Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable

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Accounts Receivable
 6 Months Ended
Jun. 30, 2018
Receivables [Abstract]  
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Note 3 – Accounts Receivable
 
Accounts receivable, net consisted of the following:
 
   
June 30,
2018
    
December 31,
2017
  
   
(unaudited)
        
Trade receivables   $ 198,265     $ 378,894  
Other receivables     1,652       20,589  
      199,917       399,483  
Allowance for doubtful accounts     (29,125 )     (178,399 )
    $ 170,792     $ 221,084  
 
The Company had receivable balances from three customers that accounted for 70% of net trade receivables at June 30, 2018.
 
Activity in the allowance for doubtful accounts was as follows:
 
Balance at December 31, 2017   $ (178,399 )
Write offs     16,759  
Provisions     (29,485 )
Recovery     162,000  
Balance at June 30, 2018   $ (29,125 )