Accumulated Other Comprehensive Income Loss (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Accumulated other comprehensive income (loss)	$ (1,064)	$ (225)	$ 170
Other comprehensive income before reclassifications		(820)	(394)
Amounts reclassified from accumulated other comprehensive income		(19)	(1)
Net period other comprehensive income (loss)	(1,432)	(839)	(395)
Accumulated other comprehensive income (loss)	(2,496)	(1,064)	(225)
Unrealized Gains and Losses on Available-for-Sale Securities
Accumulated other comprehensive income (loss)		30	(12)
Other comprehensive income before reclassifications		(11)	43
Amounts reclassified from accumulated other comprehensive income		(19)	(1)
Net period other comprehensive income (loss)	(26)	(30)	42
Accumulated other comprehensive income (loss)	(26)		30
Foreign Currency Translation Adjustments
Accumulated other comprehensive income (loss)	(1,064)	(255)	182
Other comprehensive income before reclassifications		(809)	(437)
Net period other comprehensive income (loss)	(1,406)	(809)	(437)
Accumulated other comprehensive income (loss)	$ (2,470)	$ (1,064)	$ (255)