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Nature of Operations and Summary of Significant Accounting Policies (Details 2) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Components of comprehensive loss
Net loss	$ (2,393,275)	$ (2,847,356)	$ (3,752,917)	$ (2,821,082)
Other comprehensive loss:
Change in unrealized (losses) gains on marketable securities	(1,842)	5,118	2,536	10,049
Total comprehensive loss	$ (2,395,117)	$ (2,842,238)	$ (3,750,381)	$ (2,811,033)

X

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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