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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2020
Fair Value Disclosures [Abstract] |
Fair value hierarchy of assets and liabilities | The following provides the hierarchy of inputs used to derive fair value of Artisan’s assets and liabilities that are financial instruments as of September 30, 2020 and December 31, 2019:
| Assets and Liabilities at Fair Value
| Total |  | NAV Practical Expedient (No Fair Value Level) |  | Level 1 |  | Level 2 |  | Level 3
September 30, 2020 |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Money market funds | $ | 70,854 |  |  | $ | — |  |  | $ | 70,854 |  |  | $ | — |  |  | $ | — |
Equity securities | 6,737 |  |  | 50 |  |  | 6,687 |  |  | — |  |  | — |
December 31, 2019 |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Money market funds | $ | 30,673 |  |  | $ | — |  |  | $ | 30,673 |  |  | $ | — |  |  | $ | — |
Equity securities | 23,878 |  |  | 15,068 |  |  | 8,810 |  |  | — |  |  | — |

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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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