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Derivative Liabilities - Schedule of Sensitivity Analysis (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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Altria Warrant |  |
Sensitivity Analysis, Impact of 10 Percent Decrease (Increase) on Net Income (Loss) [Abstract] |  |
Share price | $ 26,300 | $ 36,436
Weighted average expected life | 14,249 | 17,471
Expected annualized volatility | 27,711 | 33,343
Pre-emptive Rights |  |
Sensitivity Analysis, Impact of 10 Percent Decrease (Increase) on Net Income (Loss) [Abstract] |  |
Share price | 2,779 | 2,743
Weighted average expected life | 1,744 | 2,366
Expected annualized volatility | 2,652 | 2,180
Top-up Rights |  |
Sensitivity Analysis, Impact of 10 Percent Decrease (Increase) on Net Income (Loss) [Abstract] |  |
Share price | 4,939 | 9,577
Weighted average expected life | 1,272 | 2,178
Expected annualized volatility | $ 4,769 | $ 7,714

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