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Note D - Inventories (Tables)
3 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
 
 
June 30,
2017
 
 
March 31,
2017
 
Prime Coil Inventory
  $
11,648,170
    $
8,481,605
 
Non-Standard Coil Inventory
   
2,086,410
     
1,119,170
 
Tubular Raw Material
   
2,239,599
     
1,480,730
 
Tubular Finished Goods
   
23,441,562
     
23,837,045
 
    $
39,415,741
    $
34,918,550