Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (2,570)	$ (5,487)	$ 7,059	$ (45,123)
Other comprehensive income (loss):
Foreign currency translation adjustment, net of tax	3,459	5,416	12,976	(18,359)
Comprehensive income (loss)	$ 889	$ (71)	$ 20,035	$ (63,482)