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Note 4 - Restructuring of Operations (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
  

Employee Termination Benefits

  

Exit Costs

  

Total

 

Balance, December 31, 2021

 $11  $  $11 

Charges to restructuring

           

Adjustments of accruals

  (1)      (1)

Cash payments

  (1)      (1)

Balance, March 31, 2022

 $9  $  $9