Derivative Financial Instruments - Components of (Expense) Income of Derivative Financial Instruments (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative Gain	$ 121,228	$ (5,594,152)	$ 3,463,453
Free Sanding Derivatives (warrants) [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative Gain	(50,300)	(338,500)	(910,231)
Free Standing Derivatives Warrants Liabilities [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative Gain	$ 171,528	$ (5,255,652)	$ 4,373,684