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Other Assets and Liabilities - Other Current Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Other Liabilities, Current [Abstract] |  |
Accrued interest | $ 2,695 | $ 2,695
Due to Exela | 0 | 2,026
Guarantee to Deerfield | 275 | 319
Other | 176 | 160
Other current liabilities | $ 3,146 | $ 5,200

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