Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Reconciliation of Earnout Liability Measured and Carried Fair Value on a Recurring Basis (Details)

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Fair Value Measurements - Summary of Reconciliation of Earnout Liability Measured and Carried Fair Value on a Recurring Basis (Details) - Fair Value Measurements Recurring - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Addition for acquisition $ 25,749 $ 25,749
Ending Balance $ 25,749 $ 25,749