Commitments and Contingencies (Tables) |
12 Months Ended | ||||||||||||||||||||||||||
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Dec. 31, 2017 | |||||||||||||||||||||||||||
| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||
| Other Commitments [Table Text Block] |
Original maturities of deferred revenue are as follows as of:
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- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of information about obligations resulting from other commitments. No definition available.
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