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11. Employee Benefit Plans (Details) - Schedule of Net Benefit Costs - USD ($)
$ in Thousands
 12 Months Ended
May. 01, 2016
May. 03, 2015
SRIP:    
Consolidated net periodic benefit costs $ 244 $ 218
Supplemental Retirement Income Plan ("SRIP") [Member]    
SRIP:    
Service cost 94 101
Interest cost 85 72
Actuarial loss (gain) (18) 45
Total 161 218
Supplemental Executive Retirement Plan ("SREP") [Member]    
SRIP:    
Interest cost 22 0
Total 22 0
Pension Plan [Member]    
SRIP:    
Interest cost 188 0
Expected return on pension plan assets (197)  
Expected administrative expenses 70 0
Total $ 60 $ 0