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Leases - Summary of Lease Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Finance lease cost:        
Amortization of right-of-use asset $ 45 $ 45 $ 135 $ 105
Interest expense on lease liability 33 34 100 80
Total finance lease cost 78 79 235 185
Operating lease cost 504 515 1,537 1,545
Short-term and equipment lease cost 10 11 31 42
Sublease income (3) (6) (13) (18)
Total lease costs $ 589 $ 599 $ 1,790 $ 1,754