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Accounts receivable (Tables)
9 Months Ended
Sep. 30, 2017
Receivables [Abstract]  
Schedule of Accounts receivable

    September 30, 2017   December 31, 2016
         
Customer receivables   $ 37,806     $ 14,432  
Less:  Allowance for uncollectible accounts     (35,381 )     (14,401 )
    $ 2,425     $ 31