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CASH AND RESTRICTED CASH RECONCILIATION (Unaudited) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Cash And Restricted Cash Reconciliation        
Cash $ 6,289,008 $ 5,615,073 $ 3,074,147  
Restricted cash 42,600,430 26,050,668 18,464,027  
Total cash and restricted cash $ 48,889,438 $ 31,665,741 $ 21,538,174 $ 17,164,757