Nature Of Business And Summary Of Significant Accounting Policies (Schedule Of Allowance For Doubtful Accounts) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Nature Of Business And Summary Of Significant Accounting Policies [Abstract]
Allowance for doubtful accounts balance - beginning of year	$ 78	$ 129	$ 160
Additions to the allowance for doubtful accounts	93	92	99
Deductions against the allowance for doubtful accounts	(64)	(143)	(130)
Allowance for doubtful accounts balance - end of year	$ 107	$ 78	$ 129