Summary of Significant Accounting Policies - Summary of Estimated Useful Life of Property and Equipment (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2015 | |
| Office Furniture, Fixtures and Equipment [Member] | Minimum [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life of assets | 5 years |
| Office Furniture, Fixtures and Equipment [Member] | Maximum [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life of assets | 10 years |
| Computer Equipment and Software [Member] | Minimum [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life of assets | 3 years |
| Computer Equipment and Software [Member] | Maximum [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life of assets | 8 years |