Income Taxes - Additional Information (Details) - USD ($) |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|---|
| Income Tax Disclosure [Abstract] | |||
| Net operating loss carry-forwards | $ 66,100,000 | $ 66,100,000 | $ 66,100,000 |
| Interest and penalties accrued | $ 0 | $ 0 | $ 0 |