Property, plant and equipment -Depreciation (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Property, Plant and Equipment [Abstract] | ||
| Depreciation and amortization | $ 1,537,622 | $ 1,114,540 |
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- Definition Depreciation, Depletion and Amortization, Property, Plant and Equipment No definition available.
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- References No definition available.
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