Summary of Significant Accounting Policies Basis of Presentation - Estimated Useful Life of Property and Equipment (Detail) |
9 Months Ended |
|---|---|
Sep. 30, 2015 | |
| Computer Equipment [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life of property and equipment | 3 years |
| Lab Equipment [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life of property and equipment | 3 years |
| Furniture and Fixtures [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life of property and equipment | 5 years |
| Machinery and Equipment [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life of property and equipment | 3 years |
| Manufacturing Equipment [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life of property and equipment | 7 years |