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Note 17 - Business Segments (Tables)
6 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
  

Three Months Ended September 30, 2025

  

Six Months Ended September 30, 2025

 
  

Grid

  

Wind

  

Unallocated

  

Total

  

Grid

  

Wind

  

Unallocated

  

Total

 

Segment operating income:

                                

Revenues

 $54,342  $11,520  $-  $65,862  $114,429  $23,791  $-  $138,220 
                                 

Less (a)

                                

Segment other operating expenses (b)

  53,064   9,833   -   62,897   108,994   20,616   -   129,610 

Segment operating income

 $1,278  $1,687  $-  $2,965  $5,435  $3,175  $-  $8,610 
  

Three Months Ended September 30, 2024

  

Six Months Ended September 30, 2024

 
  

Grid

  

Wind

  

Unallocated

  

Total

  

Grid

  

Wind

  

Unallocated

  

Total

 

Segment operating income:

                                

Revenues

 $46,936  $7,535  $-  $54,471  $79,272  $15,489  $-  $94,761 
                                 

Less (a)

                                

Segment other operating expenses (b)

  45,366   7,096   2,762   55,224   77,939   14,183   6,682   98,804 

Segment operating income (loss)

 $1,570  $439  $(2,762) $(753) $1,333  $1,306  $(6,682) $(4,043)
  

Three Months Ended September 30,

  

Six Months Ended September 30, 2025

 
  

2025

  

2024

  

2025

  

2024

 
                 

Operating income (loss):

 $2,965  $(753) $8,610  $(4,043)

Interest income, net

  2,269   979   3,201  $2,099 

Other expense, net

  (367)  (329)  (21)  (489)

Income (loss) before income tax expense (benefit)

 $4,867  $(103) $11,790  $(2,433)
  

Three Months Ended September 30,

  

Six Months Ended September 30, 2025

 
  

2025

  

2024

  

2025

  

2024

 

Grid

 $1,266  $1,376  $2,468  $2,363 

Wind

  31   11   57  $32 

Total

 $1,297  $1,387  $2,525  $2,395 
Reconciliation of Assets from Segment to Consolidated [Table Text Block]
  

September 30, 2025

  

March 31, 2025

 

Grid

 $209,101  $211,520 

Wind

  17,665   13,697 

Corporate assets

  218,837   85,304 

Total

 $445,603  $310,521