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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Loss
Adoption of ASU
Accumulated Other Comprehensive Loss
Accumulated Deficit
Adoption of ASU
Accumulated Deficit
Adoption of ASU
Total
Balances (ASU 2016-01) at Dec. 31, 2017     $ (2,753)   $ 2,753      
Balances at Dec. 31, 2017 $ 211 $ 3,627,433   $ (7,010)   $ (1,990,005)   $ 1,630,629
Increase (Decrease) in Stockholders' Equity                
Issuance of shares of Common Stock upon exercise of stock options and settlement of employee restricted stock units and shares of Common Stock under the ESPP 2 29,940           29,942
Issuance of shares of Common Stock for services rendered   344           344
Issuance of shares of Common Stock upon conversion of Convertible Senior Notes   7,695           7,695
Stock compensation   148,266           148,266
Other comprehensive income (loss)       (402)       (402)
Net income (loss)           109,493   109,493
Balances (ASU 2016-02) at Dec. 31, 2018         $ 95   $ 95  
Balances at Dec. 31, 2018 213 3,813,678   (10,165)   (1,877,759)   1,925,967
Increase (Decrease) in Stockholders' Equity                
Issuance of shares of Common Stock upon exercise of stock options and settlement of employee restricted stock units and shares of Common Stock under the ESPP 3 63,296           63,299
Issuance of shares of Common Stock for services rendered   487           487
Stock compensation   167,029           167,029
Other comprehensive income (loss)       (5,377)       (5,377)
Net income (loss)           446,906   446,906
Balances at Dec. 31, 2019 216 4,044,490   (15,542)   (1,430,758)   2,598,406
Increase (Decrease) in Stockholders' Equity                
Issuance of shares of Common Stock upon exercise of stock options and settlement of employee restricted stock units and shares of Common Stock under the ESPP 3 110,302           110,305
Issuance of shares of Common Stock for services rendered   546           546
Issuance of shares of Common Stock upon conversion of Convertible Senior Notes   18,999           18,999
Stock compensation   178,527           178,527
Other comprehensive income (loss)       182       182
Net income (loss)           (295,697)   (295,697)
Balances at Dec. 31, 2020 $ 219 $ 4,352,864   $ (15,360)   $ (1,726,455)   $ 2,611,268