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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Basis of Presentation and Accounting Policies [Abstract] |
Schedule Of Property Plant And Equipment Estimated Useful Lives [Table Text Block] | The estimated useful lives of the assets are as follows:
|  | Estimated
|  | Useful Life
Computer hardware and software |  | 3-5 years
Furniture and fixtures |  | 5 years
Mobile equipment |  | 3 years

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- Definition Tabular disclosure of the useful lives of property, plant and equipment. + References No definition available. + Details
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