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Stock-Based Compensation (Narrative) (Details) - Unvested Restricted Stock [Member] - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 28, 2018
Oct. 29, 2017
Oct. 28, 2018
Oct. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock compensation expense $ 0.4 $ 0.6 $ 1.3 $ 1.2
Unrecognized compensation expense $ 3.2   $ 3.2  
Unrecognized compensation expense, weighted average recognition period     2 years 3 months 18 days