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Investments (Tables) | 6 Months Ended
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Mar. 31, 2015
Investments Debt And Equity Securities [Abstract] |
Summary of Investments by Type of Security | The following table summarizes investments by type of security as of March 31, 2015:
|  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Market Value |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities, short-term |  | $ | 19,979,906 |  |  | $ | 998 |  |  | $ | (15,514 | ) |  | $ | 19,965,390 |
Corporate debt securities, long-term |  |  | 2,516,760 |  |  |  | 852 |  |  |  | — |  |  |  | 2,517,612 |
Total |  | $ | 22,496,666 |  |  | $ | 1,850 |  |  | $ | (15,514 | ) |  | $ | 22,483,002 |
The following table summarizes investments by type of security as of September 30, 2014:
|  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Market Value |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities, short-term |  | $ | 16,273,996 |  |  | $ | 1,472 |  |  | $ | (6,298 | ) |  | $ | 16,269,170 |
Corporate debt securities, long-term |  |  | 2,075,002 |  |  |  | — |  |  |  | (2,984 | ) |  |  | 2,072,018 |
Total |  | $ | 18,348,998 |  |  | $ | 1,472 |  |  | $ | (9,282 | ) |  | $ | 18,341,188 |
Summary of Fair Value of Investments Measured on Recurring Basis | Based on the fair value hierarchy, all of the Company’s investments are classified as Level 2, as represented in the following table:
|  | March 31, 2015 |  |  | September 30, 2014 |
Short-term investments: |  |  |  |  |  |  |  |
Corporate debt securities |  |  |  |  |  |  |  |
Financial |  | $ | 12,203,241 |  |  | $ | 9,334,140 |
Industrial |  |  | 5,853,130 |  |  |  | 3,980,772 |
Utility |  |  | 1,909,019 |  |  |  | 756,215 |
Commercial paper |  |  |  |  |  |  |  |
Financial |  |  | — |  |  |  | 2,198,043 |
Total short-term investments |  | $ | 19,965,390 |  |  | $ | 16,269,170 |
Long-term investments: |  |  |  |  |  |  |  |
Corporate debt securities |  |  |  |  |  |  |  |
Agency |  | $ | 999,740 |  |  | $ | — |
Financial |  |  | 766,410 |  |  |  | 1,564,505 |
Industrial |  |  | 751,462 |  |  |  | — |
Utility |  |  | — |  |  |  | 507,513 |
Total long-term investments |  | $ | 2,517,612 |  |  | $ | 2,072,018 |

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + 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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