Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		12 Months Ended
	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2024 USD ($) Customer Unit Segment	Sep. 30, 2023 USD ($) Customer	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Jun. 02, 2020
Summary Of Significant Accounting Policies [Line Items]
Inventory			$ 1,000,000	$ 500,000
Goodwill impairment charge	$ 357,100,000	$ 252,100,000	$ 609,172,000	0	$ 213,720,000
Number of operating segment | Segment			1
Estimate fair value	$ 154,200,000	$ 463,400,000
Number of reporting unit | Unit			1
Impairment of long-lived asset group, disposition			$ 0	0	0
Undistributed earnings in our foreign subsidiaries are expected			0	0
Foreign currency transaction gain (loss)			$ (1,800,000)	2,300,000	$ 100,000
Operating lease, existence of option to extend			true
Operating lease, option to extend			Some of our leases include options to extend or terminate the lease prior to the end of the agreed upon lease term. For purposes of calculating lease liabilities, lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise such options.
Operating lease, existence of option to terminate			true
Operating lease, option to terminate			Some of our leases include options to extend or terminate the lease prior to the end of the agreed upon lease term. For purposes of calculating lease liabilities, lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise such options.
Deferred tax assets valuation allowance			$ 167,314,000	$ 162,966,000
Foreign Jurisdiction
Summary Of Significant Accounting Policies [Line Items]
Deferred tax assets valuation allowance						$ 107,600,000
3.00% Convertible Senior Notes Due 2025
Summary Of Significant Accounting Policies [Line Items]
Debt instrument, interest rate			3.00%	3.00%			3.00%
Minimum
Summary Of Significant Accounting Policies [Line Items]
Operating lease remaining term			1 year
Maximum
Summary Of Significant Accounting Policies [Line Items]
Operating lease remaining term			6 years
Concentration of Credit Risk | Accounts Receivable, Net
Summary Of Significant Accounting Policies [Line Items]
Number of major customers | Customer			1	2
Concentration of Credit Risk | Customer One | Accounts Receivable, Net
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			21.40%	10.80%
Concentration of Credit Risk | Customer Two | Accounts Receivable, Net
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage				10.10%