Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS - Movement in Level 3 liabilities (Details)

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FAIR VALUE MEASUREMENTS - Movement in Level 3 liabilities (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Balance at beginning of year $ 0
Warrant liability assumed 149,745
Change in fair value of warrant liability (56,417)
Balance at end of year $ 93,328