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Fair Value Measurements (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Liabilities    
Non-current portion of derivative instruments related to stock purchase warrants $ 491,791 $ 629,170
Total derivative instruments related to stock purchase warrants 508,202  
Fair Value, Measurements, Recurring [Member]    
Assets    
Investment in money market funds [1] 6,430,561 6,429,104
Total investment in money market funds 6,430,561 6,429,104
Liabilities    
Current portion of derivative instruments related to stock purchase warrants 16,411 178,509
Non-current portion of derivative instruments related to stock purchase warrants 491,791 629,170
Total derivative instruments related to stock purchase warrants 508,202 807,679
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets    
Investment in money market funds [1] 6,430,561 6,429,104
Total investment in money market funds 6,430,561 6,429,104
Liabilities    
Current portion of derivative instruments related to stock purchase warrants 0 0
Non-current portion of derivative instruments related to stock purchase warrants 0 0
Total derivative instruments related to stock purchase warrants 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets    
Investment in money market funds [1] 0 0
Total investment in money market funds 0 0
Liabilities    
Current portion of derivative instruments related to stock purchase warrants 0 0
Non-current portion of derivative instruments related to stock purchase warrants 0 0
Total derivative instruments related to stock purchase warrants 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Assets    
Investment in money market funds [1] 0 0
Total investment in money market funds 0 0
Liabilities    
Current portion of derivative instruments related to stock purchase warrants 16,411 178,509
Non-current portion of derivative instruments related to stock purchase warrants 491,791 629,170
Total derivative instruments related to stock purchase warrants $ 508,202 $ 807,679
[1] Included in cash and cash equivalents on the accompanying consolidated balance sheets.