Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets

The following table presents the components of intangible assets:

	Gross Carrying Amount		Accumulated Amortization		Impairment		Net Carrying Amount		Useful Lives
	(in thousands)								(in years)
As of September 30, 2023
Patents	$	21,728	$	13,321	$	—	$	8,407	14
License	3,129		1,274		—		1,855		21
Total intangible assets, net	$	24,857	$	14,595	$	—	$	10,262
As of September 30, 2022
Patents	$	21,728	$	11,770	$	—	$	9,958	14
License	3,129		1,125		—		2,004		21
Total intangible assets, net	$	24,857	$	12,895	$	—	$	11,962

Schedule of Intangible Assets Future Amortization Expense

The following table presents the estimated future amortization expense related to intangible assets as of September 30, 2023:

	Amortization Expense
Year Ending September 30,	(in thousands)
2024	$	1,700
2025	1,700
2026	1,700
2027	1,700
2028	1,700
Thereafter	1,762
Total	$	10,262