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11. Employee Benefit Plans (Details) - Schedule of Net Benefit Costs - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 28, 2018
Oct. 29, 2017
Oct. 28, 2018
Oct. 29, 2017
Net periodic benefit costs        
Service cost $ 81 $ 76 $ 243 $ 228
Interest cost 206 280 618 839
Actuarial loss 43 15 129 45
Expected return on pension plan assets (144) (234) (431) (700)
Expected administrative expenses 70 70 210 210
Consolidated net periodic benefit costs $ 256 $ 207 $ 769 $ 622