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Operating Lease Activities (Detail) (USD $)	12 Months Ended
Operating Lease Activities (Detail) (USD $)	Sep. 30, 2012
Operating Leased Assets [Line Items]
Minimum rentals	$ 1,993,000
Less sublease rentals	(405,000)
Net rent paid	$ 1,588,000

This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes.

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