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Inventory (Tables) | 12 Months Ended
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Dec. 31, 2018
Inventory Disclosure [Abstract] |
Schedule of Inventory, Noncurrent [Table Text Block] |
|  | December 31, |
|  | 2018 |  |  | 2017 |
Water stock |  | $ | 36,837 |  |  | $ | 28,332 |
Consumables stock |  |  | 106,925 |  |  |  | 103,442 |
Spare parts stock |  |  | 6,634,157 |  |  |  | 5,914,740 |
Total inventory |  |  | 6,777,919 |  |  |  | 6,046,514 |
Less current portion |  |  | 2,232,721 |  |  |  | 1,583,553 |
Inventory (non-current) |  | $ | 4,545,198 |  |  | $ | 4,462,961 |

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