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Note 2 - Revenue Recognition (Tables)
3 Months Ended
Dec. 31, 2024
Notes Tables  
Disaggregation of Revenue [Table Text Block]
  

Three Months Ended

 
  

December 31, 2024

  

December 31, 2023

 

Smart Water

 $7,288  $4,234 

Energy Solutions

  19,826   33,706 

Intelligent Industrial

  5,531   5,774 

Total

 $32,645  $43,714 
Revenue from External Customers by Geographic Areas [Table Text Block]
  

Three Months Ended

 
  

December 31, 2024

  

December 31, 2023

 

Asia (including Russian Federation)

 $18,057  $32,216 

Canada

  369   1,226 

Europe

  1,398   1,378 

Mexico

  1,281   166 

United States

  11,423   8,418 

Other

  117   310 

Total

 $32,645  $43,714