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Fair Value Measurements (Tables) | 12 Months Ended
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Sep. 30, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |
Fair Value Measurements for Assets and Liabilities Measured at Fair Value on Recurring Basis | The following table summarizes fair value measurements at September 30, 2015 and September 30, 2014 for assets and liabilities measured at fair value on a recurring basis: September 30, 2015:
| Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash and cash equivalents | $ | 81,214,354 |  |  | $ | — |  |  | $ | — |  |  | $ | 81,214,354 |
Derivative liabilities | $ | — |  |  | $ | — |  |  | $ | 1,301,604 |  |  | $ | 1,301,604 |
Acquisition-related contingent consideration obligations | $ | — |  |  | $ | — |  |  | $ | 5,862,464 |  |  | $ | 5,862,464 |
September 30, 2014:
| Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash and cash equivalents | $ | 132,510,610 |  |  | $ | — |  |  | $ | — |  |  | $ | 132,510,610 |
Derivative liabilities | $ | — |  |  | $ | — |  |  | $ | 4,173,943 |  |  | $ | 4,173,943 |
Acquisition-related contingent consideration obligations | $ | — |  |  | $ | — |  |  | $ | 3,970,931 |  |  | $ | 3,970,931 |
Change in Fair Value of Contingent Consideration Obligations | The following is a reconciliation of contingent consideration fair value:
Value at September 30, 2013 | $ | 1,595,273 |
Purchase price contingent consideration |  | — |
Contingent consideration payments |  | — |
Change in fair value of contingent consideration |  | 2,375,658 |
Value at September 30, 2014 | $ | 3,970,931 |
Purchase price contingent consideration |  | — |
Contingent consideration payments |  | — |
Change in fair value of contingent consideration |  | 1,891,533 |
Value at September 30, 2015 | $ | 5,862,464 |
Exchange rights |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |
Assumptions Used in Valuing Derivative Liabilities | The assumptions used in valuing the derivative liability were as follows:
| September 30, 2015 |  | September 30, 2014 | September 30, 2013
Risk-free interest rate | 1.00% |  | 1.07% | 1.39%
Expected life | 2.5 Years |  | 3.3 Years | 4.3 Years
Dividend yield | - |  | - | -
Volatility | 75% |  | 100% | 100%
Reconciliation of Derivative Liability | The following is a reconciliation of the derivative liability related to these exchange rights:
Value at September 30, 2013 | $ | 4,569 |
Issuance of instruments |  | — |
Change in value |  | 211,860 |
Net settlements |  | — |
Value at September 30, 2014 | $ | 216,429 |
Issuance of instruments |  | — |
Change in value |  | (184,555 | )
Net settlements |  | (3,072) |
Value at September 30, 2015 | $ | 28,802 |
Warrant |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |
Assumptions Used in Valuing Derivative Liabilities | The assumptions used in valuing the derivative liability were as follows:
2010 Warrants |  | September 30, 2015 |  |  | September 30, 2014 |  | September 30, 2013
Risk-free interest rate |  | 0.1% |  |  | 0.13% |  | 0.33%
Expected life |  | 0.2 Years |  |  | 1.2 Years |  | 2.2 Years
Dividend yield |  | - |  |  | - |  | -
Volatility |  | 75% |  |  | 69% |  | 69%
2012 Warrants |  | September 30, 2015 |  |  | September 30, 2014 |  | September 30, 2013
Risk-free interest rate |  | 0.6% |  |  | 1.07% |  | 1.39%
Expected life |  | 2.2 Years |  |  | 3.2 Years |  | 4.2 Years
Dividend yield |  | - |  |  | - |  | -
Volatility |  | 75% |  |  | 69% |  | 69%
2013 Warrants |  | September 30, 2015 |  |  | September 30, 2014 |  | September 30, 2013
Risk-free interest rate |  | 0.6% |  |  | 1.07% |  | 1.39%
Expected life |  | 2.3 Years |  |  | 3.3 Years |  | 4.3 Years
Dividend yield |  | - |  |  | - |  | -
Volatility |  | 75% |  |  | 69% |  | 69%
Reconciliation of Derivative Liability | The following is a reconciliation of the derivative liability related to these warrants:
Value at September 30, 2013 | $ | 4,091,797 |
Issuance of instruments |  | — |
Change in value |  | 5,821,796 |
Net settlements |  | (5,956,079 | )
Value at September 30, 2014 | $ | 3,957,514 |
Issuance of instruments |  | — |
Change in value |  | (2,684,712) |
Net settlements |  | — |
Value at September 30, 2015 | $ | 1,272,802 |

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- Definition Tabular disclosure of the inputs and valuation techniques used to measure fair value, and a discussion of changes in valuation techniques and related inputs, if any, applied during the period to each separate class of assets, liabilities, and financial instruments classified in shareholders' equity that are measured on a recurring and/or nonrecurring basis. + 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 (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of contingent payment arrangements including the terms that will result in payment and the accounting treatment that will be followed if such contingencies occur, including the potential impact on earnings per share if contingencies are to be settled in common stock of the entity. The description also may include the period over which amounts are expected to be paid, and changes in the amount since the previous reporting period. This also includes contingent options and commitments. + References No definition available. + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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