INVENTORIES (Tables)
 12 Months Ended
Jan. 31, 2013
INVENTORIES [Abstract]  
Inventories
Inventories consisted of the following:

   
January 31,
 
   
2013
  
2012
 
Raw materials
 $13,262,612  $12,673,210 
Work in process
  2,966,664   2,808,747 
Finished goods
  1,641,444   2,365,186 
   $17,870,720  $17,847,143