Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements Using Significant Unobservable Inputs (Level 3) - 2015 Private Placement (Detail)

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Fair Value Measurements Using Significant Unobservable Inputs (Level 3) - 2015 Private Placement (Detail) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Private Placement [Line Items]        
Adjustments to estimated fair value $ 0 $ 0 $ 0 $ (7,541,693)
2015 Private Placement Financing | Fair Value, Inputs, Level 3 [Member]        
Private Placement [Line Items]        
Balance     0  
Issuances     2,458,204  
Adjustments to estimated fair value     0  
Balance $ 2,458,204   $ 2,458,204