Quarterly report pursuant to Section 13 or 15(d)

Income taxes (Details)

v3.20.2
Income taxes (Details) - USD ($)
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Income Tax Disclosure [Abstract]    
Current income tax expense $ 0 $ 0
Deferred income tax expense $ 0 $ 0
Effective tax rate 0.00%  
Accrued interest and penalties related to uncertain tax positions $ 0