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Note C - Inventories (Tables)
6 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
 
 
September 30,
2016
 
 
March 31,
2016
 
Prime Coil Inventory
  $ 7,861,254     $ 14,168,626  
Non-Standard Coil Inventory
    1,191,310       992,163  
Tubular Raw Material
    1,258,110       1,566,048  
Tubular Finished Goods
    23,740,730       25,212,291  
    $ 34,051,404     $ 41,939,128