Other Current Assets - Schedule of Other Current Assets (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] | ||
| Inventory | $ 133 | $ 280 |
| Prepaid expenses | 1,985 | 893 |
| Other assets, current | $ 2,118 | $ 1,173 |