Lease - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019
Leases [Abstract]
Operating lease liability		$ 964
Right of use asset		$ 902
Weighted average remaining lease term (in years)		4 years 2 months 12 days
Weighted average discount rate		3.14%
Operating lease expense, under Topic 840	$ 510