Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (2,812)	$ (274)
Other comprehensive (loss) income:
Net changes related to available-for-sale securities, net of tax	(5)
Foreign currency translation adjustments	(1,647)	1,832
Other comprehensive (loss) income	(1,652)	1,832
Comprehensive (loss) income	$ (4,464)	$ 1,558