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ACCOUNTS RECEIVABLE (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Receivables [Abstract]    
Billed receivables $ 7,260,457 $ 8,944,596
Less: allowance for doubtful accounts (230,855) (222,025)
Total accounts receivable, net $ 7,029,602 $ 8,722,571