Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE DISCLOSURES - Narrative (Details)

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FAIR VALUE DISCLOSURES - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 11, 2020
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Fair Value Disclosures [Abstract]          
Change in fair value of preferred stock derivative liability   $ 0 $ 0 $ 0 $ 15,416
Call right, conversion of preferred stock ratio (in shares) 5.17962