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Commitments and Contingencies - Cash Paid for Lease Obligations (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]    
Operating cash flows from operating leases $ 774 $ 1,633
Operating cash flows from finance leases 0 6
Finance Lease, Principal Payments $ 60 $ 119