Note 9 - Statements of Cash Flows, Supplemental Disclosures (Detail) (USD $)	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Interest Paid	$ 175,736	$ 207,626
Note Payable Due on February 22nd, 2015 [Member]
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed	15,500
Number of Limited Partnership Units Issued During Period (in Shares)	7,631
Debt Instrument, Periodic Payment	$ 479