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Note 2 - Certain Significant Estimates (Tables)
12 Months Ended
Dec. 31, 2025
SEC Schedule, 12-09, Allowance, Credit Loss [Member]  
Notes Tables  
Valuation and Qualifying Accounts [Table Text Block]

In Thousands

 

2025

   

2024

 
                 

Beginning balance

  $ 694     $ 652  

Additions

    983       747  

Deductions

    (451 )     (705 )

Ending balance

  $ 1,226     $ 694  
SEC Schedule, 12-09, Reserve, Warranty [Member]  
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]

In Thousands

 

2025

   

2024

 
                 

Beginning balance

  $ 649     $ 590  

Additions

    1,012       1,690  

Deductions

    (1,043 )     (1,631 )

Ending balance

  $ 618     $ 649