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Note 17 - Fair Value of Financial Instruments (Detail) - Estimated Fair Values of Debt Instruments (USD $)
Jan. 31, 2013
Jan. 31, 2012
Mortgage notes payable $ 19,954,924 $ 21,271,256
Mortgage notes payable 18,390,891 20,593,950
Notes payable to banks 450,000  
Notes payable to banks 450,000  
Other notes payable 352,256 550,652
Other notes payable $ 354,308 $ 542,824