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Fair Value of Financial Instruments - Schedule of Unrealized Losses and Fair Value of Investment Securities (Details) - USD ($) | Sep. 30, 2018 | Dec. 31, 2017
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Fair Value Disclosures [Abstract] |  |
Less than 12 months, unrealized gains, fair value | $ 10,845,595 | $ 748,148
Less than 12 months, unrealized losses, fair value | 7,734,136 | 11,975,872
Investment securities - available for sale, at fair value | 18,579,731 | 12,724,020
Less than 12 months, unrealized gains | 27,352 | 570
Less than 12 months, unrealized losses | (6,392) | (10,734)
Unrealized gains (losses) | $ (20,960) | $ (10,164)

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