Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Rollforward (Details)

v3.8.0.1
Fair Value Measurements - Rollforward (Details) - Level 3 - USD ($)
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Fair Value, Assets Measured on Recurring Basis [Roll Forward]    
Beginning balance $ 2,611,809 $ 5,552
Issuance of contingent consideration and royalty 8,115,909  
Change in fair value 286,020 3,761
Ending balance 11,013,738 9,313
Warrant liability    
Fair Value, Assets Measured on Recurring Basis [Roll Forward]    
Beginning balance   5,501
Change in fair value 7,405 (2,795)
Ending balance   2,706
Warrant liability | Recurring basis    
Fair Value, Assets Measured on Recurring Basis [Roll Forward]    
Beginning balance 8,185  
Ending balance 15,590  
Unit purchase option liability    
Fair Value, Assets Measured on Recurring Basis [Roll Forward]    
Beginning balance 26,991 51
Change in fair value 15,846 6,556
Ending balance 42,837 $ 6,607
Contingent consideration    
Fair Value, Assets Measured on Recurring Basis [Roll Forward]    
Beginning balance 2,576,633  
Issuance of contingent consideration and royalty 7,875,165  
Change in fair value 199,283  
Ending balance 10,651,081  
Royalty Obligation    
Fair Value, Assets Measured on Recurring Basis [Roll Forward]    
Beginning balance 0  
Issuance of contingent consideration and royalty 240,744  
Change in fair value 63,486  
Ending balance $ 304,230