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Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities (Details) - USD ($) | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Investment securities, available for sale | $ 10,290,378 | $ 14,257,998
Earn-out milestone liability | 5,818,843 | 8,907,664
Corporate Debt Securities [Member] |  |
Investment securities, available for sale | 10,290,378 | 14,257,998
Fair Value, Measurements, Recurring [Member] |  |
Earn-out milestone liability | 5,818,843 | 8,907,664
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Earn-out milestone liability |  |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Earn-out milestone liability |  |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Earn-out milestone liability | 5,818,843 | 8,907,664
Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] |  |
Investment securities, available for sale | 10,290,378 | 14,257,998
Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Investment securities, available for sale |  |
Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Investment securities, available for sale | 10,290,378 | 14,257,998
Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Investment securities, available for sale |  |

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26626-111562 + Details
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