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Liquidity (Tables) | 6 Months Ended
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Jun. 30, 2019
Liquidity [Member] |
Liquidity [Line Items] |
Schedule of expects to satisfy remaining unsatisfied performance obligation |
|  |  | 2019 |
| Within 1 year |  | $ | 14,324,626 |
| 1 to 2 years |  |  | 34,500,000 |
| Thereafter |  |  | 21,944,107 |
| Total Backlog |  | $ | 70,768,733 |

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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130556-203045 + Details
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