Income Taxes (Details 3) (USD $)	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009	Oct. 01, 2007
Reconciliation of unrecognized tax benefits
Unrecognized Tax Benefits, Beginning Balance	$ 51,000	$ 106,000	$ 486,000	$ 106,000
Reduction based on prior year tax positions	0	0	(380,000)
Additions based on current year tax positions	0	0	0
Reductions based on settlements with taxing authorities	0	0	0
Reductions due to lapse in statute of limitations	(51,000)	(55,000)	0
Unrecognized Tax Benefits, Ending Balance	$ 0	$ 51,000	$ 106,000	$ 106,000

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.

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