Annual report pursuant to Section 13 and 15(d)

Income taxes (Details)

v3.20.1
Income taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Income taxes [Abstract]    
Current income tax expense $ 0 $ 0
Deferred income tax expense 0 0
Deferred tax assets $ 3,384 0
Deferred tax liabilities   $ 0
Federal statutory rate 21.00%