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Note 6 - Fair Value - Assets Measured At Fair Value On a Recurring and Nonrecurring Basis (Details) - USD ($) | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Securities available for sale, fair value | $ 257,944,671 | $ 272,907,907
Fair Value, Measurements, Recurring [Member] |  |
Assets Fair Value | 264,822,702 | 277,811,845
Liabilities Fair Value | 6,543,790 | 4,397,238
Fair Value, Measurements, Recurring [Member] | Interest rate cap |  |
Interest rate | 706,291 | 506,700
Fair Value, Measurements, Recurring [Member] | Interest rate swap |  |
Interest rate | 6,171,740 | 4,397,238
Derivative Liabilities | 6,543,790 | 4,397,238
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Assets Fair Value |  | 1,028
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Assets Fair Value | 264,822,702 | 277,810,817
Liabilities Fair Value | 6,543,790 | 4,397,238
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest rate cap |  |
Interest rate | 706,291 | 506,700
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest rate swap |  |
Interest rate | 6,171,740 | 4,397,238
Derivative Liabilities | 6,543,790 | 4,397,238
Fair Value, Measurements, Nonrecurring [Member] |  |
Assets Fair Value | 18,444,243 | 23,615,310
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets Fair Value | 18,444,243 | 23,615,310
US Government Agencies Debt Securities [Member] |  |
Securities available for sale, fair value | 35,666,536 | 38,096,534
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale, fair value | 35,666,536 | 38,096,534
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available for sale, fair value | 35,666,536 | 38,096,534
Residential Mortgage Backed Securities [Member] |  |
Securities available for sale, fair value | 158,534,448 | 163,301,304
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale, fair value | 158,534,448 | 163,301,304
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available for sale, fair value | 158,534,448 | 163,301,304
US States and Political Subdivisions Debt Securities [Member] |  |
Securities available for sale, fair value | 59,507,267 | 66,625,496
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale, fair value | 59,507,267 | 66,625,496
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available for sale, fair value | 59,507,267 | 66,625,496
Other Securities [Member] |  |
Securities available for sale, fair value | 4,236,420 | 4,884,573
Other Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Securities available for sale, fair value | 4,236,420 | 4,884,573
Other Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Securities available for sale, fair value |  | 1,028
Other Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Securities available for sale, fair value | 4,236,420 | 4,883,545
Impaired Loans Leases [Member] |  |
Assets Fair Value | 4,674,218 | 8,972,337
Impaired Loans Leases [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets Fair Value | 4,674,218 | 8,972,337
Impaired Loans Leases [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets Fair Value | 4,674,218 | 8,972,337
Other Real Estate Owned [Member] |  |
Assets Fair Value | 13,770,025 | 14,642,973
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Other Real Estate Owned Fair Value | 13,770,025 | 14,642,973
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Other Real Estate Owned Fair Value | $ 13,770,025 | $ 14,642,973

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