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Costs and Estimated Earnings on Uncompleted Contracts (Details) (USD $) | Sep. 30, 2013 | Dec. 31, 2012
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Summary of costs and estimated earnings on uncompleted contracts |  |
Costs incurred on uncompleted contracts | $ 735,025 | $ 177,529
Provision for loss on uncompleted contracts | 10,177 | 6,680
Estimated income (loss) | (25,249) | 6,156
Cost on uncompleted contracts, net | 719,953 | 190,365
Less: billings to date | (422,582) | (223,678)
Cost in excess of billing on uncompleted contracts, net | $ 297,371 | $ (33,313)

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