Summary of Inventory Values by Product Group (Detail) (USD $)	Jun. 30, 2013	Mar. 31, 2013
Inventory [Line Items]
Inventory, Net	$ 32,021,184	$ 39,219,168
Prime Coil Inventory
Inventory [Line Items]
Raw Materials	4,467,168	10,981,835
Non-Standard Coil Inventory
Inventory [Line Items]
Finished Goods	2,899,604	3,741,718
Tubular
Inventory [Line Items]
Raw Materials	872,657	3,308,419
Finished Goods	$ 23,781,755	$ 21,187,196