Summary of Inventory Values by Product Group (Detail) (USD $)	Sep. 30, 2014	Mar. 31, 2014
Inventory [Line Items]
Inventory, Net	$ 40,046,075	$ 35,288,559
Prime Coil Inventory
Inventory [Line Items]
Raw Materials	10,153,094	7,685,177
Non-Standard Coil Inventory
Inventory [Line Items]
Raw Materials	2,819,969	2,572,787
Tubular
Inventory [Line Items]
Raw Materials	1,099,887	463,254
Finished Goods	$ 25,973,125	$ 24,567,341