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Summary of Significant Accounting Policies (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Accounting Policies [Line Items] |  |
Federal Reserve Bank, reserve requirement | $ 16,546,000 | $ 15,208,000
Foreclosed assets | 3,254,392 | 2,386,239
Amortization of intangible assets | 346,435 | 305,452
Impairment of intangible assets | 0 |
Advertising Expense | 637,600 | 615,751
Residential Real Estate [Member] |  |
Accounting Policies [Line Items] |  |
Foreclosed assets | 545,750 | 1,500
Mortgage loans in process of foreclosure | $ 0 | $ 0
Minimum [Member] | Building and Leasehold Improvements [Member] |  |
Accounting Policies [Line Items] |  |
Useful life | 15 years |
Minimum [Member] | Furniture and Equipment [Member] |  |
Accounting Policies [Line Items] |  |
Useful life | 3 years |
Maximum [Member] | Building and Leasehold Improvements [Member] |  |
Accounting Policies [Line Items] |  |
Useful life | 40 years |
Maximum [Member] | Furniture and Equipment [Member] |  |
Accounting Policies [Line Items] |  |
Useful life | 7 years |

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- Definition Amount of cash or deposit reserve required to be maintained with federal reserve bank. + References No definition available. + Details
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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