Organization and Significant Accounting Policies - Additional Information (Detail) (USD $)	9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
Schedule Of Investments [Line Items]
Cash to fund operations	$ 138,349,733	$ 29,025,930	$ 19,114,444	$ 3,377,288
Maturity description	less than 27 months
Net increase (decrease) in cash	119,235,289	25,648,642
Cash from issuance of equity	172,641,720	42,448,824
Cash from exercise of warrants and options	12,374,005
Net cash invested in fixed income investments	39,800,000
Cash outflow related to continuing operating activities	24,496,567	13,639,360
Capital expenditures	1,251,987	191,656
Restricted Cash	0		0
Amount insured in FDIC per account	250,000
Minority equity investment, book value	0
Minimum
Schedule Of Investments [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum
Schedule Of Investments [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Commercial Bonds
Schedule Of Investments [Line Items]
Investments	$ 50,100,000