Debt - Fair Value Hierarchy Table on Recurring Basis (Level 2) (Detail) - USD ($) $ in Thousands |
Jun. 30, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] | ||
| Other long-term liabilities | $ 14,363 | $ 16,868 |
| Carrying Value | Warrant | Fair Value Measurements Recurring | ||
| Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] | ||
| Other long-term liabilities | 3,375 | |
| Fair Value Measurement | Warrant | Level 2 | Fair Value Measurements Recurring | ||
| Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] | ||
| Other long-term liabilities | $ 3,375 |