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Fair Value Measurements - Reconciliation of Derivative Liability (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
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |  |  |  |
Change in value | $ (102,763) | $ 737,072 | $ 2,268,798 | $ (5,680,540) |
Exchange rights |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |  |  |  |
Value, Beginning balance |  |  | 216,429 | 4,569 | $ 4,569
Change in value |  |  | (177,605) |  | 211,860
Net settlements |  |  | (3,072) |  |
Value, Ending balance | 35,752 |  | 35,752 |  | 216,429
Warrant |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |  |  |  |
Value, Beginning balance |  |  | 3,957,514 | $ 4,091,797 | 4,091,797
Change in value |  |  | (2,268,798) |  | 5,821,796
Net settlements |  |  |  |  | (5,956,079)
Value, Ending balance | $ 1,688,716 |  | $ 1,688,716 |  | $ 3,957,514

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- Definition Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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