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Statements of Financial Condition (Parenthetical) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statements of Financial Condition      
Cash and cash equivalents $ 6,497,522 $ 2,990,732 $ 5,167,367
Cash and cash equivalents $ 845,621 $ 803,973 $ 596,555