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Costs and Estimated Earnings on Uncompleted Contracts (Tables)

3 Months Ended

Mar. 31, 2013

Costs and Estimated Earnings On Uncompleted Contracts [Abstract]

Summary of costs and estimated earnings on uncompleted contracts

		2013				2012
Costs incurred on uncompleted contracts		$	317,022			$	177,529
Provision for loss on uncompleted contracts			(58,433	)			(6,680	)
Estimated earnings			72,710				19,516
			331,299				190,365
Less: billings to date			(316,552	)			(223,678	)

		$	14,747			$	(33,313	)

Summary of costs and estimated earnings amounts on uncompleted contracts included in balance sheets

		2013				2012
Costs and estimated earnings in excess of billings on uncompleted contracts		$	157,871			$	36,476
Billings in excess of cost and estimated earnings on uncompleted contracts			(143,124	)			(69,789	)
		$	14,747			$	(33,313	)