Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details)

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Fair Value Measurements (Details) - Recurring basis - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets $ 471,183 $ 4,758,539
Level 3 | Contingent consideration    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Liabilities 2,576,633  
Level 3 | Warrant liability    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Liabilities 8,185 5,501
Level 3 | Unit purchase option liability    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Liabilities $ 26,991 $ 51