Summary of Inventory Values by Product Group (Detail) (USD $)	Sep. 30, 2013	Mar. 31, 2013
Inventory [Line Items]
Inventory, Net	$ 39,497,612	$ 39,219,168
Prime Coil Inventory
Inventory [Line Items]
Raw Materials	9,733,435	10,981,835
Non-Standard Coil Inventory
Inventory [Line Items]
Raw Materials	2,594,457	3,741,718
Tubular
Inventory [Line Items]
Raw Materials	4,018,007	3,308,419
Finished Goods	$ 23,151,713	$ 21,187,196