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Nature of Operations and Summary of Significant Accounting Policies - Components of Comprehensive Loss (Detail) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Comprehensive Income Net Of Tax [Abstract]
Net loss	$ (2,052,059)	$ (2,008,887)	$ (5,804,976)	$ (4,829,969)
Other comprehensive loss:
Change in unrealized gains (losses) on marketable securities	(5,481)	(1,072)	2,945	8,977
Total comprehensive loss	$ (2,057,540)	$ (2,009,959)	$ (5,807,921)	$ (4,820,992)

X

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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-Publisher FASB

-Name Accounting Standards Codification

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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