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9. Employee Benefit Plans (Details) - Schedule of Net Benefit Costs - Supplemental Retirement Income Plan ("SRIP") [Member] - USD ($)
$ in Thousands
3 Months Ended
Apr. 29, 2018
Apr. 30, 2017
Net periodic benefit costs    
Service cost $ 82 $ 76
Interest cost 207 280
Actuarial loss 43 15
Expected return on pension plan assets (144) (234)
Expected administrative expenses 70 70
Consolidated net periodic benefit costs $ 257 $ 207