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Inventories
6 Months Ended
Jul. 31, 2013
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
4.
Inventories
Inventories consist of the following:
 
 
 
July 31, 2013
 
January 31, 2013
 
 
 
 
 
 
 
 
 
Raw materials
 
$
17,516,428
 
$
16,361,872
 
Work-in-process
 
 
2,252,192
 
 
1,812,788
 
Finished goods
 
 
20,649,740
 
 
21,096,015
 
 
 
$
40,418,360
 
$
39,270,675
 
 
Inventories include freight-in, materials, labor and overhead costs and are stated at the lower of cost (on a first-in, first-out basis) or market.