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Condensed Consolidated Statement of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Preferred Shares
Common Shares
Treasury Stock
Additional Paid-in Capital
Accumulated Deficit
Balance at Dec. 31, 2019 $ 608,263 $ 21,850 $ 269,173 $ (35,900) $ 1,764,317 $ (1,411,177)
Balance (in shares) at Dec. 31, 2019   289,317,460 365,014,893      
Balance, Treasury Shares (in shares) at Dec. 31, 2019       (4,910,992)    
Exercise of stock options 1,306   $ 269   1,037  
Exercise of stock options (in shares)     412,465      
Vesting of restricted stock units (13,831)   $ 1,274 $ (13,831) (1,274)  
Vesting of restricted stock units (in shares)     1,951,448 (759,832)    
Stock-based compensation 10,591       10,591  
Income (Loss) for the period (20,553)         (20,553)
Balance at Mar. 31, 2020 585,776 $ 21,850 $ 270,716 $ (49,731) 1,774,671 (1,431,730)
Balance (in shares) at Mar. 31, 2020   289,317,460 367,378,806      
Balance, Treasury Shares (in shares) at Mar. 31, 2020       (5,670,824)    
Balance at Dec. 31, 2019 $ 608,263 $ 21,850 $ 269,173 $ (35,900) 1,764,317 (1,411,177)
Balance (in shares) at Dec. 31, 2019   289,317,460 365,014,893      
Balance, Treasury Shares (in shares) at Dec. 31, 2019       (4,910,992)    
Exercise of stock options (in shares) 642,756          
Income (Loss) for the period $ (22,926)          
Balance at Sep. 30, 2020 607,257 $ 5,434 $ 287,585 $ (50,728) 1,799,069 (1,434,103)
Balance (in shares) at Sep. 30, 2020   23,850,780 394,642,079      
Balance, Treasury Shares (in shares) at Sep. 30, 2020       (5,813,385)    
Balance at Dec. 31, 2019 608,263 $ 21,850 $ 269,173 $ (35,900) 1,764,317 (1,411,177)
Balance (in shares) at Dec. 31, 2019   289,317,460 365,014,893      
Balance, Treasury Shares (in shares) at Dec. 31, 2019       (4,910,992)    
Balance at Dec. 31, 2020 $ 627,505   $ 290,115 $ (51,082) 1,817,649 (1,429,177)
Balance (in shares) at Dec. 31, 2020     398,425,000      
Balance, Treasury Shares (in shares) at Dec. 31, 2020 5,886,919     (5,886,919)    
Balance at Mar. 31, 2020 $ 585,776 $ 21,850 $ 270,716 $ (49,731) 1,774,671 (1,431,730)
Balance (in shares) at Mar. 31, 2020   289,317,460 367,378,806      
Balance, Treasury Shares (in shares) at Mar. 31, 2020       (5,670,824)    
Issuance of common stock under employee stock purchase plan 848   $ 76   772  
Issuance of common stock under employee stock purchase plan (in shares)     123,608      
Conversion of Series A Convertible Preferred Stock, net (238) $ (14,684) $ 14,684   (238)  
Conversion of Series A Convertible Preferred Stock, net (in shares)   (237,713,680) 23,771,368      
Exercise of stock options 352   $ 92   260  
Exercise of stock options (in shares)     148,290      
Vesting of restricted stock units (521)   $ 104 $ (521) (104)  
Vesting of restricted stock units (in shares)     167,240 (70,971)    
Stock-based compensation 12,131       12,131  
Income (Loss) for the period 4,415         4,415
Balance at Jun. 30, 2020 602,763 $ 7,166 $ 285,672 $ (50,252) 1,787,492 (1,427,315)
Balance (in shares) at Jun. 30, 2020   51,603,780 391,589,312      
Balance, Treasury Shares (in shares) at Jun. 30, 2020       (5,741,795)    
Conversion of Series A Convertible Preferred Stock, net (28) $ (1,732) $ 1,732   (28)  
Conversion of Series A Convertible Preferred Stock, net (in shares)   (27,753,000) 2,775,300      
