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Note 4 - Inventories (Tables)
12 Months Ended
Mar. 31, 2024
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

As of:

 
  

March 31,

  

March 31,

 
  

2024

  

2023

 

Finished products

 $795,993  $613,622 

In process

  125,027   75,123 

Raw materials and supplies

  276,454   284,593 
   1,197,474   973,338 

Less excess of FIFO cost over LIFO cost

  324,782   302,440 

Total inventories

 $872,692  $670,898