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13. Subsequent Events (Details)
3 Months Ended
Jun. 04, 2018
$ / shares
May 18, 2018
USD ($)
Apr. 29, 2018
$ / shares
Apr. 30, 2017
$ / shares
13. Subsequent Events (Details) [Line Items]        
Common Stock, Dividends, Per Share, Declared     $ 0.14 $ 0.12
Subsequent Event [Member]        
13. Subsequent Events (Details) [Line Items]        
Dividends Payable, Date Declared Jun. 04, 2018      
Common Stock, Dividends, Per Share, Declared $ 0.14      
Dividends Payable, Date to be Paid Jun. 29, 2018      
Dividends Payable, Date of Record Jun. 15, 2018      
Subsequent Event [Member] | Loss from Catastrophes [Member]        
13. Subsequent Events (Details) [Line Items]        
Number of Warehouses   2    
Loss Contingency, Estimated Recovery from Third Party   Based on current estimates, we believe that the costs associated with the recovery efforts will exceed our insurance deductible of $500,000.    
Loss Contingency, Estimate of Possible Loss | $   $ 500,000