Summary of Inventory Values by Product Group (Detail) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Schedule Of Inventory By Segment [Line Items]
Inventory, Net	$ 39,219,168	$ 36,753,680
Prime Coil Inventory
Schedule Of Inventory By Segment [Line Items]
Raw Materials	10,981,835	8,562,607
Non-Standard Coil Inventory
Schedule Of Inventory By Segment [Line Items]
Finished Goods	3,741,718	1,853,445
Tubular
Schedule Of Inventory By Segment [Line Items]
Raw Materials	3,308,419	6,859,871
Finished Goods	$ 21,187,196	$ 19,477,757