Accounts Receivable

12 Months Ended

Dec. 31, 2012

Accounts Receivable [Abstract]

Accounts Receivable

4.     Accounts Receivable

At December 31, 2012 and 2011, the Company’s accounts receivable consisted of the following:

	2012			2011
Billed:
SG block sales	$	207,390		$	137,560
Engineering services		216,535			33,317
Project management		34,900			19,578
Unbilled:
Project management		-			2,880
Total gross receivables		458,825			193,335
Less: allowance for doubtful accounts		(174,430	)		(50,015	)
Total net receivables	$	284,395		$	143,320