Fair Value Measurements (Summary Of Changes In The Fair Value Of The Company's Level 3 Financial Asset And Liabilities) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014
Fair Value, Assets And Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Liabilities, Balance at beginning of period	$ 5,644,626
Liabilities, Settlements
Liabilities, Revaluation	1,076,139
Liabilities, Balance at end of period	6,720,765
Warrants Issued December 29, 2008 [Member]
Fair Value, Assets And Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Liabilities, Balance at beginning of period	16,863
Liabilities, Settlements
Liabilities, Revaluation	(16,266)
Liabilities, Balance at end of period	597
Warrants Issued May 10, 2012 [Member]
Fair Value, Assets And Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Liabilities, Balance at beginning of period	1,915,753
Liabilities, Settlements
Liabilities, Revaluation	400,841
Liabilities, Balance at end of period	2,316,594
Warrants Issued August 2013 [Member]
Fair Value, Assets And Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Liabilities, Balance at beginning of period	3,712,010
Liabilities, Settlements
Liabilities, Revaluation	691,564
Liabilities, Balance at end of period	$ 4,403,574