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Liquidity, Going Concern and Management Plans (Details Narrative) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Feb. 02, 2021
Oct. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Cash and cash equivalents     $ 134,942 $ 7,624
Working capital deficit     70,600  
Accumulated deficit     (626,456) (56,123)
Net loss     (599,392) (38,127)
Proceeds from issuance of common stock, net of offering expenses   $ 181,000    
Proceeds from convertible debt     $ 3,003 $ 847
Subsequent Event [Member] | 2026 Notes [Member]        
Proceeds from convertible debt $ 402,500      
Proceeds from convertible debt net $ 391,400      
Debt interest rate 3.25%      
Debt instrument, maturity date Feb. 15, 2026      
Debt instrument, maturity date, description Semiannually in arrears on February 15 and August 15 of each year, beginning on August 15, 2021. The convertible notes will mature on February 15, 2026, unless earlier converted, redeemed or repurchased.