XML 41 R31.htm IDEA: XBRL DOCUMENT v3.21.1
Liquidity, Going Concern and Management Plans (Details Narrative) - USD ($)
$ in Thousands
 3 Months Ended
Feb. 02, 2021
Feb. 02, 2021
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Cash and cash equivalents     $ 459,532   $ 134,942
Working capital deficit     278,900    
Accumulated deficit     (696,566)   $ (626,456)
Net loss     (70,186) $ (56,343)  
Proceeds from convertible debt     389,946 $ 900  
Proceeds from issuance of common stock, net of offering expenses     $ 12,600    
2026 Convertible Notes [Member]          
Proceeds from convertible debt $ 402,500 $ 389,900      
Debt interest rate 3.25% 3.25% 3.25%    
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.        
Debt instrument, maturity date Feb. 15, 2026        
Net proceeds from offering, after deduction discount $ 389,900