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The following table provides a reconciliation of cash and restricted cash reported within the statement of cash flows that sum to the total of the same such amounts shown in the statement of cash flows: (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash and Cash Equivalents [Abstract]      
Cash $ 6,033,537 $ 4,052,109  
Restricted cash 1,380,684  
Total cash and restricted cash shown in the statement of cash flow $ 6,033,537 $ 5,432,793 $ 6,128,142