Summary of Business and Significant Accounting Policies (Advertising Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Accounting Policies [Abstract]
Advertising cost	$ 1,103	$ 1,395	$ 1,118
Prepaid advertising costs	$ 248	$ 208