Accounts Receivable

6 Months Ended

Jun. 30, 2012

Receivables [Abstract]

Accounts Receivable

4.           Accounts Receivable

At June 30, 2012 and December 31, 2011, the Company’s accounts receivable consisted of the following:

	2012			2011
Billed:
SG Block sales	$	155,416		$	137,560
Engineering services		52,558			33,317
Project management		96,020			19,578
Unbilled:
Engineering services		92,978			-
Project management		-			2,880
Total gross receivables		396,972			193,335
Less: allowance for doubtful accounts		(103,126	)		(50,015	)
Total net receivables	$	293,846		$	143,320