Leases - Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Leases
Operating lease cost	$ 148	$ 156	$ 443	$ 441
Net lease cost	148	156	443	441
Operating cash flows from operating leases	142	148	426	416
ROU assets obtained in exchange for new operating lease liabilities	$ 28	$ 43	$ 28	$ 3,295
Weighted average remaining lease term in years	6 years 1 month 28 days		6 years 1 month 28 days		6 years 9 months 3 days
Weighted average discount rate	5.45%		5.45%		5.47%
Operating lease right-of-use assets	$ 2,468		$ 2,468		$ 2,792