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Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Deficit [Member]
Noncontrolling Interests [Member]
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 income (loss) (155,945) $ 0 0 0 (155,945) 0
Change in unrealized gain or loss on investments (25) 0 0 (25) 0 0
Foreign currency translation adjustments 366 0 0 366 0 0
Shares issued from stock plans, net of payroll taxes paid 5,129 $ 13 5,116 0 0 0
Shares issued from stock plans, net of payroll taxes paid, Shares   1,267,319        
Stock-based compensation 54,089 $ 0 54,089 0 0 0
Balance at Sep. 30, 2021 345,063 $ 927 1,458,979 (4,158) (1,129,956) 19,271
Balance, Shares at Sep. 30, 2021   92,707,952        
Balance at Jun. 30, 2021 279,851 $ 926 1,443,975 (4,567) (1,179,754) 19,271
Balance, Shares at Jun. 30, 2021   92,608,929        
Net income (loss) 49,798 $ 0 0 0 49,798 0
Change in unrealized gain or loss on investments 13 13
Foreign currency translation adjustments 396 0 0 396 0 0
Shares issued from stock plans, net of payroll taxes paid (699) $ 1 (700) 0 0 0
Shares issued from stock plans, net of payroll taxes paid, Shares   99,023        
Stock-based compensation 15,704 $ 0 15,704 0 0 0
Balance at Sep. 30, 2021 345,063 $ 927 1,458,979 (4,158) (1,129,956) 19,271
Balance, Shares at Sep. 30, 2021   92,707,952        
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        
Net income (loss) (227,479) $ 0 0 0 (227,479) 0
Change in unrealized gain or loss on investments (3,155) 0 0 (3,155) 0 0
Foreign currency translation adjustments (28) 0 0 (28) 0 0
Shares issued from stock plans, net of payroll taxes paid (1,573) $ 10 (1,583) 0 0 0
Shares issued from stock plans, net of payroll taxes paid, Shares   1,055,807        
Stock-based compensation 49,395 $ 0 49,395 0 0 0
Balance at Sep. 30, 2022 46,273 $ 939 1,524,226 (7,346) (1,491,513) 19,967
Balance, Shares at Sep. 30, 2022   93,936,340        
Balance at Jun. 30, 2022 123,747 $ 937 1,509,636 (6,930) (1,399,863) 19,967
Balance, Shares at Jun. 30, 2022   93,733,034        
Net income (loss) (91,650) (91,650)
Change in unrealized gain or loss on investments 20 0 0 20 0 0
Foreign currency translation adjustments (436) 0 0 (436) 0 0
Shares issued from stock plans, net of payroll taxes paid (993) $ 2 (995) 0 0 0
Shares issued from stock plans, net of payroll taxes paid, Shares   203,306        
Stock-based compensation 15,585 $ 0 15,585 0 0 0
Balance at Sep. 30, 2022 $ 46,273 $ 939 $ 1,524,226 $ (7,346) $ (1,491,513) $ 19,967
Balance, Shares at Sep. 30, 2022   93,936,340