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Note 6 - Debt (Details Textual) - USD ($)
6 Months Ended
May 30, 2012
Jul. 31, 2017
2012 Mortgage [Member] | Quad Ortega Hill LLC [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument, Basis Spread on Variable Rate   1.23%
2012 Mortgage [Member] | Rabobank N.A [Member] | Quad Ortega Hill LLC [Member]    
Debt Instrument, Face Amount $ 16,100,000  
Debt Instrument, Periodic Payment 88,100  
Final Principal Payment 11,700,000  
2012 Mortgage [Member] | Rabobank N.A [Member] | Quad Ortega Hill LLC [Member] | Swap [Member]    
Derivative Liability, Notional Amount $ 16,100,000  
Derivative, Fixed Interest Rate 4.31%  
2012 Mortgage [Member] | Rabobank N.A [Member] | Quad Ortega Hill LLC [Member] | London Interbank Offered Rate (LIBOR) [Member]    
Debt Instrument, Basis Spread on Variable Rate 2.25%  
Unsecured Credit Agreement [Member] | Rabobank N.A [Member]    
Loans Payable to Bank   $ 14,000,000