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Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2014
|
|---|---|
| Assets | |
| Total assets | $ 40,865 |
|
Stock warrants [Member]
|
|
| Liabilities | |
| Liabilities | 320 |
|
Cash [Member]
|
|
| Assets | |
| Total assets | 18,244 |
|
Money market securities [Member]
|
|
| Assets | |
| Total assets | 22,370 |
|
Restricted cash [Member]
|
|
| Assets | |
| Total assets | 251 |
|
Level 1 [Member]
|
|
| Assets | |
| Total assets | 40,865 |
|
Level 1 [Member] | Cash [Member]
|
|
| Assets | |
| Total assets | 18,244 |
|
Level 1 [Member] | Money market securities [Member]
|
|
| Assets | |
| Total assets | 22,370 |
|
Level 1 [Member] | Restricted cash [Member]
|
|
| Assets | |
| Total assets | 251 |
|
Level 3 [Member] | Stock warrants [Member]
|
|
| Liabilities | |
| Liabilities | $ 320 |