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Commitments and Contingencies - Cash Paid for Lease Obligations (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]    
Operating cash flows from operating leases $ 354 $ 812
Operating cash flows from finance leases 0 5
Finance Lease, Principal Payments $ 51 $ 59