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Summary of Significant Accounting Policies - Property and Equipment (Detail) | 12 Months Ended
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Dec. 31, 2016
Furniture and Fixtures |
Property, Plant and Equipment [Line Items] |
Property and Equipment Estimated useful lives | P7Y
Laboratory Equipment |
Property, Plant and Equipment [Line Items] |
Property and Equipment Estimated useful lives | P5Y
Office Equipment |
Property, Plant and Equipment [Line Items] |
Property and Equipment Estimated useful lives | P5Y
Computer Equipment |
Property, Plant and Equipment [Line Items] |
Property and Equipment Estimated useful lives | P5Y
Computer Software |
Property, Plant and Equipment [Line Items] |
Property and Equipment Estimated useful lives | P3Y
Minimum |
Property, Plant and Equipment [Line Items] |
Property and Equipment Estimated useful lives | P3Y
Maximum |
Property, Plant and Equipment [Line Items] |
Property and Equipment Estimated useful lives | P7Y

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- Definition Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=68058157&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 35 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68071081&loc=d3e1205-110223 + Details
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