Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 50,160	$ 8,612	$ (68,463)
Other comprehensive income ( loss):
Foreign currency translation adjustment, net of tax	2,746	9,653	(15,678)
Comprehensive income (loss)	$ 52,906	$ 18,265	$ (84,141)