Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($)	Dec. 31, 2022	Sep. 30, 2022
Financial assets:
Cash equivalents	$ 157,234,000	$ 102,313,000
Convertible note	2,000,000	2,000,000
Options	2,688,000
Forward contracts	$ 824,000	$ 9,058,000
Derivative Asset Statement of Financial Position Extensible Enumeration	Other assets	Other assets
Financial assets, fair value	$ 162,746,000	$ 113,371,000
Financial liabilities:
Forward contracts	$ 3,841,000	$ 2,908,000
Derivative Liability Statement Of Financial Position Extensible Enumeration	Other liabilities	Other liabilities
Financial liabilities, fair value	$ 3,841,000	$ 2,908,000
Level 1
Financial assets:
Cash equivalents	157,234,000	102,313,000
Convertible note	0	0
Options	0
Forward contracts	0	0
Financial assets, fair value	0	102,313,000
Financial liabilities:
Forward contracts	0	0
Financial liabilities, fair value	157,234,000	0
Level 2
Financial assets:
Cash equivalents		0
Convertible note		0
Options	2,688,000
Forward contracts	824,000	9,058,000
Financial assets, fair value	3,512,000	9,058,000
Financial liabilities:
Forward contracts	3,841,000	2,908,000
Financial liabilities, fair value	3,841,000	2,908,000
Level 3
Financial assets:
Cash equivalents	0	0
Convertible note	2,000,000	2,000,000
Options	0
Forward contracts	0	0
Financial assets, fair value	0	2,000,000
Financial liabilities:
Forward contracts	0	0
Financial liabilities, fair value	$ 2,000,000	$ 0