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Fair Value Measurements (Changes in Fair Value of Level 3 Liabilities) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Conversable, Inc.      
Change in Fair Value of Level 3 Liabilities      
Fair value adjustment     $ 500
AdvantageTec      
Change in Fair Value of Level 3 Liabilities      
Fair value adjustment $ 300   200
Contingent earn-out      
Change in Fair Value of Level 3 Liabilities      
Beginning balance   $ 557 2,372
Payments   (294) (1,487)
Ending balance $ 0 0 557
Contingent earn-out | Conversable, Inc.      
Change in Fair Value of Level 3 Liabilities      
Fair value adjustment   0 (496)
Contingent earn-out | AdvantageTec      
Change in Fair Value of Level 3 Liabilities      
Fair value adjustment   $ (263) $ 168