Annual report pursuant to Section 13 and 15(d)

Notes, warrants and other obligations (Details)

v3.19.1
Notes, warrants and other obligations (Details)
1 Months Ended 9 Months Ended 12 Months Ended
Aug. 23, 2018
USD ($)
Mar. 28, 2018
CAD ($)
Mar. 31, 2017
USD ($)
$ / shares
shares
Sep. 30, 2017
USD ($)
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2018
CAD ($)
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
Mar. 28, 2018
$ / shares
Debt Instrument [Line Items]                  
Notes Payable         $ 0   $ 135,574    
Fixed interest rate         4.50%        
Interest expense         $ 122,973   $ 4,806,637    
Third party [Member] | Convertible Note [Member] | Canada, Dollars [Member]                  
Debt Instrument [Line Items]                  
Proceeds from convertible debt held in escrow   $ 2,200,000              
Private Placement [Member]                  
Debt Instrument [Line Items]                  
Maturity date               Mar. 30, 2020  
Private Placement [Member] | Promissory Note [Member]                  
Debt Instrument [Line Items]                  
Notes Payable $ 1,696,000                
Fixed interest rate         5.00%        
Conversion price | $ / shares                 $ 0.10
Proceeds from convertible debt held in escrow         $ 775,555        
Cash released $ 921,000                
Private Placement [Member] | Promissory Note [Member] | Canada, Dollars [Member]                  
Debt Instrument [Line Items]                  
Proceeds from convertible debt held in escrow           $ 1,000,000      
Private Placement [Member] | Warrant [Member]                  
Debt Instrument [Line Items]                  
Warrants to purchase common stock | shares         1,900,000   1,900,000    
Exercise price | $ / shares         $ 3.56   $ 3.56    
Maturity date         Mar. 15, 2020 Mar. 15, 2020      
Expected price volatility     114.00%   108.00% 108.00% 108.00%    
Dividend yield     0.00%   0.00% 0.00% 0.00%    
Risk-free interest rate     1.66%   1.47% 1.47% 1.47%    
Expected term     3 years   3 years 3 years 3 years    
Fair value computed for warrants         $ 2,325,151        
Conversion feature         $ 2,424,849        
2% Convertible Preferred Stock Series A [Member]                  
Debt Instrument [Line Items]                  
Fixed interest rate     2.00%            
Conversion price | $ / shares     $ 2.50            
Interest expense     $ 48,671            
Warrants to purchase common stock | shares     19,194.72            
Principal amount     $ 4,750,000            
Accrued interest     48,671            
Fair value computed for warrants     $ 4,798,671            
Common Stock [Member]                  
Debt Instrument [Line Items]                  
Conversion price | $ / shares     $ 250.00            
Warrants to purchase common stock | shares     1,919,472            
Series A Preferred Stock [Member]                  
Debt Instrument [Line Items]                  
Interest expense       $ 4,750,000