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v3.19.1

Construction Backlog (Details Textual) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 USD ($) Number | Sep. 30, 2017 USD ($) | Dec. 31, 2018 USD ($) Number
Construction Backlog (Textual) |  |  |
Total Remaining Unsatisfied Performance Obligations |  |  | $ 97,657,379
Construction backlog contract amount | $ 25,000,000 | $ 15 | $ 55
Number of large contracts | Number | 1 |  | 2
Moved Contract [Member] |  |  |
Construction Backlog (Textual) |  |  |
Construction backlog contract amount |  |  | $ 27,500,000

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- Definition Its represented number of large contracts. + References No definition available. + Details
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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130556-203045 + Details
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