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Statement of Operations and Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income Statement [Abstract]        
Related party transaction, selling, general and administrative expenses $ 142 $ 0 $ 260 $ 0