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Operating Leases - Operating Leases Amount Recognized (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Operating Leases, Rent Expense $ 422 $ 639 $ 860 $ 1,254
Long Term Operating Lease [Member]        
Operating Leases, Rent Expense 388 421 776 865
Short Term Operating Lease [Member]        
Operating Leases, Rent Expense $ 34 $ 218 $ 84 $ 389