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Leases - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Finance Lease Cost:        
Amortization of right-of-use asset $ 50 $ 64 $ 100 $ 129
Interest expense 53 56 106 112
Operating lease cost 76 84 167 172
Variable lease cost 0 1 0 2
Total Lease Cost $ 179 $ 205 $ 373 $ 415