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Fair Value Measurements - Schedule Aggregate Fair Values of Earn-out Liability - (Details) - Level 3 - Contingent Earn-out Consideration - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]        
Beginning balance $ 743 $ 757 $ 655 $ 950
Payments (393) (79) (77) (828)
Change in value 47 65 179 533
Ending balance $ 397 $ 743 $ 757 $ 655