Fair Value Measurements Using Significant Unobservable Inputs (Level 3) - 2015 Private Placement (Detail) - USD ($) |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2015 |
Jun. 30, 2014 |
Sep. 30, 2014 |
|
| Private Placement [Line Items] | |||||
| Balance | $ 6,270,000 | ||||
| Adjustments to estimated fair value | $ 0 | $ 0 | 0 | $ (7,541,693) | |
| Balance | $ 6,270,000 | ||||
| Fair Value, Inputs, Level 3 [Member] | |||||
| Private Placement [Line Items] | |||||
| Balance | 6,270,000 | $ 0 | 0 | ||
| Issuances | 10,391,693 | ||||
| Adjustments to estimated fair value | 4,121,693 | ||||
| Balance | 6,270,000 | ||||
| 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 | $ 0 | ||