Schedule III - Real Estate and Accumulated Depreciation (Detail) - Aggregate Cost for Federal Income Tax Purposes (USD $)	Jan. 31, 2013	Jan. 31, 2012
Real Estate, Federal Income Tax Basis	$ 20,720,166	$ 21,271,256
Land [Member]
Real Estate, Federal Income Tax Basis	1,856,788	1,856,788
Building and Building Improvements [Member]
Real Estate, Federal Income Tax Basis	$ 18,863,378	$ 19,414,468