Note 4 - Revolving Credit Facility (Details Textual) - USD ($)		3 Months Ended
	Jul. 05, 2016	Jun. 30, 2018	Jul. 01, 2017
Long-term Line of Credit, Total		$ 207,610,000
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 Inventories, Excluding Inventories Acquired in a Business Combination		$ 10,004,000
Revolving Credit Facility [Member]
Debt Instrument, Term	5 years
Line of Credit Facility, Maximum Borrowing Capacity During Nonproduction Period		400,000,000
Line of Credit Facility, Maximum Borrowing Capacity During Production Period		500,000,000
Long-term Line of Credit, Total		207,610,000	$ 226,010,000
Line of Credit Facility, Impact on Average Amount Borrowed, Results of Operations		$ 16,397,000