Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018		Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 2,621	$ 1,335	$ (2,305)		$ 5,023
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment	(3,116)	2,535	(1,058)		57
Change in net unrealized (loss) gain on investments	(1)	8	(41)		(2)
Less income tax benefit (expense)	1	(3)	9		1
Reclassification of realized loss on investments included in net income	0	0	31	[1]	0
Less income tax benefit	0	0	(8)	[2]	0
Other comprehensive (loss) income, net of tax	(3,116)	2,540	(1,067)		56
Comprehensive (loss) income	$ (495)	$ 3,875	$ (3,372)		$ 5,079

[1] Recorded in Other income (expense), net on our Condensed Consolidated Statements of Operations.

[2] Recorded in Income tax provision (benefit) in our Condensed Consolidated Statements of Operations.