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Contract Assets and Contract Liabilities (Tables) | 9 Months Ended
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Sep. 30, 2019
Contract Assets and Contract Liabilities [Abstract] |
Schedule of costs and estimated earnings on uncompleted contracts |
|  |  | September 30, 2019 |  |  | December 31, 2018 |
| Costs incurred on uncompleted contracts |  | $ | 228,461 |  |  | $ | 11,307,975 |
| Estimated earnings to date on uncompleted contracts |  |  | 79,852 |  |  |  | 838,615 |
| Gross contract assets |  |  | 308,313 |  |  |  | 12,146,590 |
| Less: billings to date |  |  | (540,715 | ) |  |  | (13,221,152 | )
| Net contract assets (liabilities) |  | $ | (232,402 | ) |  | $ | (1,074,562 | )
Schedule of costs included in condensed consolidated balance sheets |
|  |  | September 30, 2019 |  |  | December 31, 2018 |
| Costs and estimated earnings in excess of billings on uncompleted contracts |  | $ | 8,689 |  |  | $ | 260,325 |
| Billings in excess of costs and estimated earnings on uncompleted contracts |  |  | (241,091 | ) |  |  | (1,334,887 | )
| Net contract assets (liabilities) |  | $ | (232,402 | ) |  | $ | (1,074,562 | )

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