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Commitments and Contingencies (Summary of Pre-Acquisition Contingencies) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Jun. 30, 2021
Assets    
Prepaid expenses and other current assets $ 14 $ 16
Other non-current assets 3,677 3,998
Liabilities    
Accrued expenses and other current liabilities 14 16
Other long-term liabilities $ 3,677 $ 3,998