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Leases (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Leases    
Operating lease cost $ 538 $ 675
Cash paid for amounts included in the measurement of lease liabilities 520 659
Operating cash flows from operating leases 0 0
Right-of-use assets obtained in exchange for new lease liabilities - operating leases $ 952 $ 450
Weighted-average remaining lease term - operating leases 6 years 8 months 19 days 7 years 4 months 9 days
Weighted-average discount rate - operating leases 2.71% 2.97%