Purchased Intangible Assets (Schedule of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 9,178	$ 9,463	$ 1,301
Addition		3,976	8,162
Impairment	0	(4,261)	0
Goodwill, Ending Balance	$ 9,178	$ 9,178	$ 9,463