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Consolidated statements of comprehensive loss (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Statement of Comprehensive Income [Abstract]        
Other comprehensive income, tax $ 0 $ 0 $ 0 $ 0