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ACCOUNTS RECEIVABLE (Tables)
12 Months Ended
Dec. 31, 2020
Receivables [Abstract]  
Accounts receivable consists of trade receivables as follows:

Accounts receivable consists of trade receivables as follows:

 

              
  December 31, 
  2020    2019 
Billed receivables $5,226,468    $7,260,457 
Less: allowance for doubtful accounts  (263,562)    (230,855)
        Total accounts receivable, net $4,962,906    $7,029,602