Sales and Major Customers (Details Textual)	12 Months Ended
	Jan. 31, 2013 Person	Jan. 31, 2012 Person	Jan. 31, 2011 Person
Sales and Major Customers (Textual) [Abstract]
Percentage change in total revenues by one customer	10.00%	10.00%	10.00%
Number of customers with revenue exceeding 10% of total Company revenue	1	1	1