Summary of Business and Significant Accounting Policies (Advertising Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Accounting Policies [Abstract]
Advertising cost	$ 945	$ 1,057	$ 1,277
Prepaid advertising costs	$ 326	$ 234