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Note 2 - Property, Plant and Equipment (Tables)
3 Months Ended
Jul. 31, 2021
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

(In thousands)

  

July 31,

2021

  

May 1,

2021

 

Land

 $9,835  $9,835 

Buildings and improvements

  62,785   62,346 

Machinery and equipment

  261,244   257,119 

Total

  333,864   329,300 

Less accumulated depreciation

  (201,947)  (198,273)

Property, plant and equipment – net

 $131,917  $131,027