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Note 8 - Related Party Transactions (Tables)
9 Months Ended
Dec. 27, 2015
Net Accounts Receivable [Member]  
Notes Tables  
Schedule of Related Party Transactions [Table Text Block]
 
 
December 27,
2015
 
 
March 29,
2015
 
Future and affiliates of Alonim
    14 %     6 %
Total Net Sales [Member]  
Notes Tables  
Schedule of Related Party Transactions [Table Text Block]
 
 
Three Months Ended
 
 
Nine
Months Ended
 
 
 
December
27,
2015
 
 
December
28,
2014
 
 
December
27
,
2015
 
 
December
28,
2014
 
Future and affiliates of Alonim
    23 %     19 %     25 %     22 %