Income Taxes - Federal Statutory Rate to Pre-Tax Income from Continuing Operations (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Tax (benefit) expense at statutory rate of 34%	$ (812,303)	$ (762,292)	$ 1,829,945	$ 1,975,507
State income tax (benefit), net of Federal tax benefit (expense)	(63,298)	(75,456)	221,136	195,546
Amortization of deferred investment tax credits	(5,265)	(5,265)	(10,530)	(10,530)
Adjustment to tax return filed	0	0	0	40,914
Other	(9,067)	29,601	(12,837)	19,006
Total income tax (benefit) expense	(889,933)	(813,412)	2,027,714	2,220,443
Less: income tax from discontinued operations	122,500	36,431	373,474	310,808
Income tax (benefit) expense from continuing operations	$ (1,012,433)	$ (849,843)	$ 1,654,240	$ 1,909,635