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Accounts Receivable
3 Months Ended
Mar. 31, 2017
Accounts Receivable [Abstract]  
Accounts Receivable
4.Accounts Receivable

 

At March 31, 2017 and December 31, 2016, the Company’s accounts receivable consisted of the following:

 

  2017  2016 
Billed:      
SG Block sales $57,997  $124,713 
Engineering services  84,281   144,040 
Project management  -   - 
Total gross receivables  142,278   268,753 
Less: allowance for doubtful accounts  (34,235)  (34,235)
Total net receivables $108,043  $234,518