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Leases - Lease Costs and Other Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Lease costs:        
Operating lease costs $ 270 $ 157 $ 507 $ 315
Short-term lease costs 0 5 0 11
Variable lease costs 29 23 55 46
Total 299 185 562 372
Cash paid for amounts included in the measurement of lease liabilities:        
Operating cash flows from operating leases $ 265 $ 150 $ 495 $ 302