Annual report pursuant to Section 13 and 15(d)

Income Taxes - Provision components and Reconciliation of income taxes (Details)

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Income Taxes - Provision components and Reconciliation of income taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Current Federal, State and Local, Tax Expense (Benefit) [Abstract]    
Provision for state income taxes $ 2  
Provision for income taxes 2  
Effective Income Tax Rate Reconciliation, Amount [Abstract]    
Tax at Cayman statutory rate (18,861)  
Foreign rate differential   $ (18,622)
State tax - net of federal benefit 2 (8,493)
Officer compensation 1,531 24
Cancellation of debt income 7,676  
Transaction costs 3,605  
Other permanent differences 16  
U.S. tax credits (1,369) (3,497)
Change in valuation allowance 7,402 $ 30,588
Provision for income taxes $ 2