Schedule III - Investment Properties and Accumulated Depreciation (Parenthetical) (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2011
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Estimated fair value		$ 293,000	$ 150,000	$ 445,000
Cost of Land	7,984,817	7,984,817	7,984,817
Vacant-Phoenix AZ [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Estimated fair value			150,000
Land [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Cost of Land	$ 33,991