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Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Mar. 31, 2023
Sep. 30, 2022
Jun. 02, 2020
Senior Credit Facilities      
Debt Instrument [Line Items]      
Debt Instrument, unamortized discount $ 1,390 $ 1,310  
Debt instrument, deferred issuance costs $ 127 $ 158  
Debt instrument, effective interest rate 8.41% 5.37%  
3.00% Convertible Senior Notes Due 2025      
Debt Instrument [Line Items]      
Debt instrument, interest rate 3.00% 3.00% 3.00%
Debt instrument, maturity year 2025 2025  
Debt Instrument, unamortized discount $ 0 $ 11,264  
Debt instrument, deferred issuance costs $ 2,546 $ 2,832  
Debt instrument, effective interest rate 3.70% 6.29%