Financial Instruments - Financial Assets and Liability Measured at Fair Value on Recurring Basis (Details) |
Dec. 31, 2014
USD ($)
|
|---|---|
| Warrant liability | $ 7,386,000 |
| Level 1 [Member] | |
| Warrant liability | |
| Level 2 [Member] | |
| Warrant liability | |
| Level 3 [Member] | |
| Warrant liability | $ 7,386,000 |