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Long-Term Debt (Details) - Wells Fargo Bank [Member] - USD ($)
6 Months Ended
Nov. 24, 2014
Oct. 24, 2013
Jan. 08, 2010
Oct. 31, 2015
Mortgage [Member]        
Debt Instrument [Line Items]        
Mortgage agreement, amount     $ 2,500,000  
Mortgage agreement, final payment $ 2,289,500   $ 2,000,000  
Mortgage agreement, interest rate     6.42%  
Mortgage agreement, maturity date Nov. 08, 2019      
Mortgage agreement, monthly principal payment $ 9,500      
Mortgage agreement, payable period       60 months
Outstanding amount       $ 2,745,500
Debt, amortization period     60 months  
Mortgage 2 [Member]        
Debt Instrument [Line Items]        
Mortgage agreement, amount   $ 1,275,000    
Mortgage agreement, final payment   $ 1,030,000    
Mortgage agreement, interest rate   4.50%    
Mortgage agreement, maturity date   Oct. 01, 2018    
Mortgage agreement, monthly principal payment   $ 4,250    
Mortgage agreement, payable period       60 months
Outstanding amount       $ 1,173,000
LIBOR [Member] | Mortgage [Member]        
Debt Instrument [Line Items]        
Mortgage agreement, interest rate       2.25%
Mortgage agreement, effective interest rate       2.625%
Senior Secured Credit Facility [Member]        
Debt Instrument [Line Items]        
Credit facility credit limit       $ 30,000,000
Expiration date       Oct. 31, 2017
Equity ownership in foreign entities pledged as collateral, percentage       65.00%
Fixed interest rate       2.25%
Effective interest rate       3.25%
Variable interest rate       1.00%
Receivable borrowing base, percentage       85.00%
Inventory borrowing base, percentage       50.00%
Outstanding balance under the credit facility       $ 21,000,000
Unused availability under the credit facility       $ 6,856,069
Senior Secured Credit Facility [Member] | LIBOR [Member]        
Debt Instrument [Line Items]        
Effective interest rate       2.625%
Variable interest rate       2.25%
Senior Secured Credit Facility Over Advance [Member]        
Debt Instrument [Line Items]        
Credit facility credit limit       $ 5,000,000
Expiration date       Oct. 31, 2015
Senior Secured Credit Facility Over Advance [Member] | LIBOR [Member]        
Debt Instrument [Line Items]        
Variable interest rate       2.75%
Maximum [Member] | Senior Secured Credit Facility Over Advance [Member]        
Debt Instrument [Line Items]        
Credit facility credit limit       $ 30,000,000