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Discontinued Operations - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]
Income impact associated with discontinued operations	$ 0	$ 0	$ 0	$ 0
Total assets of discontinued operations	0		0
Total liabilities of discontinued operations	$ 0		$ 0
Additional litigation expense within discontinued operations		$ 100,000		$ 100,000

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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