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Investments | 12 Months Ended
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Sep. 30, 2017
Investments All Other Investments [Abstract] |
Investments | NOTE 4. INVESTMENTS The Company invests a portion of its excess cash balances in short-term debt securities and may, from time to time, also invest in long-term debt securities. Investments at September 30, 2017 consisted of corporate bonds with maturities remaining of less than one year. The Company may also invest excess cash balances in certificates of deposits, money market accounts, government-sponsored enterprise securities, corporate bonds and/or commercial paper. The Company accounts for its investments in accordance with FASB ASC 320, Investments – Debt and Equity Securities. At September 30, 2017, all investments were classified as held-to-maturity securities. The following tables summarize the Company’s short-term investments as of September 30, 2017, and September 30, 2016.
| As of September 30, 2017 |
| Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Commercial notes (due within one year) | $ | 40,769,539 |  |  | $ | — |  |  | $ | (334,755) |  |  | $ | 40,434,784 |
| As of September 30, 2016 |
| Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Commercial notes (due within one year) | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |

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- Definition The entire disclosure for cost method and equity method investments included basis, impairment losses, recognized or unrecognized gains (losses). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2197087 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI http://asc.fasb.org/topic&trid=2196965 + Details
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