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Other Liabilities - Components of Other Current Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Other Liabilities Disclosure [Abstract]    
Sales tax payable $ 644 $ 551
Payroll and payroll related expenses 13,324 6,126
Other 3,548 3,027
Other current liabilities $ 17,516 $ 9,704