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OTHER ACCRUED LIABILITIES (Details) - USD ($)
Mar. 31, 2022
Dec. 31, 2021
OTHER ACCRUED LIABILITIES    
Prepayments from customers $ 2,470,949 $ 2,339,530
Accrued property taxes 292,741  
Accrued professional fees 290,828 185,515
Current portion - preferred stock repurchase 1,058,935 1,098,282
Other accrued expenses 216,698 102,200
Total $ 4,330,151 $ 3,725,527