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Note 7 - Other Income and Loss (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
  

Year Ended December 31,

 
  

2021

  

2020

 

Interest income

 $34  $24 

Other income (loss)

  1,616   (59)

Total other income (loss)

 $1,650  $(35)