Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis (Details)

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Fair Value Measurements - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Transfers between Levels        
Transfer into Level 3 $ 0   $ 0  
Transfer out of Level 3 0   0  
Level 2 to Level 1 transfers, Assets 0   0  
Level 1 to Level 2 transfers, Liabilities 0   0  
Level 2 to Level 1 transfers, Liabilities $ 0   $ 0  
Significant Unobservable Inputs (Level 3)        
Transfers between Levels        
Transfer out of Level 3   $ 2,310    
Recurring        
Assets:        
Equity securities   2,310   $ 1,693
Liabilities:        
Contingent consideration   75   75
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)        
Assets:        
Equity securities   2,310    
Recurring | Significant Unobservable Inputs (Level 3)        
Assets:        
Equity securities       1,693
Liabilities:        
Contingent consideration   $ 75   $ 75