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Asset Sale (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract] |  |  |  |  |  |
Gain on sale of non-financial assets | $ 132,800 | $ 132,818 | $ 0 | $ 132,818 | $ 0 |
Proceeds from Sale of Productive Assets | $ 160,385 |  |  |  | 0 |
TerSera Maximum Development, Regulatory and Commercial Milestones |  |  |  | 65,000 |  |
Xermelo Pretax Net Loss |  | (2,100) | (4,100) | (12,100) | (10,800) |
Severance Costs |  |  |  | 5,500 |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  | $ (255) | $ 0 | (255) | $ 0 |
Severance Costs |  |  |  | 5,500 |  |
R&D severance costs [Member] |  |  |  |  |  |
Asset Retirement Obligation Disclosure [Abstract] |  |  |  |  |  |
Severance Costs |  |  |  | 2,500 |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Severance Costs |  |  |  | 2,500 |  |
SG&A severance costs [Member] |  |  |  |  |  |
Asset Retirement Obligation Disclosure [Abstract] |  |  |  |  |  |
Severance Costs |  |  |  | 3,000 |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Severance Costs |  |  |  | 3,000 |  |
Forecast [Member] |  |  |  |  |  |
Asset Retirement Obligation Disclosure [Abstract] |  |  |  |  |  |
Severance Costs |  |  |  |  |  | $ 5,700
Debt Instrument [Line Items] |  |  |  |  |  |
Severance Costs |  |  |  |  |  | $ 5,700
BioPharma [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  | $ 8,600 |  |

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