Quarterly report pursuant to Section 13 or 15(d)

Basis of presentation, principles of consolidation and significant accounting policies - Anti-dilutive Shares (Details)

v3.19.2
Basis of presentation, principles of consolidation and significant accounting policies - Anti-dilutive Shares (Details) - shares
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Anti-dilutive securities (in shares) 13,427,998 6,538,515
Warrant    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Anti-dilutive securities (in shares) 2,814,000 3,784,515
Employee Stock Option    
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Anti-dilutive securities (in shares) 10,613,998 2,754,000