Significant Accounting Policies - Potential Dilutive Securities Excluded from Computation of Dilutive Weighted Average Shares Outstanding (Details) - shares |
6 Months Ended | |
|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Potential dilutive securities excluded from computation of dilutive weighted average shares outstanding | 8,989,362 | 7,326,871 |
| Warrants [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Potential dilutive securities excluded from computation of dilutive weighted average shares outstanding | 1,288,500 | 1,964,250 |
| Stock Options [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Potential dilutive securities excluded from computation of dilutive weighted average shares outstanding | 7,700,862 | 5,362,621 |