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Operating Leases - summarizes the amounts recognized in the financial statements related to operating leases (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Operating Leases, Rent Expense $ 501
Long Term Operating Lease [Member]  
Operating Leases, Rent Expense 415
Short Term Operating Lease [Member]  
Operating Leases, Rent Expense $ 86