Quarterly report pursuant to Section 13 or 15(d)

Basis of presentation, summary of significant accounting policies (Narrative) (Details)

v3.19.3
Basis of presentation, summary of significant accounting policies (Narrative) (Details) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
Jun. 27, 2019
Sep. 30, 2019
Jun. 30, 2019
Sep. 30, 2019
Jan. 28, 2019
Dec. 31, 2018
Conversion of notes into shares 1,813,500     1,813,500    
Fair value of notes       $ 10,225,959    
Expected operating liabilities to be recorded from adoption of FASB ASU 2016-02           $ 1,500,000
Senior Secured Promissory Notes [Member]            
Conversion of notes into shares     1,813,500      
Fair value of notes     $ 10,200,000      
Warrant issued         1,908,144  
Senior Secured Convertible Promissory Notes [Member]            
Conversion of notes into shares       1,813,500    
Fair value of notes   $ 3,900,000   $ 10,200,000    
Senior Secured Convertible Promissory Notes [Member] | Investors [Member]            
Debt instrument face amount         $ 3,358,333  
Warrant issued         1,908,144