Annual report pursuant to Section 13 and 15(d)

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

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Income taxes (Schedule of Components of Income Tax Benefit Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Current:      
US Federal
US State (254)
Foreign
Total current benefit (expense) (254)
Deferred:      
US Federal 117
US State 26
Foreign  
Total deferred benefit 143
Total benefit (expense) for income taxes $ (254) $ 143