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Fair Value Measurements (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2019
Dec. 31, 2019
Jun. 30, 2019
Dec. 31, 2018
Assets        
Contingent consideration     $ 900  
Change in contingent consideration $ 0      
Contingent consideration        
Earnout     $ 2,000  
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)        
Assets        
Cash and cash equivalents   $ 120,286   $ 151,063
Recurring | Significant Other Observable Inputs (Level2)        
Liabilities        
Derivative liability       $ 2,829
Recurring | Significant Unobservable Inputs (Level 3)        
Assets        
Contingent consideration   938    
Recurring | Interest rate swap | Significant Other Observable Inputs (Level2)        
Liabilities        
Derivative liability   $ 6,443