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DEBT (Tables)
 12 Months Ended
Sep. 30, 2025
Debt Disclosure [Abstract]  
Schedule of Carrying Values of Company's 2026 Notes
The carrying values of the 0.75% convertible notes due 2026 issued by the Company in an initial aggregate principal amount of $155.3 million (the “2026 Notes”) are as follows (amounts in thousands):
September 30, 2025September 30, 2024
2026 Notes:
Principal amount$155,250 $155,250 
Less: unamortized discount and issuance costs, net of amortization(3,034)(11,649)
Carrying amount$152,216 $143,601 
Schedule of Interest Costs Recognized Related to 2026 Notes
The following table presents the total amount of interest cost recognized relating to the 2026 Notes (amounts in thousands):
Twelve Months Ended September 30,
202520242023
Contractual interest expense$1,164 $1,174 $1,615 
Amortization of debt discount and issuance costs8,615 8,085 7,546 
Total interest expense recognized$9,779 $9,259 $9,161 
Schedule of Maturities of Principal Amounts of Our Other Borrowings
Maturities of principal amounts of our other borrowings as of September 30, 2025 were as follows (amounts in thousands):
Principal Amounts
2026$280 
2027404 
2028423 
2029416 
2030341 
Thereafter2,471 
Total$4,335