Consolidated Statement of Comprehensive Income (Loss) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income		$ 6,588	$ 1,751	$ 5,805
Other comprehensive loss, net of tax:
Foreign currency translation adjustment		(4,323)	(2,713)	(1,826)
Change in net unrealized (loss) gain on investments		(21)	43	(63)
Less income tax benefit (provision)		7	(17)	24
Reclassification of realized loss on investments included in net income	[1]	1	0	0
Other comprehensive loss, net of tax		(4,336)	(2,687)	(1,865)
Comprehensive income (loss)		$ 2,252	$ (936)	$ 3,940

[1] Recorded in Other income, net in our Consolidated Statements of Operations.