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Note C - Inventories (Tables)
9 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
December 31, 201
9
   
March 31, 201
9
 
Prime Coil Inventory
  $
17,659,023
    $
26,240,439
 
Non-Standard Coil Inventory
   
2,139,267
     
2,078,008
 
Tubular Raw Material
   
2,823,269
     
4,418,750
 
Tubular Finished Goods
   
12,922,330
     
16,324,889
 
    $
35,543,889
    $
49,062,086