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Equity - Stock Options - Activity (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share-based compensation |  |  |
Outstanding shares, ending balance | 880,277 | 993,860 |
Granted (in shares) | 1,328,718 | 224,000 |
Forfeited/Expired/Exchanged - (in shares) | (77,937) | (337,583) |
Outstanding shares, beginning balance | 2,131,058 | 880,277 | 993,860
Exercisable at December 31, Options (in shares) | 1,461,073 | 587,962 |
Outstanding - Weighted Average Exercise Price (in dollars per share) | $ 4.32 | $ 4.81 |
Granted - Weighted Average Exercise Price (in dollars per share) | 1.32 | 1.94 |
Forfeited/Expired/Exchanged - Weighted Average Exercise Price (in dollars per share) | 2.11 | 4.19 |
Outstanding - Weighted Average Exercise Price (in dollars per share) | 2.53 | 4.32 | $ 4.81
Exercisable - Weighted Average Exercise Price (in dollars per share) | 2.90 | $ 5.17 |
Vest over the estinmated fair value | $ 2.25 |  |
Granted - Weighted Average Remaining Contractual Life (in years) | 9 years 1 month 28 days | 9 years 2 months 23 days |
Stock options, Contractual life (in years) | 7 years 11 months 27 days | 6 years 5 months 27 days | 6 years 11 months 9 days
Stock options, Contractual life (in years) |  | 9 years 15 days |
Exercisable - Weighted Average Remaining Contractual Life (in years) | 7 years 6 months 29 days | 6 years 5 months 27 days |
Minimum [Member] |  |  |
Share-based compensation |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 1 year |  |
Maximum [Member] |  |  |
Share-based compensation |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |

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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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