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Note 3 - Loans Leases Receivable - Textual (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 USD ($) item | Dec. 31, 2017 USD ($) | Jun. 30, 2017 USD ($) item | Jun. 30, 2018 USD ($) lease item | Jun. 30, 2017 USD ($) lease item | Dec. 31, 2017 USD ($)
Loans and leases | $ 3,105,901,458 | $ 2,956,713,493 |  | $ 3,105,901,458 |  | $ 2,956,713,493
Loans and leases receivable loss | 0 |  | $ 0 | 0 | $ 0 |
Financing Receivable, Recorded Investment, Nonaccrual Status | 12,553,800 | 11,441,234 |  | 12,553,800 |  | 11,441,234
Financing Receivable, Modifications, Recorded Investment | $ 3,168,014 | 9,394,967 |  | $ 3,168,014 |  | 9,394,967
Financing Receivable, Modifications, Number of Contracts |  |  | 17 | 3 | 28 |
Financing Receivable, Modifications, Post-Modification Recorded Investment |  |  | $ 948,170 | $ 93,844 | $ 1,757,983 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | item | 7 |  | 2 | 7 | 2 |
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down |  | 195,000 |  | $ 577,377 |  | 65,623
One Customer [Member] |  |  |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment |  |  |  | 78,000 |  |
Other Customers [Member] |  |  |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment |  |  |  | $ 378,000 |  |
Nonaccrual [Member] |  |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | item |  |  |  | 1 |  |
Financing Receivable, Modifications, Post-Modification Recorded Investment |  |  |  | $ 46,320 | $ 0 |
Troubled Debt Restructurings [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | $ 1,841,006 | 2,282,495 |  | 1,841,006 |  | 2,282,495
Residential Portfolio Segment [Member] |  |  |  |  |  |
Loans and leases | 257,433,713 | 258,646,265 |  | 257,433,713 |  | 258,646,265
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage | 1,033,700 | 645,001 |  | 1,033,700 |  | 645,001
Financing Receivable, Recorded Investment, Nonaccrual Status | 1,315,151 | 1,363,806 |  | 1,315,151 |  | 1,363,806
Residential Portfolio Segment [Member] | Troubled Debt Restructurings [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 83,287 | 115,190 |  | 83,287 |  | 115,190
Commercial Portfolio Segment [Member] |  |  |  |  |  |
Loans and leases | 1,273,000,094 | 1,134,516,315 |  | 1,273,000,094 |  | 1,134,516,315
Financing Receivable, Recorded Investment, Nonaccrual Status | 1,485,295 | 1,231,353 |  | 1,485,295 |  | 1,231,353
Commercial Portfolio Segment [Member] | Troubled Debt Restructurings [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 66,021 | 122,598 |  | 66,021 |  | 122,598
Commercial Portfolio Segment [Member] | m2 Lease Funds, LLC [Member] |  |  |  |  |  |
Loans and leases | 92,815,742 | 66,758,397 |  | 92,815,742 |  | 66,758,397
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Loans and leases | 1,349,318,914 | 1,303,491,882 |  | 1,349,318,914 |  | 1,303,491,882
Commercial Real Estate Portfolio Segment [Member] | Troubled Debt Restructurings [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 1,066,701 | 1,336,871 |  | 1,066,701 |  | 1,336,871
Finance Leases Portfolio Segment [Member] |  |  |  |  |  |
Loans and leases | 133,196,613 | 141,448,232 |  | 133,196,613 |  | 141,448,232
Financing Receivable, Recorded Investment, Nonaccrual Status | 2,529,004 | 2,175,044 |  | 2,529,004 |  | 2,175,044
Finance Leases Portfolio Segment [Member] | Troubled Debt Restructurings [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | 619,727 | 700,255 |  | 619,727 |  | 700,255
Consumer Portfolio Segment [Member] |  |  |  |  |  |
Loans and leases | 92,952,124 | 118,610,799 |  | 92,952,124 |  | 118,610,799
Financing Receivable, Recorded Investment, Nonaccrual Status | 202,390 | 249,091 |  | 202,390 |  | 249,091
Consumer Portfolio Segment [Member] | Troubled Debt Restructurings [Member] |  |  |  |  |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | $ 5,270 | $ 7,581 |  | $ 5,270 |  | $ 7,581

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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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- Definition The amount of the outstanding recorded investment related to 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 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 + Details
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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 + Details
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