Federal Income Taxes - Components of Provision (Benefit) for Income Taxes (Detail) (USD $)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current tax expense:
Federal	$ 811,632	$ 973,336	$ 335,214
State and local	13,610	20,128	18,617
Total current tax expense	825,242	993,464	353,831
Deferred tax (benefit) expense:
Federal	(64,374)	(264,378)	1,941
State and local	(6,029)	(8,649)	363
Total deferred tax (benefit) expense	(70,403)	(273,027)	2,304
Total provision for income taxes	$ 754,839	$ 720,437	$ 356,135

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.