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Note D - Inventories (Tables)
9 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
December 31
, 2018
   
March 31, 2018
As Adjusted
 
Prime Coil Inventory
  $
32,052,655
    $
14,185,858
 
Non-Standard Coil Inventory
   
2,353,592
     
2,971,324
 
Tubular Raw Material
   
8,127,972
     
6,734,076
 
Tubular Finished Goods
   
16,880,816
     
21,438,176
 
    $
59,415,035
    $
45,329,434