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Fair Value Measurements - Reconciliation of Derivative Liability (Detail) - USD ($) | 3 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Change in value | $ (21,574) | $ 2,179,651
Exchange rights |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Value, Beginning balance | 28,802 |
Change in value | 1,950 |
Value, Ending balance | 30,752 |
Warrant |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Value, Beginning balance | 1,272,802 |
Change in value | 21,574 |
Value, Ending balance | $ 1,294,376 |

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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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