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Accounts Receivable
12 Months Ended
Dec. 31, 2017
Accounts Receivable [Abstract]  
Accounts Receivable
4.Accounts Receivable

 

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

 

   2017  2016 
 Billed:      
 Construction revenue $2,470,526  $124,713 
 Engineering services  196,008   144,040 
 Retainage receivable  373,576   - 
 Total gross receivables  3,040,110   268,753 
 Less: allowance for doubtful accounts  (34,235)  (34,235)
 Total net receivables $3,005,875  $234,518