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Purchase of interest in Aerex Industries, Inc. (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Feb. 11, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash consideration |  |  |  |
Total cash consideration |  | $ 0 | $ 7,742,853 | $ 0
Aerex Industries Inc [Member] |  |  |  |
Cash consideration |  |  |  |
Purchase price (excluding working capital) | $ 7,140,000 |  |  |
Working capital adjustment | 605,179 |  |  |
Cash acquired | (2,326) |  |  |
Total cash consideration | $ 7,742,853 |  |  |

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- Definition Amount of tangible or intangible assets, including a business or subsidiary of the acquirer transferred by the entity to the former owners of the acquiree. Excludes cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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