Organization and Significant Accounting Policies - Summary of Unaudited Reconciliation of Net Income (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Regulatory Assets [Abstract]
Net income, per statements of income	$ 903,463	$ 1,041,105	$ 862,195
Book to tax depreciation difference	(56,003)	(31,709)	(24,201)
Tax over (under) Book gain from asset disposition	(32,548)	352,979	(230,437)
Straight line rent adjustment	2,250	(279)	(204)
Penalties	0	0	242
Prepaid rent	(21,947)	0	0
Bad Debts	25,483	0	0
Other expense/deduction items with differences	(3,836)	0	0
Impairment (write-down)/write-up of assets held	0	0	(142,747)
Net income for tax reporting purposes	$ 816,862	$ 1,362,096	$ 464,848