Summary of Significant Accounting Policies (Tables) |
12 Months Ended | ||||||||||||||||||
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Dec. 31, 2017 | |||||||||||||||||||
| Accounting Policies [Abstract] | |||||||||||||||||||
| Useful Lives for Principal Classes of Assets |
The ranges of useful lives for the principal classes of assets are as follows:
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| X | ||||||||||
- Definition Schedule of Property and Equipment Useful Lives [Table Text Block] No definition available.
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| X | ||||||||||
- References No definition available.
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