Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 2,047	$ 4,971	$ (5,960)	$ 14,258
Foreign currency translation adjustment	(904)	(2,181)	(1,690)	(844)
Reclassification adjustment for net losses included in net income	487	0	487	0
Comprehensive income (loss)	$ 1,630	$ 2,790	$ (7,163)	$ 13,414