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NOTES PAYABLE AND DEBT INSTRUMENTS - Summary of Interest Expense of PCT's Convertible Debt (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Debt Instrument [Line Items]        
Amortization of deferred financing costs     $ 1,840 $ 746
Green Convertible Notes        
Debt Instrument [Line Items]        
Contractual interest expense $ 1,863 $ 0 1,863 0
Amortization of deferred financing costs $ 643 $ 0 $ 643 $ 0
Effective interest rate 11.20% 0.00% 11.20% 0.00%