|
Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) (USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Payables And Accruals [Abstract] | ||
| Accounts payable and other accrued expenses | $ 415 | $ 380 |
| Accrued legal, professional fees and other | 257 | 522 |
| Accrued vacation | 63 | 21 |
| Accounts payable and accrued expenses, total | $ 735 | $ 923 |