Income Taxes - Provision (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income tax expense (benefit)	$ (4,640)	$ (4,680)
Deferred tax benefit resulting from the extension of a tax incentive in China		1,300
Benefit related to stock compensation windfalls		$ 4,800