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Statements of Cash Flows [Parenthetical] - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Components of Cash and Cash Equivalents:      
Cash and Cash Equivalents $ 62,639,874 $ 78,344,087 $ 103,167,056
Equity in Trading Accounts:      
Cash and Cash Equivalents 17,417,768 14,167,416 8,297,821
Total Cash, Cash Equivalents and Equity in Trading Accounts $ 80,057,642 $ 92,511,503 $ 111,464,877