Summary of Business and Significant Accounting Policies (Advertising Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Accounting Policies [Abstract]
Advertising cost	$ 1,057	$ 1,277	$ 1,246
Prepaid advertising costs	$ 234	$ 244