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Fair value measurements (Tables)
3 Months Ended
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.