Exercise of stock options 203   $ 53   150  
Exercise of stock options (in shares)     82,001      
Vesting of restricted stock units (476)   $ 128 $ (476) (128)  
Vesting of restricted stock units (in shares)     195,466 (71,590)    
Stock-based compensation 11,583       11,583  
Income (Loss) for the period (6,788)         (6,788)
Balance at Sep. 30, 2020 607,257 $ 5,434 $ 287,585 $ (50,728) 1,799,069 (1,434,103)
Balance (in shares) at Sep. 30, 2020   23,850,780 394,642,079      
Balance, Treasury Shares (in shares) at Sep. 30, 2020       (5,813,385)    
Balance at Dec. 31, 2020 $ 627,505   $ 290,115 $ (51,082) 1,817,649 (1,429,177)
Balance (in shares) at Dec. 31, 2020     398,425,000      
Balance, Treasury Shares (in shares) at Dec. 31, 2020 5,886,919     (5,886,919)    
Exercise of stock options $ 2,059   $ 536   1,523  
Exercise of stock options (in shares)     783,320      
Vesting of restricted stock units (7,252)   $ 1,709 $ (7,252) (1,709)  
Vesting of restricted stock units (in shares)     2,447,405 (1,003,965)    
Stock-based compensation 13,925       13,925  
Income (Loss) for the period (1,626)         (1,626)
Balance at Mar. 31, 2021 634,611   $ 292,360 $ (58,334) 1,831,388 (1,430,803)
Balance (in shares) at Mar. 31, 2021     401,655,725      
Balance, Treasury Shares (in shares) at Mar. 31, 2021       (6,890,884)    
Balance at Dec. 31, 2020 $ 627,505   $ 290,115 $ (51,082) 1,817,649 (1,429,177)
Balance (in shares) at Dec. 31, 2020     398,425,000      
Balance, Treasury Shares (in shares) at Dec. 31, 2020 5,886,919     (5,886,919)    
Exercise of stock options (in shares) 994,921          
Income (Loss) for the period $ (6,969)          
Balance at Sep. 30, 2021 $ 642,495   $ 293,140 $ (59,602) 1,845,103 (1,436,146)
Balance (in shares) at Sep. 30, 2021     402,772,229      
Balance, Treasury Shares (in shares) at Sep. 30, 2021 7,158,823     (7,158,823)    
Balance at Mar. 31, 2021 $ 634,611   $ 292,360 $ (58,334) 1,831,388 (1,430,803)
Balance (in shares) at Mar. 31, 2021     401,655,725      
Balance, Treasury Shares (in shares) at Mar. 31, 2021       (6,890,884)    
Issuance of common stock under employee stock purchase plan 1,028   $ 161   867  
Issuance of common stock under employee stock purchase plan (in shares)     226,402      
Exercise of stock options 75   $ 19   56  
Exercise of stock options (in shares)     27,139      
Vesting of restricted stock units (677)   $ 242 $ (677) (242)  
Vesting of restricted stock units (in shares)     346,010 (142,204)    
Stock-based compensation 2,479       2,479  
Income (Loss) for the period 7,808         7,808
Balance at Jun. 30, 2021 645,324   $ 292,782 $ (59,011) 1,834,548 (1,422,995)
Balance (in shares) at Jun. 30, 2021     402,255,276      
Balance, Treasury Shares (in shares) at Jun. 30, 2021       (7,033,088)    
Exercise of stock options 481   $ 128   353  
Exercise of stock options (in shares)     184,462      
Vesting of restricted stock units (591)   $ 230 $ (591) (230)  
Vesting of restricted stock units (in shares)     332,491 (125,735)    
Stock-based compensation 10,432       10,432  
Income (Loss) for the period (13,151)         (13,151)
Balance at Sep. 30, 2021 $ 642,495   $ 293,140 $ (59,602) $ 1,845,103 $ (1,436,146)
Balance (in shares) at Sep. 30, 2021     402,772,229      
Balance, Treasury Shares (in shares) at Sep. 30, 2021 7,158,823     (7,158,823)