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Commitments and Contingencies (Summary of Pre-Acquisition Contingencies) (Details) - Network1 [Member] - USD ($)
$ in Thousands
Dec. 31, 2019
Jun. 30, 2019
Assets    
Prepaid expenses and other current assets $ 723 $ 761
Other non-current assets 4,962 5,219
Liabilities    
Accrued expenses and other current liabilities 723 761
Other long-term liabilities $ 4,962 $ 5,219