Commitments And Contingencies (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Commitments And Contingencies [Line Items]
Rental expense	$ 454,000	$ 352,000	$ 301,000
Royalty Expense	$ 1,161,000	$ 1,630,000	$ 1,436,000
Minimum [Member]
Commitments And Contingencies [Line Items]
Royalties as percentage of revenue	7.00%
Maximum [Member]
Commitments And Contingencies [Line Items]
Royalties as percentage of revenue	50.00%