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12. Income Taxes (Details) - USD ($)
3 Months Ended 6 Months Ended
Jul. 29, 2018
Apr. 29, 2018
Jul. 30, 2017
Jul. 29, 2018
Jul. 30, 2017
Jan. 28, 2018
12. Income Taxes (Details) [Line Items]            
Income Tax Expense (Benefit) $ 2,881,000   $ 4,234,000 $ 4,730,000 $ 6,568,000  
Effective Income Tax Rate Reconciliation, Percent 24.90%   35.20% 23.00% 34.40%  
Reclassification from AOCI, Current Period, Tax $ 0 $ 111,000 $ 0 $ 111,000 $ 0  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 80,000     80,000   $ 81,000
Prior Period Adjustments for Adoption of ASU 2017-09 [Member]            
12. Income Taxes (Details) [Line Items]            
Prior Period Reclassification Adjustment       $ 120,000