Annual report pursuant to Section 13 and 15(d)

Fair Value Measurement (Narrative) (Details)

v3.19.2
Fair Value Measurement (Narrative) (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Level 3 Financial Liabilities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Combined derivative and warrant liability $ 2,256,631 $ 7,793,732