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DERIVATIVE WARRANT LIABILITY FROM FINANCING AND CONVERTIBLE NOTE - Carrying Amounts (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2017
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Carrying amounts of derivative financial liability and convertible notes                                
Fair value     $ 89,470,273       $ 190,303       $ 36,829,030 $ 190,303 $ 190,303 $ 190,303 $ 36,829,030  
Add: Deferred loss     (45,132,259)                          
Amortization of deferred loss     2,499,668                       46,894,189 $ 3,351,987
Fair value adjustment on exercised warrants     (511,122)                          
Fair value adjustment   $ (17,505) (8,389,224)         $ (11,733,761)                
Balance, Derivative financial liability     36,829,030         190,303             190,303 36,829,030
Series A Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Cancellation of Warrants                           (101,750)    
Series B Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Add: Deferred loss                           $ (16,931) $ (1,004,195)  
Exercise of Warrants                   $ (26,434,969) (6,554,029)          
Number of warrants exercised                           822,192 9,451,780  
Series C Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Add: Deferred loss                           $ (5,638)    
Exercise of Warrants               (253,887)   (4,205,362)            
Number of warrants exercised                           822,192 9,451,780  
Series D Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Exercise of Warrants     (1,108,306)               (1,004,185)          
Number of warrants exercised                             1,698,841  
Series F Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Add: Deferred loss                             $ (29,085,125)  
Exercise of Warrants                   (2,532,855) (26,552,270)          
Number of warrants exercised                             22,431,506  
Series A Units                                
Carrying amounts of derivative financial liability and convertible notes                                
Fair value     13,139,650       35,693       4,932,785 35,693 35,693 $ 35,693 $ 4,932,785  
Add: Deferred loss     (7,054,787)                          
Amortization of deferred loss     390,379                       6,664,408  
Fair value adjustment   (5,575) (1,542,457)         1,190,630                
Balance, Derivative financial liability     4,932,785         35,693             35,693 4,932,785
Series A Units | Series A Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Number of warrants cancelled                           35,950,340    
Cancellation of Warrants                           $ (24,480)    
Series A Units | Series B Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Exercise of Warrants                   (11,614,224) (303,919)          
Series A Units | Series C Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Exercise of Warrants                   (833,987)            
Series B Units                                
Carrying amounts of derivative financial liability and convertible notes                                
Fair value     67,810,835       82,523       28,938,849 82,523 82,523 82,523 28,938,849  
Add: Deferred loss     (36,408,201)                          
Amortization of deferred loss     2,067,557                       34,340,644  
Fair value adjustment on exercised warrants     (511,122)                          
Fair value adjustment   (5,253) (2,911,914)         (8,411,543)                
Balance, Derivative financial liability     28,938,849         82,523             82,523 28,938,849
Series B Units | Series A Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Cancellation of Warrants                           (77,270)    
Series B Units | Series B Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Exercise of Warrants                   (14,820,745) (6,250,110)          
Series B Units | Series C Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Exercise of Warrants               (253,887)   (3,371,375)            
Series B Units | Series D Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Exercise of Warrants     (1,108,306)               (1,004,185)          
Series B Units | Series F Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Exercise of Warrants                   $ (2,532,855) (26,552,270)          
Series E Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Fair value     8,519,788       72,087       $ 2,957,396 72,087 72,087 $ 72,087 2,957,396  
Add: Deferred loss     (1,669,271)                          
Amortization of deferred loss     41,732                       1,627,539  
Fair value adjustment   (6,677) (3,934,853)         (4,512,848)                
Balance, Derivative financial liability     2,957,396         $ 72,087             72,087 2,957,396
Series E Warrants | Series E Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Number of warrants cancelled                           22,431,506    
Cancellation of Warrants                           $ (65,410)    
Series D Warrants | Series D Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Number of warrants exercised                     1,698,841          
Series B Warrants | Series B Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Number of warrants exercised                   14,505,580 11,170,788          
Series F Warrants | Series F Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Number of warrants exercised                   1,389,846 21,041,660          
Series C Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Exercise of Warrants   (5,638)                            
Series C Warrants | Series C Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Exercise of Warrants                           822,192    
Number of warrants exercised               8,951,780   500,000            
Warrants                                
Carrying amounts of derivative financial liability and convertible notes                                
Amortization of deferred loss                             42,632,591  
2017 Convertible Notes                                
Carrying amounts of derivative financial liability and convertible notes                                
Fair value     26,100,900 $ 8,072,974 $ 8,963,523 $ 11,253,670 14,617,336       $ 20,007,559 14,617,336 14,617,336 14,617,336 20,007,559  
Add: Deferred loss     (5,113,917)                          
Amortization of deferred loss     852,319                       4,261,598  
Exercise of Warrants       (4,086,368) (497,430) (4,323,427) (4,188,713) $ (13,872,312) $ (1,536,596) $ (5,146,924)            
Fair value adjustment     (1,831,743) 1,413,583 (393,119) 2,033,280 825,047 10,904,011                
Balance, Derivative financial liability $ 8,963,523 $ 11,253,670 20,007,559 5,400,189 8,072,974 8,963,523 $ 11,253,670 $ 14,617,336       $ 8,963,523 $ 8,072,974 $ 5,400,189 14,617,336 20,007,559
Number of warrants exercised             4,285,000 10,300,000 1,772,500 5,567,500   3,536,000 415,000 2,961,000    
Derivative financial liability and convertible note                                
Convertible Notes (current)     4,261,597 5,400,189       $ 1,423,224           $ 5,400,189 1,423,224 4,261,597
Convertible Notes (non-current)     $ 15,745,962         $ 13,194,112             $ 13,194,112 $ 15,745,962
2019 Convertible Notes                                
Carrying amounts of derivative financial liability and convertible notes                                
Fair value 9,775,000     9,055,688 9,042,369                      
Fair value adjustment (732,631)     209,792 13,319                      
Balance, Derivative financial liability $ 9,042,369     9,265,480 $ 9,055,688 $ 9,042,369           $ 9,042,369 $ 9,055,688 9,265,480    
Derivative financial liability and convertible note                                
Convertible Notes (current)       1,090,561                   1,090,561    
Convertible Notes (non-current)       $ 8,174,919                   $ 8,174,919