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Note 7 - Debt - Long-term Debt (Details) - USD ($)
$ in Thousands
Aug. 28, 2016
May 29, 2016
Real Estate Loan [Member]    
Long-term debt $ 13,909 $ 14,167
Capital Equipment Loan 1 [Member]    
Long-term debt 5,442 5,904
Capital Equipment Loan 2 [Member]    
Long-term debt 5,324 5,558
Capital Equipment Loan 3 [Member]    
Long-term debt 3,238 3,375
Capital Equipment Loan 4 [Member]    
Long-term debt 2,975 3,158
Real Estate Loan 2 [Member]    
Long-term debt 7,526 7,622
Capital Equipment Loan 5 [Member]    
Long-term debt 8,548 8,873
Capital Equipment Loan 6 [Member]    
Long-term debt 3,742 3,940
Industrial Revenue Bonds [Member]    
Long-term debt 2,065 2,065
Long-term debt 52,769 54,662
Less: unamortized debt issuance costs (773) (817)
Long-term Debt 51,996 53,845
Less: current portion of long-term debt, net (7,930) (7,873)
Long-term debt, net $ 44,066 $ 45,972