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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2018
Accounting Policies [Abstract] |
Schedule Of Estimated Useful Lives Of Property Plant And Equipment | The useful lives of the property and equipment are as follows:
Laboratory equipment |  | 5 years
Furniture and office equipment |  | 5 years
Computer equipment |  | 3 years
Software |  | 3 years
Leasehold improvements |  | Shorter of remaining lease term or estimated useful life

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