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Note 4 - Related Party Transactions (Detail) (USD $)
 3 Months Ended 9 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Oct. 31, 2012
Oct. 31, 2011
Number of Units Purchased from Rare Earth Financial 31.5      
Purchase Price Per Unit from Rare Earth Financial (in Dollars per share) $ 10,000      
Number of Class B Limited Partnership Units Held by Related Party (in Shares) 3,407,938   3,407,938  
Number of Shares of Beneficial Interest Held by Related Party (in Shares) 5,573,624   5,573,624  
  $ 531,503 $ 0 $ 1,647,584
Subsequent Event [Member]
        
Notes Receivable, Related Parties 135,000   135,000  
Rare Earth [Member]
        
Related Party Transaction, Amounts of Transaction 315,000      
Related Party Transaction, Rate 7.00%      
Notes Receivable, Related Parties $ 307,006   $ 307,006