Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income		$ 4,277	$ 2,496	$ 12,864	$ 3,603
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment		(1,272)	1,571	(1,718)	(4,158)
Change in net unrealized gain (loss) on investments		6	4	49	(2)
Less income tax (provision) benefit		(2)	(1)	(18)	1
Reclassification of realized loss (gain) on investments included in net income (1)	[1]	0	0	(7)	1
Less income tax benefit (2)	[2]	0	0	3	0
Other comprehensive loss (income), net of tax		(1,268)	1,574	(1,691)	(4,158)
Comprehensive income (loss)		$ 3,009	$ 4,070	$ 11,173	$ (555)

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

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