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Accounts Receivable
 9 Months Ended
Sep. 30, 2012
Accounts Receivable [Abstract]  
Accounts Receivable
 
4.           Accounts Receivable
 
At September 30, 2012 and December 31, 2011, the Company’s accounts receivable consisted of the following:
 
   
2012
    
2011
  
Billed:
            
SG Block sales
  
$
179,826
    
$
137,560
  
Engineering services
    
168,682
      
33,317
  
Project management
    
68,061
      
19,578
  
Unbilled:
                
Engineering services
    
21,674
      
-
  
Project management
    
-
      
2,880
  
Total gross receivables
    
438,243
      
193,335
  
Less: allowance for doubtful accounts
    
(103,126)
      
(50,015)
  
Total net receivables
  
$
335,117
    
$
143,320