Quarterly report pursuant to Section 13 or 15(d)

NOTES PAYABLE AND DEBT INSTRUMENTS - Summary of the Convertible Notes (Details)

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NOTES PAYABLE AND DEBT INSTRUMENTS - Summary of the Convertible Notes (Details) - Convertible Debt - Level 3 - USD ($)
$ in Thousands
Sep. 30, 2021
Sep. 30, 2020
Debt Instrument [Line Items]    
Unamortized deferred issuance costs $ 2,010 $ 3,288
Net carrying amount 59,670 56,712
Fair value $ 123,332 $ 123,532