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Investments (Tables) | 12 Months Ended
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Sep. 30, 2013
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Summary of Investments by Type of Security | The following table summarizes investments by security type as of September 30, 2013 and 2012:
|  | September 30, 2013 |
|  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Market Value |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities, short-term |  | $ | 5,729,034 |  |  | $ | 2,378 |  |  | $ | (540 | ) |  | $ | 5,730,872 |
Corporate debt securities, long-term |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 5,729,034 |  |  | $ | 2,378 |  |  | $ | (540 | ) |  | $ | 5,730,872 |
|  | September 30, 2012 |
|  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Market Value |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities, short-term |  | $ | 5,818,549 |  |  | $ | 3,343 |  |  | $ | (2,355 | ) |  | $ | 5,819,537 |
Corporate debt securities, long-term |  |  | 2,087,294 |  |  |  | 684 |  |  |  | (2,288 | ) |  |  | 2,085,690 |
Total |  | $ | 7,905,843 |  |  | $ | 4,027 |  |  | $ | (4,643 | ) |  | $ | 7,905,227 |
Summary of Fair Value of Investments Measured on Recurring Basis | Based on the fair value hierarchy, all of the Company’s investments were classified as Level 2 at September 30, 2013 and 2012, as represented in the following table:
|  | 2013 |  |  | 2012 |
Short-term investments: |  |  |  |  |  |  |  |
Corporate debt securities |  |  |  |  |  |  |  |
Financial |  | $ | 3,411,661 |  |  | $ | 1,604,618 |
Industrial |  |  | 1,517,327 |  |  |  | 2,264,934 |
Utility |  |  | 401,984 |  |  |  | — |
Commercial paper |  |  |  |  |  |  |  |
Industrial |  |  | 399,900 |  |  |  | 348,817 |
Financial |  |  | — |  |  |  | 1,197,730 |
Certificate of deposit—financial |  |  | — |  |  |  | 403,438 |
Total short-term investments |  | $ | 5,730,872 |  |  | $ | 5,819,537 |
Long-term investments: |  |  |  |  |  |  |  |
Corporate debt securities |  |  |  |  |  |  |  |
Financial |  | $ | — |  |  | $ | 1,237,992 |
Industrial |  |  | — |  |  |  | 426,974 |
Utility |  |  | — |  |  |  | 420,724 |
Total long-term investments |  | $ | — |  |  | $ | 2,085,690 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + 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 (a,b,bb) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI http://asc.fasb.org/extlink&oid=25499696&loc=SL7498348-110258 Reference 3: 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=25499696&loc=d3e19279-110258 Reference 4: 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=25499696&loc=d3e19190-110258 + Details
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