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Note 10 - Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  

Fair Value Measurements Using

 

June 30, 2024

 

Fair

Value

  

Quoted

Prices in

Active
Markets

For Identical

Assets

(Level 1)

  

Significant

Other

Observable

Inputs

(Level 2)

  

Significant

Unobservable

Inputs

(Level 3)

 

Cash and cash equivalents

 $136,214  $136,214  $  $ 

Restricted cash and cash equivalents

  29,391   29,391       

Marketable equity securities

  154,883   154,883       

Corporate debt securities

  56,024   40,169   15,855    

Asset–backed securities

  16,924      16,446   478 

U.S. Treasury securities

  43,094   43,094       

State and municipal securities

  3,753      3,753    

Total financial assets

 $440,283  $403,751  $36,054  $478 
  

Fair Value Measurements Using

 

December 31, 2023

 

Fair

Value

  

Quoted

Prices in

Active

Markets

For Identical

Assets

(Level 1)

  

Significant

Other

Observable

Inputs

(Level 2)

  

Significant

Unobservable

Inputs

(Level 3)

 

Cash and cash equivalents

 $107,076  $107,076  $  $ 

Restricted cash and cash equivalents

  18,892   18,892       

Marketable equity securities

  137,896   137,896       

Corporate debt securities

  60,171   42,860   17,311    

Asset–backed securities

  17,659      17,210   449 

U.S. Treasury securities

  45,850   45,850       

State and municipal securities

  4,047      4,047    

Total financial assets

 $391,591  $352,574  $38,568  $