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Operating Leases - Operating Leases Amount Recognized (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Operating Leases, Rent Expense $ 2,110 $ 2,568
Long Term Operating Lease [Member]    
Operating Leases, Rent Expense 1,813 2,246
Short Term Operating Lease [Member]    
Operating Leases, Rent Expense $ 297 $ 322