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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2021
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 March 31, 2021 and December 31, 2020:
Assets and Liabilities at Fair Value
TotalNAV Practical Expedient (No Fair Value Level)Level 1Level 2Level 3
March 31, 2021
Assets
Money market funds$25,856 $— $25,856 $— $— 
Equity securities36,235 999 35,236 — — 
December 31, 2020
Assets
Money market funds$25,855 $— $25,855 $— $— 
Equity securities3,656 57 3,599 — —