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Inventory - Net (Tables)
6 Months Ended
Sep. 30, 2025
Inventory - Net [Abstract]  
Inventory Net
Inventory — net is comprised of the following:
 
         
     September 30, 2025      March 31, 2025  
Inventory — net
         
Raw materials
 $154,168,000   $150,274,000 
Work-in-process
  9,607,000    7,821,000 
Finished goods
  209,538,000    202,078,000 
    373,313,000    360,173,000 
Less allowance for excess and obsolete inventory
  (19,019,000   (18,964,000
Inventory
  354,294,000    341,209,000 
Inventory unreturned
  18,296,000    18,460,000 
Total inventory — net
 $372,590,000   $359,669,000