Significant Accounting Policies - Potential Dilutive Securities Excluded from the Computation of Dilutive Weighted Average Shares Outstanding (Details) - shares |
6 Months Ended | |
|---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Potential dilutive securities excluded from the computation of dilutive weighted average shares outstanding | 7,326,871 | 12,613,018 |
| Warrant [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Potential dilutive securities excluded from the computation of dilutive weighted average shares outstanding | 1,964,250 | 8,896,848 |
| Stock Options [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Potential dilutive securities excluded from the computation of dilutive weighted average shares outstanding | 5,362,621 | 3,716,170 |