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Note 6 - Inventory (Tables)
9 Months Ended
Jan. 31, 2024
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

January 31, 2024

  

April 30, 2023

 

Parts and raw material

 $6,743  $5,704 

Work in process

  

3,734

   3,194 

Finished goods

  60   49 

Total Inventory, net of allowance

 $10,537  $8,947