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Investments | 6 Months Ended
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Mar. 31, 2020
Held To Maturity Securities Classified [Abstract] |
Investments | NOTE 4. INVESTMENTS The Company invests a portion of its excess cash balances in short-term and long-term debt securities. Investments at March 31, 2020 consisted of corporate bonds with maturities remaining of less than or equal to 36 months. 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 March 31, 2020, all investments were classified as held-to-maturity securities. The following tables summarize the Company’s short-term and long-term investments as of March 31, 2020, and September 30, 2019.
|  | As of March 31, 2020 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Commercial notes (due within one year) |  | $ | 50,959,058 |  |  | $ | 264,194 |  |  | $ | (37,786) |  |  | $ | 51,185,466 |
Commercial notes (due within one through three years) |  | $ | 190,618,075 |  |  | $ | 1,735,812 |  |  | $ | (1,481,115) |  |  | $ | 190,872,772 |
Total |  | $ | 241,577,133 |  |  | $ | 2,000,006 |  |  | $ | (1,518,901) |  |  | $ | 242,058,238‬ |
|  | As of September 30, 2019 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Commercial notes (due within one year) |  | $ | 36,899,894 |  |  | $ | 222,584 |  |  | $ | — |  |  | $ | 37,122,478 |
Commercial notes (due within one through three years) |  | $ | 44,175,993 |  |  | $ | 875,258 |  |  | $ | — |  |  | $ | 45,051,251 |
Total |  | $ | 81,075,887 |  |  | $ | 1,097,842 |  |  | $ | — |  |  | $ | 82,173,729 |

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 + Details
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