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Marketable Securities and Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2019
Fair Value Disclosures [Abstract] |
Financial assets and liabilities measured at fair value on a recurring basis | The following table presents the Company’s assets and liabilities that are measured at fair value on a recurring basis, and are determined using the following inputs as of September 30, 2019:
| Fair Value Measurements at
| September 30, 2019
| Total |  | Quoted Prices in Active Markets (Level 1) |  | Significant Other Unobservable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Assets: |  |  |  |  |  |  |
Money market funds | $ | 3,317,462 |  |  | $ | 3,317,462 |  |  | $ | — |  |  | $ | — |
Mutual funds | 77,945,753 |  |  | — |  |  | 77,945,753 |  |  | — |
Investment in affiliated entities | 7,996,757 |  |  | 7,996,757 |  |  | — |  |  | — |
Total assets | $ | 89,259,972 |  |  | $ | 11,314,219 |  |  | $ | 77,945,753 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |
Derivative liability (Note 9) | $ | 4,503,918 |  |  | $ | — |  |  | $ | — |  |  | 4,503,918 |
Total liabilities | $ | 4,503,918 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,503,918 |
The following table presents the Company’s assets that are measured at fair value on a recurring basis, and are determined using the following inputs as of December 31, 2018:
| Fair Value Measurements at
| December 31, 2018
| Total |  | Quoted Prices in Active Markets (Level 1) |  | Significant Other Unobservable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Assets: |  |  |  |  |  |  |
Money market funds | $ | 9,646,507 |  |  | $ | 9,646,507 |  |  | $ | — |  |  | $ | — |
Mutual funds | 57,314,871 |  |  | — |  |  | 57,314,871 |  |  | — |
US corporate debt securities | 223,981 |  |  | — |  |  | 223,981 |  |  | — |
Investment in affiliated entities | 9,405,913 |  |  | 9,405,913 |  |  | — |  |  | — |
Total assets | $ | 76,591,272 |  |  | $ | 19,052,420 |  |  | $ | 57,538,852 |  |  | $ | — |
Changes in fair value of the company's derivative liability | The following table presents the changes in fair value of the Company's derivative liability for the nine months ended September 30, 2019:
Balance at December 31, 2018 | $ | — |
Initial fair value upon issuance of the Bonds | 7,055,371 |
Change in fair value | (2,551,453 | )
Balance at September 30, 2019 | $ | 4,503,918 |

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 + Details
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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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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