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Intangible Assets (Tables)
 12 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets The following table presents the components of intangible assets:
Gross Carrying AmountAccumulated AmortizationImpairmentNet Carrying AmountUseful Lives
(in thousands)
(in years)
As of September 30, 2024
Patents$21,728 $14,873 $— $6,855 14
License3,129 1,422 — 1,707 21
Total intangible assets, net$24,857 $16,295 $— $8,562 
As of September 30, 2023
Patents$21,728 $13,321 $— $8,407 14
License3,129 1,274 — 1,855 21
Total intangible assets, net$24,857 $14,595 $— $10,262 
Schedule of Intangible Assets Future Amortization Expense
The following table presents the estimated future amortization expense related to intangible assets as of September 30, 2024:
Amortization Expense
Year Ending September 30, (in thousands)
2025$1,700 
20261,700 
20271,700 
20281,700 
2029795 
Thereafter967 
Total$8,562