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NOTES PAYABLE AND DEBT INSTRUMENTS - Summary of Convertible Notes (Details) - Green Convertible Notes - USD ($)
$ in Thousands
Sep. 30, 2023
Sep. 30, 2022
Debt Instrument [Line Items]    
Unamortized deferred issuance costs $ 30,855 $ 0
Net carrying amount 219,145 0
Fair value $ 177,750 $ 0