Leases Operating Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Lease expense	$ 327	$ 312	$ 968	$ 944
Short-term leases	44	30	110	103
Sub-lease income	0	0	0	0
Lease cost	$ 371	$ 342	$ 1,078	$ 1,047