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Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($)
$ in Thousands
Total
Series E preferred stock
Common shares
Preferred Stock
Preferred Stock
Series E preferred stock
Common Stock
Common Stock
Common shares
Additional Paid-in Capital
Additional Paid-in Capital
Series E preferred stock
Additional Paid-in Capital
Common shares
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Noncontrolling Interests
Beginning balance at Dec. 31, 2019 $ (37,358)     $ 0   $ 82   $ 584,862     $ (3,879) $ (618,303) $ (120)
Beginning Balance (shares) at Dec. 31, 2019       10,000   81,974,000              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Exercise of warrants (shares) 338,454                        
Ending balance at Mar. 31, 2020 $ 27,803     $ 0   $ 96   682,047     (17,359) (636,893) (88)
Ending Balance (shares) at Mar. 31, 2020       37,000   96,180,000              
Beginning balance at Dec. 31, 2019 (37,358)     $ 0   $ 82   584,862     (3,879) (618,303) (120)
Beginning Balance (shares) at Dec. 31, 2019       10,000   81,974,000              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Net income (loss) (93,002)                     (93,028) 26
Foreign currency translation adjustment (11,904)                   (11,904)    
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan 1,712         $ 1   1,711          
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (shares)           967,000              
Taxes withheld on net settled vesting of restricted stock units (281)             (281)          
Issuance of shares   $ 25,000             $ 25,000        
Issuance of shares (shares)         25,000                
Issuance of Series E preferred stock in lieu of interest   2,330             2,330        
Issuance of Series E preferred stock in lieu of interest (shares)         2,000                
Issuance of common shares in connection with conversion or exchange of notes     $ 66,087       $ 14     $ 66,073      
Issuance of common shares in connection with conversion or exchange of notes (shares)             13,739,000            
Repurchase of Series E preferred stock   (2,354)             (2,354)        
Repurchase of Series E preferred stock (shares)         (2,000)                
Exercise of warrants 1,861             1,861          
Exercise of warrants (shares)           338,000              
Share-based compensation 5,981             5,981          
Series E preferred stock dividends 0             1,227       (1,227)  
Ending balance at Jun. 30, 2020 (41,928)     $ 0   $ 97   686,410     (15,783) (712,558) (94)
Ending Balance (shares) at Jun. 30, 2020       35,000   97,018,000              
Beginning balance at Mar. 31, 2020 27,803     $ 0   $ 96   682,047     (17,359) (636,893) (88)
Beginning Balance (shares) at Mar. 31, 2020       37,000   96,180,000              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Net income (loss) (74,836)                     (74,830) (6)
Foreign currency translation adjustment 1,576                   1,576    
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan 1,663         $ 1   1,662          
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (shares)           838,000              
Taxes withheld on net settled vesting of restricted stock units (208)             (208)          
Repurchase of Series E preferred stock   $ (2,354)             $ (2,354)        
Repurchase of Series E preferred stock (shares)         (2,000)                
Share-based compensation 4,428             4,428          
Series E preferred stock dividends 0             835       (835)  
Ending balance at Jun. 30, 2020 (41,928)     $ 0   $ 97   686,410     (15,783) (712,558) (94)
Ending Balance (shares) at Jun. 30, 2020       35,000   97,018,000              
Beginning balance at Dec. 31, 2020 (27,899)     $ 0   $ 99   711,487     (6,972) (732,422) (91)
Beginning Balance (shares) at Dec. 31, 2020       35,000   99,399,000              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Net income (loss) (30,001)                     (30,215) 214
Foreign currency translation adjustment 693                   693    
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan 2,844         $ 2   2,842          
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (shares)           1,765,000              
Taxes withheld on net settled vesting of restricted stock units (825)             (825)          
Issuance of shares     29,369       $ 1     29,368      
Issuance of shares (shares)             1,516,000            
Issuance of common shares in connection with conversion or exchange of notes     5,383       $ 1     5,382      
Issuance of common shares in connection with conversion or exchange of notes (shares)             429,000            
Share-based compensation 11,405             11,405          
Net noncontrolling interest acquired 125                     240 (115)
Series E preferred stock dividends 0             1,753       (1,753)  
Ending balance at Jun. 30, 2021 (8,906)     $ 0   $ 103   761,412     (6,279) (764,150) 8
Ending Balance (shares) at Jun. 30, 2021       35,000   103,109,000              
Beginning balance at Mar. 31, 2021 (1,463)     $ 0   $ 103   757,352     (8,704) (750,221) 7
Beginning Balance (shares) at Mar. 31, 2021       35,000   102,773,000              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Net income (loss) (13,043)                     (13,043) 0
Foreign currency translation adjustment 2,425                   2,425    
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan 1,282         $ 0   1,282          
Exercise of stock options, vesting of restricted stock units and stock issued under employee stock purchase plan (shares)           336,000              
Taxes withheld on net settled vesting of restricted stock units (356)             (356)          
Issuance of shares     $ (59)             $ (59)      
Share-based compensation 2,307             2,307          
Net noncontrolling interest acquired 1                       1
Series E preferred stock dividends 0             886       (886)  
Ending balance at Jun. 30, 2021 $ (8,906)     $ 0   $ 103   $ 761,412     $ (6,279) $ (764,150) $ 8
Ending Balance (shares) at Jun. 30, 2021       35,000   103,109,000