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Fair value measurements (Tables) | 3 Months Ended
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Mar. 31, 2019
Fair Value Disclosures [Abstract] |
Fair Value, Assets Measured on Recurring Basis [Table Text Block] | The following table summarizes investments that are recognized in our consolidated balance sheet using fair value measurements (excludes investments classified as equity method investments) determined based upon the differing levels as of March 31, 2019:
| Level 1 | Level 2 | Level 3 | Total
Cash equivalents | $ | 68,572,210 |  | $ | — |  | $ | — |  | $ | 68,572,210 |
Fair value investments |  |  |  |
Securities held in Consolidated Funds(a) | 16,967,373 |  | 62,030,035 |  | — |  | $ | 78,997,408 |
Company sponsored investments | 39,533,699 |  | — |  | — |  | $ | 39,533,699 |
(a) Of the securities held in the Consolidated Funds as of March 31, 2019, $48.8 million were held directly by the Company and $30.2 million were held by noncontrolling shareholders.

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class 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 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99377789&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 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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