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Leases (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Leases    
Operating lease cost $ 418 $ 443
Cash paid for amounts included in the measurement of lease liabilities 404 432
Operating cash flows from operating leases 0 0
Right-of-use assets obtained in exchange for new lease liabilities - operating leases $ 942 $ 132
Weighted-average remaining lease term - operating leases 6 years 10 months 2 days 7 years 10 days
Weighted-average discount rate - operating leases 2.71% 3.13%