|
Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2014
|
|---|---|
| Assets | |
| Total assets | $ 54,258 |
|
Stock warrants [Member]
|
|
| Liabilities | |
| Liabilities | 3,975 |
|
Cash [Member]
|
|
| Assets | |
| Total assets | 17,934 |
|
Money market securities [Member]
|
|
| Assets | |
| Total assets | 31,016 |
|
Restricted cash [Member]
|
|
| Assets | |
| Total assets | 251 |
|
Corporate bonds and commercial paper [Member]
|
|
| Assets | |
| Total assets | 5,057 |
|
Level 1 [Member]
|
|
| Assets | |
| Total assets | 49,201 |
|
Level 1 [Member] | Cash [Member]
|
|
| Assets | |
| Total assets | 17,934 |
|
Level 1 [Member] | Money market securities [Member]
|
|
| Assets | |
| Total assets | 31,016 |
|
Level 1 [Member] | Restricted cash [Member]
|
|
| Assets | |
| Total assets | 251 |
|
Level 2 [Member]
|
|
| Assets | |
| Total assets | 5,057 |
|
Level 2 [Member] | Corporate bonds and commercial paper [Member]
|
|
| Assets | |
| Total assets | 5,057 |
|
Level 3 [Member] | Stock warrants [Member]
|
|
| Liabilities | |
| Liabilities | $ 3,975 |