Summary of Significant Accounting Policies (Allowance for Doubtful Accounts) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	$ 638	$ 517	$ 246
Provision	1,304	199	271
Write offs	(13)	(78)	0
Adjustment	917	0	0
Balance at end of year	$ 2,846	$ 638	$ 517