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Summary of Significant Accounting Policies (Summary Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash, cash equivalents and restricted cash reconciliation:      
Cash and cash equivalents $ 7,444,052 $ 1,628,136  
Restricted cash 151,016 150,477  
Total cash, cash equivalents and restricted cash $ 7,595,068 $ 1,778,613 $ 6,301,572