Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 719	$ (1,932)
Foreign currency translation adjustment	595	1,081
Reclassification adjustment for net foreign currency translation losses included in net loss		1,592
Comprehensive income	$ 1,314	$ 741