Significant Accounting Policies - Property and Equipment (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2016 | |
| Computer and software | Minimum | |
| Property, Plant and Equipment [Line Items] | |
| Property, and equipment useful life | 3 years |
| Computer and software | Maximum | |
| Property, Plant and Equipment [Line Items] | |
| Property, and equipment useful life | 5 years |
| Furniture and equipment | Minimum | |
| Property, Plant and Equipment [Line Items] | |
| Property, and equipment useful life | 5 years |
| Furniture and equipment | Maximum | |
| Property, Plant and Equipment [Line Items] | |
| Property, and equipment useful life | 7 years |