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Note 9 - Debt (Details) - Future Minimum Principal Payments of Debt (USD $)
In Thousands, unless otherwise specified
May 26, 2013
May 27, 2012
Note 9 - Debt (Details) - Future Minimum Principal Payments of Debt [Line Items]    
FY 2014 $ 5,933  
FY 2015 6,056  
FY 2016 6,181  
FY 2017 3,319  
FY 2018 3,456  
Thereafter 15,360  
Total 40,305 47,317
GE RE Loans [Member]
   
Note 9 - Debt (Details) - Future Minimum Principal Payments of Debt [Line Items]    
FY 2014 928  
FY 2015 966  
FY 2016 1,005  
FY 2017 1,047  
FY 2018 1,089  
Thereafter 12,030  
Total 17,065  
GE Equipment [Member]
   
Note 9 - Debt (Details) - Future Minimum Principal Payments of Debt [Line Items]    
FY 2014 1,650  
FY 2015 1,725  
FY 2016 1,801  
FY 2017 1,882  
FY 2018 1,967  
Thereafter 2,055  
Total 11,080  
BMO Harris [Member]
   
Note 9 - Debt (Details) - Future Minimum Principal Payments of Debt [Line Items]    
FY 2014 3,000  
FY 2015 3,000  
FY 2016 3,000  
FY 2017 0  
FY 2018 0  
Thereafter 0  
Total 9,000  
IRB [Member]
   
Note 9 - Debt (Details) - Future Minimum Principal Payments of Debt [Line Items]    
FY 2014 355  
FY 2015 365  
FY 2016 375  
FY 2017 390  
FY 2018 400  
Thereafter 1,275  
Total $ 3,160