Note Payable - Future Maturities of MidCap Obligation (Detail) - Mid Cap [Member] $ in Thousands |
Dec. 31, 2015
USD ($)
|
|---|---|
| Debt Instrument [Line Items] | |
| 2016 | $ 7,000 |
| 2017 | 12,000 |
| 2018 | 11,000 |
| Total maturities | 30,000 |
| Unamortized discount and loan costs | (1,125) |
| Total Midcap obligation | $ 28,875 |