Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Subsequent events - Disclosure Of Shares Sold Pursuant To Share Purchase Agreement (Details)

v3.20.1
Subsequent events - Disclosure Of Shares Sold Pursuant To Share Purchase Agreement (Details) - Aspire Capital Fund LLC [Member] - Aspire Agreement [Member] - USD ($)
 12 Months Ended
Feb. 13, 2020
Feb. 06, 2020
Jan. 23, 2020
Jan. 18, 2020
Jan. 17, 2020
Jan. 10, 2020
Jan. 08, 2020
Jan. 06, 2020
Jan. 03, 2020
Dec. 23, 2019
Dec. 31, 2019
Disclosure Of Shares Sold Pursuant To Share Purchase Agreement [Line Items]                      
Issue of equity                   $ 423,440 $ 5,304,531
Events After Reporting Period [member]                      
Disclosure Of Shares Sold Pursuant To Share Purchase Agreement [Line Items]                      
Common stock shares issued       4,408,048              
Issue of equity       $ 2,071,930              
January 3, 2020 [Member] | Events After Reporting Period [member]                      
Disclosure Of Shares Sold Pursuant To Share Purchase Agreement [Line Items]                      
Common stock shares issued                 500,000    
Issue of equity                 $ 219,600    
January 6, 2020 [Member] | Events After Reporting Period [member]                      
Disclosure Of Shares Sold Pursuant To Share Purchase Agreement [Line Items]                      
Common stock shares issued               500,000      
Issue of equity               $ 229,300      
January 8, 2020 [Member] | Events After Reporting Period [member]                      
Disclosure Of Shares Sold Pursuant To Share Purchase Agreement [Line Items]                      
Common stock shares issued             400,000        
Issue of equity             $ 195,160        
January 10, 2020 [Member] | Events After Reporting Period [member]                      
Disclosure Of Shares Sold Pursuant To Share Purchase Agreement [Line Items]                      
Common stock shares issued           500,000          
Issue of equity           $ 247,550          
January 17, 2020 [Member] | Events After Reporting Period [member]                      
Disclosure Of Shares Sold Pursuant To Share Purchase Agreement [Line Items]                      
Common stock shares issued         600,000            
Issue of equity         $ 303,000            
January 23, 2020 [Member] | Events After Reporting Period [member]                      
Disclosure Of Shares Sold Pursuant To Share Purchase Agreement [Line Items]                      
Common stock shares issued     600,000                
Issue of equity     $ 295,320                
February 6, 2020 [Member] | Events After Reporting Period [member]                      
Disclosure Of Shares Sold Pursuant To Share Purchase Agreement [Line Items]                      
Common stock shares issued   600,000                  
Issue of equity   $ 282,000                  
February 13, 2020 [Member] | Events After Reporting Period [member]                      
Disclosure Of Shares Sold Pursuant To Share Purchase Agreement [Line Items]                      
Common stock shares issued 708,048                    
Issue of equity $ 300,000