Fair Value Measurements & Derivative Investments - Change in Fair Value of Contingent Consideration Obligations (Detail) (USD $)	12 Months Ended
Sep. 30, 2012	Jun. 30, 2013
Business Combinations [Abstract]
Value, Beginning balance	$ 0	$ 173,621
Purchase price contingent consideration	173,621
Value, Ending balance	$ 173,621	$ 173,621

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

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+ Details