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Note C - Inventories (Tables)
3 Months Ended
Jun. 30, 2016
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
 
 
June 30,
2016
 
 
March 31,
2016
 
Prime Coil Inventory
  $ 12,678,396     $ 14,168,626  
Non-Standard Coil Inventory
    1,504,441       992,163  
Tubular Raw Material
    358,570       1,566,048  
Tubular Finished Goods
    25,318,125       25,212,291  
    $ 39,859,532     $ 41,939,128