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Note 5 - Revolving Credit Facility (Details Textual) - USD ($)
6 Months Ended 12 Months Ended
Apr. 03, 2017
Jul. 05, 2016
Sep. 30, 2017
Sep. 30, 2017
Oct. 01, 2016
Accounts Receivable, Vegetable and Fruit Products Sold, Standard Payment Term     90 days    
Accounts Receivable, Vegetable and Fruit Products Sold, Maximum Payment Term     210 days    
Increase (Decrease) in Accounts Receivable, Excluding Receivables Acquired from Business Combinations     $ 3,526,000    
Increase (Decrease) in Inventories, Excluding Inventories Acquired in a Business Combination     41,386,000    
Truitt Bros. Inc. [Member]          
Business Combination, Consideration Transferred, Total $ 14,420,000   14,420,000    
Farm Credit [Member] | Term Loan [Member]          
Debt Instrument, Face Amount     100,000,000 $ 100,000,000  
Revolving Credit Facility [Member]          
Debt Instrument, Term   5 years      
Line of Credit Facility, Maximum Borrowing Capacity During Nonproduction Period     400,000,000 400,000,000  
Line of Credit Facility, Maximum Borrowing Capacity During Production Period     500,000,000 500,000,000  
Long-term Line of Credit, Total     $ 272,609,000 272,609,000 $ 342,935,000
Line of Credit Facility, Impact on Average Amount Borrowed, Results of Operations       $ 4,171,000