Schedule I - Condensed Statement of Balance Sheets (Parent Company) (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Assets [Abstract]          
Cash and cash equivalents $ 404,507 $ 92,348 $ 112,494 $ 67,598 $ 75,403
Other assets 21,260 8,129   1,692  
Total assets 866,942 267,252   337,021  
Liabilities:          
Accounts payable and accrued expenses 18,320 30,671   19,826  
Accrued salaries and benefits 10,852 3,978   3,792  
Notes and securities payable, net of discounts and deferred issuance costs   424,752      
Warrants payable 62,039 97,782   17,672  
Total liabilities 278,007 432,698   377,811  
Convertible Preferred stock (Series Seed A, A-1, B, C, and D), $0.0001 par value; 155,387,025 shares authorized as of December 31, 2020 and 2019; 139,444,346 shares; after reverse capitalization, issued and outstanding as of December 31, 2020 and 2019; aggregate liquidation preference of $470,256 as of December 31, 2020 0 447,747   447,747  
Stockholders' equity          
Additional paid-in capital 1,662,873 411,872      
Accumulated deficit (1,077,399) (1,028,982)   (891,633)  
Total stockholders' equity (deficit) 588,935 (613,193) $ (508,941) (488,537) (502,574)
Total liabilities, convertible preferred stock and stockholders' equity $ 866,942 267,252   337,021  
Parent Company [Member]          
Assets [Abstract]          
Cash and cash equivalents   5,432   4,569 $ 36,033
Other assets   102   342  
Intercompany interest receivable   4,958   3,750  
Intercompany note receivable   40,000   40,000  
Investments in consolidated subsidiaries   77,212   158,159  
Total assets   127,704   206,820  
Liabilities:          
Accounts payable and accrued expenses   13,140   5,471  
Accrued salaries and benefits   229   0  
Intercompany payable   27,251   4,093  
Notes and securities payable, net of discounts and deferred issuance costs   107,674   76,758  
Derivative liabilities   44,810   138,561  
Warrants payable   97,782   17,672  
Total liabilities   290,886   242,555  
Convertible Preferred stock (Series Seed A, A-1, B, C, and D), $0.0001 par value; 155,387,025 shares authorized as of December 31, 2020 and 2019; 139,444,346 shares; after reverse capitalization, issued and outstanding as of December 31, 2020 and 2019; aggregate liquidation preference of $470,256 as of December 31, 2020   447,747   447,747  
Stockholders' equity          
Common Stock, Value   9   9  
Additional paid-in capital   411,843   403,041  
Accumulated deficit   (1,022,781)   (886,532)  
Total stockholders' equity (deficit)   (610,929)   (483,482)  
Total liabilities, convertible preferred stock and stockholders' equity   $ 127,704   $ 206,820