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Accounts Receivable (Tables)
3 Months Ended
Mar. 31, 2015
Accounts Receivable [Abstract]  
Summary of accounts receivable
  2015  2014 
Billed:      
SG Block sales $348,526  $172,837 
Engineering services  -   2,000 
Project management  15,842   15,842 
Total gross receivables  364,368   190,679 
Less: allowance for doubtful accounts  (24,746)  (24,746)
Total net receivables $339,622  $165,933