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Fair Value Measurements & Derivative Investments - Change in Fair Value of Contingent Consideration Obligations (Detail) (USD $)	Mar. 31, 2013	Sep. 30, 2012
Business Combinations [Abstract]
Value, Beginning balance	$ 173,621	$ 173,621
Purchase price contingent consideration		173,621
Contingent consideration payments
Change in fair value of contingent consideration
Value, Ending balance	$ 173,621	$ 173,621

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Business Acquisition Net Change In Fair Value Of Contingent Consideration

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Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.

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The amount of acquisition cost of a business combination allocated to preacquisition contingencies other than contingencies associated with income taxes.

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