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v3.19.1

Liquidity (Tables) | 12 Months Ended
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Dec. 31, 2018
Liquidity [Member] |
Liquidity [Line Items] |
Schedule of expects to satisfy remaining unsatisfied performance obligation |
|  |  | 2018 |
| Within 1 year |  | $ | 22,563,674 |
| 1 to 2 years |  |  | 54,639,417 |
| Thereafter |  |  | 20,454,288 |
| Total Backlog |  | $ | 97,657,379 |

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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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