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ORGANIZATION - Components of Current Liquidity (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Cash and cash equivalents | $ 63,892 | $ 33,417 |
Debt securities available for sale | 98,592 | 167,365 |
Unrestricted liquidity | 162,484 | 200,782 |
Less: Other Ironton set-aside | 54,560 | 50,713 |
Available unrestricted liquidity | 107,924 | 150,069 |
Restricted Cash (current and non-current) | 163,631 | 230,441 |
Working capital | 197,916 | 306,890 |
Accumulated deficit | (242,525) | (157,779) |
Net loss | $ (84,746) | $ (77,502) | $ (52,992)

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