Inventories (Tables)

6 Months Ended

Jul. 31, 2012

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following:

	July 31,		January 31,
	2012		2012
Raw materials	$	18,335,643	$	21,213,423
Work-in-process		2,659,855		1,790,510
Finished goods		22,023,716		22,664,422
	$	43,019,214	$	45,668,355