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ACCOUNTS RECEIVABLE (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
ACCOUNTS RECEIVABLE    
Accounts receivable $ 2,165,932 $ 1,817,767
Allowance for doubtful accounts (10,774) (49,963)
Accounts receivable, net $ 2,155,158 $ 1,767,804