Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 116	$ 116	$ 232	$ 232
Finance lease expense:
Amortization of leased assets	6	4	12	8
Interest on lease liabilities	1	2	2	3
Total finance lease cost	7	6	14	11
Total lease expense	$ 123	$ 122	$ 246	$ 243