Inventories, Change in Accounting Estimates and Inventory Adjustments (Tables)

9 Months Ended

Oct. 31, 2013

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following:

	October 31, 2013		January 31, 2013
Raw materials	$	17,059,057	$	16,361,872
Work-in-process		1,640,632		1,812,788
Finished goods		21,740,598		21,096,015
	$	40,440,287	$	39,270,675