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Fair Value Measurements (Details) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Liabilities    
Non-current portion of derivative instruments related to stock purchase warrants $ 0 $ 491,791
Total derivative instruments related to stock purchase warrants 468,304  
Fair Value, Measurements, Recurring [Member]    
Assets    
Investment in money market funds [1] 6,434,907 6,430,561
Total investment in money market funds 6,434,907 6,430,561
Liabilities    
Current portion of derivative instruments related to stock purchase warrants 468,304 16,411
Non-current portion of derivative instruments related to stock purchase warrants 0 491,791
Total derivative instruments related to stock purchase warrants 468,304 508,202
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets    
Investment in money market funds [1] 6,434,907 6,430,561
Total investment in money market funds 6,434,907 6,430,561
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 468,304 16,411
Non-current portion of derivative instruments related to stock purchase warrants 0 491,791
Total derivative instruments related to stock purchase warrants $ 468,304 $ 508,202
[1] Included in cash and cash equivalents on the accompanying condensed consolidated balance sheets.