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SUPPLEMENTAL FINANCIAL INFORMATION - Schedule of Other Nonoperating Income (Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Interest income | $ 12 | $ 11
Change in value of investments accounted for at fair value | (3,418) | 1,456
Change in value of warrant liabilities | 0 | (3,504)
Foreign exchange loss | (1,213) | (339)
Other | 111 | 329
Other loss | $ (4,508) | $ (2,047)

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