255 | $ 1,149,493
Post-Modification Recorded Investment | 1,703,255 | 1,149,493
Specific Allowance |  | $ 125,940
Commercial Portfolio Segment [Member] | Extended Maturity [Member] |  |
Number of Loans / Leases |  | 3
Pre-Modification Recorded Investment |  | $ 247,476
Post-Modification Recorded Investment |  | 247,476
Specific Allowance |  | $ 60,767
Commercial Portfolio Segment [Member] | Payment Deferral [Member] |  |
Number of Loans / Leases | 7 | 7
Pre-Modification Recorded Investment | $ 826,531 | $ 4,562,427
Post-Modification Recorded Investment | 826,531 | 4,562,427
Specific Allowance | $ 62,596 | $ 813,041
Residential Portfolio Segment [Member] | Extended Maturity [Member] |  |
Number of Loans / Leases |  | 1
Pre-Modification Recorded Investment |  | $ 277,092
Post-Modification Recorded Investment |  | 277,092
Specific Allowance |  | $ 187,492
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |
Number of Loans / Leases | 1 |
Pre-Modification Recorded Investment | $ 107,322 |
Post-Modification Recorded Investment | 107,322 |
Specific Allowance |  |
Commercial Real Estate Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |
Number of Loans / Leases |  | 1
Pre-Modification Recorded Investment |  | $ 1,233,740
Post-Modification Recorded Investment |  | 1,233,740
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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