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Note 9 - Pension Plans (Tables)
12 Months Ended
Apr. 29, 2017
Notes Tables  
Schedule of Multiemployer Plans [Table Text Block]
   
(In thousands)
 
   
Fiscal
   
Fiscal
   
Fiscal
 
Pension Fund
 
2017
   
2016
   
2015
 
CSSS Fund
  $
1,262
    $
1,172
    $
1,103
 
WCT Fund
   
477
     
485
     
637
 
Other multi-employer pension funds
   
201
     
448
     
306
 
Total
  $
1,940
    $
2,105
    $
2,046