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Note 13 - Major Customers (Tables)
12 Months Ended
Mar. 28, 2021
Notes Tables  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
   
Fiscal Year
 
   
2021
   
2020
 
Walmart Inc.
   
43
%    
42
%
Amazon.com, Inc.
   
25
%    
20
%