Quarterly report pursuant to Section 13 or 15(d)

Warrants - Warrants issued as compensation (Details)

v3.21.1
Warrants - Warrants issued as compensation (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Nov. 30, 2020
USD ($)
$ / shares
shares
Jul. 20, 2020
USD ($)
director
$ / shares
shares
Jun. 24, 2020
director
$ / shares
shares
Mar. 17, 2020
$ / shares
shares
Dec. 19, 2019
$ / shares
shares
Nov. 04, 2019
$ / shares
shares
Sep. 17, 2019
$ / shares
shares
Sep. 30, 2020
$ / shares
shares
Jun. 30, 2020
$ / shares
shares
Mar. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
shares
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
$ / shares
shares
Jun. 01, 2020
shares
Class of Warrant or Right [Line Items]                            
Issued (in shares)       1,003,232 937,500 11,000   570,258 1,990,624 3,288,400     49,928,469  
Warrants exercised (in dollars per share) | $ / shares                   $ 0.76     $ 0.58  
Warrants exercised (in shares)                   1,839,275 1,687,690   1,937,690  
Warrants, exercise price (in dollars per share) | $ / shares       $ 1.62 $ 5.00 $ 5.00   $ 0.65 $ 0.75          
Term of warrants         24 months 24 months                
Share-based compensation | $                   $ 2,525   $ 2,485    
July 2020 Guarantor Warrants                            
Class of Warrant or Right [Line Items]                            
Issued (in shares)   300,000                        
Warrants, exercise price (in dollars per share) | $ / shares   $ 1.05                        
Term of warrants   84 months                        
Compensation Warrants                            
Class of Warrant or Right [Line Items]                            
Issued (in shares) 400,000 200,000 1,000,000                      
Shares issuable upon exercise of warrants (in shares)                           1,041,666
Warrants exercised (in shares)                   791,666        
Warrants, exercise price (in dollars per share) | $ / shares $ 1.00 $ 1.05 $ 1.25                      
Number of individuals received warrants | director   2 2                      
Term of warrants 72 months 84 months 84 months                      
Share-based compensation | $   $ 1,000                        
Exercise of warrants (in shares)                   736,689        
General and administrative expense | Compensation Warrants                            
Class of Warrant or Right [Line Items]                            
Total cost of contract termination | $                         $ 5,700  
General and administrative expense for warrants issued for services | $ $ 100                          
Warrant Exercise Period One | Compensation Warrants                            
Class of Warrant or Right [Line Items]                            
Period from issuance date after which warrants become exercisable             12 months              
Warrant Exercise Period One | Advisor | Exercise Price $0.10 | Compensation Warrants                            
Class of Warrant or Right [Line Items]                            
Issued (in shares)             2,500,000              
Warrants exercised (in dollars per share) | $ / shares             $ 0.10              
Warrants exercisable (in shares)             1,250,000              
Warrant Exercise Period One | Advisor | Exercise Price $10.00 | Compensation Warrants                            
Class of Warrant or Right [Line Items]                            
Issued (in shares)             1,500,000              
Warrants exercised (in dollars per share) | $ / shares             $ 10.00              
Warrant Exercise Period Two | Compensation Warrants                            
Class of Warrant or Right [Line Items]                            
Period from issuance date after which warrants become exercisable             18 months              
Warrant Exercise Period Two | Advisor | Exercise Price $0.10 | Compensation Warrants                            
Class of Warrant or Right [Line Items]                            
Warrants exercised (in dollars per share) | $ / shares             $ 0.10              
Warrants exercisable (in shares)             1,250,000              
Warrant Exercise Period Two | Advisor | Exercise Price $10.00 | Compensation Warrants                            
Class of Warrant or Right [Line Items]                            
Warrants exercised (in dollars per share) | $ / shares             $ 10.00              
Warrants exercisable (in shares)             1,500,000