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Note 19 - Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Fair Value, by Balance Sheet Grouping [Table Text Block]
  

December 31

 
  

2021

  

2020

 
  

Carrying

  

Fair

  

Carrying

  

Fair

 
  

Amount

  

Value

  

Amount

  

Value

 

Assets

                

Cash and cash equivalents

 $20,780  $20,780  $18,752  $18,752 

Restricted cash

  39   39   37   37 

Short-term investments

  29,186   29,186   29,054   29,054 

Long-term investments

  992   992   992   992