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Fair Value Measurements (Schedule of Assets and Liabilities Measured at Fair Value) (Details) - USD ($)
Sep. 30, 2015
Dec. 31, 2014
Liabilities    
Current portion of derivative instruments related to stock purchase warrants $ 2,355 $ 178,509
Non-current portion of derivative instruments related to stock purchase warrants 227,898 629,170
Total derivative instruments related to stock purchase warrants 230,253 807,679
Recurring [Member]    
Assets    
Investment in money market funds [1] 6,430,038 6,429,104
Total investment in money market funds 6,430,038 6,429,104
Liabilities    
Current portion of derivative instruments related to stock purchase warrants 2,355 178,509
Non-current portion of derivative instruments related to stock purchase warrants 227,898 629,170
Total derivative instruments related to stock purchase warrants 230,253 807,679
Recurring [Member] | Level 1 [Member]    
Assets    
Investment in money market funds [1] 6,430,038 6,429,104
Total investment in money market funds $ 6,430,038 $ 6,429,104
Liabilities    
Current portion of derivative instruments related to stock purchase warrants
Non-current portion of derivative instruments related to stock purchase warrants
Total derivative instruments related to stock purchase warrants
Recurring [Member] | Level 2 [Member]    
Assets    
Investment in money market funds [1]
Total investment in money market funds
Liabilities    
Current portion of derivative instruments related to stock purchase warrants
Non-current portion of derivative instruments related to stock purchase warrants
Total derivative instruments related to stock purchase warrants
Recurring [Member] | Level 3 [Member]    
Assets    
Investment in money market funds [1]
Total investment in money market funds
Liabilities    
Current portion of derivative instruments related to stock purchase warrants $ 2,355 $ 178,509
Non-current portion of derivative instruments related to stock purchase warrants 227,898 629,170
Total derivative instruments related to stock purchase warrants $ 230,253 $ 807,679
[1] Included in cash and cash equivalents on the accompanying condensed consolidated balance sheets.