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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Estimated Useful Life Of Asset [Table Text Block] | The estimated useful life by asset description is noted in the following table.
Asset Description |  | Estimated Useful Life
Office equipment and furniture |  | 3 – 5 years
Leasehold improvements and fixtures |  | Lesser of estimated useful life or lease term

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