Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Financial assets:
Cash equivalents	$ 72,754	$ 102,313
Convertible note	$ 2,000	$ 2,000
Derivative Asset Statement of Financial Position Extensible Enumeration	Other assets	Other assets
Financial assets, fair value	$ 82,094	$ 113,371
Financial liabilities:
Financial liabilities, fair value	$ 3,158	$ 2,908
Derivative Liability Statement Of Financial Position Extensible Enumeration	Other liabilities	Other liabilities
Forward Contracts
Financial assets:
Foreign currency contract, asset	$ 7,340	$ 9,058
Financial liabilities:
Foreign currency contracts, liability	3,158	2,908
Level 1
Financial assets:
Cash equivalents	72,754	102,313
Convertible note	0	0
Financial assets, fair value	72,754	102,313
Financial liabilities:
Financial liabilities, fair value	0	0
Level 1 | Forward Contracts
Financial assets:
Foreign currency contract, asset	0	0
Financial liabilities:
Foreign currency contracts, liability	0	0
Level 2
Financial assets:
Cash equivalents	0	0
Convertible note	0	0
Financial assets, fair value	7,340	9,058
Financial liabilities:
Financial liabilities, fair value	3,158	2,908
Level 2 | Forward Contracts
Financial assets:
Foreign currency contract, asset	7,340	9,058
Financial liabilities:
Foreign currency contracts, liability	3,158	2,908
Level 3
Financial assets:
Cash equivalents	0	0
Convertible note	2,000	2,000
Financial assets, fair value	2,000	2,000
Financial liabilities:
Financial liabilities, fair value	0	0
Level 3 | Forward Contracts
Financial assets:
Foreign currency contract, asset	0	0
Financial liabilities:
Foreign currency contracts, liability	$ 0	$ 0