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Condensed Consolidated Statements of Changes in Stockholders' Equity (Deficit) (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, 2021 $ 229,113 $ 929 $ 1,476,414 $ (4,163) $ (1,264,034) $ 19,967
Balance, Shares at Dec. 31, 2021   92,880,533        
Net 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        
Balance at Dec. 31, 2022 (1,480) $ 942 1,541,019 (5,720) (1,557,688) 19,967
Balance, Shares at Dec. 31, 2022   94,166,086        
Net loss (76,705) $ 0 0 0 (76,705) 0
Change in unrealized gain or loss on investments 1,398 0 0 1,398 0 0
Foreign currency translation adjustments (248) 0 0 (248) 0 0
Issuance of common stock under ATM Program 31,131 $ 15 31,116 0 0 0
Issuance of common stock under ATM Program shares   1,541,579        
Shares issued from stock plans, net of payroll taxes paid 907 $ 9 898 0 0 0
Shares issued from stock plans, net of payroll taxes paid, Shares   915,644        
Stock-based compensation 16,112 $ 0 16,112 0 0 0
Balance at Mar. 31, 2023 $ (28,885) $ 966 $ 1,589,145 $ (4,570) $ (1,634,393) $ 19,967
Balance, Shares at Mar. 31, 2023   96,623,309