Leases - Summary (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($)
Leases
Operating lease, liability	$ 735
Lease expense	600	$ 593
Cash paid for amounts included in the measurement of lease liabilities for operating leases:	542
ROU assets obtained in exchange for lease liabilities	$ 727
Weighted average remaining lease term in months	16 months
Weighted average discount rate	2.75%
Corporate headquarters and main retail branch
Leases
Number of options to extend | item	1
Extension term	5 years
Option to extend lease term	true
Operating lease, Right-of-use asset	$ 727
Operating lease, liability	$ 735