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Consolidated Statements of Operations and Comprehensive Income - Parenthetical - USD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Statement [Abstract] |  |  |
Unrealized gains on available for sale securities, tax | $ 0 | $ 186,384 | $ 0
Reclassification adjustment for gains include in net income, tax | $ 0 | $ 189,633 | $ 0

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