Income Taxes - Additional Information (Detail) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Income Tax [Line Items] | |||
| Federal statutory income tax rate | 34.00% | 34.00% | 34.00% |
| Income tax expense | $ 0 | $ 0 | $ 0 |
| Minimum percentage of likelihood of realization of deferred tax assets | 50.00% | ||
| Domestic Country [Member] | |||
| Income Tax [Line Items] | |||
| Operating Loss carry forward | $ 168,000,000 | ||
| Net operating loss used to offset taxable income | 1,500,000 | ||
| State and Local Jurisdiction [Member] | |||
| Income Tax [Line Items] | |||
| Operating Loss carry forward | $ 178,000,000 | ||