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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) (71,755) $ 0 0 0 (71,755) 0
Change in unrealized gain or loss on investments (55) 0 0 (55) 0 0
Foreign currency translation adjustments (70) 0 0 (70) 0 0
Shares issued from stock plans, net of payroll taxes paid 1,320 $ 7 1,313 0 0 0
Shares issued from stock plans, net of payroll taxes paid, Shares   639,766        
Stock-based compensation 19,384 $ 0 19,384 0   0
Balance at Mar. 31, 2021 390,273 $ 921 1,420,471 (4,624) (1,045,766) 19,271
Balance, Shares at Mar. 31, 2021   92,080,399        
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) (63,205) $ 0 0 0 (63,205) 0
Change in unrealized gain or loss on investments (2,591) 0 0 (2,591) 0 0
Foreign currency translation adjustments 249 0 0 249 0 0
Shares issued from stock plans, net of payroll taxes paid (2,703) $ 4 (2,707) 0 0 0
Shares issued from stock plans, net of payroll taxes paid, Shares   408,051        
Stock-based compensation 17,152 $ 0 17,152 0 0 0
Balance at Mar. 31, 2022 $ 178,015 $ 933 $ 1,490,859 $ (6,505) $ (1,327,239) $ 19,967
Balance, Shares at Mar. 31, 2022   93,288,584