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OTHER ACCRUED LIABILITIES (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
OTHER ACCRUED LIABILITIES    
Prepayments from customers $ 273,584 $ 998,601
Accrued property taxes 117,000  
Accrued professional fees 303,000 263,757
Other accrued expenses 129,298 124,791
Total $ 822,882 $ 1,387,149