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Other Assets and Liabilities - Other Current Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Goodwill and Intangible Assets Disclosure [Abstract] |  |
Accrued interest | $ 2,695 | $ 2,695
Due to Exela | 2,026 | 0
Guarantee to Deerfield | 319 | 455
Other | 160 | 725
Other current liabilities | $ 5,200 | $ 3,875

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