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Provision for income tax expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
  Continuing operations $ 1,516 $ 1,530 $ 10,281
Comprehensive income 551 (515) (209)
Total tax expense $ 2,067 $ 1,015 $ 10,072