Warrants, Other Liability and Net Sales Distribution Payment Liability - Schedule of Reconciliation of Liabilities Measured at Fair Value (Detail) - Significant Unobservable Inputs (Level 3) [Member] $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2014
USD ($)
| |
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |
| Beginning balance | $ 26,912 |
| Change in fair value of Net Sales Distribution Payment Liability | (10,007) |
| Extinguishment of liabilities | (16,905) |
| Ending balance | $ 0 |