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11. Income Taxes (Details) - USD ($)
3 Months Ended
Apr. 29, 2018
Apr. 30, 2017
Jan. 28, 2018
11. Income Taxes (Details) [Line Items]      
Income Tax Expense (Benefit) $ 1,849,000 $ 2,334,000  
Effective Income Tax Rate Reconciliation, Percent 20.50% 33.00%  
Reclassification from AOCI, Current Period, Tax $ 111,000 $ 0  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 80,000   $ 80,000
Prior Period Adjustments for Adoption of ASU 2017-09 [Member]      
11. Income Taxes (Details) [Line Items]      
Prior Period Reclassification Adjustment $ 120,000