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Other Assets and Liabilities - Other Non-Current Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Other Non-Current Liabilities: |  |
Tax liabilities and other | $ 3,155 | $ 3,159
Guarantee to Deerfield | 844 | 1,053
Total | $ 3,999 | $ 4,212

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