Summary of Income from Discontinued Operations (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 538,556	$ 661,681	$ 1,830,369	$ 1,896,782
Expenses	(168,976)	(239,267)	(553,925)	(744,574)
Depreciation and amortization		(212,949)	(369,522)	(635,153)
Expense support		59,510		178,529
Operating income	369,580	268,975	906,922	695,584
Interest expense	(116,498)	(125,241)	(368,751)	(370,585)
Income from discontinued operations before income tax expense	253,082	143,734	538,171	324,999
Income tax expense	(20,781)	(9,747)	(371,943)	(16,685)
Income from discontinued operations	$ 232,301	$ 133,987	$ 166,228	$ 308,314