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Debt and Lines of Credit (Narrative) (Details) - USD ($)
9 Months Ended 12 Months Ended
Jul. 27, 2015
Nov. 01, 2015
Feb. 01, 2015
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Debt instrument, maturity date   Jul. 31, 2018  
Debt instrument, effective rate 1.40%    
Line of credit facility maximum borrowing capacity $ 40,000,000    
London interbank offered rate (LIBOR) | Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Debt instrument, percentage point added to reference rate 1.25%    
Mortgages Notes [Member]      
Debt Instrument [Line Items]      
Debt, original balance     $ 600,000
Debt instrument, maturity date     May 31, 2019
Required monthly principal payments     $ 5,300
Debt instrument stated percentage interest rate     4.00%
Line of Credit [Member]      
Debt Instrument [Line Items]      
Line of credit facility, description   The outstanding balance was paid in full and the agreement terminated in February 2015.  
Minimum [Member] | Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Debt covenants, EBITDA period   12 months  
SRV [Member] | Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Line of credit facility maximum borrowing capacity     $ 600,000
Outstanding borrowing     $ 600,000
SRV [Member] | London interbank offered rate (LIBOR) | Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Debt instrument, percentage point added to reference rate     1.50%
SRV [Member] | SRV Mortgage Note Due September 2017 [Member]      
Debt Instrument [Line Items]      
Debt, original balance   $ 800,000  
Debt instrument, maturity date   Sep. 30, 2017  
Required monthly principal payments   $ 3,300  
Debt instrument stated percentage interest rate   3.10%  
SRV [Member] | SRV Mortgage Note Due August 2016 [Member]      
Debt Instrument [Line Items]      
Debt, original balance   $ 500,000  
Debt instrument, maturity date   Aug. 31, 2016  
Required monthly principal payments   $ 3,400  
Debt instrument stated percentage interest rate   4.50%  
SRV [Member] | SRV Mortgage Note Due February 2015 [Member]      
Debt Instrument [Line Items]      
Debt, original balance   $ 400,000  
SE [Member] | Mortgages Notes [Member]      
Debt Instrument [Line Items]      
Debt, original balance   $ 3,800,000  
Debt instrument, maturity date   Mar. 31, 2017  
Required monthly principal payments   $ 11,900  
Debt instrument, effective rate   1.90%  
SE [Member] | Mortgages Notes [Member] | London interbank offered rate (LIBOR)      
Debt Instrument [Line Items]      
Debt instrument, percentage point added to reference rate   1.75%