Summary of Significant Accounting Policies - Estimated Useful Life of Property and Equipment (Details) |
12 Months Ended |
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Dec. 31, 2017 | |
| Laboratory equipment | Minimum | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 10 years |
| Laboratory equipment | Maximum | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 14 years |
| Office and computer equipment | Minimum | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 3 years |
| Office and computer equipment | Maximum | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 13 years |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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