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Investments | 12 Months Ended
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Sep. 30, 2016
Investments All Other Investments [Abstract] |
Investments | NOTE 4. INVESTMENTS The Company had invested a portion of its excess cash balances in short-term and long-term debt securities. During the year ended September 30, 2016, the Company’s investments all matured, and the Company has not invested any excess cash at September 30, 2016. The Company may also invest excess cash balances in certificates of deposit, money market accounts, U.S. Treasuries, U.S. government agency obligations, corporate debt securities, and/or commercial paper. The Company has historically accounted for its investments in accordance with FASB ASC 320, Investments – Debt and Equity Securities. All investments historically have been classified as held-to-maturity securities. The following tables summarize the Company’s short-term investments as of September 30, 2016, and September 30, 2015.
| As of September 30, 2016 |
| Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Commercial notes (due within one year) | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
| As of September 30, 2015 |
| Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Commercial notes (due within one year) | $ | 17,539,902 |  |  | $ | — |  |  | $ | (304,942 | ) |  | $ | 17,234,960 |

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