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Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment [Member]
Common Stock [Member]
Common Stock [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Loss [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Accumulated Deficit [Member]
Accumulated Deficit [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Noncontrolling Interests [Member]
Noncontrolling Interests [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at Dec. 31, 2018 $ 528,470   $ 854   $ 1,226,453   $ (2,281)   $ (715,827)   $ 19,271  
Balance (ASU 2016-02 [Member]) at Dec. 31, 2018   $ 8,688   $ 0   $ 0   $ 0   $ 8,688   $ 0
Balance (ASU 2018-02 [Member]) at Dec. 31, 2018   $ 0   $ 0   $ 0   $ 611   $ (611)   $ 0
Balance, Shares at Dec. 31, 2018     85,432,102                  
Net loss (76,970)   $ 0   0   0   (76,970)   0  
Change in unrealized gain or loss on investments 592   0   0   592   0   0  
Foreign currency translation adjustments 331   0   0   331   0   0  
Shares issued from stock plans, net of payroll taxes paid 7,962   $ 23   7,939   0   0   0  
Shares issued from stock plans, net of payroll taxes paid, Shares     2,220,957                  
Stock-based compensation 66,267   $ 0   66,267   0   0   0  
Warrants exercised 66   $ 0   66   0   0   0  
Warrants exercised, Shares     4,430                  
Balance at Dec. 31, 2019 535,406   $ 877   1,300,725   (747)   (784,720)   19,271  
Balance, Shares at Dec. 31, 2019     87,657,489                  
Net loss (189,291)   $ 0   0   0   (189,291)   0  
Change in unrealized gain or loss on investments (545)   0   0   (545)   0   0  
Foreign currency translation adjustments (3,207)   0   0   (3,207)   0   0  
Shares issued from stock plans, net of payroll taxes paid 26,366   $ 37   26,329   0   0   0  
Shares issued from stock plans, net of payroll taxes paid, Shares     3,783,144                  
Stock-based compensation 72,720   $ 0   72,720   0   0   0  
Balance at Dec. 31, 2020 441,449   $ 914   1,399,774   (4,499)   (974,011)   19,271  
Balance, Shares at Dec. 31, 2020     91,440,633                  
Net loss (290,023)   $ 0   0   0   (290,023)   0  
Change in unrealized gain or loss on investments (899)   0   0   (899)   0   0  
Foreign currency translation adjustments 1,235   0   0   1,235   0   0  
Shares issued from stock plans, net of payroll taxes paid 5,494   $ 15   5,479   0   0   0  
Shares issued from stock plans, net of payroll taxes paid, Shares     1,439,900                  
Stock-based compensation 71,161   $ 0   71,161   0   0   0  
Conversion of subsidiary's convertible note payable(Note 10) 696   0   0   0   0   696  
Balance at Dec. 31, 2021 $ 229,113   $ 929   $ 1,476,414   $ (4,163)   $ (1,264,034)   $ 19,967  
Balance, Shares at Dec. 31, 2021     92,880,533