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Note 7 - Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Lease, Cost [Table Text Block]
  

Three Months Ended June 30,

  

Six Months Ended June 30,

 
  

2024

  

2023

  

2024

  

2023

 

Lease cost:

                

Operating lease cost

 $38  $33  $75  $65 

Variable lease cost

  7   7   10   14 

Total

 $45  $40  $85  $79