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Costs and Estimated Earnings on Uncompleted Contracts (Tables) | 3 Months Ended
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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 | )

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