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Costs incurred and estimated earnings net of billings on uncompleted contracts | 12 Months Ended
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Dec. 31, 2015
Contractors [Abstract] |
Costs incurred and estimated earnings net of billings on uncompleted contracts | Costs incurred and estimated earnings net of billings on uncompleted contracts
|  | December 31, 2015 |  |  | December 31, 2014 |
Costs incurred and estimated earnings on uncompleted contracts |  | $ | 275,316 |  |  | $ | 629,416 |
Less billings to date |  | (258,208 | ) |  | (585,794 | )
|  | $ | 17,108 |  |  | $ | 43,622 |
Costs incurred and estimated earnings net of billings on uncompleted contracts is presented in the Consolidated Balance Sheets under the following captions:
|  | December 31, 2015 |  |  | December 31, 2014 |
Unbilled revenue |  | $ | 17,565 |  |  | $ | 43,622 |
Billings in excess of costs incurred and estimated earnings on uncompleted contracts |  | (457 | ) |  | — |
|  | $ | 17,108 |  |  | $ | 43,622 |

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