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FAIR VALUE MEASUREMENTS - Fair Value on a Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure | $ 361,778 | $ 111,855
Assets | Equity securities at fair value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure | 361,778 | 109,103
Assets | Investment at fair value - warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure |  | 2,752
Assets | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure | 113,630 | 109,103
Assets | Level 1 | Equity securities at fair value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure | 113,630 | 109,103
Assets | Level 1 | Investment at fair value - warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure |  | 0
Assets | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure | 248,148 | 2,752
Assets | Level 1 | Equity securities at fair value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure | 248,148 | 0
Assets | Level 1 | Investment at fair value - warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure |  | 2,752
Assets | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure | 0 | 0
Assets | Level 3 | Equity securities at fair value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure | 0 | 0
Assets | Level 3 | Investment at fair value - warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assets, fair value disclosure |  | 0
Liabilities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 126,117 | 85,709
Liabilities | Series A warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 11,291 | 6,640
Liabilities | Series A embedded derivative liabilities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 18,448 | 26,728
Liabilities | Series B warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 96,378 | 52,341
Liabilities | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 0 | 0
Liabilities | Level 1 | Series A warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 0 | 0
Liabilities | Level 1 | Series A embedded derivative liabilities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 0 | 0
Liabilities | Level 1 | Series B warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 0 | 0
Liabilities | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 0 | 6,640
Liabilities | Level 1 | Series A warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 0 | 6,640
Liabilities | Level 1 | Series A embedded derivative liabilities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 0 | 0
Liabilities | Level 1 | Series B warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 0 | 0
Liabilities | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 126,117 | 79,069
Liabilities | Level 3 | Series A warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 11,291 | 0
Liabilities | Level 3 | Series A embedded derivative liabilities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | 18,448 | 26,728
Liabilities | Level 3 | Series B warrants |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial and nonfinancial liabilities, fair value disclosure | $ 96,378 | $ 52,341

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