Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Basis of presentation, principles of consolidation and significant accounting policies - Antidilutive Shares (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Accumulated deficit $ 30,397   $ 26,356
Anti-dilutive securities (in shares) 9,546,015 4,516,524  
Warrant      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Anti-dilutive securities (in shares) 6,777,015 2,941,524  
Employee Stock Option      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Anti-dilutive securities (in shares) 2,769,000 1,575,000