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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2018
Fair Value Disclosures [Abstract]  
Schedule of fair value measurements
    As of December 31, 2018  
    Quoted Market Prices in Active Markets
(Level 1)		     Internal Models with Significant Observable
Market Parameters
(Level 2)		     Internal Models
with Significant Unobservable
Market Parameters
(Level 3)		     Total Fair Value
Reported in
Financial Statements		  
                         
Mutual Funds   $ 1,107     $ —     $ —     $ 1,107  

 

    As of December 31, 2017  
    Quoted Market Prices in Active Markets
(Level 1)		     Internal Models with Significant Observable
Market Parameters
(Level 2)		     Internal Models
with Significant Unobservable
Market Parameters
(Level 3)		    

Total Fair Value

Reported in

Financial Statements

  
                         
Mutual Funds   $ 1,098     $ —     $ —     $ 1,098