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Note C - Inventories (Tables)
3 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
June 30,
201
9
   
Ma
rch 31,
2019
 
Prime Coil Inventory
  $
20,253,958
    $
26,240,439
 
Non-Standard Coil Inventory
   
2,431,599
     
2,078,008
 
Tubular Raw Material
   
5,359,827
     
4,418,750
 
Tubular Finished Goods
   
15,711,662
     
16,324,889
 
    $
43,757,046
    $
49,062,086