Employee Benefit Plans - Other Changes in Plan Assets and Benefit Obligations Recognized in Accumulated Other Comprehensive (Income) loss (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Pension Plan, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net (gain) loss	$ (224,130)	$ (269,831)
Amortization of prior service cost		755,465
Total recognized in other comprehensive (income)/loss	(224,130)	485,634
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive (Income)/loss	(92,260)	446,548
Other Postretirement Benefit Plan, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net (gain) loss	(194,649)	39,293
Amortization of net obligation at transition	(2,913)	(2,913)
Total recognized in other comprehensive (income)/loss	(197,562)	36,380
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive (Income)/loss	$ (137,297)	$ 98,194