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Construction Backlog (Tables) | 9 Months Ended
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Sep. 30, 2018
Construction Backlog [Abstract] |
Schedule of backlog of signed construction and engineering contracts |
|  | September 30, 2018 |  |  | December 31, 2017 |
Balance – beginning of period |  | $ | 76,659,029 |  |  | $ | 541,291 |
New contracts and change orders during the period |  |  | 32,112,767 |  |  |  | 81,179,323 |
Subtotal |  |  | 108,771,796 |  |  |  | 81,720,614 |
Less: contract revenue earned during the period |  |  | (5,932,150 | ) |  |  | (5,061,585 | )
Balance – end of period |  | $ | 102,839,646 |  |  | $ | 76,659,029 |

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