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Derivative Liabilities - Schedule of Sensitivity Analysis (Details) - USD ($) $ in Thousands | Dec. 31, 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 at issuance date | $ 25,819 | $ 36,436
Weighted average expected life | 13,541 | 17,471
Expected annualized volatility | 26,183 | 33,343
Pre-emptive Rights |  |
Sensitivity Analysis, Impact of 10 Percent Decrease (Increase) on Net Income (Loss) [Abstract] |  |
Share price at issuance date | 2,527 | 2,743
Weighted average expected life | 1,988 | 2,366
Expected annualized volatility | 2,269 | 2,180
Top-up Rights |  |
Sensitivity Analysis, Impact of 10 Percent Decrease (Increase) on Net Income (Loss) [Abstract] |  |
Share price at issuance date | 2,989 | 9,577
Weighted average expected life | 2,121 | 2,178
Expected annualized volatility | $ 2,602 | $ 7,714

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