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RECONCILIATION OF CASH - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]        
Cash $ 6,559,678 $ 7,829,453 $ 9,424,385  
Restricted cash 58,773,488 48,100,951 45,424,829  
Total cash and restricted cash $ 65,333,166 $ 55,930,404 $ 54,849,214 $ 45,572,305