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Summary of Business and Significant Accounting Policies (Advertising Costs) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Jan. 31, 2013
Accounting Policies [Abstract]      
Advertising cost $ 1,277us-gaap_AdvertisingExpense $ 1,246us-gaap_AdvertisingExpense $ 1,103us-gaap_AdvertisingExpense
Prepaid advertising costs $ 244us-gaap_PrepaidAdvertising $ 242us-gaap_PrepaidAdvertising