Fair Value Measurements (Assets And Liabilities Measure At Fair Value On A Recurring Basis By Level) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 8,970,282	$ 11,995,481
Total Assets at Fair Value	8,970,282	11,995,481
Total Liabilities at Fair Value	6,720,765	5,644,626
Warrants Issued December 29, 2008 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of warrants issued	597	16,863
Warrants Issued May 10, 2012 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of warrants issued	2,316,594	1,915,753
Warrants Issued August 2013 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of warrants issued	4,403,574	3,712,010
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	8,970,282	11,995,481
Total Assets at Fair Value	8,970,282	11,995,481
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents
Total Assets at Fair Value
Total Liabilities at Fair Value
Fair Value, Inputs, Level 2 [Member] | Warrants Issued December 29, 2008 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of warrants issued
Fair Value, Inputs, Level 2 [Member] | Warrants Issued May 10, 2012 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of warrants issued
Fair Value, Inputs, Level 2 [Member] | Warrants Issued August 2013 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of warrants issued
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities at Fair Value	6,720,765	5,644,626
Fair Value, Inputs, Level 3 [Member] | Warrants Issued December 29, 2008 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of warrants issued	597	16,863
Fair Value, Inputs, Level 3 [Member] | Warrants Issued May 10, 2012 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of warrants issued	2,316,594	1,915,753
Fair Value, Inputs, Level 3 [Member] | Warrants Issued August 2013 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of warrants issued	$ 4,403,574	$ 3,712,010