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Summary of Significant Accounting Policies (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Summary of Significant Accounting Policies    
Collateralized bank repurchase agreement (1) $ 2,228,779 $ 941,792
Money market funds 17,272,985 12,583,957
Total $ 19,501,764 $ 13,525,749