Significant Accounting Policies - Net Loss per Share (Details) - shares |
6 Months Ended | |
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Jun. 30, 2019 |
Jun. 30, 2018 |
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| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 7,855,725 | 7,408,177 |
| Warrants (Note 6) | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 4,233,593 | 4,311,446 |
| Stock option (Note 6) | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 110,000 | 60,000 |
| Restricted Stock [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 3,512,132 | 3,036,731 |
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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