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Fair Value Measurements (Tables) | 6 Months Ended
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Mar. 31, 2019
Fair Value Disclosures [Abstract] |
Fair Value Measurements for Assets and Liabilities Measured at Fair Value on Recurring Basis | The following table summarizes fair value measurements at March 31, 2019 and September 30, 2018 for assets and liabilities measured at fair value on a recurring basis: March 31, 2019:
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash and cash equivalents |  | $ | 161,639,208 |  |  | $ | — |  |  | $ | — |  |  | $ | 161,639,208 |
Short-term investments |  | $ | 56,450,065 |  |  | $ | — |  |  | $ | — |  |  | $ | 56,450,065 |
Long-term investments |  | $ | 68,239,526 |  |  | $ | — |  |  | $ | — |  |  | $ | 68,239,526 |
Contingent Consideration |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
September 30, 2018:
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash and cash equivalents |  | $ | 30,133,213 |  |  | $ | — |  |  | $ | — |  |  | $ | 30,133,213 |
Short-term investments |  | $ | 45,971,126 |  |  | $ | — |  |  | $ | — |  |  | $ | 45,971,126 |
Long-term investments |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Contingent Consideration |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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