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OTHER ACCRUED LIABILITIES (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
OTHER ACCRUED LIABILITIES    
Prepayments from customers $ 1,387,491 $ 998,601
Accrued property taxes 351,000  
Accrued professional fees 202,979 263,757
Current portion - preferred stock repurchase 952,381  
Other accrued expenses 138,179 124,791
Total $ 3,032,030 $ 1,387,149