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10. Employee Benefit Plans (Details) - Schedule of Net Benefit Costs - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 29, 2018
Jul. 30, 2017
Jul. 29, 2018
Jul. 30, 2017
Net periodic benefit costs        
Service cost $ 81 $ 76 $ 163 $ 152
Interest cost 206 280 413 559
Actuarial loss 43 15 86 31
Expected return on pension plan assets (144) (234) (288) (467)
Expected administrative expenses 70 70 140 140
Consolidated net periodic benefit costs $ 256 $ 207 $ 514 $ 415