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Note 4 - Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
 

Carrying

 

Fair Value Measurement at December 31, 2021

 

Value

 

Level 1

 

Level 2

 

Level 3

 

(in thousands)

Cash and cash equivalents

$ 24,739   $ 24,739   $   $
                       

Restricted cash

$ 25   $ 25   $   $
                       

Ownership interests

$ 4,549   $ 4,549   $   $
   

Carrying

   

Fair Value Measurement at December 31, 2020

 
   

Value

   

Level 1

   

Level 2

   

Level 3

 
   

(In thousands)

 

Cash and cash equivalents

  $ 15,601     $ 15,601     $     $