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Other Assets and Liabilities - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Other Liabilities Disclosure [Abstract] |  |
Income tax receivable (see Note 13) | $ 29,097 | $ 18,615
Prepaid and other expenses | 3,179 | 1,018
Guarantee from Armistice | 279 | 318
Other | 271 | 798
Receivable from Exela (see Note 4) | 0 | 16,500
Short-term deposit | 0 | 1,477
Total | $ 32,826 | $ 38,726

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