Annual report pursuant to Section 13 and 15(d)

Income taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details)

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Income taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Current:    
US Federal
US State
Foreign
Total current benefit
Deferred:    
US Federal 117
US State 26
Foreign
Total deferred benefit 143
Total benefit for income taxes $ 143